exv2w1

Table of Contents


	Page
I. DEFINITIONS		1
1.1 Defined Terms		1
1.2 Certain Additional Defined Terms		7
II. PURCHASE OF EQUITY INTERESTS AND ASSETS		8
2.1 Concho Holdings Stockholders		8
2.2 Chase Assets		8
2.3 Caza Assets		9
2.4 WI Assets		9
2.5 Tax Treatment		9
2.6 Non-Accredited Investors and Non-Selling Accredited Investors		9
III. REPRESENTATIONS AND WARRANTIES		10
3.1 Representations and Warranties of Concho Holdings		10
3.2 Representations and Warranties of the Concho Holdings Stockholders		16
3.3 Representations and Warranties of Chase		18
3.4 Representations and Warranties of Caza		24
3.5 Representations and Warranties of WI Owners		29
3.6 Representations and Warranties of Concho Resources		33
IV. CONDUCT OF BUSINESS PRIOR TO CLOSING		34
4.1 Ordinary Course		35
4.2 Dividends; Changes in Equity Interests		35
4.3 Issuance of Securities		35
4.4 Encumbrances		35
4.5 Governing Documents		35
4.6 No Acquisitions		35
4.7 No Dispositions		35
4.8 No Dissolution		36
4.9 Accounting		36
4.10 Insurance		36
4.11 Tax Matters		36
4.12 Certain Employee Matters		36
4.13 Indebtedness; Agreements; Capital Expenditures; Litigation		36
V. ADDITIONAL AGREEMENTS		36
5.1 Access to Information and Field Assets		36
5.2 Regulatory Approvals		37
5.3 Agreement to Defend		37
5.4 Public Announcements		37
5.5 Certain Actions of Concho Holdings and the Concho Holdings Stockholders		37
5.6 Ancillary Agreements		38
5.7 Credit Agreements		38
5.8 Other Actions		38
5.9 Indemnification Arrangements		38
5.10 Transfer Taxes		39
5.11 Proration of Property Taxes		39


	Page
5.12 Adjustments		39
5.13 Concho Resources Board of Directors		40
5.14 Preferential Rights and Consents		40
5.15 Registration Statement and Prospectus		40
5.16 Lease Purchase Agreement		41
5.17 Offer to Chase Non-Accredited Investors and Chase Accredited Investors		41
VI. CONDITIONS TO CLOSING		42
6.1 Conditions to Each Party’s Obligation to Effect the Transactions Contemplated by this Agreement.		42
VII. CLOSING		43
7.1 Closing		43
7.2 Actions to Occur at Closing		43
VIII. TERMINATION		43
8.1 Termination		43
8.2 Effect of Termination		44
8.3 Amendment		44
8.4 Extension; Waiver		44
IX. SURVIVAL		45
9.1 No Survival		45
X. GENERAL PROVISIONS		45
10.1 Notices		45
10.2 Descriptive Headings		46
10.3 Counterparts		46
10.4 Entire Agreement; No Third Party Beneficiaries		46
10.5 Governing Law		46
10.6 Severability		46
10.7 Assignment		47

SCHEDULES

Schedule I—Concho Holdings Stockholders
Schedule II—WI Owners
Schedule III—Assets of the Sellers
Schedule IV—Chase Non-Accredited Investors and Additional Non-Accredited Assets
Schedule V—Chase Accredited Investors and Additional Accredited Assets
Caza Disclosure Schedule
Chase Disclosure Schedule
Concho Holdings Disclosure Schedule
Concho Holdings Stockholders Disclosure Schedule
Concho Resources Disclosure Schedule

EXHIBITS

5.6(a)—Stockholders’ Agreement
5.6(b)—Registration Rights Agreement
5.6(c)—Voting Agreement
5.6(d)—Business Opportunities Agreement
5.6(e)—Contract Operator Agreement

COMBINATION AGREEMENT

This Combination Agreement (this “Agreement”) is entered into as of February 24, 2006 by and among Concho Resources Inc., a Delaware corporation (“Concho Resources”), Concho Equity Holdings Corp., a Delaware corporation (“Concho Holdings”), all of the stockholders of Concho Holdings listed on Schedule I attached hereto (the “Concho Holdings Stockholders”), Chase Oil Corporation, a New Mexico corporation (“Chase”), Caza Energy LLC, a New Mexico limited liability company (“Caza”) and the Persons listed on Schedule II attached hereto (collectively, the “WI Owners”).

RECITALS

WHEREAS, the Concho Holdings Stockholders have agreed to exchange all of the outstanding capital stock of Concho Holdings owned by them for the Concho Holdings Consideration;

WHEREAS, Chase has agreed to transfer to Concho Resources the Chase Assets in exchange for the Chase Consideration;

WHEREAS, Caza has agreed to transfer to Concho Resources the Caza Assets in exchange for the Caza Consideration;

WHEREAS, the WI Owners have agreed to transfer to Concho Resources the WI Assets in exchange for the WI Consideration; and

WHEREAS, the parties hereto desire to set forth the terms pursuant to which the transactions described above shall be consummated;

NOW, THEREFORE, in consideration of the above premises and the respective representations, warranties, agreements and conditions hereinafter set forth, and other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto, intending to be legally bound, hereby agree as follows:

I. DEFINITIONS

1.1 Defined Terms. As used in this Agreement, each of the following terms has the meaning given in this Section 1.1 or in the Section referred to below:

“Additional Accredited Assets” means and includes all of the Chase Accredited Investor’s respective Oil and Gas Interests set forth on Schedule V attached hereto

“Additional Non-Accredited Assets” means and includes all of the Chase Non-Accredited Investor’s respective Oil and Gas Interests set forth on Schedule IV attached hereto.

“Affiliates” means, with respect to any Person, any other Person that, directly or indirectly, controls, is controlled by or is under common control with, such specified Person through one or more intermediaries or otherwise. For purposes of this definition, “control” means, where used with respect to any Person, the possession, directly or indirectly, of the power to direct or cause the direction of the management and policies of such Person, whether through

the ownership of voting securities, by contract or otherwise, and the terms “controlling” and “controlled” have correlative meanings.

“Assets” means and includes all of the Sellers’ respective Oil and Gas Interests set forth in Sellers’ Reserve Report, including without limitation, the Oil and Gas Interests on Schedule III attached hereto and the Chase Assets, the Caza Assets and the WI Assets.

“Basic Documents” means the oil, gas and/or mineral leases which are included as part of the Oil and Gas Interests of such Person; all contracts and agreements, licenses, permits and easements, rights-of-way and other rights-of-surface use comprising any part of or otherwise relating to the Oil and Gas Interests of such Person; and all Operational Contracts of such Person. References in this Agreement to the “Basic Documents of the Concho Holdings Companies” mean the collective Basic Documents of the Concho Holdings Companies. References in this Agreement to the “Basic Documents of Chase” mean the collective Basic Documents of Chase related to the Chase Assets. References in this Agreement to the “Basic Documents of Caza” mean the collective Basic Documents of Caza related to the Caza Assets. References in this Agreement to the “Basic Documents of the WI Owners” mean the collective Basic Documents of the WI Owners related to the WI Assets.

“Caza Disclosure Schedule” means the Caza Disclosure Schedule delivered in connection with this Agreement and any documents listed on such Caza Disclosure Schedule or expressly incorporated therein by reference.

“CERCLA” means the Comprehensive Environmental Response, Compensation and Liability Act of 1980, as amended.

“Chase Disclosure Schedule” means the Chase Disclosure Schedule delivered in connection with this Agreement and any documents listed on such Chase Disclosure Schedule or expressly incorporated therein by reference.

“Commission” means the United States Securities and Exchange Commission.

“Concho Assets” means and includes all of Concho Holdings Companies’ assets.

“Concho Holdings Common Stock” means the common stock, par value $0.01 per share, of Concho Holdings.

“Concho Holdings Companies” means Concho Holdings and any corporation more than 50% of whose outstanding voting securities, or any general partnership, joint venture, or similar entity more than 50% of whose total equity interests, is owned, directly or indirectly, by Concho Holdings, or any limited partnership of which Concho Holdings or any of its subsidiaries is a general partner.

“Concho Holdings Consideration” means the Concho Holdings Common Consideration and the Concho Holdings Preferred Consideration.

“Concho Holdings Disclosure Schedule” means the Concho Holdings Disclosure Schedule delivered in connection with this Agreement and any documents listed on such Concho Holdings Disclosure Schedule or expressly incorporated therein by reference.

“Concho Holdings Preferred Stock” means the preferred stock, par value $0.01 per share, of Concho Holdings.

“Concho Holdings Reserve Report” means the report furnished to Concho Resources by Concho Holdings prior to the date hereof estimating the Concho Holdings Companies proved oil and gas reserves as of December 31, 2005, as audited by Netherland, Sewell & Associates, Inc.

“Concho Holdings Stock Option” means an option (issued and outstanding immediately prior to the Closing) to acquire shares of Concho Holdings Common Stock and Concho Holdings Preferred Stock granted pursuant to the Concho Holdings Stock Option Plan.

“Concho Holdings Stock Option Plan” means the Concho Equity Holdings Corp. 2004 Stock Option Plan.

“Concho Holdings Stock Purchase Agreement” means that certain Stock Purchase Agreement dated as of August 13, 2004, by and among Concho Holdings and the parties listed therein.

“Concho Holdings Stockholders’ Agreement” means that certain Voting and Stockholders’ Agreement dated as of August 13, 2004, by and among Concho Holdings and the stockholders listed therein.

“Concho Holdings Stockholders Disclosure Schedule” means the Concho Holdings Stockholders Disclosure Schedule delivered in connection with this Agreement and any documents listed on such Concho Holdings Stockholders Disclosure Schedule or expressly incorporated therein by reference.

“Concho Resources Common Stock” means the common stock of Concho Resources, par value $0.001 per share.

“Concho Resources Disclosure Schedule” means the Concho Resources Disclosure Schedule delivered in connection with this Agreement and any documents listed on such Concho Resources Disclosure Schedule or expressly incorporated therein by reference.

“Effective Date” means January 1, 2006.

“Environmental Law” means any federal, state or local statute, law, code, ordinance, rule, regulation, Permit, order or other legally enforceable authorization in effect on or before the Closing Date and applicable to the operations of the applicable party: (a) relating to Releases of Hazardous Materials into the environment, (b) relating to the generation, treatment, storage, use, handling, manufacturing or transportation of Hazardous Materials; (c) relating to health (to the extent relating to exposure to Hazardous Materials) and safety; or (d) otherwise relating to protection or pollution of the environment.

“Escrow Agreement” means that certain Escrow Agreement dated of even date herewith by and among the Concho Holdings Stockholders and the escrow agent named therein, which complies with the terms of Revenue Procedure 84-42.

“Equity Interest” means (a) the equity ownership rights in a business entity, whether a corporation, limited liability company, general or limited partnership, sole proprietorship or other business entity or organization, and whether in the form of capital stock, limited liability company interests, limited or general partnership interests or any other form of ownership, and (b) all Equity Interest Equivalents.

“Equity Interest Equivalents” means all rights, warrants, options, convertible securities or indebtedness, exchangeable securities or other instruments, or other rights that are outstanding and exercisable for or convertible or exchangeable into, directly or indirectly, any equity ownership rights in a business entity, whether a corporation, limited liability company, general or limited partnership, sole proprietorship or other business entity or organization, and whether in the form of capital stock, limited liability company interests, limited or general partnership interests or any other form of ownership, at the time of issuance or upon the passage of time or occurrence of some future event.

“GAAP” means generally accepted accounting principles, as recognized by the U.S. Financial Accounting Standards Board (or any generally recognized successor).

“Governmental Authority” means any national, state, county or municipal government, domestic or foreign, any agency, board, bureau, commission, court, department or other instrumentality of any such government, or any arbitrator in any case that has jurisdiction over any party hereto or any of their respective properties or assets.

“Hazardous Material” means: (a) any chemical, material, waste, pollutant or substance listed, defined or otherwise regulated by any Environmental Law; (b) any asbestos-containing materials, polychlorinated biphenyls, or radioactive materials or (c) petroleum, petroleum hydrocarbons or any fraction or byproducts thereof.

“Hydrocarbons” means oil, condensate, gas, casinghead gas and other liquid or gaseous hydrocarbons.

“Lien” means any lien, mortgage, security interest, pledge, deposit, restriction, burden, encumbrance, rights of a vendor under any title retention or conditional sale agreement or lease or other arrangement substantially equivalent thereto.

“Material Adverse Effect” means any result, occurrence, condition, fact, change, event or effect that individually or in the aggregate with any such other results, occurrences, facts, changes, events or effects, is or could reasonably be expected to be materially adverse to the assets or the financial condition, operations, business, assets, liabilities or earnings of the applicable party or the ability of the applicable party to perform its obligations under or consummate the transactions contemplated by this Agreement.

“Oil and Gas Interest(s)” means all (a) interests in and rights with respect to oil, gas, mineral and related properties and assets of any kind and nature, including working, cost-bearing, net profit, royalty and overriding royalty interests, production payments, operating rights, net profits interests, non-working interests and non-operating interests; (b) interests in and rights with respect to Hydrocarbons and other minerals or revenues therefrom and contracts in connection therewith and claims and rights thereto (including oil and gas leases, operating agreements, unitization and pooling agreements and orders, division orders, transfer orders,

mineral deeds, royalty deeds, oil and gas sales, exchange and processing contracts and agreements and, in each case, interests thereunder), surface and subsurface interests, fee interests, reversionary interests, reservations and concessions; (c) easements, rights of way, privileges, licenses, permits, leases, and other interests associated with, appurtenant to, or necessary for the operation of any of the foregoing; and (d) interests in equipment and machinery (including well equipment and machinery), oil and gas production, gathering, transmission, compression, treating and processing facilities or equipment (including tanks, tank batteries, pipelines and gathering systems), pumps, water plants, electric plants, gasoline and gas processing plants, refineries and other tangible personal property and fixtures associated with, appurtenant to, or necessary for the operation of any of the foregoing; except for in the case of (a), (b) and (c), all interests in minerals, mineral fee interests, royalties, overriding royalty interests and other similar types of non-leasehold interests in and to the Assets currently owned of record by Chase, Caza or the WI Owners as evidenced by an instrument of conveyance, a reservation in an instrument of conveyance or other instrument recorded in the records of the county clerk of the county in which the Assets are located and in the case of (d) interests in or relating to the Saltwater Disposal System. References in this Agreement to the “Oil and Gas Interests of the Concho Holdings Companies” or the “Concho Holdings Companies’ Oil and Gas Interests” mean the collective Oil and Gas Interests of the Concho Holdings Companies. References in this Agreement to the “Oil and Gas Interests of Chase” or “Chase’s Oil and Gas Interests” mean the collective Oil and Gas Interests included in the Chase Assets. References in this Agreement to the “Oil and Gas Interests of Caza” or “Caza’s Oil and Gas Interests” mean the collective Oil and Gas Interests included in the Caza Assets. References in this Agreement to the “Oil and Gas Interests of the WI Owners” or “the WI Owners’ Oil and Gas Interests” mean the collective Oil and Gas Interests included in the WI Assets. References in this Agreement to the “Oil and Gas Interests of the Sellers” or “the Sellers’ Oil and Gas Interests” mean the collective Oil and Gas Interests included in the Assets.

“Operational Contracts” means all contracts and agreements that are reasonably necessary to own, explore, develop, operate, maintain or use the Oil and Gas Interests of a Person in the manner in which they are currently being owned, explored, developed, operated, maintained or used, and in accordance with the prudent practices of the oil and gas industry.

“Parties” means Sellers and Concho Holdings, the Concho Holdings Stockholders, and Concho Resources.

“Business Day” means any day that is not a Saturday, Sunday or legal holiday in the State of Texas or a federal holiday in the United States.

“Permit” means any permit, license, registration, consent, exemption, variance, or approval.

“Permitted Liens” means (a) Liens for Taxes, impositions, assessments, fees, rents or other governmental charges levied, assessed or imposed not yet delinquent, (b) statutory Liens (including materialmen’s, warehousemen’s, mechanic’s, repairmen’s, landlord’s, and other similar Liens) arising in the ordinary course of business securing payments not yet delinquent, (c) Liens of public record, (d) the rights of lessors and lessees under leases, and the rights of third parties under any agreement, executed in the ordinary course of business, (e) the rights of licensors and licensees under licenses executed in the ordinary course of business, (f) restrictive

covenants, easements and defects, imperfections or irregularities of title or Liens, if any, as would not reasonably be expected to result in a Material Adverse Effect on the Assets, (g) purchase money Liens and Liens securing rental payments under capital lease arrangements, (h) preferential purchase rights and other similar arrangements with respect to which consents or waivers are obtained for the transactions contemplated by this Agreement or as to which the time for asserting such rights has expired at the Closing Date without an exercise of such rights, (i) restrictions on transfer with respect to which consents or waivers are obtained for the transactions contemplated by this Agreement, (j) any Liens created pursuant to operating or similar agreements, (k) Liens entered into in the ordinary course of business which do not secure the payment of indebtedness for borrowed money and which do not materially and adversely affect the ability of Chase or Caza to conduct their business, (l) Liens shown on the Chase Disclosure Schedule or the Caza Disclosure Schedule and (m) Liens created by Concho Holdings, Concho Holdings Stockholders, Concho Resources or their Affiliates, or their successors and assigns; provided, however, that as to each of the foregoing none shall serve to (A) impair or diminish the value, ownership, operation or development of any Asset, or (B) reduce any working interest or net revenue, or increase any Asset or working interest without a corresponding increase in the associated net revenue, set forth respectively in the Sellers Reserve Report or the Concho Holdings Reserve Report.

“Person” means any natural person, corporation, partnership, limited liability company, trust, unincorporated organization, Governmental Authority, or other entity.

“Properties” means all (a) interests in and rights with respect to oil, gas, mineral and related properties and assets of any kind and nature, including working, cost-bearing, net profit, royalty and overriding royalty interests, production payments, operating rights, net profits interests, non-working interests and non-operating interests and (b) interests in and rights with respect to Hydrocarbons and other minerals or revenues therefrom and contracts in connection therewith and claims and rights thereto (including oil and gas leases, operating agreements, unitization and pooling agreements and orders, division orders, transfer orders, mineral deeds, royalty deeds, oil and gas sales, exchange and processing contracts and agreements and, in each case, interests thereunder), surface and subsurface interests, fee interests, reversionary interests, reservations and concessions; except for in each case, all interests in minerals, mineral fee interests, royalties, overriding royalty interests and other similar types of non-leasehold interests in and to the Assets currently owned of record by Chase, Caza or the WI Owners as evidenced by an instrument of conveyance, a reservation in an instrument of conveyance or other instrument recorded in the records of the county clerk of the county in which the Assets are located.

“Release” means any depositing, spilling, leaking, pumping, pouring, placing, emitting, discarding, abandoning, emptying, discharging, migrating, injecting, escaping, leaching, dumping or disposing.

“Reasonable Efforts” means efforts in accordance with reasonable commercial practice and without the incurrence of unreasonable expense.

“Representatives” means, as to any Person, its officers, directors, employees, counsel, accountants, financial advisers and consultants.

“Saltwater Disposal System: means that certain saltwater disposal system located in Eddy and Lea Counties, New Mexico owned by Chase, Caza, the WI Owners and certain Affiliates thereof, as further described in that Assignment, Bill of Sale and Conveyance of Salt Water Disposal System Facilities dated as of even date herewith, in the form attached as Exhibit 5.6(f) of this Agreement.

“Securities Act” means the Securities Act of 1933, as amended.

“Sellers” means Chase, Caza and the WI Owners, collectively, and “Seller” means each of Chase, Caza and the WI Owners, respectively.

“Sellers Reserve Report” means the report furnished to Concho Resources by Chase prior to the date hereof estimating the proved oil and gas reserves as of December 31, 2005 of Chase, Caza and the WI Owners, as audited by Cawley, Gillespie & Associates, Inc.

“Third-Party Consent” means the consent or approval of any Person other than any Governmental Authority.

1.2 Certain Additional Defined Terms. In addition to such terms as are defined in Section 1.1, the following terms are used in this Agreement and defined in the preamble to this Agreement or in the Section of this Agreement set forth opposite such term:


Defined Term	Section Reference
Agreement	Preamble
Ancillary Agreements		5.7
Caza	Preamble
Caza Assets		2.3
Caza Balance Sheet		3.4(e)
Caza Consideration		2.3
Caza Financial Statements		3.4(e)
Chase	Preamble
Chase Accredited Investors		2.6(c)
Chase Assets		2.2
Chase Balance Sheet		3.3(e)
Chase Consideration		2.2
Chase Entities		5.8
Chase Financial Statements		3.3(e)
Chase Non-Accredited Investors		2.6
Closing		7.1
Closing Date		7.1
Code		2.5
Concho Holdings	Preamble
Concho Holdings Balance Sheet		3.1(e)
Concho Holdings Common Consideration		2.1(a)
Concho Holdings Financial Statements		3.1(e)
Concho Holdings Preferred Consideration		2.1(b)
Concho Holdings Stockholders	Preamble
Concho Non-Accredited Investors		2.6


Defined Term	Section Reference
Concho Non-Participating Investors		2.6(a)
Concho Resources	Preamble
Concho Resources Entities		5.8
Consents		5.15
ERISA		3.1(j)
Indemnified Party		5.10
IPO		5.16
Merger Sub		2.6(a)
Preferential Rights		5.15
Proscribed Action		2.5
Transfer Taxes		5.12
WI Assets		2.4
WI Consideration		2.4
WI Owners	Preamble

II. PURCHASE OF EQUITY INTERESTS AND ASSETS

Subject to the terms and conditions of this Agreement, on the Closing Date:

2.1 Concho Holdings Stockholders.

(a) Each Concho Holdings Stockholder shall transfer and assign to Concho Resources all shares of the outstanding Concho Holdings Common Stock then owned by such Concho Holdings Stockholder free and clear of any Liens, and, in exchange therefor, such Concho Holdings Stockholder shall receive one (1) share of Concho Resources Common Stock for each share of Concho Holdings Common Stock so transferred and assigned (the aggregate number of such shares of Concho Resources Common Stock being hereinafter referred to as the “Concho Holdings Common Consideration”).

1. Each Concho Holdings Stockholder shall transfer and assign to Concho Resources all shares of the outstanding Concho Holdings Preferred Stock then owned by such Concho Holdings Stockholder free and clear of any Liens, and, in exchange therefor, such Concho Holdings Stockholder shall receive one and one-half (1.5) shares of Concho Resources Common Stock for each share of Concho Holdings Preferred Stock so transferred and assigned (the aggregate number of such shares of Concho Resources Preferred Stock being hereinafter referred to as the “Concho Holdings Preferred Consideration”).

(b) At or prior to the Closing, the Concho Holdings Stock Option Plan will be assumed and adopted by Concho Resources. At the Closing, each Concho Holdings Stock Option that is outstanding and unexercised immediately prior to the Closing shall be assumed by Concho Resources and adjusted to become an option to purchase shares of Concho Resources Common Stock in accordance with the rules set forth in Treasury Regulations Section 1.424-1(a).

2.2 Chase Assets. Chase shall transfer and assign to Concho Resources all of its right, title and interest in and to the Assets (the “Chase Assets”) free and clear of any Liens,

other than Permitted Liens, and Concho Resources shall acquire the Chase Assets in exchange for 56,009,965 shares of Concho Resources Common Stock and $322,979,318 in cash (the “Chase Consideration”).

2.3 Caza Assets. Caza shall transfer and assign to Concho Resources all of its right, title and interest in and to the Assets (the “Caza Assets”) free and clear of any Liens, other than Permitted Liens, and Concho Resources shall acquire the Caza Assets in exchange for 4,999,851 shares of Concho Resources Common Stock and $28,831,450 in cash (the “Caza Consideration”).

2.4 WI Assets. Each WI Owner shall transfer and assign to Concho Resources all of such WI Owner’s right, title and interest in and to the Assets (such Assets of all WI Owners being hereinafter collectively referred to as, the “WI Assets”) free and clear of any Liens, other than Permitted Liens, and Concho Resources shall acquire the WI Assets in exchange for an aggregate of 8,356,811 shares of Concho Resources Common Stock and $48,189,232 in cash (the “WI Consideration”). The WI Consideration shall be paid to each of the WI Owners as set forth on Schedule II hereto.

2.5 Tax Treatment. The parties hereto intend for the transactions described herein to qualify for nonrecognition of gain or loss under Section 351(a) of the Internal Revenue Code of 1986, as amended (the “Code”). The parties agree to report the transactions in accordance with the foregoing sentence for all federal income tax purposes. Each party agrees to take no action which, alone or in combination with the actions of others, reasonably could prevent the transactions from qualifying for nonrecognition of gain or loss under Section 351(a) of the Code (a “Proscribed Action”), including, but not limited to, any prearranged sale, distribution, contribution or other disposition of Concho Resources Common Stock. For purposes of this Section 2.5, the parties shall assume that the Sellers will sell to third parties in a registered secondary offering in connection with the IPO 20% of the shares of Concho Resources Common Stock and any such sale by the Sellers of up to 20% of the shares of Concho Resources Common Stock shall not, with respect to the Sellers, be considered a Proscribed Action. A Proscribed Action shall not include a redemption of Concho Resources Common Stock by Concho Resources.

2.6 Non-Accredited Investors and Non-Selling Accredited Investors. The parties to this Agreement acknowledge that the Concho Non-Participating Investors (defined below) own certain shares of Concho Holdings Common Stock and Concho Holdings Preferred Stock, and the Chase Non-Accredited Investors (defined below) and Chase Accredited Investors (as defined below) own certain interests in the Assets, which are integral and vital to the transactions contemplated by this Agreement and the future success of Concho Resources. The parties to this Agreement acknowledge it is contemplated that (i) with respect to the Concho Non-Participating Investors and the Chase Non-Accredited Investors, as soon as possible after the informational requirements of Regulation D under the Securities Act are met and (ii) with respect to the Chase Accredited Investors, as soon as possible:

(a) (1) Concho Resources will contribute 100% of the shares of Concho Holdings received from the Concho Holdings Stockholders to a newly-created wholly-owned subsidiary of Concho Resources (“Merger Sub”); (2) Merger Sub will merge with and into Concho Holdings (with Concho Holdings being the surviving entity)

pursuant to Section 253 of the General Corporation Law of the State of Delaware in a merger intended to qualify as a reorganization under Section 368(a) of the Code; and (3) as a result of such merger, each holder of capital stock of Concho Holdings other than Merger Sub (the “Concho Non-Participating Investors”) shall be entitled to receive (upon surrender of each share of capital stock of Concho Holdings then held by such Person) such number of shares of Concho Resources Common Stock as such holder would have been entitled to receive had such holder been a party to the Escrow Agreement; and

(b) each of the non-accredited investors listed in Schedule IV to this Agreement (the “Chase Non-Accredited Investors”) shall transfer and assign to Concho Resources using substantially the same form of assignment used to convey the Assets to Concho Resources or its Affiliates all of such Chase Non-Accredited Investor’s right, title and interest in and to the Additional Non-Accredited Assets free and clear of any Liens, other than Permitted Liens, and Concho Resources, as of the Effective Date, shall acquire such Chase Non-Accredited Investor’s right, title and interest in and to the Additional Non-Accredited Assets in exchange for total aggregate consideration not to exceed $905,928.45 in the form of, at the option of such Chase Non-Accredited Investor, shares of Concho Resources Common Stock (at a per share price of $6.00) and/or cash.

(c) each of the non-participating accredited investors listed in Schedule V to this Agreement (the “Chase Accredited Investors”) shall transfer and assign to Concho Resources using substantially the same form of assignment used to convey the Assets all of such Chase Accredited Investor’s right, title and interest in and to the Additional Accredited Assets free and clear of any Liens, other than Permitted Liens, and Concho Resources, as of the Effective Date, shall acquire such Chase Accredited Investor’s right, title and interest in and to the Additional Accredited Assets in exchange for total aggregate consideration not to exceed $10,267,059.99 in the form of, at the option of such Chase Accredited Investor, shares of Concho Resources Common Stock (at a per share price of $6.00) and/or cash.

III. REPRESENTATIONS AND WARRANTIES

3.1 Representations and Warranties of Concho Holdings. Concho Holdings hereby represents and warrants to Concho Resources and the Sellers as follows, except as set forth, specifically with reference to a particular section below, on the Concho Holdings Disclosure Schedule:

(a) Organization. Each of the Concho Holdings Companies is duly organized, validly existing and in good standing under the laws of the jurisdiction in which it is organized; has the requisite power and authority to own, lease and operate its properties and to conduct its business as it is presently being conducted; and is duly qualified to do business as a foreign entity and is in good standing, in each jurisdiction where the character of the properties owned or leased by it or the nature of its activities makes such qualification necessary (except where any failure to be so qualified or to be in good standing would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on Concho Holdings or Concho Resources).

(b) Authority and Enforceability. Concho Holdings has the requisite corporate power and authority to enter into and deliver this Agreement and to consummate the transactions contemplated hereby. The execution and delivery by Concho Holdings of this Agreement and the consummation of the transactions contemplated hereby have been duly and validly authorized by all necessary corporate action, including approval by the board of directors and the stockholders of Concho Holdings, and no other corporate proceedings are necessary to consummate the transactions contemplated hereby. This Agreement has been duly and validly executed and delivered and constitutes a valid and binding obligation of Concho Holdings enforceable against it in accordance with its terms, except as such enforceability may be limited by bankruptcy, insolvency, reorganization and similar laws affecting creditors generally and by the availability of equitable remedies.

(c) No Violations. The execution and delivery of this Agreement and the consummation of the transactions contemplated hereby will not, conflict with, result in any violation of or default (with or without notice or lapse of time or both) under, give rise to a right of termination, cancellation or acceleration of any obligation or to the loss of a material benefit under, or result in the creation of any Lien on any of the properties or assets of the Concho Holdings Companies under, any provision of: (i) the certificate of incorporation, bylaws or any other organizational documents of any of the Concho Holdings Companies; (ii) any agreement including any loan or credit agreement, note, bond, mortgage, indenture, lease, permit, concession, franchise, license or other agreement or instrument applicable to the Concho Holdings Companies or by which any of their respective assets or properties may be bound; or (iii) any judgment, order, decree, statute, law, ordinance, rule or regulation applicable to the Concho Holdings Companies or any of their respective properties or assets, other than, in the case of clause (ii) or (iii) above, any such conflict, violation, default, right, loss or Lien that, individually or in the aggregate, would not reasonably be expected to have a Material Adverse Effect on Concho Holdings or Concho Resources.

(d) No Consents. No consent, approval, order or authorization of, registration, declaration or filing with, or permit from, any Governmental Authority is required by or with respect to any of the Concho Holdings Companies in connection with the execution and delivery by Concho Holdings of this Agreement or the consummation by Concho Holdings of the transactions contemplated hereby. No Third-Party Consent is required by or with respect to any of the Concho Holdings Companies in connection with the execution and delivery by it of this Agreement or the consummation by Concho Holdings of the transactions contemplated hereby, except for any such Third-Party Consent which the failure to obtain would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on Concho Holdings.

(e) Financial Statements. Concho Holdings has delivered to Concho Resources and the Sellers copies of the financial statements listed on Schedule 3.1(e) of the Concho Holdings Disclosure Schedule (such financial statements collectively being referred to as the “Concho Holdings Financial Statements”). The Concho Holdings Financial Statements, including the notes thereto, were prepared in accordance with GAAP applied on a consistent basis throughout the periods covered thereby (except to the extent disclosed therein or required by changes in GAAP) and fairly present in all

material respects the consolidated financial position of Concho Holdings at the dates thereof and the consolidated results of the operations of Concho Holdings for the periods indicated. There is no liability or obligation of any kind, whether accrued, absolute, fixed, contingent, or otherwise, of Concho Holdings other than (i) liabilities adequately reflected or reserved against in the Concho Holdings Balance Sheet (or expressly identified in the notes to the Concho Holdings Financial Statements), (ii) liabilities incurred in the ordinary course of business consistent with past practice since September 30, 2005 or (iii) any such liabilities which would not be required to be presented in financial statements or the notes thereto prepared in conformity with GAAP applied, in a manner consistent with past practice, in the preparation of the Concho Holdings Financial Statements and which, individually or in the aggregate (A) would not reasonably be expected to have a Material Adverse Effect on Concho Holdings, taken as a whole, or Concho Resources and (B) do not in any case exceed $1,000,000 in the aggregate (provided that this clause (B) shall not constitute evidence of whether a liability, obligation or other fact, event or occurrence shall constitute a Material Adverse Effect).

(f) Capital Structure. The authorized capital stock of Concho Holdings consists of 30,000,000 shares of common stock and 30,000,000 shares of preferred stock. There are 21,891,184 shares of common stock issued and outstanding, and 17,411,025 shares of preferred stock issued and outstanding. There are 1,879,334 issued and outstanding Concho Holdings Stock Options. No shares of capital stock are reserved for issuance for any other purpose. All the issued and outstanding shares of capital stock of Concho Holdings are duly authorized, validly issued, fully paid and nonassessable and have not been issued in violation of any preemptive or similar rights. There are no Equity Interest Equivalents or other contracts of any character to which Concho Holdings is a party or by which it is bound obligating Concho Holdings to issue, deliver, sell, pledge, dispose of or encumber or cause to be, issued, delivered, sold, pledged, disposed of or encumbered additional Equity Interests of Concho Holdings. There are no outstanding obligations of Concho Holdings to repurchase, redeem, or otherwise acquire any Equity Interests of Concho Holdings. Schedule 3.1(f) of the Concho Holdings Disclosure Schedule identifies as of the date of this Agreement the record and beneficial owner, if different, of the issued and outstanding Concho Holdings Equity Interests. On the Closing Date pursuant to the terms and conditions of this Agreement, Concho Resources will acquire at least 98% of the issued and outstanding shares of Concho Holdings Common Stock, free and clear of any Liens and at least 98% of the issued and outstanding shares of Concho Holdings Preferred Stock, free and clear of any Liens.

(g) Violations; Defaults; Permits. None of the Concho Holdings Companies is in violation of, or in default in any material respect under, and no event has occurred that (with notice or the lapse of time or both) would constitute a violation of or default under (i) its certificate of incorporation, bylaws or other organizational documents, (ii) any applicable law, rule, regulation, ordinance, order, writ, decree or judgment of any Governmental Authority, or (iii) any agreement of the Concho Holdings Companies, except (in the case of clause (ii) or (iii) above) for any violation or default that would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on Concho Holdings. The Concho Holdings Companies have obtained and hold all permits, licenses, variances, exemptions, orders, franchises, approvals and authorizations of all Persons necessary for the lawful conduct of their respective

businesses and the lawful ownership, use and operation of their respective assets, except for such permits, licenses, variances, exemptions, orders, franchises, approvals and authorizations which the failure to obtain or hold would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on Concho Holdings.

(h) Litigation. No litigation, arbitration, investigation or other proceeding of any Person is pending or, to the knowledge of Concho Holdings, threatened against Concho Holdings or its assets, nor to the knowledge of Concho Holdings are there any facts or circumstances existing which could reasonably give rise to any such litigation, arbitration, investigation or proceeding. Concho Holdings is not subject to any outstanding injunction, judgment, order, decree, settlement agreement, conciliation agreement, letter of commitment, deficiency letter or ruling (other than routine oil and gas field regulatory orders).

(i) Taxes. Each of the Concho Holdings Companies has filed accurately and completely all federal, state, local and foreign tax returns and reports required to be filed by it and has paid all applicable taxes due. No taxing authority or agency, domestic or foreign, is now asserting or, to the knowledge of Concho Holdings, threatening to assert against any of the Concho Holdings Companies any adjustment, deficiency or claim for additional taxes or interest thereon or penalties in connection therewith. None of the Concho Holdings Companies has granted any waiver of any statute of limitations with respect to, or any extension of a period for the assessment of, any federal, state, county, municipal or foreign tax. The accruals and reserves for taxes reflected in the Concho Holdings Financial Statements are adequate to cover all taxes accruable through such date (including interest and penalties, if any, thereon) in accordance with GAAP. There are no tax Liens on the assets of the Concho Holdings Companies other than Liens for taxes not yet due and payable.

(j) ERISA. During the past six years, none of the Concho Holdings Companies or any Affiliate have made or been required to make contributions to any “multiemployer plan,” as defined in Section 3(37) of the Employee Retirement Income Security Act of 1974 (“ERISA”). The Concho Holdings Companies and their Affiliates have paid and discharged promptly when due all liabilities and obligations arising under ERISA or the Code of a character which if unpaid or unperformed might result in the imposition of a lien against any of the assets or properties of the Concho Holdings Companies. For purposes of this subsection, “Affiliate” means any trade or business (whether or not incorporated) that is as of the date of this Agreement, or at any time within the six years preceding the date hereof would have been, treated as a “single employer” with any of the Concho Holdings Companies under Section 414(b), (c), (m) or (o) of the Code.

(k) Title to Assets. The Concho Holdings Companies have (i) good and defensible title to their respective assets, including, without limitation, the Concho Holdings Companies’ Oil and Gas Interests, and the Concho Holding Companies’ respective ownership interests in the Concho Holdings Companies’ Oil and Gas Interests is at least equal to that reflected in the Concho Holdings Reserve Report, (ii) good and marketable title to all other real property owned by them (including pipeline easement

rights) to the extent necessary to carry on their business, and (iii) good and marketable title to all personal property owned by them, in each case free and clear of all Liens, other than Permitted Liens. All Basic Documents of the Concho Holdings Companies pursuant to which the Concho Holdings Companies own, operate or hold any material assets are in full force and effect, and none of the Concho Holdings Companies have received any notice, whether written or oral, of default under any Basic Document of the Concho Holdings Companies or of termination of or intention to terminate any Basic Document of the Concho Holdings Companies and, to Concho Holdings’ knowledge, no event has occurred which (with notice or lapse of time, or both) would constitute a default under any Basic Document of the Concho Holdings Companies or give any of the Concho Holdings Companies or any other party to any Basic Document of the Concho Holdings Companies the right to terminate any Basic Document of the Concho Holdings Companies.

(l) Oil and Gas Interests. All proceeds from the sale of the Concho Holdings Companies’ share of the Hydrocarbons being produced from Concho Holdings Companies’ Properties are currently being paid in full to the Concho Holdings Companies by the purchasers thereof on a timely basis, and none of such proceeds are currently being held in suspense by such purchaser or any other party. No Properties of the Concho Holdings Companies is subject to (or has related to it) any area of mutual interest agreements, non-competition agreements or other similar agreements or any farm-out or farm-in agreement or any other agreements under which any party thereto is entitled to receive assignments not yet made, or could earn additional assignments. No Properties of the Concho Holdings Companies is held pursuant to an arrangement that is subject to (or has not properly elected out of the provisions of) Subchapter K of the Code.

(m) Production Data. Subject to such adjustments as are ordinary and customary in the oil and gas industry, to Concho Holdings’ knowledge, the production and other data furnished by Concho Holdings to Concho Resources and the Sellers in their review of the Concho Holdings Companies’ Properties, and any supplements thereto, is now, and on the Closing Date will be, complete and correct, in all material respects, and production has not decreased other than normal declines in production rates over time, individually, on a property-by-property or well-by-well basis or in the aggregate, from the production information furnished to Concho Resources and the Sellers, except that no representation or warranty is made as to reserve estimates, price projections, values assigned to reserves or other assumptions or projections, interpretive data or geophysical or seismic data included therein.

(n) Gas or Pipeline Imbalances. There are no wellhead or pipeline imbalances as of the Closing Date attributable to the Oil and Gas Interests of the Concho Holdings Companies.

(o) Environmental Matters. Except as set forth herein this Section 3.1(o), none of the Concho Holding Companies make any representation or warranty in this Agreement with respect to the Concho Assets as they relate to any Hazardous Materials or to any alleged compliance with, or potential liability under, any Environmental Law.

1. The Concho Assets and any of the Concho Holding Companies’ businesses with respect thereto and any operations thereof are, and within all applicable statute of limitation periods have been, in material compliance with all applicable Environmental Laws.

2. All material Permits required under applicable Environmental Laws for operating the Concho Assets as they are currently being operated have been obtained and are currently in full force and effect, and none of the Concho Holding Companies has received any written notice that any such existing Permit will be revoked or any pending application for any new Permit or renewal of any existing Permit will be protested or denied.

3. None of the Concho Holding Companies has received any written notice of any claim, suit, investigation, request for information, or proceeding concerning any alleged material violation of, or any potential material liability under, any applicable Environmental Law with respect to the Concho Assets and, to the knowledge of any of the Concho Holding Companies, there are no circumstances that would reasonably be likely to result in the receipt of such notice of claim, suit, investigation, request for information, or proceeding.

4. There has been no Release or disposal of Hazardous Materials in any material respect at, on, under or from any of the Concho Assets.

5. None of the Concho Holding Companies has received any written notice asserting a potential material liability under applicable Environmental Law with respect to the Release or disposal of Hazardous Materials at, under, or from any real properties offsite the Concho Assets where such Hazardous Materials had been transported to or disposed of by or on behalf of any of the Concho Holding Companies.

6. To the knowledge of any of the Concho Holding Companies, there has been no exposure of any Person or property to any Hazardous Materials as a result of or in connection with operation of the Concho Assets that would reasonably be expected to form the basis for a claim for damages or compensation.

7. Each of the Concho Holding Companies has made available to Chase, Caza, and the WI Owners, as requested, copies of all environmental reports, analyses, and correspondence relating to the Concho Assets that are in any of the Concho Holding Companies’ possession or control and relating to alleged material compliance with, or potential material liability under, any applicable Environmental Laws.

(p) Basic Documents. To Concho Holdings’ knowledge:

1. all payments (including all delay rentals, royalties, shut-in royalties and payments and valid calls for payment or prepayment) due under the Basic Documents of the Concho Holdings Companies have been and are being made (timely, and before the same became delinquent) by the Concho Holdings Companies in all material respects, or if such payments have been or are being made by third parties, such payments have been and are being made by such third parties where the non-payment of same by such third party could materially and adversely affect the ownership, exploration, development, operation, maintenance, value or use of any of the Oil and Gas Interests of the Concho Holdings Companies; and

2. no pending or threatened disputes for payments under any joint operating agreements affecting the Oil and Gas Interests of the Concho Holdings Companies exist including, without limitation, outstanding audit exceptions.

For the purposes of the representations contained in this subsection (and without limitation of such representations), the non-payment of an amount, or non-performance of an obligation, where such non-payment, or non-performance, could result in the forfeiture or termination of rights of any of the Concho Holdings Companies under a Basic Document of the Concho Holdings Companies, shall be considered material.

(q) State of Repair. To such Concho Holdings’ knowledge, the properties included in the Oil and Gas Interests of the Concho Holdings Companies have been maintained in a state of repair so as to be reasonably adequate for normal operations.

(r) Certain Agreements. Except for casinghead gas purchase contracts and AFE’s entered into in the normal course of business, there are no agreements, contracts or commitments (including, without limitation, any management, service, consulting, or other similar contract) to which the assets and properties of the Concho Holdings Companies are subject (i) which involve payment of more than $250,000, (ii) which cannot be terminated by the Concho Holdings Companies upon written notice of 60 days or less and without penalty or other obligation, (iii) limiting in any respect the Concho Holdings Companies’ ability to compete with any Person or otherwise conduct business of any line or nature or (iv) solely among the Concho Holdings Companies and any of their affiliate which will survive the Closing. There are no joint venture or general or limited partnership agreements to which any of the Concho Holdings Companies is subject.

(s) Disputes and Inquiries. There are no (i) disputes pending, or, to the knowledge of Concho Holdings, threatened, which involve any of the Concho Holdings Companies and any Person regarding any claim involving an amount in excess of $250,000 or (ii) inquiries or notices from any Governmental Authorities relating to the assets, properties or operations of any of the Concho Holdings Companies.

(t) Brokers. Except for J.P. Morgan Securities Inc., no broker, finder, investment banker or other Person is or will be, in connection with the transactions contemplated by this Agreement, entitled to any brokerage, finder’s or other fee or compensation based on any arrangement or agreement made by or on behalf of any of the Concho Holdings Companies for which any party will have any obligation or liability.

3.2 Representations and Warranties of the Concho Holdings Stockholders. Each of the Concho Holdings Stockholders, severally as to itself and not jointly, hereby represents and warrants to Concho Resources and the Sellers as follows, except as set forth, specifically with reference to a particular section below, on the Concho Holdings Stockholder Disclosure Schedule:

(a) Organization and Good Standing. Such Concho Holdings Stockholder (if such Concho Holdings Stockholders is not a natural Person) is duly organized, validly existing and in good standing under the laws of the jurisdiction in which it is organized;

has the requisite power and authority, and if such Concho Holdings Stockholder is a natural Person, capacity, to own, lease and operate its properties and to conduct its business as it is presently being conducted; and is duly qualified to do business as a foreign entity and is in good standing, in each jurisdiction where the character of the properties owned or leased by it or the nature of its activities makes such qualification necessary (except where any failure to be so qualified or to be in good standing would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on such Concho Holdings Stockholder).

(b) Authority and Enforceability. Such Concho Holdings Stockholder (if such Concho Holdings Stockholder is not a natural Person) has the requisite corporate or other power and authority to enter into and deliver this Agreement and to consummate the transactions contemplated hereby. The execution and delivery by such Concho Holdings Stockholder of this Agreement and the consummation of the transactions contemplated hereby have been duly and validly authorized by all necessary corporate or other action and no other corporate or other proceedings are necessary to consummate the transactions contemplated hereby. This Agreement has been duly and validly executed and delivered and constitutes a valid and binding obligation of such Concho Holdings Stockholder enforceable against such Concho Holdings Stockholder in accordance with its terms, except as such enforceability may be limited by bankruptcy, insolvency, reorganization and similar laws affecting creditors generally and by the availability of equitable remedies.

(c) No Conflict; Required Filings and Consents. The execution and delivery of this Agreement by such Concho Holdings Stockholder do not, and the performance by such Concho Holdings Stockholder of the transactions contemplated hereby or thereby will not violate, conflict with, require any consent under or result in a violation or breach of, or constitute a default (with or without due notice or lapse of time or both) under, or give any party the right to terminate or accelerate any obligation, or give rise to the creation of any Lien upon any Concho Holdings Equity Interest under, any of the terms, conditions, or provisions of any organizational document, contract or other instrument or obligation to which such Concho Holdings Stockholder is a party or by which it may be bound, or violate any order, writ, judgment, injunction, decree, statute, law, rule, or regulation of any Governmental Authority binding upon such Concho Holdings Stockholder. No consent of or registration, declaration, or filing with any Governmental Authority is required by or with respect to such Concho Holdings Stockholder in connection with the execution and delivery of this Agreement by such Concho Holdings Stockholder or the consummation of the transactions contemplated hereby.

(d) Ownership. Such Concho Holdings Stockholder is the holder of record of and owns beneficially the Concho Holdings Equity Interests identified as being owned by such Concho Holdings Stockholder in Schedule 3.1(f) of the Concho Holdings Disclosure Schedule and to be acquired by Concho Resources in accordance with Section 2.1 hereof, and, as of the Closing Date, such Concho Holdings Stockholder will be the holder of record and will own beneficially the Concho Holdings Equity Interests, free and clear of all Liens. On the Closing Date, Concho Resources will receive good and valid title to the Concho Holdings Equity Interests owned by such Concho Holdings Stockholder, free and clear of all Liens.

(e) Accredited Investor. Such Concho Holdings Stockholder is an “accredited investor” within the meaning of Regulation D, Rule 501(a), promulgated by the Commission.

(f) Restricted Securities. Such Concho Holdings Stockholder understands that the shares of Concho Resources Common Stock will not have been registered pursuant to the Securities Act or any applicable state securities laws, that the shares of Concho Resources Common Stock will be characterized as “restricted securities” under federal securities laws, and that under such laws and applicable regulations the shares of Concho Resources Common Stock cannot be sold or otherwise disposed of without registration under the Securities Act or an exemption therefrom. In this connection, such Concho Holdings Stockholder represents that it is familiar with Rule 144 promulgated under the Securities Act, as currently in effect, and understands the resale limitations imposed thereby and by the Securities Act. A legend indicating that the shares of Concho Resources Common Stock have not been registered under applicable federal and state securities laws and referring to the restrictions on transferability and sale of the Concho Resources Common Stock pursuant to this Agreement or otherwise may be placed on any certificate(s) or other document delivered to such Concho Holdings Stockholder or any substitute therefor and any transfer agent of Concho Resources may be instructed to require compliance therewith.

(g) Investment Intent. The Concho Resources Common Stock is being acquired for such Concho Holdings Stockholder’s own investment portfolio and account (and not on behalf of, and without the participation of, any other Person) with the intent of holding the Concho Resources Common Stock for investment and without the intent of participating, directly or indirectly, in a distribution of the Concho Resources Common Stock and not with a view to, or for resale in connection with, any distribution of the Concho Resources Common Stock in violation of applicable securities laws or any portion thereof in violation of applicable securities laws. As of the Closing Date, no Concho Holdings Stockholder has plans to transfer any of the Concho Resources Common Stock on a specified date or to a specified person, other than in connection with the IPO.

3.3 Representations and Warranties of Chase. Chase hereby represents and warrants to Concho Resources and the Concho Holdings Stockholders as follows, except as set forth, specifically with reference to a particular section below, on the Chase Disclosure Schedule:

(a) Organization. Chase is a corporation duly organized, validly existing and in good standing under the laws of the State of New Mexico; has the requisite power and authority to own, lease and operate its properties and to conduct its business as it is presently being conducted; and is duly qualified to do business as a foreign corporation and is in good standing, in each jurisdiction where the character of the properties owned or leased by it or the nature of its activities makes such qualification necessary (except where any failure to be so qualified or to be in good standing would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on the Assets).

(b) Authority and Enforceability. Chase has the requisite corporate power and authority to enter into and deliver this Agreement and to consummate the transactions contemplated hereby. The execution and delivery by Chase of this Agreement and the consummation of the transactions contemplated hereby have been duly and validly authorized by all necessary corporate action, including approval by the board of directors and stockholders of Chase, and no other corporate proceedings are necessary to consummate the transactions contemplated hereby. This Agreement has been duly and validly executed and delivered and constitutes a valid and binding obligation of Chase enforceable against it in accordance with its terms, except as such enforceability may be limited by bankruptcy, insolvency, reorganization and similar laws affecting creditors generally and by the availability of equitable remedies.

(c) No Violations. The execution and delivery of this Agreement and the consummation of the transactions contemplated hereby will not, conflict with, result in any violation of or default (with or without notice or lapse of time or both) under, give rise to a right of termination, cancellation or acceleration of any obligation or to the loss of a material benefit under, or result in the creation of any Lien on any of the properties or assets of Chase under, any provision of: (i) the certificate of incorporation, bylaws or any other organizational documents of Chase; (ii) any agreement including any loan or credit agreement, note, bond, mortgage, indenture, lease, permit, concession, franchise, license or other agreement or instrument applicable to Chase or by which any of its assets or properties may be bound; or (iii) any judgment, order, decree, statute, law, ordinance, rule or regulation applicable to Chase or any of its properties or assets, other than, in the case of clause (ii) or (iii) above, any such conflict, violation, default, right, loss or Lien that, individually or in the aggregate, would not reasonably be expected to have a Material Adverse Effect on the Assets.

(d) No Consents. No consent, approval, order or authorization of, registration, declaration or filing with, or permit from, any Governmental Authority is required by or with respect to Chase in connection with the execution and delivery by Chase of this Agreement or the consummation by Chase of the transactions contemplated hereby. No Third-Party Consent is required by or with respect to Chase in connection with the execution and delivery by it of this Agreement or the consummation by it of the transactions contemplated hereby, except for any such Third-Party Consent which the failure to obtain would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on the Assets.

(e) Financial Statements. Chase has delivered to Concho Resources copies of the financial statements listed on Schedule 3.3(e) of the Chase Disclosure Schedule (such financial statements collectively being referred to as the “Chase Financial Statements”). The Chase Financial Statements, including the notes thereto, if any, fairly present in all material respects the financial position of Chase at the dates thereof and the results of the operations of Chase for the periods indicated. There is no liability or obligation of any kind, whether accrued, absolute, fixed, contingent, or otherwise, of Chase other than (i) liabilities adequately reflected or reserved against in the Chase Balance Sheet (or expressly identified in the notes to the Chase Financial Statements), (ii) liabilities incurred in the ordinary course of business consistent with past practice since September 30, 2005, or (iii) any such liabilities which, individually or in aggregate (A) would not

reasonably be expected to have a Material Adverse Effect on Chase, taken as a whole and (B) do not in any case exceed $1,000,000 in the aggregate (provided that this clause (B) shall not constitute evidence of whether a liability, obligation or other fact, event or occurrence shall constitute a Material Adverse Effect).

(f) Capital Structure. There are no Equity Interest Equivalents or other contracts of any character to which Chase is a party or by which it is bound obligating Chase to issue, deliver, or sell, or cause to be, issued, delivered or sold, additional Equity Interests of Chase. There are no outstanding obligations of Chase to repurchase, redeem, or otherwise acquire any Equity Interests of Chase. Schedule 3.3(f) of the Chase Disclosure Schedule identifies as of the date of this Agreement the record and beneficial owner, if different, of the issued and outstanding Chase Equity Interests.

(g) Violations; Defaults; Permits. Chase is not in violation of, or in default in any material respect under, and no event has occurred that (with notice or the lapse of time or both) would constitute a violation of or default under (i) its certificate of incorporation, bylaws or other organizational documents, (ii) any applicable law, rule, regulation, ordinance, order, writ, decree or judgment of any Governmental Authority, or (iii) any agreement of Chase, except (in the case of clause (ii) or (iii) above) for any violation or default that would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on the Assets. Chase has obtained and holds all permits, licenses, variances, exemptions, orders, franchises, approvals and authorizations of all Persons necessary for the lawful conduct of its business and the lawful ownership, use and operation of the Chase Assets, except for such permits, licenses, variances, exemptions, orders, franchises, approvals and authorizations which the failure to obtain or hold would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on the Assets.

(h) Litigation. No litigation, arbitration, investigation or other proceeding of any Person is pending or, to the knowledge of Chase, threatened against Chase or the Chase Assets, nor to the knowledge of Chase are there any facts or circumstances existing which could reasonably give rise to any such litigation, arbitration, investigation or other proceeding. Neither Chase nor the Chase Assets is subject to any outstanding injunction, judgment, order, decree, settlement agreement, conciliation agreement, letter of commitment, deficiency letter or ruling (other than routine oil and gas field regulatory orders).

(i) Title to Assets. Chase has (i) good and defensible title to the Chase Assets, including without limitation, Chase’s Oil and Gas Interests, and Chase’s ownership interest in Chase’s Oil and Gas Interests, together with the Oil and Gas Interests of the other Sellers, is at least equal to that reflected in the Sellers Reserve Report, (ii) good and marketable title to all other real property owned by it and included in the Chase Assets (including pipeline easement rights) to the extent necessary to carry on its business as it relates to the Chase Assets, and (iii) good and marketable title to all personal property owned by it and included in the Chase Assets, in each case free and clear of all Liens, other than Permitted Liens. All Basic Documents of Chase pursuant to which Chase owns, operates or holds any of the Assets are in full force and effect, and Chase has not received any notice, whether written or oral, of default under any Basic

Document of Chase or of termination of or intention to terminate any Basic Document of Chase and, to its knowledge, no event has occurred which (with notice or lapse of time, or both) would constitute a default under any Basic Document of Chase or give Chase or any other party to any Basic Document of Chase the right to terminate any Basic Document of Chase.

(j) Oil and Gas Interests. All proceeds from the sale of Chase’s share of the Hydrocarbons being produced from the Properties included in the Chase Assets are currently being paid in full to Chase by the purchasers thereof on a timely basis, and none of such proceeds are currently being held in suspense by such purchaser or any other party. No Properties included in the Chase Assets is subject to (or has related to it) any area of mutual interest agreements, non-competition agreements or other similar agreements or any farm-out or farm-in agreement or any other agreements under which any party thereto is entitled to receive assignments not yet made, or could earn additional assignments after the Effective Date. No Properties included in the Chase Assets is held pursuant to an arrangement that is subject to (or has not properly elected out of the provisions of) Subchapter K of the Code.

(k) Production Data. Subject to such adjustments as are ordinary and customary in the oil and gas industry, to Chase’s knowledge, the production and other data furnished by Chase to Concho Resources and to Concho Holdings in their review of their Properties included in the Chase Assets, and any supplements thereto, are what is reflected in the books and records of Chase. Notwithstanding the foregoing, no representation or warranty is made as to reserve estimates, price projections, values assigned to reserves or other assumptions or projections, interpretive data or geophysical or seismic data included therein.

(l) Gas or Pipeline Imbalances. There are no wellhead or pipeline imbalances in excess of 10 MMcf, in the aggregate, as of the Closing Date attributable to the Oil and Gas Interests included in the Chase Assets.

(m) Environmental Matters. Except as set forth herein this Section 3.3(m), Chase does not make any representation or warranty in this Agreement with respect to the Chase Assets as they relate to any Hazardous Materials or to any alleged compliance with, or potential liability under, any Environmental Law.

1. The Chase Assets and Chase’s business with respect thereto and its operation thereof are, and within all applicable statute of limitation periods have been, in material compliance with all applicable Environmental Laws.

2. All material Permits required under applicable Environmental Laws for operating the Chase Assets as they are currently being operated have been obtained and are currently in full force and effect, and Chase has not received any written notice that any such existing Permit will be revoked or any pending application for any new Permit or renewal of any existing Permit will be protested or denied.

3. Chase has not received any written notice of any claim, suit, investigation, request for information, or proceeding concerning any alleged material violation of, or any

potential material liability under, any applicable Environmental Law with respect to the Chase Assets and, to the knowledge of Chase, there are no circumstances that would reasonably be likely to result in the receipt of such notice of claim, suit, investigation, request for information, or proceeding.

4. There has been no Release or disposal of Hazardous Materials in any material respect at, on, under or from any of the Chase Assets.

5. Chase has not received any written notice asserting a potential material liability under applicable Environmental Law with respect to the Release or disposal of Hazardous Materials at, under, or from any real properties offsite the Chase Assets where such Hazardous Materials had been transported to or disposed of by or on behalf of Chase.

6. To the knowledge of Chase, there has been no exposure of any Person or property to any Hazardous Materials as a result of or in connection with operation of the Chase Assets that would reasonably be expected to form the basis for a claim for damages or compensation.

7. Chase has made available to Concho Holding Companies, Caza, and the WI Owners copies, as requested, of all environmental reports, analyses, and correspondence relating to the Chase Assets that are in Chase’s possession or control and relating to alleged material compliance with, or potential material liability under, any applicable Environmental Laws.

(n) Basic Documents. To Chase’s knowledge:

1. all payments (including all delay rentals, royalties, shut-in royalties and payments and valid calls for payment or prepayment) due under the Basic Documents of Chase have been and are being made (timely, and before the same became delinquent) by Chase in all material respects, or if such payments have been or are being made by third parties, such payments have been and are being made by such third parties where the non-payment of same by such third party could materially and adversely affect the ownership, exploration, development, operation, maintenance, value or use of any of the Oil and Gas Interests of Chase after the Effective Date, and

2. no pending or threatened disputes for payments under any joint operating agreements affecting the Oil and Gas Interests exist including, without limitation, outstanding audit exceptions.

For the purposes of the representations contained in this subsection (and without limitation of such representations), the non-payment of an amount, or non-performance of an obligation, where such non-payment, or non-performance, could result in the forfeiture or termination of rights of Chase under a Basic Document of Chase, shall be considered material.

(o) Preferential Rights and Consents to Assign. Except for consents to assignment required from Governmental Authorities in connection with the sale or conveyance of oil and gas properties if the same are customarily obtained subsequent to such sale or conveyance without penalty and, to Chase’s knowledge, there are no

consents to assignment or waivers of preferential rights to purchase that must be obtained from any Person in order for Chase to consummate the transactions contemplated by this Agreement without violating or breaching a duty or obligation of Chase.

(p) State of Repair. To the Chase’s knowledge, the properties in the Oil and Gas Interests included in the Chase Assets have been maintained in a state of repair so as to be reasonably adequate for normal operations.

(q) Certain Agreements. Except for casinghead gas purchase contracts and AFE’s entered into in the normal course of business, there are no agreements, contracts or commitments (including, without limitation, any management, service, consulting, or other similar contract) to which the Chase Assets are subject (i) which involve payment of more than $250,000, (ii) which cannot be terminated by Chase upon written notice of 60 days or less and without penalty or other obligation, (iii) limiting in any respect Chase’s ability to compete with any Person or otherwise conduct business of any line or nature or (iv) solely among Chase and any of its affiliates which will survive the Closing. There are no joint venture or general or limited partnership agreements to which the Chase Assets are subject.

(r) Disputes and Inquiries. There are no (i) disputes pending, or, to the knowledge of Chase, threatened, which involve Chase or the Chase Assets and any Person regarding any claim involving an amount in excess of $250,000 or (ii) inquiries or notices from any Governmental Authorities relating to the Chase Assets.

(s) Brokers. No broker, finder, investment banker or other Person is or will be, in connection with the transactions contemplated by this Agreement, entitled to any brokerage, finder’s or other fee or compensation based on any arrangement or agreement made by or on behalf of Chase for which any party will have any obligation or liability.

(t) Accredited Investor. Chase is an “accredited investor” within the meaning of Regulation D, Rule 501(a), promulgated by the Commission.

(u) Restricted Securities. Chase understands that the shares of Concho Resources Common Stock will not have been registered pursuant to the Securities Act or any applicable state securities laws, that the shares of Concho Resources Common Stock will be characterized as “restricted securities” under federal securities laws, and that under such laws and applicable regulations the shares of Concho Resources Common Stock cannot be sold or otherwise disposed of without registration under the Securities Act or an exemption therefrom. In this connection, Chase represents that it is familiar with Rule 144 promulgated under the Securities Act, as currently in effect, and understands the resale limitations imposed thereby and by the Securities Act. A legend indicating that the shares of Concho Resources Common Stock have not been registered under applicable federal and state securities laws and referring to the restrictions on transferability and sale of the Concho Resources Common Stock pursuant to this Agreement or otherwise may be placed on any certificate(s) or other document delivered to Chase or any substitute therefor and any transfer agent of Concho Resources may be instructed to require compliance therewith.

(v) Investment Intent. The Concho Resources Common Stock is being acquired for the investment portfolio and account of Chase and its Affiliates (and not on behalf of, and without the participation of, any other Person) with the intent of holding the Concho Resources Common Stock for investment and without the intent of participating, directly or indirectly, in a distribution of the Concho Resources Common Stock and not with a view to, or for resale in connection with, any distribution of the Concho Resources Common Stock in violation of applicable securities laws or any portion thereof in violation of applicable securities laws. As of the Closing Date, Chase has no plans to transfer any of the Concho Resources Common Stock on a specified date or to a specified person other than to its Affiliates or in connection with the IPO.

3.4 Representations and Warranties of Caza. Caza hereby represents and warrants to Concho Resources and the Concho Holdings Stockholders as follows, except as set forth, specifically with reference to a particular section below, on the Caza Disclosure Schedule:

(a) Organization. Caza is a limited liability company duly organized, validly existing and in good standing under the laws of the State of New Mexico; has the requisite power and authority to own, lease and operate its properties and to conduct its business as it is presently being conducted; and is duly qualified to do business as a foreign limited liability company and is in good standing, in each jurisdiction where the character of the properties owned or leased by it or the nature of its activities makes such qualification necessary (except where any failure to be so qualified or to be in good standing would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on the Assets).

(b) Authority and Enforceability. Caza has the requisite limited liability company power and authority to enter into and deliver this Agreement and to consummate the transactions contemplated hereby. The execution and delivery by Caza of this Agreement and the consummation of the transactions contemplated hereby have been duly and validly authorized by all necessary limited liability company action, including approval by the managers and members of Caza, and no other proceedings are necessary to consummate the transactions contemplated hereby. This Agreement has been duly and validly executed and delivered and constitutes a valid and binding obligation of Caza enforceable against it in accordance with its terms, except as such enforceability may be limited by bankruptcy, insolvency, reorganization and similar laws affecting creditors generally and by the availability of equitable remedies.

(c) No Violations. The execution and delivery of this Agreement and the consummation of the transactions contemplated hereby will not, conflict with, result in any violation of or default (with or without notice or lapse of time or both) under, give rise to a right of termination, cancellation or acceleration of any obligation or to the loss of a material benefit under, or result in the creation of any Lien on any of the properties or assets of Caza under, any provision of: (i) the certificate of incorporation, bylaws or any other organizational documents of Caza; (ii) any agreement including any loan or credit agreement, note, bond, mortgage, indenture, lease, permit, concession, franchise, license or other agreement or instrument applicable to Caza or by which any of its assets or properties may be bound; or (iii) any judgment, order, decree, statute, law, ordinance, rule or regulation applicable to Caza or any of its properties or assets, other than, in the

case of clause (ii) or (iii) above, any such conflict, violation, default, right, loss or Lien that, individually or in the aggregate, would not reasonably be expected to have a Material Adverse Effect on the Assets.

(d) No Consents. No consent, approval, order or authorization of, registration, declaration or filing with, or permit from, any Governmental Authority is required by or with respect to Caza in connection with the execution and delivery by Caza of this Agreement or the consummation by Caza of the transactions contemplated hereby. No Third-Party Consent is required by or with respect to Caza in connection with the execution and delivery by it of this Agreement or the consummation by it of the transactions contemplated hereby, except for any such Third-Party Consent which the failure to obtain would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on the Assets.

(e) Financial Statements. Caza has delivered to Concho Resources copies of the financial statements listed on Schedule 3.4(e) of the Caza Disclosure Schedule (such financial statements collectively being referred to as the “Caza Financial Statements”). The Caza Financial Statements, including the notes thereto, fairly present in all material respects the financial position of Caza at the dates thereof and the results of the operations of Caza for the periods indicated. There is no liability or obligation of any kind, whether accrued, absolute, fixed, contingent, or otherwise, of Caza other than (i) liabilities adequately reflected or reserved against in the Caza Balance Sheet (or expressly identified in the notes to the Caza Financial Statements), (ii) liabilities incurred in the ordinary course of business consistent with past practice since September 30, 2005, or (iii) any such liabilities which, individually or in aggregate (A) would not reasonably be expected to have a Material Adverse Effect on Caza, taken as a whole and (B) do not in any case exceed $1,000,000 in the aggregate (provided that this clause (B) shall not constitute evidence of whether a liability, obligation or other fact, event or occurrence shall constitute a Material Adverse Effect).

(f) Violations; Defaults; Permits. Caza is not in violation of, or in default in any material respect under, and no event has occurred that (with notice or the lapse of time or both) would constitute a violation of or default under (i) its certificate of formation, operating agreement or other organizational documents, (ii) any applicable law, rule, regulation, ordinance, order, writ, decree or judgment of any Governmental Authority, or (iii) any agreement of Caza, except (in the case of clause (ii) or (iii) above) for any violation or default that would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on the Assets. Caza has obtained and holds all permits, licenses, variances, exemptions, orders, franchises, approvals and authorizations of all Persons necessary for the lawful conduct of its business and the lawful ownership, use and operation of the Caza Assets, except for such permits, licenses, variances, exemptions, orders, franchises, approvals and authorizations which the failure to obtain or hold would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on the Assets.

(g) Litigation. No litigation, arbitration, investigation or other proceeding of any Person is pending or, to the knowledge of Caza, threatened against Caza or the Caza Assets, nor to the knowledge of Caza are there any facts or circumstances existing which

could reasonably give rise to any such litigation, arbitration, investigation or other proceeding. Neither Caza nor the Caza Assets is subject to any outstanding injunction, judgment, order, decree, settlement agreement, conciliation agreement, letter of commitment, deficiency letter or ruling (other than routine oil and gas field regulatory orders).

(h) Title to Assets. Caza has (i) good and defensible title to the Caza Assets, including without limitation, Caza’s Oil and Gas Interests, and Caza’s ownership interest in Caza’s Oil and Gas Interests, together with the Oil and Gas Interests of the other Sellers, is at least equal to that reflected in the Sellers Reserve Report, (ii) good and marketable title to all other real property owned by it and included in the Caza Assets (including pipeline easement rights) to the extent necessary to carry on its business as it relates to the Caza Assets, and (iii) good and marketable title to all personal property owned by it and included in the Caza Assets, in each case free and clear of all Liens, other than Permitted Liens. All Basic Documents of Caza pursuant to which Caza owns, operates or holds any of the Assets are in full force and effect, and Caza has not received any notice, whether written or oral, of default under any Basic Document of Caza or of termination of or intention to terminate any Basic Document of Caza and, to its knowledge, no event has occurred which (with notice or lapse of time, or both) would constitute a default under any Basic Document of Caza or give Caza or any other party to any Basic Document of Caza the right to terminate any Basic Document of Caza .

(i) Oil and Gas Interests. All proceeds from the sale of Caza’s share of the Hydrocarbons being produced from the Properties included in the Caza Assets are currently being paid in full to Caza by the purchasers thereof on a timely basis, and none of such proceeds are currently being held in suspense by such purchaser or any other party. No Properties included in the Caza Assets is subject to (or has related to it) any area of mutual interest agreements, non-competition agreements or other similar agreements or any farm-out or farm-in agreement or any other agreements under which any party thereto is entitled to receive assignments not yet made, or could earn additional assignments after the Effective Date. No Properties included in the Caza Assets is held pursuant to an arrangement that is subject to (or has not properly elected out of the provisions of) Subchapter K of the Code.

(j) Production Data. Subject to such adjustments as are ordinary and customary in the oil and gas industry, to Caza’s knowledge, the production and other data furnished by Caza to Concho Resources and Concho Holdings in their review of the Properties included in the Caza Assets, and any supplements thereto, are what is reflected in the books and records of Caza. Notwithstanding the foregoing, no representation or warranty is made as to reserve estimates, price projections, values assigned to reserves or other assumptions or projections, interpretive data or geophysical or seismic data included therein.

(k) Gas or Pipeline Imbalances. There are no wellhead or pipeline imbalances in excess of 10 MMcf, in the aggregate, as of the Closing Date attributable to the Oil and Gas Interests included in the Caza Assets.

(l) Environmental Matters. Except as set forth herein this Section 3.4(l), Caza does not make any representation or warranty in this Agreement with respect to the Caza Assets as they relate to any Hazardous Materials or to any alleged compliance with, or potential liability under, any Environmental Law.

1. The Caza Assets and Caza’s business with respect thereto and its operation thereof are, and within all applicable statute of limitation periods have been, in material compliance with all applicable Environmental Laws.

2. All material Permits required under applicable Environmental Laws for operating the Caza Assets as they are currently being operated have been obtained and are currently in full force and effect, and Caza has not received any written notice that any such existing Permit will be revoked or any pending application for any new Permit or renewal of any existing Permit will be protested or denied.

3. Caza has not received any written notice of any claim, suit, investigation, request for information, or proceeding concerning any alleged material violation of, or any potential material liability under, any applicable Environmental Law with respect to the Caza Assets and, to the knowledge of Caza, there are no circumstances that would reasonably be likely to result in the receipt of such notice of claim, suit, investigation, request for information, or proceeding.

4. There has been no Release or disposal of Hazardous Materials in any material respect at, on, under or from any of the Caza Assets.

5. Caza has not received any written notice asserting a potential material liability under applicable Environmental Law with respect to the Release or disposal of Hazardous Materials at, under, or from any real properties offsite the Caza Assets where such Hazardous Materials had been transported to or disposed of by or on behalf of Caza.

6. To the knowledge of Caza, there has been no exposure of any Person or property to any Hazardous Materials as a result of or in connection with operation of the Caza Assets that would reasonably be expected to form the basis for a claim for damages or compensation.

7. Caza has made available to Concho Holding Companies, Chase, and the WI Owners, as requested, copies of all environmental reports, analyses, and correspondence relating to the Caza Assets that are in Caza’s possession or control and relating to alleged material compliance with, or potential material liability under, any applicable Environmental Laws.

(m) Basic Documents. To Caza’s knowledge:

1. all payments (including all delay rentals, royalties, shut-in royalties and payments and valid calls for payment or prepayment) due under the Basic Documents of Caza have been and are being made (timely, and before the same became delinquent) by Caza in all material respects, or if such payments have been or are being made by third parties, such payments have been and are being made by such third parties where the non-payment of same by such third party could materially and adversely affect

the ownership, exploration, development, operation, maintenance, value or use of any of the Oil and Gas Interests of Caza after the Effective Date; and

2. no pending or threatened disputes for payments under any joint operating agreements affecting the Oil and Gas Interests of Caza exist including, without limitation, outstanding audit exceptions.

For the purposes of the representations contained in this subsection (and without limitation of such representations), the non-payment of an amount, or non-performance of an obligation, where such non-payment, or non-performance, could result in the forfeiture or termination of rights of Caza under a Basic Document of Caza, shall be considered material.

(n) Preferential Rights and Consents to Assign. Except for consents to assignment required from Governmental Authorities in connection with the sale or conveyance of oil and gas properties if the same are customarily obtained subsequent to such sale or conveyance without penalty, to Caza’s knowledge, there are no consents to assignment or waivers of preferential rights to purchase that must be obtained from third parties in order for Caza to consummate the transactions contemplated by this Agreement without violating or breaching a duty or obligation of Caza.

(o) State of Repair. To Caza’s knowledge, the properties in the Oil and Gas Interests included in the Caza Assets have been maintained in a state of repair so as to be reasonably adequate for normal operations.

(p) Certain Agreements. Except for casinghead gas purchase contracts and AFE’s entered into in the normal course of business, there are no agreements, contracts or commitments (including, without limitation, any management, service, consulting, or other similar contract) to which the Caza Assets are subject (i) which involve payment of more than $250,000, (ii) which cannot be terminated by Chase upon written notice of 60 days or less and without penalty or other obligation, (iii) limiting in any respect the Caza’s ability to compete with any Person or otherwise conduct business of any line or nature or (iv) solely among Caza and any of its affiliates which will survive the Closing. There are no joint venture or general or limited partnership agreements to which the Caza Assets are subject.

(q) Disputes and Inquiries. There are no (i) disputes pending, or, to the knowledge of Caza, threatened, which involve Caza or the Caza Assets and any Person regarding any claim involving an amount in excess of $250,000 or (ii) inquiries or notices from any Governmental Authorities relating to the Caza Assets.

(r) Brokers. No broker, finder, investment banker or other Person is or will be, in connection with the transactions contemplated by this Agreement, entitled to any brokerage, finder’s or other fee or compensation based on any arrangement or agreement made by or on behalf of Caza and for which any party will have any obligation or liability.

(s) Accredited Investor. Caza is an “accredited investor” within the meaning of Regulation D, Rule 501(a), promulgated by the Commission.

(t) Restricted Securities. Caza understands that the shares of Concho Resources Common Stock will not have been registered pursuant to the Securities Act or any applicable state securities laws, that the shares of Concho Resources Common Stock will be characterized as “restricted securities” under federal securities laws, and that under such laws and applicable regulations the shares of Concho Resources Common Stock cannot be sold or otherwise disposed of without registration under the Securities Act or an exemption therefrom. In this connection, Caza represents that it is familiar with Rule 144 promulgated under the Securities Act, as currently in effect, and understands the resale limitations imposed thereby and by the Securities Act. A legend indicating that the shares of Concho Resources Common Stock have not been registered under applicable federal and state securities laws and referring to the restrictions on transferability and sale of the Concho Resources Common Stock pursuant to this Agreement or otherwise may be placed on any certificate(s) or other document delivered to Caza or any substitute therefor and any transfer agent of Concho Resources may be instructed to require compliance therewith.

(u) Investment Intent. The Concho Resources Common Stock is being acquired for the investment portfolio and account of Caza and its Affiliates (and not on behalf of, and without the participation of, any other Person) with the intent of holding the Concho Resources Common Stock for investment and without the intent of participating, directly or indirectly, in a distribution of the Concho Resources Common Stock and not with a view to, or for resale in connection with, any distribution of the Concho Resources Common Stock in violation of applicable securities laws or any portion thereof in violation of applicable securities laws. As of the Closing Date, Caza has no plans to transfer any of the Concho Resources Common Stock on a specified date or to a specified person other than to its Affiliates or in connection with the IPO.

3.5 Representations and Warranties of WI Owners. Each of the WI Owners, severally and not jointly, hereby represents and warrants to Concho Resources and the Concho Holdings Stockholders as follows:

(a) Organization and Good Standing. Such WI Owner (if such WI Owner is not a natural Person) is duly organized, validly existing and in good standing under the laws of the jurisdiction in which it is organized; has the requisite power and authority, and if such WI Owner is a natural Person, capacity, to own, lease and operate its properties and to conduct its business as it is presently being conducted; and is duly qualified to do business as a foreign entity and is in good standing, in each jurisdiction where the character of the properties owned or leased by it or the nature of its activities makes such qualification necessary (except where any failure to be so qualified or to be in good standing would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on the Assets).

(b) Authority and Enforceability. Such WI Owner (if such WI Owner is not a natural Person) has the requisite corporate or other power and authority to enter into and deliver this Agreement and to consummate the transactions contemplated hereby. The execution and delivery by such WI Owner of this Agreement and the consummation of the transactions contemplated hereby have been duly and validly authorized by all necessary corporate or other action and no other corporate or other proceedings are

necessary to consummate the transactions contemplated hereby. This Agreement has been duly and validly executed and delivered and constitutes a valid and binding obligation of such WI Owner enforceable against such WI Owner in accordance with its terms, except as such enforceability may be limited by bankruptcy, insolvency, reorganization and similar laws affecting creditors generally and by the availability of equitable remedies.

(c) No Violations. The execution and delivery of this Agreement and the consummation of the transactions contemplated hereby will not, conflict with, result in any violation of or default (with or without notice or lapse of time or both) under, give rise to a right of termination, cancellation or acceleration of any obligation or to the loss of a material benefit under, or result in the creation of any Lien on any of the properties or assets of such WI Owner under, any provision of: (i) if such WI Owner is not a natural person, the certificate of incorporation, bylaws or any other organizational documents of such WI Owner; (ii) any agreement including any loan or credit agreement, note, bond, mortgage, indenture, lease, permit, concession, franchise, license or other agreement or instrument applicable to such WI Owner or by which any of such WI Owner’s assets or properties may be bound; or (iii) any judgment, order, decree, statute, law, ordinance, rule or regulation applicable to such WI Owner or any of such WI Owner’s properties or assets, other than, in the case of clause (ii) or (iii) above, any such conflict, violation, default, right, loss or Lien that, individually or in the aggregate, would not reasonably be expected to have a Material Adverse Effect on the Assets.

(d) No Consents. No consent, approval, order or authorization of, registration, declaration or filing with, or permit from, any Governmental Authority is required by or with respect to such WI Owner in connection with the execution and delivery by such WI Owner of this Agreement or the consummation by such WI Owner of the transactions contemplated hereby. No Third-Party Consent is required by or with respect to such WI Owner in connection with the execution and delivery by it of this Agreement or the consummation by it of the transactions contemplated hereby, except for any such Third-Party Consent which the failure to obtain would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on the Assets.

(e) Violations; Defaults; Permits. Such WI Owner is not in violation of, or in default in any material respect under, and no event has occurred that (with notice or the lapse of time or both) would constitute a violation of or default under (i) its certificate of incorporation, bylaws or other organizational documents, (ii) any applicable law, rule, regulation, ordinance, order, writ, decree or judgment of any Governmental Authority, or (iii) any agreement of such WI Owner, except (in the case of clause (ii) or (iii) above) for any violation or default that would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on the Assets. Such WI Owner has obtained and holds all permits, licenses, variances, exemptions, orders, franchises, approvals and authorizations of all Persons necessary for the lawful conduct of its business and the lawful ownership, use and operation of its business, including, without limitation, the WI Assets of such WI Owner, except for such permits, licenses, variances, exemptions, orders, franchises, approvals and authorizations which the failure to obtain or hold would not, individually or in the aggregate, reasonably be expected to have a Material Adverse Effect on the Assets.

(f) Litigation. No litigation, arbitration, investigation or other proceeding of any Person is pending or, to the knowledge of such WI Owner, threatened against the WI Assets of such WI Owner, nor to the knowledge of such WI Owner are there any facts or circumstances existing which could reasonably give rise to any such litigation, arbitration, investigation or proceeding. The WI Assets of such WI Owner is not subject to any outstanding injunction, judgment, order, decree, settlement agreement, conciliation agreement, letter of commitment, deficiency letter or ruling (other than routine oil and gas field regulatory orders).

(g) Title to Assets. Such WI Owner has (i) good and defensible title to the WI Assets of such WI Owner, including without limitation, such WI Owner’s Oil and Gas Interests, and such WI Owner’s ownership interest in such WI Owner’s Oil and Gas Interests, together with the Oil and Gas Interests of the other Sellers, is at least equal to that reflected in the Sellers Reserve Report, (ii) good and marketable title to all other real property included in the WI Assets owned by such WI Owner (including pipeline easement rights) to the extent necessary to carry on its business, and (iii) good and marketable title to all personal property owned by such WI Owner and included in the WI Assets owned by such WI Owner, in each case free and clear of all Liens, other than Permitted Liens. All Basic Documents of such WI Owner pursuant to which such WI Owner owns, operates or holds any of the Assets are in full force and effect, and such WI Owner has not received any notice, whether written or oral, of a default under any Basic Document of such WI Owner or termination of, or intention to terminate, any Basic Document of such WI Owner and, to its knowledge, no event has occurred which (with notice or lapse of time, or both), would constitute a default under any Basic Document of such WI Owner or give such WI Owner or any other party to any Basic Document of such WI Owner the right to terminate any Basic Document of such WI Owner.

(h) Oil and Gas Interests. All proceeds from the sale of such WI Owner’s share of the Hydrocarbons being produced from Properties included in such WI Owner’s portion of the WI Assets are currently being paid in full to such WI Owner by the purchasers thereof on a timely basis, and none of such proceeds are currently being held in suspense by such purchaser or any other party. No Properties included in such WI Owner’s portion of the WI Assets is subject to (or has related to it) any area of mutual interest agreements, non-competition agreements or other similar agreements or any farm-out or farm-in agreement or any other agreements under which any party thereto is entitled to receive assignments not yet made, or could earn additional assignments after the Effective Date. No Properties included in such WI Owner’s portion of the WI Assets is subject to (or has related to it) any tax partnership.

(i) Environmental Matters. Except as set forth herein this Section 3.5(i), none of the WI Owners make any representation or warranty in this Agreement with respect to the WI Assets as they relate to any Hazardous Materials or to any alleged compliance with, or potential liability under, any Environmental Law.

1. Such WI Owner has not received any written notice of any claim, suit, investigation, request for information, or proceeding concerning any alleged material violation of, or any potential material liability under, any applicable Environmental Law with respect to such WI Owner’s portion of the WI Assets and, to the knowledge of such WI Owner, there are

no circumstances that would reasonably be likely to result in the receipt of such notice of claim, suit, investigation, request for information, or proceeding.

2. Such WI Owner has not received any written notice asserting a potential material liability under applicable Environmental Law with respect to the release or disposal of Hazardous Materials at, under, or from any real properties offsite such WI Owner’s portion of the WI Assets where such Hazardous Materials had been transported to or disposed of by or on behalf of such WI Owner.

3. To the knowledge of such WI Owner, there has been no exposure of any Person or property to any Hazardous Materials as a result of or in connection with operation of such WI Owner’s portion of the WI Assets that would reasonably be expected to form the basis for a claim for damages or compensation.

(j) Brokers. No broker, finder, investment banker or other Person is or will be, in connection with the transactions contemplated by this Agreement, entitled to any brokerage, finder’s or other fee or compensation based on any arrangement or agreement made by or on behalf of such WI Owner and for which any party will have any obligation or liability.

(k) Accredited Investor. Such WI Owner is an “accredited investor” within the meaning of Regulation D, Rule 501(a), promulgated by the Commission.

(l) Restricted Securities. Such WI Owner understands that the shares of Concho Resources Common Stock will not have been registered pursuant to the Securities Act or any applicable state securities laws, that the shares of Concho Resources Common Stock will be characterized as “restricted securities” under federal securities laws, and that under such laws and applicable regulations the shares of Concho Resources Common Stock cannot be sold or otherwise disposed of without registration under the Securities Act or an exemption therefrom. In this connection, such WI Owner represents that it is familiar with Rule 144 promulgated under the Securities Act, as currently in effect, and understands the resale limitations imposed thereby and by the Securities Act. A legend indicating that the shares of Concho Resources Common Stock have not been registered under applicable federal and state securities laws and referring to the restrictions on transferability and sale of the Concho Resources Common Stock pursuant to this Agreement or otherwise may be placed on any certificate(s) or other document delivered to WI Owner or any substitute therefor and any transfer agent of Concho Resources may be instructed to require compliance therewith.

(m) Investment Intent. The Concho Resources Common Stock is being acquired for the investment portfolio and account of such WI Owner and its Affiliates (and not on behalf of, and without the participation of, any other Person) with the intent of holding the Concho Resources Common Stock for investment and without the intent of participating, directly or indirectly, in a distribution of the Concho Resources Common Stock and not with a view to, or for resale in connection with, any distribution of the Concho Resources Common Stock in violation of applicable securities laws or any portion thereof in violation of applicable securities laws. As of the Closing Date, such WI Owner has no plans to transfer any of the Concho Resources Common Stock on a

specified date or to a specified person other than to its Affiliates or in connection with the IPO.

3.6 Representations and Warranties of Concho Resources. Concho Resources hereby represents and warrants to the other parties to this Agreement as follows, except as set forth, specifically with reference to a particular section below, on the Concho Resources Disclosure Schedule:

(a) Organization. Concho Resources is a corporation duly organized, validly existing and in good standing under the laws of Delaware; has the requisite corporate power and authority to own, lease and operate its properties and to conduct its business as it is presently being conducted; and is duly qualified to do business as a foreign corporation and is in good standing, in each jurisdiction where the character of the properties owned or leased by it or the nature of its activities makes such qualification necessary (except where any failure to be so qualified or to be in good standing would not, individually or in the aggregate, have a Material Adverse Effect on Concho Resources).

(b) Authority and Enforceability. Concho Resources has the requisite corporate power and authority to enter into and deliver this Agreement and to consummate the transactions contemplated hereby. The execution and delivery by Concho Resources of this Agreement and the consummation of the transactions contemplated hereby have been duly and validly authorized by all necessary corporate action, including approval by the board of directors and stockholder of Concho Resources, and no other proceedings are necessary to consummate the transactions contemplated hereby. This Agreement has been duly and validly executed and delivered and constitutes a valid and binding obligation of Concho Resources enforceable against it in accordance with its terms, except as such enforceability may be limited by bankruptcy, insolvency, reorganization and similar laws affecting creditors generally and by the availability of equitable remedies.

(c) No Violations. The execution and delivery of this Agreement and the consummation of the transactions contemplated hereby will not, conflict with, result in any violation of or default (with or without notice or lapse of time or both) under, give rise to a right of termination, cancellation or acceleration of any obligation or to the loss of a material benefit under, or result in the creation of any Lien on any of the properties or assets of Concho Resources under, any provision of: (i) the certificate of incorporation, bylaws or any other organizational documents of Concho Resources; (ii) any agreement including any loan or credit agreement, note, bond, mortgage, indenture, lease, permit, concession, franchise, license or other agreement or instrument applicable to Concho Resources or by which any of its assets or properties may be bound; or (iii) any judgment, order, decree, statute, law, ordinance, rule or regulation applicable to Concho Resources or any of its properties or assets, other than, in the case of clause (ii) or (iii) above, any such conflict, violation, default, right, loss or Lien that, individually or in the aggregate, would not have a Material Adverse Effect on Concho Resources.

(d) No Consents. No consent, approval, order or authorization of, registration, declaration or filing with, or permit from, any Governmental Authority is required by or with respect to Concho Resources in connection with the execution and delivery by Concho Resources of this Agreement or the consummation by Concho Resources of the transactions contemplated hereby. No Third-Party Consent is required by or with respect to Concho Resources in connection with the execution and delivery by it of this Agreement or the consummation by it of the transactions contemplated hereby, except for any such Third-Party Consent which the failure to obtain would not, individually or in the aggregate, have a Material Adverse Effect on Concho Resources.

(e) Capital Structure. The authorized capital stock of Concho Resources consists of 1,000 shares of common stock. There is one (1) share of common stock issued and outstanding. Other than as contemplated by this Agreement, no shares of capital stock are reserved for issuance for any other purpose. All the issued and outstanding shares of capital stock of Concho Resources are duly authorized, validly issued, fully paid and nonassessable and have not been issued in violation of any preemptive or similar rights. Other than as contemplated by this Agreement, there are no Equity Interest Equivalents or other contracts of any character to which Concho Resources is a party or by which it is bound obligating Concho Resources to issue, deliver, or sell, or cause to be, issued, delivered or sold, additional Equity Interests of Concho Resources. There are no outstanding obligations of Concho Resources to repurchase, redeem, or otherwise acquire Equity Interests of Concho Resources.

(f) Litigation. No litigation, arbitration, investigation or other proceeding of any Person is pending or, to the knowledge of Concho Resources, threatened against Concho Resources or its assets, nor to the knowledge of Concho Resources are there any facts or circumstances existing which could reasonably give rise to any such litigation, arbitration, investigation or proceeding. Concho Resources is not subject to any outstanding injunction, judgment, order, decree, settlement agreement, conciliation agreement, letter of commitment, deficiency letter or ruling (other than routine oil and gas field regulatory orders).

(g) Brokers. No broker, finder, investment banker or other Person is or will be, in connection with the transactions contemplated by this Agreement, entitled to any brokerage, finder’s or other fee or compensation based on any arrangement or agreement made by or on behalf of Concho Resources and for which any party will have any obligation or liability.

(h) No Operations. As of the Closing Date and immediately prior to the consummation of the transactions contemplated hereby, Concho Resources has no assets, liabilities or operations.

IV. CONDUCT OF BUSINESS PRIOR TO CLOSING

Each of Concho Holdings, the Concho Holdings Stockholders, Chase, Caza and the WI Owners severally covenants and agrees (only with respect to itself) that during the period from the date of this Agreement until the Closing Date or the date, if any, on which this Agreement is earlier terminated pursuant to Article VIII, except as (w) disclosed in Section 4.1 of such party’s

disclosure schedule, (x) expressly contemplated or permitted by this Agreement, (y) required by applicable law or (z) agreed to in writing by Chase and Concho Holdings, after the date of this Agreement and prior to the Closing Date

4.1 Ordinary Course. The Concho Holdings Companies, Chase and Caza shall carry on their businesses in the usual, regular and ordinary course in substantially the same manner as heretofore conducted and shall use all commercially Reasonable Efforts to preserve intact its present business organizations, keep available the services of its current officers and employees, and endeavor to preserve its relationship with customers, suppliers and others having business dealings with it to the end that its goodwill and ongoing business shall not be impaired in any material respect on the Closing Date.

4.2 Dividends; Changes in Equity Interests. None of the Concho Holdings Companies shall: (a) declare or pay any dividends on or make other distributions in respect of any of their equity securities, except as due on the Concho Holdings Preferred Stock; (b) split, combine or reclassify any of their equity securities or issue or authorize or propose the issuance of any other securities in respect of, in lieu of or in substitution for such equity securities; or (c) repurchase, redeem or otherwise acquire, any of its securities.

4.3 Issuance of Securities. None of the Concho Holdings Companies shall issue, deliver or sell, or authorize or propose to issue, deliver or sell, any of its equity securities of any class, any voting debt or other securities or any securities convertible into, or any rights, warrants or options to acquire, any such equity securities, voting debt, other securities or convertible securities, except pursuant to the Concho Holdings Stock Option Plan and capital calls pursuant to the Concho Holdings Stock Purchase Agreement.

4.4 Encumbrances. None of the Concho Holdings Stockholders shall sell, pledge, encumber or otherwise dispose of any shares of Concho Holdings Common Stock or Concho Holdings Preferred Stock other than pledges in favor of Concho Holdings.

4.5 Governing Documents. None of the Concho Holdings Companies shall amend or propose to amend its organizational documents.

4.6 No Acquisitions. None of the Concho Holdings Companies shall acquire or agree to acquire by merging or consolidating with, or by purchasing any equity interest in or any of the assets of, or by any other manner, any business or any corporation, partnership, association or other business organization or division thereof, except such acquisitions of interests made in the ordinary course of business and as to which the aggregate acquisition purchase price thereof does not exceed $15,000,000.

4.7 No Dispositions. None of the Concho Holdings Companies shall sell, lease, encumber or otherwise dispose of, or agree to sell, lease (whether such lease is an operating or capital lease), encumber or otherwise dispose of, any of its assets, other than sales, leases, encumbrances or other dispositions in the ordinary course of business consistent with past practice (including without limitation the sale of production and transfer of inventory) or that are not material, individually or in the aggregate, to the Concho Holdings Companies. None of Chase, Caza or the WI Owners shall, respectively, sell, lease, encumber or otherwise dispose of,

or agree to sell, lease (whether such lease is an operating or capital lease), encumber or otherwise dispose of any of the Assets.

4.8 No Dissolution. Except as otherwise permitted or contemplated by this Agreement, none of the Concho Holdings Companies shall authorize, recommend, propose or announce an intention to adopt a plan of complete or partial liquidation or dissolution.

4.9 Accounting. None of the Concho Holdings Companies shall make any changes in their respective accounting methods, except as required by law, rule, regulation or generally accepted accounting practices and as recommended by Concho Holdings’ independent accountants.

4.10 Insurance. Each of the Concho Holdings Companies, Chase and Caza shall use commercially Reasonable Efforts to maintain all insurance policies each such entity has in effect as of the date of this Agreement without reduction in the terms or coverage of such policies, including without limitation the amount of coverage.

4.11 Tax Matters. None of the Concho Holdings Companies shall (a) make or rescind any material election relating to taxes; (b) change any material tax accounting method or (c) settle or compromise any material claim, action, suit, litigation, proceeding, arbitration, investigation, audit or controversy relating to taxes.

4.12 Certain Employee Matters. None of the Concho Holdings Companies shall: (a) amend or modify in any respect or receive any assets from any pension plan; (b) enter into any new or amend any existing, employment or severance or termination agreement with any director, officer or employee; (c) grant any options or other awards to any director, officer, employee or agent, except for any such options or other awards which are currently or become due under the Concho Holdings Stock Option Plan; or (d) become obligated under any new employee benefit plan or pension plan which was not in existence or approved appropriately prior to the date hereof, or amend any such plan or arrangement in existence on the date hereof.

4.13 Indebtedness; Agreements; Capital Expenditures; Litigation. None of the Concho Holdings Companies shall (a) incur any indebtedness for borrowed money; (b) enter into any material lease (whether such lease is an operating or capital lease), other than oil, gas and mineral leases in the ordinary course of business; (c) make or commit to make aggregate capital expenditures in excess of those required by Concho Holdings’ 2006 capital budget (a copy of which has been provided to Chase), or otherwise bind itself under any agreement not terminable by the Concho Holdings Companies upon not more than thirty (30) days notice without penalty; or (d) settle any litigation for amounts in excess of the applicable insurance coverage limits.

V. ADDITIONAL AGREEMENTS

5.1 Access to Information and Field Assets. Upon reasonable notice, the Concho Holdings Companies, Chase, Caza and the WI Owners shall from the date hereof until the Closing Date or the date, if any, on which this Agreement is earlier terminated pursuant to Article VIII:

(a) afford to each other’s and Concho Resources’ officers, employees, accountants, counsel and other representatives access, to all their properties, books,

contracts, commitments, files and records, as well as to its officers and employees and, during such period, shall furnish all other information concerning its business, properties and personnel as such other party may reasonably request; and

(b) permit, or in case of any third-party operated Oil and Gas Interests of such party, use its best good faith efforts to cause the operator thereof to permit, each other’s and Concho Resources’ authorized representatives to consult with such party’s or third-party operator’s agents and employees and to conduct, at the reviewing party’s sole risk and expense, on-site inspections, tests and inventories of the Oil and Gas Interests of such party.

Each party hereto agrees that it will not, and will cause its respective representatives not to, use any information obtained pursuant to this Section 5.1 for any purpose unrelated to the consummation of the transactions contemplated by this Agreement.

5.2 Regulatory Approvals. Each party hereto shall cooperate and use its reasonable best efforts to promptly prepare and file all necessary documentation to effect all necessary applications, notices, petitions, filings and other documents, and use all commercially Reasonable Efforts to obtain (and will cooperate with each other in obtaining) any consent, acquiescence, authorization, order or approval of, and any exemption or nonopposition by, any Governmental Entity required to be obtained or made by any party hereto in connection with the taking of any action contemplated thereby or by this Agreement.

5.3 Agreement to Defend. In the event any claim, action, suit, investigation or other proceeding by any governmental body or other Person or other legal or administrative proceeding is commenced that questions the validity or legality of the transactions contemplated hereby or seeks damages in connection therewith, the parties hereby agree to cooperate and use their commercially Reasonable Efforts to defend against and respond thereto.

5.4 Public Announcements. Prior to the Closing, no party hereto shall issue any press release or otherwise make any public statements with respect to the transactions contemplated by this Agreement, without the consent of Chase and Concho Holdings, except as may be required by applicable law and so long as the disclosing party notifies Chase and Concho Holdings of such press release or public statement and provides Chase and Concho Holdings a copy of the proposed press release or public statement at least 12 hours prior to the time the release or statement is made public; provided, that after the Closing, all press releases concerning the transactions contemplated by this Agreement, shall be made by Concho Resources.

5.5 Certain Actions of Concho Holdings and the Concho Holdings Stockholders. Prior to the Closing Date:

(a) the Concho Holdings Stockholders will take such action as shall be necessary to eliminate any obligation on the part of Concho Holdings to pay the “Liquidation Price” (as such term is defined in the Certificate of Incorporation of Concho Holdings) upon the consummation of the transactions contemplated by this Agreement;

(b) Concho Holdings and the Concho Holdings Stockholders shall terminate the Concho Holdings Stock Purchase Agreement; and

5.6 Ancillary Agreements. Each of the parties hereto, to the extent that they are a party thereto, shall, at or prior to the Closing (but effective as of and conditioned upon the Closing), enter into each of the following agreements (collectively, the “Ancillary Agreements”) to which they are a party:

(a) Stockholders’ Agreement in the form attached hereto as Exhibit 5.6(a);

(b) Registration Rights Agreement in the form attached hereto as Exhibit 5.6(b);

(d) Business Opportunities Agreement in the form attached hereto as Exhibit 5.6(d);

(e) Contract Operator Agreement in the form attached hereto as Exhibit 5.6(e);

(f) Assignment, Bill of Sale and Conveyance of Salt Water Disposal System Facilities in the form attached hereto as Exhibit 5.6(f); and

(g) Salt Water Disposal System Ownership and Operating Agreement in the form attached hereto as Exhibit 5.6(g).

5.7 Credit Agreements. As used in this Section 5.7, “Concho Resources Entities” means Concho Resources and its subsidiaries and “Chase Entities” means Chase and its Affiliates other than the Concho Resources Entities. The parties anticipate that the Concho Resources Entities will from time to time be subsidiaries of Chase, but it is the mutual expectation of the parties (on which they are relying) that the borrowing arrangements and financial affairs of the Concho Resources Entities will be conducted separately from those of the Chase Entities. To confirm this expectation, Chase hereby agrees that Chase will not enter into (and Chase will insure that the other Chase Entities do not enter into) any agreement with third party lenders, bondholders, indenture trustees or other Persons under which any Concho Resources Entity will be obligated to, or any Chase Entity will be obligated to cause any Concho Resources Entity to, guarantee any indebtedness or other financial obligations of any Chase Entity or comply with any covenants, conditions or restrictions relating to any such indebtedness or other financial obligations.

5.8 Other Actions. Except as contemplated by this Agreement, no party shall take or agree or commit to take any action that is reasonably likely to result in any of its respective representations or warranties hereunder being untrue in any material respect or in any of the conditions to closing set forth in Article VI not being satisfied. Each of the parties agrees to use its reasonable best efforts to satisfy the conditions to closing set forth in this Agreement.

5.9 Indemnification Arrangements. Following the transfer of the Concho Holdings Stockholders’ Equity Interests in Concho Holdings to Concho Resources, Concho Resources

shall either (i) maintain the corporate existence of Concho Holdings and leave any and all indemnification provisions contained in its organizational documents or other indemnification agreements or other similar arrangements unaltered from and after the Closing Date for a period of six years, in order that any Person serving as a director or officer of Concho Holdings at any time prior to the Closing Date (each, and “Indemnified Party”) would continue to be entitled to the indemnification afforded such person pursuant to such organizational documents or other indemnification agreements or arrangements from and after the Closing Date for a period of six years or (ii) make proper provisions to ensure that each Indemnified Party is afforded at least the same level of indemnification provided under the organizational documents, indemnification agreements or other arrangement of Concho Holdings existing immediately prior to the Closing for a period of six years after the Closing Date. The provisions of this Section 5.9 are intended to be for the benefit of, and shall be enforceable by, the parties hereto and each Indemnified Party, his heirs and representatives. The rights provided the Indemnified Parties under this Section shall be in addition to, and not in lieu of, any rights to indemnity that such Persons may have under any other agreements.

5.10 Transfer Taxes. All transfer, documentary, sales, use, stamp, registration and other such taxes and fees (“Transfer Taxes”) incurred in connection with the transfer of the Chase Assets, the Caza Assets, the WI Assets or the Concho Holdings Common Stock to Concho Resources shall be paid by Concho Resources. The parties, including Concho Resources, shall reasonably cooperate with each other to provide any information and documentation reasonably requested that may be necessary to obtain any exemption from any Transfer Taxes.

5.11 Proration of Property Taxes. All real and personal property taxes imposed on or with respect to any of the Assets shall be prorated as of the Effective Date among Concho Resources, on the one hand, and the Sellers, on the other hand, as applicable. Each of the Sellers, as applicable, shall be responsible for purposes of such proration, for those days before the Effective Date, and Concho Resources shall be responsible, for purposes of such proration, for those days on or after the Effective Date.

5.12 Adjustments. Adjustments shall be made between Concho Resources and Sellers so that (a) all expenses (including all drilling costs, all capital expenditures, and all overhead charges under applicable operating agreements, and all other overhead charges actually charged by third parties) which are incurred in the operation of the Assets from and after the Effective Date will be borne by Concho Resources, and all proceeds (net of applicable production, severance, and similar taxes) from the sale of oil, gas and/or other minerals produced from the Assets from and after the Effective Date will be received by Concho Resources, and (b) all expenses which are incurred in the operation of the Assets before the Effective Date will be borne by Sellers, as applicable, and all proceeds (net of applicable production, severance, and similar taxes) from the sale of oil, gas and/or other minerals produced from the Assets before the Effective Date will be received by Sellers, as applicable. It is agreed that, in making such adjustments: (i) oil which was produced from the Assets and which was, on the Effective Date, stored in tanks located on the Assets (or located elsewhere but used to store oil produced from the Assets prior to delivery to oil purchasers) and above pipeline connections shall be deemed to have been produced before the Effective Date (it is recognized that such tanks were not gauged on the Effective Date for the purposes of this Agreement and that determination of the volume of such oil in storage will be based on the best available data, which may include estimates), and (ii) no consideration shall be given to the local, state or federal income tax liabilities of any

party. On or before 120 days after Closing, Chase and Concho Resources shall review any additional information which may then be available pertaining to the adjustments provided for in this section, shall determine the adjustments to be made hereunder, and shall make any such adjustments by appropriate payments in cash from Sellers to Concho Resources or from Concho Resources to Sellers. Thereafter, should any additional items which would be the subject of adjustments provided for in this section come to the attention of Sellers or Concho Resources, such adjustments shall be made by appropriate payments from Sellers to Concho Resources or from Concho Resources to Sellers.

5.13 Concho Resources Board of Directors. At the Closing Date, the parties hereto shall cause each of Bradley D. Bartek, John A. Knorr, Robert C. Chase, Timothy A. Leach, Steven L. Beal, W. Howard Keenan, Jr., Tucker S. Bridwell, and A. Wellford Tabor to be elected to the Board of Directors of Concho Resources. In addition, the parties hereto shall cause two individuals nominated by Chase and approved by the directors named in the preceding sentence (which approval shall not be unreasonably withheld) to be elected to the Board of Directors of Concho Resources (one of whom shall satisfy the independence standards of the New York Stock Exchange and the Nasdaq National Market for audit committee members and shall qualify as an audit committee financial expert under the rules and regulations of the Commission).

5.14 Preferential Rights and Consents. As soon as practicable following Closing, Concho Resources shall prepare and send letters to any parties holding valid, exercisable preferential purchase rights covering any of the Assets, requesting a waiver of such rights if they apply to the transactions contemplated by this Agreement, but offering to sell to such holder, in accordance with the contractual provisions applicable to such right, the Assets covered by such right on the terms hereof. If any holder of a preferential purchase right notifies Concho Resources that it intends to consummate the purchase of the Assets to which its preferential purchase right applies, then Concho Resources shall sell such Assets to such holder for the value for such Assets determined in good faith by Concho Resources to be the amount that it would sell such property on an individual basis in the absence of the transaction contemplated hereby. Concho Resources shall satisfy all valid preferential purchase right obligations of the Sellers arising as a result of the consummation of the transactions contemplated by this Agreement and shall indemnify and hold the Sellers harmless from and against any and all claims, liabilities, losses, costs and expenses (including, without limitation, court costs and reasonable attorneys’ fees) in connection therewith.

5.15 Registration Statement and Prospectus. Concho Resources, Concho Holdings, the Concho Holdings Stockholders holding five percent or more of the Concho Resources Common Stock and the Sellers shall cooperate and promptly prepare a Registration Statement on Form S-1 in connection with the initial public offering of shares of the Concho Resources Common Stock (the “IPO”), and, subject to Concho Resources’ receiving promptly the required information from Concho Holdings, the Concho Holdings Stockholders and the Sellers, Concho Resources shall file the Registration Statement with the Commission as soon as practicable after the Closing Date. Concho Resources shall use all Reasonable Efforts, and Concho Holdings, the Concho Holdings Stockholders and the Sellers shall cooperate with Concho Resources (including furnishing promptly all information respectively concerning Concho Holdings, the Concho Holdings Stockholders and the Sellers as may be reasonably requested by Concho Resources), to have such registration statement (as it may be amended or supplemented) declared effective under the Securities Act as promptly as practicable after such filing. Concho Resources shall use

all Reasonable Efforts, and Concho Holdings, the Concho Holdings Stockholders and the Sellers shall cooperate with Concho Resources, to obtain all necessary state securities laws or “blue sky” permits, approvals and registrations in connection with such initial public offering.

5.16 Lease Purchase Agreement. As soon as practicable following the Closing, the parties shall enter into a mutually acceptable purchase agreement giving Concho Resources the right to purchase, at Chase and/or Caza’s actual cost therefor, thirty-five percent of the interest of Chase and/or Caza in the Oil and Gas Interests now owned by any of them in the lands previously identified by them to Concho Resources as the PRO prospect.

5.17 Offer to Chase Non-Accredited Investors and Chase Accredited Investors.Concho Resources will (i) with respect to the Chase Non-Accredited Investors who elect to sell their right, title and interest in and to the Additional Non-Accredited Assets for consideration including shares of Concho Resources Common Stock, within 30 days after the informational requirements of Regulation D under the Securities Act are met, (ii) with respect to the Chase Non-Accredited Investors who elect to sell their right, title and interest in and to the Additional Non-Accredited Assets for cash, as soon as possible upon being notified by such Chase Non –Accredited Investor of its interest in selling such right, title and interest, and (iii) with respect to the Chase Accredited Investors, by March 3, 2006:

(a) offer to purchase, subject to satisfactory diligence and documentation customary in the oil and gas industry, and, if the offer is accepted, thereafter consummate the purchase of, each such Chase Non-Accredited Investor’s right, title and interest in and to the Additional Non-Accredited Assets in exchange for total aggregate consideration set forth next to each such Chase Non-Accredited Investor’s name on Schedule IV in the form of, at the option of each such Chase Non-Accredited Investor, shares of Concho Resources Common Stock or a combination of shares of Concho Resources Common Stock (at a per share price of $6.00) and cash;

(b) offer to purchase, subject to satisfactory diligence and documentation customary in the oil and gas industry, and, if the offer is accepted, thereafter consummate the purchase of, each such Chase Non-Accredited Investor’s right, title and interest in and to the Additional Non-Accredited Assets in exchange for total aggregate cash consideration set forth next to each such Chase Non-Accredited Investor’s name on Schedule IV;

(c) offer to purchase, subject to satisfactory diligence and documentation customary in the oil and gas industry, and, if the offer is accepted, thereafter consummate the purchase of, each Chase Accredited Investor’s right, title and interest in and to the Additional Accredited Assets in exchange for total aggregate consideration set forth next to such Chase Accredited Investor’s name on Schedule V in the form of, at the option of such Chase Accredited Investor, shares of Concho Resources Common Stock (at a per share price of $6.00) and/or cash.

VI. CONDITIONS TO CLOSING

6.1 Conditions to Each Party’s Obligation to Effect the Transactions Contemplated by this Agreement. The respective obligation of each party to consummate the transactions contemplated by this Agreement shall be subject to the satisfaction prior to and on the Closing Date of the following conditions:

(a) Approvals. All filings required to be made prior to the Closing Date with, and all Third Party Consents and consents, approvals, permits and authorizations required to be obtained prior to the Closing Date from, any Governmental Entity in connection with the execution and delivery of this Agreement and the consummation of the transactions contemplated hereby shall have been made or obtained (as the case may be), except for such consents, approvals, permits and authorizations the failure of which to be obtained would not, in the aggregate, be reasonably likely to result in a Material Adverse Effect on the applicable party, and provided that and no such consent, approval, permit or authorization shall impose terms or conditions that would have, or would be reasonably likely to have, a Material Adverse Effect on the applicable party.

(b) No Injunctions or Restraints. No temporary restraining order, preliminary or permanent injunction or other order issued by any court of competent jurisdiction, no order of any Governmental Entity having jurisdiction over any party hereto, and no other legal restraint or prohibition shall be in effect preventing or making illegal the consummation of the transactions contemplated by this Agreement.

(c) Representations and Warranties. Each of the representations and warranties of each party set forth in this Agreement shall have been accurate in all material respects as of the Closing Date as if made on the Closing Date, except for breaches or inaccuracies of representations or warranties the circumstances giving rise to which, individually or in the aggregate, do not constitute and could not reasonably be expected to have a material adverse effect on the transactions contemplated by this Agreement (it being understood that, for purposes of determining the accuracy of such representations and warranties, all “Material Adverse Effect” qualifications and other materiality qualifications and similar qualifications contained in such representations and warranties shall be disregarded).

(d) Performance of Obligations. Each party shall have performed in all material respects all obligations required to be performed by it under this Agreement at or prior to the Closing Date, except for obligations which, individually or in the aggregate, do not constitute and could not reasonably be expected to have a material adverse effect on the transactions contemplated by this Agreement

(e) No Material Adverse Effect. Since the date of this Agreement, there shall not have occurred any Material Adverse Effect with respect to Concho Holdings, Chase or Caza.

(f) Bank Financing. Concho Resources shall have obtained a minimum of $400,000,000 in bank financing.

(g) Credit Agreements. Prior to the Closing Date, each of Chase and Concho Holdings shall have obtained any required consents of the lenders under their respective credit agreements to the transactions contemplated by this Agreement.

VII. CLOSING

7.1 Closing. The consummation of the transactions contemplated by this Agreement (the “Closing”) shall take place at the offices of Thompson & Knight LLP, 1700 Pacific Avenue, Suite 3300, Dallas, Texas 75238 on the later of February 27, 2006 or the second business day after each of the conditions to closing in Article VI are satisfied, or at such other date, time or place as the parties hereto may agree (the “Closing Date”).

7.2 Actions to Occur at Closing. On the Closing Date:

(a) Each Concho Holdings Stockholder shall deliver to Concho Resources certificates representing such Concho Holdings Stockholder’s Equity Interest duly endorsed for transfer or accompanied by stock powers duly endorsed for transfer to Concho Resources.

(b) Chase shall deliver to Concho Resources the Chase Assets;

(d) The WI Owners shall deliver to Concho Resources the WI Assets; and

(e) Concho Resources shall deliver (i) to each of the Concho Holdings Stockholders, their pro rata share of the Concho Holdings Consideration, (ii) to Chase, the Chase Consideration, (iii) to Caza, the Caza Consideration and (iv) to the WI Owners, their pro rata share of the WI Owner Consideration as set forth on Schedule II hereto.

(f) Chase, Caza, and the WI Owners each shall deliver to Concho Resources a Certificate of Non-Foreign Status that satisfies Code Section 1445 and the accompanying Treasury regulations.

VIII. TERMINATION

8.1 Termination. This Agreement may be terminated at any time prior to the Closing Date:

(a) by mutual written consent of all the parties hereto;

(b) by any party hereto if (i) any Governmental Authority shall have issued any order or taken any action temporarily or permanently restraining, enjoining or otherwise prohibiting the consummation of the transactions consummated by this Agreement or (ii) if the transactions contemplated hereby shall not have been consummated on or before March 31, 2006;

(c) by the Concho Holdings Stockholders holding 51% of the outstanding Equity Interests of Concho Holdings if (i) there has been a breach of the representations

and warranties contained in this agreement made by Chase, Caza or the WI Owners such that the condition described in Section 6.1(c) is not met and such breaching party has failed to cure such breach within 10 days following such breaching party’s receipt of notice of such breach from such Concho Holdings Stockholders or their designated representative (but in any event not later than March 31, 2006) or (ii) except for failures which would not, individually or in the aggregate, reasonably be expected to have a material adverse effect on the transactions contemplated by this Agreement, Chase, Caza or the WI Owners failed to comply in any material respect with any of their respective covenants or agreements contained in this Agreement and such failure has not been, or cannot be, cured within 10 days after notice and demand for cure (but in any event not later than March 31, 2006);

(d) by Chase if (i) there has been a breach of the representations and warranties contained in this agreement made by Concho Holdings, Concho Resources or any Concho Holdings Stockholder such that the condition described in Section 6.1(c) is not met and such breaching party has failed to cure such breach within 10 days following such breaching party’s receipt of notice of such breach from Chase (but in any event not later than March 31, 2006) or (ii) except for failures which would not, individually or in the aggregate, reasonably be expected to have a material adverse effect on the transactions contemplated by this Agreement, Concho Holdings or on Concho Resources, Concho Holdings, Concho Resources or any Concho Holdings Stockholder failed to comply in any material respect with any of their respective covenants or agreements contained in this Agreement and such failure has not been, or cannot be, cured within 10 days after notice and demand for cure (but in any event not later than March 31, 2006).

8.2 Effect of Termination. Each party’s right of termination under Section 8.1 is in addition to any other rights it may have under this Agreement or otherwise, and the exercise of such right of termination will not be an election of remedies. In the event of termination of this Agreement pursuant to Section 8.1, this Agreement shall forthwith become void and there shall be no liability or obligation on the part of any party hereto except with respect to this Section 8.2, the last sentence of Section 5.1 and to the extent that such termination results from the willful breach by a party hereto of any of its representations and warranties or of any of its covenants or agreements contained in this Agreement.

8.3 Amendment. This Agreement may be amended by the parties hereto, by action taken or authorized by their respective managers, Board of Directors or equivalent body, if applicable, as the case may be, at any time. This Agreement may not be amended except by an instrument in writing signed on behalf of each of the parties hereto.

8.4 Extension; Waiver. At any time prior to the Closing Date, the parties hereto, by action taken or authorized by their respective managers, Board of Directors or equivalent body, if applicable, as the case may be, may, to the extent legally allowed: (a) extend the time for the performance of any of the obligations or other acts of the other parties hereto; (b) waive any inaccuracies in the representations and warranties contained herein or in any document delivered pursuant hereto; and (c) waive compliance with any of the agreements or conditions contained herein. Any agreement on the part of a party hereto to any such extension or waiver shall be valid only if set forth in a written instrument signed on behalf of such party.

IX. SURVIVAL

9.1 No Survival. The respective representations and warranties of each of the parties hereto contained in this Agreement shall not survive the Closing, and thereafter none of Concho Holdings, any Concho Holdings Stockholder, Chase, Caza, any WI Owner, Concho Resources, or any of their respective officers, directors, managers, trustees, employees or Affiliates shall have any liability whatsoever (whether pursuant to this Agreement or otherwise) with respect to any such representation or warranty.

X. GENERAL PROVISIONS

10.1 Notices. Any notice or communication required or permitted hereunder shall be in writing and either delivered personally, telegraphed or telecopied or sent by certified or registered mail, postage prepaid, and shall be deemed to be given, dated and received (a) when so delivered personally, (b) upon receipt of an appropriate electronic confirmation when so delivered by telegraph or telecopy (to such number specified below or another number or numbers as such Person may subsequently designate by notice given hereunder), or (c) five business days after the date of mailing to the following address or to such other address or addresses as such Person may subsequently designate by notice given hereunder, if so delivered by mail:

If to Concho Holdings, to:

Concho Equity Holdings Corp.
550 West Texas Avenue, Suite 1300
Midland, Texas 79701
Attn: David W. Copeland
Telephone (432) 683-7443
Telecopy (432) 683-7441

With a copy to:

Thompson & Knight LLP
1700 Pacific Avenue, Suite 3300
Dallas, Texas 75201
Attn: Mr. Joe Dannenmaier
Telephone (214) 969-1700
Telecopy (214) 969-1751

If to the Concho Holdings Stockholders, to the address set forth opposite such Concho Holdings Stockholder’s name on the signature pages to this Agreement.

If to Chase, Caza or the WI Owners, to:

Robert C. Chase
PO Box 1767
Artesia, New Mexico 88211
Telephone 505.748.1288
Telecopy 505.746.9539

With a copy to:

Vinson & Elkins L.L.P.
First City Tower
1001 Fannin Street, Suite 2300
Houston, Texas 77002
Attn: Mr. T. Mark Kelly
Telephone 713.758.2222
Telecopy 713.615.5531

If to Concho Resources, to:

Concho Resources Inc.
550 West Texas Avenue, Suite 1300
Midland, Texas 79701
Attn: Mr. David W. Copeland
Telephone (432) 683-7443

Telecopy (432) 683-7441

With a copy to:

Thompson & Knight LLP
1700 Pacific Avenue, Suite 3300
Dallas, Texas 75201
Attn: Mr. Joe Dannenmaier
Telephone (214) 969-1700
Telecopy (214) 969-1751

10.2 Descriptive Headings. The headings contained in this Agreement are for reference purposes only and shall not affect in any way the meaning or interpretation of this Agreement.

10.3 Counterparts. This Agreement may be executed in two or more counterparts, all of which shall be considered one and the same agreement and shall become effective when one or more counterparts have been signed by each of the parties and delivered to the other parties, it being understood that all parties need not sign the same counterpart.

10.4 Entire Agreement; No Third Party Beneficiaries. This Agreement (a) constitutes the entire agreement and supersedes all prior agreements and understandings, both written and oral, among the parties with respect to the subject matter hereto and (b) is not intended to confer upon any Person other than the parties hereto any rights, remedies or obligations hereunder.

10.5 Governing Law. This Agreement shall be governed and construed in accordance with the laws of the State of Texas without giving effect to the principles of conflicts of law thereof.

10.6 Severability. Each party agrees that, should any court or other competent authority hold any provision of this Agreement or part hereof to be null, void or unenforceable,

EXHIBIT “A”

Part I: Grantor’s Operated Interests

ACCT #

LAND #

PROPERTY

LESSOR

LESSEE

DATE

COUNTY

STATE

SECTION

LANDS

0007

1006

Antelope State

ST NM B-3627-40

E. Ruth Piatt

12/10/1934

Eddy

17S

31E

SW/4 surface to base of San Andres formation

0008

M-149

Antelope 36 State Com

ST NM B-3627-40

E. Ruth Piatt

12/10/1934

Eddy

17S

31E

SW/4 below the base of the San Andres formation

0008

M-149

Antelope 36 State Com

ST NM V-6248

Chase Oil Corporation

6/1/2001

Eddy

17S

31E

N/2NW/4, SE/4NW/4 below the base of the San Andres formation

0008

M-149

Antelope 36 State Com

ST NM B-4109

William Spurck

4/10/1935

Eddy

17S

31E

SW/4NW/4 from the base of the San Andres formation to 12,596’

0009

1019

Aoudad State

ST NM B-4109

William Spurck

4/10/1935

Eddy

17S

31E

SW/4NW/4 surface to base of San Andres formation, NE/4NE/4 surface to 4176’, NW/4NE/4 surface to 4151’, SW/4NE/4 surface to 4278’

0018

1042

Aztec State

ST NM E-9197

Southern Union Gas Company

7/19/1955

Eddy

16S

28E

S/2SE/4 Surface to 2,360’

0020

1007

Barbary 17 Com

FED NMNM-103871

Chase Oil Corporation

3/1/2000

Eddy

16S

28E

NW/4NE/4, NW/4 to all depths

0022

1275

Barracuda State

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

NW/4NW/4 below 4600’

0024

1043

Bate Federal (Not SWD)

FED NM-0930941

Eugenia Bate

6/1/1957

Lea

19S

33E

SW/4 surface to base of Yates formation or 3373’, whichever is deeper

0025

1044

BC Federal

FED LC-029405-A

Maljamar Oil & Gas Corporation

7/1/1938

Lea

17S

32E

N/2 base of Grayburg formation to top of Wolfcamp formation

0025

1044

BC Federal

FED LC-029405-A

Maljamar Oil & Gas Corporation

7/1/1938

Lea

17S

32E

N/2 base of Grayburg formation to top of Wolfcamp formation

0028

1045

Beech Federal

FED LC-058181

J.H. Harbold

1/1/1940

Eddy

17S

27E

SW/4SW/4 base of San Andres formation to 100’ below base of Yeso formation, NW/4SE/4 base of San Andres formation to base of Wolfcamp formation

0029

1035

Beeson 1

FED LC-028936-G

Enron Oil & Gas Company

2/1/1990

Eddy

17S

30E

NW/4NW/4 surface to 5000’

0030

1034

Beeson D 2

FED LC-028936-B

Enron Oil & Gas Company

11/1/1991

Eddy

17S

30E

E/2NW/4 surface to 5000’

0032

1046

Berry A Federal

FED LC-054988-A

Chase Oil Corporation

10/1/1995

Eddy

17S

30E

S/2NW/4, NE/4NW/4 surface to the base of the San Andres formation

0033

1046

Berry A Federal Paddock

FED LC-054988-A

Chase Oil Corporation

10/1/1995

Eddy

17S

30E

S/2NW/4, NE/4NW/4 below the base of the San Andres formation

0038

1048

Big George State (Not SWD)

ST NM V-3138-2

Pacific Enterprises Oil Company

11/1/1989

Eddy

17S

28E

SE/4NE/4, N/2SE/4, SE/4SE/4 surface to the base of the Wolfcamp formation

0052

1057

Brigham H

FED LC-029342-H

Enron Oil & Gas Company

3/1/1994

Eddy

17S

30E

NW/4SW/4 surface to base of Abo formation

0053

M-103

Brown Bear Com No 1

ST NM OG-4659-5

Lonnie Kemper

10/21/1958

Eddy

16S

28E

SE/4 below 3000’

0053

M-103

Brown Bear Com No 1

FED NMNM-103875

Chase Oil Corporation

3/1/2000

Eddy

16S

28E

SW/4 below the base of the Wolfcamp formation

0054

1024

Brown Bear Federal

FED NMNM-103875

Chase Oil Corporation

3/1/2000

Eddy

16S

28E

SW/4 surface to the base of the Wolfcamp formation

0055

1058

Brown Federal Maljamar

FED LC-029410-B

Carper Drilling Company

5/1/1960

Lea

17S

32E

Lot 1, N/2NE/4 surface to 5500’

0056

1058

Brown Federal Pearsall 7R

FED LC-029410-B

Carper Drilling Company

5/1/1960

Lea

17S

32E

Lot 1, N/2NE/4 surface to 5500’

0072

1220

Holder CB Federal

FED LC-056551

Gulf Oil Corporation

7/1/1978

Eddy

17S

30E

W/2SW/4 below 5000’

0072

1220

Holder CB Federal

FED LC-056551

Gulf Oil Corporation

7/1/1978

Eddy

17S

30E

W/2NW/4 below 5000’

0073

1220

Holder CB Federal Paddock

FED LC-056551

Gulf Oil Corporation

7/1/1978

Eddy

17S

30E

W/2SW/4 surface to 5000’

0073

1220

Holder CB Federal Paddock

FED LC-056551

Gulf Oil Corporation

7/1/1978

Eddy

17S

30E

W/2NW/4 surface to 5000’

ACCT #

LAND #

PROPERTY

LESSOR

LESSEE

DATE

COUNTY

STATE

SECTION

LANDS

0077

1039

Cheyenne Federal

FED LC-062407

Mable F. Leonard

1/1/1944

Eddy

17S

29E

S/2SE/4 2628’ to top of Abo formation

0078

1275

Chinook State

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

SW/4NE/4 to all depths

0079

1065

Choctaw State

ST NM V-184-3

Anadarko Production Company

4/1/1979

Eddy

17S

31E

NE/4NE/4 to all depths

0083

1132

Continental A State

ST NM E-4201

Continental Oil Company

9/11/1950

Eddy

17S

29E

Lots 1, NE/4NW/4 from 2600’ to top of the Wolfcamp formation Lot 2 2600’ to top of Abo formation Lot 3, SE/4NW/4 surface to top of Abo formation

0084

1053

Continental B State ARTQNGB

ST NM B-7596

Continental Oil Company

5/10/1938

Eddy

17S

29E

Lot 4, SE/4SW/4 surface to 2600’

0085

1053

Continental B State

ST NM B-7596

Continental Oil Company

5/10/1938

Eddy

17S

29E

Lot 4, SE/4SW/4 2600’ to top of the Abo formation

0093

1014

Coyote State

ST NM V-6248

Chase Oil Corporation

6/1/2001

Eddy

17S

31E

N/2NW/4, SE/4NW/4 surface to the base of the San Andres formation, SE/4NE/4, N/2SE/4 to all depths

0097

1173

Dexter Federal

FED LC-029020-G

The Ibex Company Inc.

5/1/1960

Eddy

17S

30E

NE/4SW/4, N/2SE/4 surface to top of Queen formation

0098

1173

Dexter Federal Paddock

FED LC-029020-G

The Ibex Company Inc.

5/1/1960

Eddy

17S

30E

NE/4SW/4, N/2SE/4 from the top of the Queen formation to the top of the Abo formation or 7360’, whichever is deeper, less the Premier Sand formation

0099

1234

Diamondbacks State

ST NM B-514

Leonard and Levers, Inc.

12/14/1931

Eddy

17S

29E

N/2 below 5,000’

0100

1142

Dogwood Federal

FED NM-94594

Taurus Oil Inc.

3/1/1995

Eddy

17S

27E

SE/4NW/4 surface to base of the Wolfcamp formation

0112

1205

Edward State Malgbasa

ST NM V-3555

Bulldog Energy Corporation

1/1/1991

Lea

17S

32E

N/2SW/4 to all depths

0113

1199

Edward State Malqn Gas

ST NM B-155

The Texas Company

8/14/1931

Lea

17S

32E

S/2SW/4 Queen formation only

0115

1187

Electra Federal

FED NM-074935

Texaco Expl & Prod Inc.

11/1/1991

Eddy

17S

30E

SW/4 below 4000’

0115

1187

Electra Federal

FED NM-074935

Texaco Expl & Prod Inc.

11/1/1991

Eddy

17S

30E

NW/4 below 4000’

0116

1027

Elk 21 Federal

FED NMNM-100844

Chase Oil Corporation

6/1/1998

Eddy

16S

28E

All below the base of the Wolfcamp formation

0118

1027

Elk 22 Federal

FED NMNM-100844

Chase Oil Corporation

6/1/1998

Eddy

16S

28E

N/2NE/4, NE/4NW/4, W/2W/2 to all depths

0127

1217

Etz State

FED NM-2933

R. D. Collier

10/1/1967

Eddy

17S

30E

N/2NE/4 from 4000’ to the top of the Abo formation

0128

M-153

Etz State Unit Tr. 1

FED NM-2933

R. D. Collier

10/1/1967

Eddy

17S

30E

N/2NE/4 surface to 4000’

0128

M-153

Etz State Unit Tr. 2

FED NM-074936

unknown

8/1/1985

Eddy

17S

30E

SE/4NE/4 surface to top of the Glorieta formation

0128

M-153

Etz State Unit Tr. 3

ST NM B-936

Humble Oil & Refining Co.

6/6/1932

Eddy

17S

30E

E/2SW/4, E/2SE/4 surface to 4000’

0128

M-153

Etz State Unit Tr. 4

ST NM B-1483

Empire Gas & Fuel Co.

11/26/1932

Eddy

17S

30E

W/2SE/4 surface 4000’

0128

M-153

Etz State Unit Tr. 5 and 5A

ST NM B-2130

H. R. Kennedy

9/11/1933

Eddy

17S

30E

N/2NW/4, SE/4NE/4 surface to 4000’

0128

M-153

Etz State Unit Tr. 6

ST NM B-8095

Etz Oil Company, Inc.

4/10/1939

Eddy

17S

30E

S/2NW/4 surface to 4000’

0128

M-153

Etz State Unit Tr. 7

ST NM B-2209

F. William Kutter

12/21/1928

Eddy

17S

30E

NW/4SW/4 surface to 4000’

0128

M-153

Etz State Unit Tr. 8

ST NM VB-71

Texas American Oil Corp.

1/1/1987

Eddy

17S

30E

SW/4NE/4 surface to 4000’

0148

1202

Federal KL 17

FED NM-0397623

Leonard Oil Company

7/1/1949

Eddy

17S

29E

N/2 below 5000’

0149

1230

Federal MA A

FED NM-016796

Carper Drilling Company

2/1/1955

Lea

17S

33E

Lot 2, E/2NW/4 surface to 10,100’

0151

1229

Fee MA B

George Williams, et al

Carper Drilling Company

9/16/1959

Lea

17S

33E

W/2E/2 surface to 10,103’

0151

1229

Fee MA B

Carper Drilling Company

10/2/1959

Lea

17S

33E

W/2E/2 surface to 10,103’

0151

1229

Fee MA B

George Williams, et al

Carper Drilling Company

9/16/1959

Lea

17S

33E

E/2E/2 surface to 10,103’

ACCT #

LAND #

PROPERTY

LESSOR

LESSEE

DATE

COUNTY

STATE

SECTION

LANDS

0151

1229

Fee MA B

Carper Drilling Company

10/2/1959

Lea

17S

33E

E/2E/2 surface to 10,103’

0157

1204

Fir Federal

FED NM-94593

Taurus Corporation

3/1/1995

Eddy

17S

27E

NW/4SW/4 to all depths

0163

1202

Folk Federal

FED-0397623

Leonard Oil Company

7/1/1949

Eddy

17S

29E

N/2, N/2SW/4 surface to 5000’

0166

1165

GC Federal

FED LC-029405-B

Buffalo Oil Company

7/1/1948

Lea

17S

32E

S/2 from base of the San Andres formation to the top of Wolfcamp formation

0166

1165

GC Federal

FED LC-029405-B

Buffalo Oil Company

7/1/1948

Lea

17S

32E

S/2 from base of the San Andres formation to the top of Wolfcamp formation, less the Paddock formation

0168

1203

Gissler Federal

FED NM-83591

Marbob Energy Corporation

4/1/1990

Eddy

17S

30E

Lots 3-4, S/2NW/4, S/2 to all depths

0169

1232

GJ West Coop Unit

Midwest Investment Co.

Marbob Energy Corporation

1/1/1988

Eddy

17S

29E

NW/4NW/4 2721’ to 5000’

0169

1233

GJ West Coop Unit

ST NM B-255

E. Ruth Piatt

9/10/1931

Eddy

17S

29E

SW/4SW/4 to 5000’

0169

1233

GJ West Coop Unit

ST NM B-255

E. Ruth Piatt

9/10/1931

Eddy

17S

29E

NW/4NW/4, S/2SW/4, NE/4SE/4, NW/4SW/4 to 5000’

0169

1233

GJ West Coop Unit

ST NM B-255

E. Ruth Piatt

9/10/1931

Eddy

17S

29E

SE/4, SE/4SW/4 to 5000’

0169

1234

GJ West Coop Unit

ST NM B-514

Leonard and Levers, Inc.

12/14/1931

Eddy

17S

29E

N/2, N/2SW/4, SW/4SW/4 surface to 5000’

0169

1235

GJ West Coop Unit

ST NM B-1266-8

Leonard and Levers, Inc.

10/14/1932

Eddy

17S

29E

E/2NW/4, N/2SW/4, SW/4SW/4 surface to 5000’

0169

1236

GJ West Coop Unit

ST NM B-1266-9

Leonard and Levers, Inc.

10/14/1932

Eddy

17S

29E

S/2NE/4, E/2W/2, SE/4 surface to 5000’

0169

1237

GJ West Coop Unit

ST NM B-9563

Ed W. Owen

3/10/1942

Eddy

17S

29E

N/2NE/4, W/2W/2 surface to 5000’

0169

1238

GJ West Coop Unit

ST NM B-10714-8

D. E. Wallace

10/11/1943

Eddy

17S

29E

NW/4NE/4, SW/4NW/4 surface to 5000’

0169

1239

GJ West Coop Unit

ST NM B-10714-9

D. E. Wallace

10/11/1943

Eddy

17S

29E

NW/4SW/4 surface to 5000’

0169

1239

GJ West Coop Unit

ST NM B-10714-9

D. E. Wallace

10/11/1943

Eddy

17S

29E

NE/4, NE/4NW/4, SW/4NW/4, W/2SE/4, SE/4SE/4 surface to 5000’

0169

1239

GJ West Coop Unit

ST NM B-10714-9

D. E. Wallace

10/11/1943

Eddy

17S

29E

W/2SW/4 surface to 5000’

0169

1240

GJ West Coop Unit

ST NM K-3790

Leonard Oil Company

12/17/1963

Eddy

17S

29E

SE/4NW/4 surface to 5000’

0169

1241

GJ West Coop Unit

ST NM B-2023

Snowden & McSweeney Co.

7/10/1933

Eddy

17S

29E

NE/4SW/4 surface to 5000’

0171

1208

Gold Star Federal

FED NM-29267

Arba Green

6/1/1962

Eddy

17S

29E

NE/4NE/4 from base of San Andres formation to base of the Abo formation, NW/4NE/4 from surface to base of Abo formation

0173

1209

Grace Mitchell B Federal

FED LC-029406-B

Buffalo Oil Company

1/1/1948

Lea

17S

32E

S/2NE/4, SE/4 to all depths

0184

1161

Harvard Federal

FED LC-029338-B

Murphy Minerals Corp., et al

6/1/1996

Eddy

17S

30E

E/2NE/4 to all depths

0184

1161

Harvard Federal

FED LC-029338-B

Murphy Minerals Corp., et al

6/1/1996

Eddy

17S

30E

W/2NW/4 to all depths

0185

1210

Harper State

ST NM B-936

Humble Oil & Refining Co.

11/12/1932

Eddy

17S

30E

E/2SW/4, E/2SE/4 below 4000’

0198

1211

Houma State

ST NM B-8095

Etz Oil Company, Inc.

4/10/1939

Eddy

17S

30E

S/2NW/4 below 4000’

0207

1213

Imperial State

ST NM B-1483

Empire Gas & Fuel Co.

11/26/1932

Eddy

17S

30E

W/2SE/4 below 4000’

0212

1222

JC Federal

FED LC-029509-B

Buffalo Oil Company

4/1/1946

Lea

17S

32E

S/2SE/4 from base of the San Andres formation to the top of the Wolfcamp formation

0212

1222

JC Federal

FED LC-029509-B

Buffalo Oil Company

4/1/1946

Lea

17S

32E

NE/4, E/2NW/4, SW/4, NW/4SE/4 from base of San Andres formation to the top of the Wolfcamp formation

0214

1228

Jenkins B Federal

FED LC-054988-B

Petroleum Corp. of Texas

3/1/1937

Eddy

17S

30E

NW/4 to all depths

0217

1227

Juniper State

ST NM V-4381

Daniel E. Gonzales

6/1/1994

Eddy

17S

30E

SW/4SW/4 to all depths

ACCT #

LAND #

PROPERTY

LESSOR

LESSEE

DATE

COUNTY

STATE

SECTION

LANDS

0221

1026

Kodiak Federal

FED NMNM-101593

Chase Oil Corporation

12/1/1998

Eddy

16S

28E

E/2 to all depths

0222

1154

Langley A Federal

FED NM-16357

Dorothy Langley

8/1/1972

Lea

19S

33E

E/2SW/4, SE/4 below 13,770’, and Langley A Federal No. 1 wellbore located in the NE/4SW/4

0228

1156

Leaker CC State

ST NM B-2366

Maljamar Oil & Gas Corporation

1/8/1934

Lea

17S

32E

NE/4, N/2SE/4 to all depths except the Queen formation

0229

1156

Leaker CC State 2

ST NM B-2366

Maljamar Oil & Gas Corporation

1/8/1934

Lea

17S

32E

NE/4 Queen formation only

0230

1156

Leaker CC State 9

ST NM B-2366

Maljamar Oil & Gas Corporation

1/8/1934

Lea

17S

32E

N/2SE/4 Queen formation only

0238

1334

Loco SW

FED NM-0467932

Atlantic Richfield Company

8/1/1985

Eddy

17S

30E

E/2SW/4 Abo formation only

0251

1133

Maple State

ST NM V-5502

Chase Oil Corporation

4/1/1999

Eddy

17S

28E

Lot 1 to all depths

0255

1175

MC Federal Paddock

FED LC-029509-A

M. E. Baish

8/3/1929

Lea

17S

32E

NE/4, N/2SE/4 base of San Andres formation to top of Abo formation

0255

1175

MC Federal Paddock

FED LC-029509-A

M. E. Baish

8/3/1929

Lea

17S

32E

W/2NW/4 base of San Andres formation to top of Abo formation

0257

1175

MC Federal Com McKee

FED LC-029509-A

M. E. Baish

8/3/1929

Lea

17S

32E

W/2NW/4 below base of Wolfcamp formation

0257

1222

MC Federal Com McKee

FED LC-029509-B

Buffalo Oil Company

4/1/1946

Lea

17S

32E

E/2NW/4, SW/4 below top of Wolfcamp formation

0258

1175

MC Federal 6 Devonian

FED LC-029509-A

M. E. Baish

8/3/1929

Lea

17S

32E

NE/4, N/2SE/4 below base of Wolfcamp formation

0258

1222

MC Federal 6 Devonian

FED LC-029509-B

Buffalo Oil Company

4/1/1946

Lea

17S

32E

S/2SE/4 below top of Wolfcamp formation

0261

1330

McIntyre A E & W Paddock

FED LC-054280

Franklin, Aston & Fair, Inc.

7/1/1975

Eddy

17S

30E

E/2SE/4 surface to base of Abo formation

0261

1331

McIntyre A E & W Paddock

FED LC-057634

Enron Oil & Gas Company

5/1/1996

Eddy

17S

30E

W/2SE/4 surface to base of Abo formation

0262

1330

McIntyre A East 2

FED LC-054280

Franklin, Aston & Fair, Inc.

7/1/1975

Eddy

17S

30E

E/2SE/4 surface to base of Abo formation

0263

1331

McIntyre A West 8 Abo

FED LC-057634

Enron Oil & Gas Company

5/1/1996

Eddy

17S

30E

W/2SE/4 surface to base of Abo formation

0264

1332

McIntyre B Paddock

FED LC-060999

Read & Stevens, Inc., et al

9/1/1987

Eddy

17S

30E

W/2SW/4 surface to base of Abo formation

0265

1333

W D McIntyre C GBJK7RQNGBSA

FED LC-029342-C

Atlantic Richfield Company

5/1/1986

Eddy

17S

30E

E/2NE/4 surface to base of San Andres

0265

1333

W D McIntyre C GBJK7RQNGBSA

FED LC-029342-C

Atlantic Richfield Company

5/1/1986

Eddy

17S

30E

NW/4NW/4 surface to base of San Andres formation

0266

1333

W D McIntyre C Paddock

FED LC-029342-C

Atlantic Richfield Company

5/1/1986

Eddy

17S

30E

E/2NE/4 base of San Andres formation to top of Abo formation

0266

1333

W D McIntyre C Paddock

FED LC-029342-C

Atlantic Richfield Company

5/1/1986

Eddy

17S

30E

NW/4NW/4 base of San Andres formation to top of Glorieta formation

0268

1009

McIntyre DK Federal

FED NMNM-86025

Atlantic Richfield Company

8/1/1995

Eddy

17S

30E

S/2S/2 surface to 5000’

0269

1334

W D McIntyre E

FED NM-0467932

Atlantic Richfield Company

8/1/1985

Eddy

17S

30E

E/2SW/4 surface to top of Abo formation

0269

1334

W D McIntyre E

FED NM-0467932

Atlantic Richfield Company

8/1/1985

Eddy

17S

30E

SE/4NE/4, NE/4SE/4 surface to top of Glorieta formation

0273

1158

Melrose Federal

FED LC-060528

Premier Petroleum Corporation

10/1/1942

Eddy

17S

30E

SW/4NW/4 surface to base of Abo formation, less the Premier Sand of the Grayburg formation

0275

1212

Mesilla State

ST NM B-2130

H. R. Kennedy

9/11/1933

Eddy

17S

30E

SE/4NE/4, N/2NW/4 below 4000’

0276

1068

Mesquite State

ST NM E-742

Humble Oil & Refining Co.

2/11/1946

Eddy

17S

29E

W/2NW/4, NW/4SW/4, E/2SW/4 surface to top of the Abo formation

0277

1160

Miller B

FED LC-058698-B

Pearl Miller

8/11/1938

Lea

17S

32E

N/2NE/4 surface to base of San Andres formation or 700’ subsea

0278

1134

Miller BX

FED LC-061842

Pearl Miller

8/11/1939

Lea

17S

32E

E/2 surface to base of San Andres formation or 700’ subsea

0282

1148

Mimosa State

ST NM OG-181

Humble Oil & Refining Co.

9/18/1956

Eddy

17S

29E

NE/4SW/4 surface to 4452’

ACCT #

LAND #

PROPERTY

LESSOR

LESSEE

DATE

COUNTY

STATE

SECTION

LANDS

0285

1189

Mohawk Federal

FED LC-055259

W. T. Gissler

6/1/1986

Eddy

17S

30E

SW/4SW/4 to all depths

0287

1137

Monsanto 30 State

ST NM V-603

Monsanto Oil Company

8/1/1982

Lea

16S

37E

SE/4 surface to 11,450’

0292

1041

Navaho Federal

FED NM-29269

Mabel F. Leonard

1/1/1944

Eddy

17S

29E

NE/4SE/4 from 2628’ to the top of the Abo formation, NW/4SE/4 from 4000’ to the top of the Abo formation

0296

1138

O’Neill Federal

FED NM-0560378

unknown

8/1/1949

Eddy

16S

30E

E/2, NW/4 surface to base of San Andres formation

0296

1138

O’Neill Federal

FED NM-0560378

unknown

8/1/1949

Eddy

16S

30E

E/2NE/4 surface to base of San Andres

0301

1032

Oryx State

ST NM V-5752

Chase Oil Corporation

4/1/2000

Eddy

16S

27E

S/2 to all depths

0304

1215

Pawnee State

ST NM VB-71

Texas American Oil Corp.

1/1/1987

Eddy

17S

30E

SW/4NE/4 surface to the top of the Abo formation

0305

1195

Pearsall AX

FED LC-029409-A

Kewanee Oil Company

8/1/1959

Lea

17S

32E

SW/4 surface to 700’ subsea

0307

1196

Pearsall BX

FED LC-058514-O

Paul Love

9/22/1939

Lea

17S

32E

NE/4NE/4, S/2NE/4 surface to 700’ subsea, NW/4NE/4 surface to the base of the Queen formation

0312

1275

Petrus D State

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

NE/4SE/4 to all depths

0312

1275

Petrus D State

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

E/2NE/4, N/2SW/4, S/2SE/4 to all depths

0312

1275

Petrus D State

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

SW/4SE/4 to all depths

0315

1003

Polaris B Federal

FED LC-029342-B

Texaco Expl & Prod Inc.

6/1/1991

Eddy

17S

30E

E/2NW/4 below 4000’

0320

1360

Randall Federal

FED NM-7752

Louis J. Root

12/31/1939

Eddy

17S

30E

SE/4SE/4 surface to 5000’

0322

1143

Redbud Federal

FED NM-94595

Taurus Corporation

3/1/1995

Eddy

17S

27E

NE/4NW/4 surface to the base of the Wolfcamp formation

0326

1236

Rincon State

ST NM B-1266-9

Leonard and Levers, Inc.

10/14/1932

Eddy

17S

29E

NW/4SE/4, SE/4SE/4 surface to 5000’

0337

1245

Sapphire State

ST NM A-983

Texas Pacific Coal & Oil Co.

7/27/1928

Lea

23S

36E

NW/4SW/4 from base of Queen formation to base of Abo formation

0341

1252

Schley Federal

FED NM-29281

General American Oil Co.

6/1/1972

Eddy

17S

29E

NE/4SW/4 base of San Andres formation to 6550’

0341

1252

Schley Federal

FED NM-29281

General American Oil Co.

6/1/1972

Eddy

17S

29E

S/2NW/4, NW/4SW/4 surface to top of Abo formation

0343

1250

Shawnee Federal

FED LC-029020-L

Petroleum Corporation, et al

1/1/1991

Eddy

17S

30E

NW/4SE/4 below 3600’

0351

1249

Sinclair Parke

FED NM-0467930

Atlantic Richfield Company

10/1/1977

Eddy

17S

30E

SE/4NW/4 base of San Andres formation to 7079’

0363

1282

Spruce Federal

FED NM-96836

Chase Oil Corporation

6/1/1996

Eddy

17S

27E

NE/4SW/4 to all depths

0389

1236

State I

ST NM B-1266-9

Leonard and Levers, Inc.

10/14/1932

Eddy

17S

29E

SE/4SE/4 surface to 5000’

0391

1066

State S-19 CP 19

ST NM E-950

Sinclair Oil & Gas Co.

8/10/1946

Eddy

17S

29E

Lot 3 from 2300’ to 10,896’

0392

1068

State S-19 EMP ABO

ST NM E-742

Humble Oil & Refining Co.

2/11/1946

Eddy

17S

29E

SE/4SW/4 as to Abo formation only

0393

1067

State S-19 4

ST NM E-4201-2

Continental Oil Company

9/11/1950

Eddy

17S

29E

SW/4SE/4 as to Abo formation only

0394

1067

State S-19 Paddock

ST NM E-4201-2

Continental Oil Company

9/11/1950

Eddy

17S

29E

SW/4SE/4 surface to top of the Abo formation, N/2SE/4, SE/4SE/4 surface to base of the Abo formation, All of SE/4 as to depths below the base of the Morrow formation

0394

1068

State S-19 Paddock

ST NM E-742

Humble Oil & Refining Co.

2/11/1946

Eddy

17S

29E

SE/4SW/4 as to all depths except the Abo formation, NE/4SW/4 as to all depths

0394

1069

State S-19 Paddock

ST NM B-7677-2

Continental Oil Company

7/11/1938

Eddy

17S

29E

Lot 4 to all depths

0405

1289

Tenneco State

ST NM E-7640

Leonard Oil Company

12/15/1953

Eddy

17S

29E

SW/4SW/4 surface to 5000’

0407

1292

Texaco BE

ST NM B-1565

George F. Getty Oil Co.

11/20/1933

Eddy

17S

30E

N/2NE/4 to all depths

ACCT #

LAND #

PROPERTY

LESSOR

LESSEE

DATE

COUNTY

STATE

SECTION

LANDS

0419

1219

Wallingford State

ST NM B-4109-33

William Spurck

4/10/1935

Lea

17S

32E

NW/4NW/4 surface to 4500’, NE/4NW/4 surface to 4200’

0430

1286

Western Federal

FED LC-028480-A

Arba Green

6/1/1962

Eddy

17S

29E

S/2NE/4 surface to top of Abo formation

0431

1270

White Oak State

ST NM VB-492

Chase Oil Corporation

6/1/1996

Eddy

17S

28E

N/2NE/4, SE/4NE/4, NE/4SE/4, S/2SE/4 to all depths

0432

1274

White Star Federal

FED NM-14840

Phillips Petroleum

6/1/1992

Eddy

17S

29E

N/2N/2, SW/4NE/4 surface to base of the Abo formation, SE/4NE/4, NW/4SE/4 base of San Andres formation to base of the Abo formation

0434

1214

Wichita State

ST NM B-2209

F. William Kutter

12/21/1928

Eddy

17S

30E

NW/4SW/4 below 4000’

0436

1266

Willow State

ST NM B-2613

Humble Oil & Refining Co.

3/10/1934

Eddy

17S

31E

NE/4SE/4 from 4500’ to 5354’, NW/4SE/4 from 4500’ to 5296’, SW/4SE/4 from 4500’ to 6182’, SE/4SE/4 from 4500’ to 5301’

0441

1164

Woolley Federal

FED LC-029342-A

Anadarko Petroleum Corp

7/27/1995

Eddy

17S

30E

E/2SW/4 from 4000’ to 7360’, SW/4SW/4 from 4000’ to the base of the Abo formation

0447

1267

Yucca State

ST NM B-3014

Humble Oil & Refining Co.

6/11/1934

Eddy

17S

31E

NE/4SW/4 from 4500’ to 5309’, NW/4SW/4 from 4500’ to 5544’

0478

1083

Blue Quail State

ST NM V-6500

Chase Oil Corporation

1/1/2002

Eddy

16S

30E

NE/4SE/4, S/2SE/4 to all depths

0581

1470

Johns B

FED LC-058407-B

Weier Drilling Company, Inc.

12/1/1959

Lea

17S

32E

NW/4NE/4 surface to 4500’

0582

1470

Jon Bob

FED LC-058407-B

Weier Drilling Company, Inc.

12/1/1959

Lea

17S

32E

NE/4NW/4 below 4800’

0678

1275

Stingray 10

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

NW/4SE/4 below the base of the Grayburg formation

0766

1335

Panther Federal

FED NM-03428

Wilma Elliott Donahue

2/1/1951

Lea

17S

32E

Lots 3-4, NE/4SW/4 surface to 5000’

0767

1336

Fox Federal

FED LC-029410-B

Carper Drilling Company

7/1/1939

Lea

17S

32E

S/2NE/4, SE/4NW/4, NW/4SE/4 surface to 5000’

0768

1337

Weasel Federal

FED LC-69105

E. N. Brock

6/1/1951

Lea

17S

32E

NE/4SE/4 surface to 5000’

0869

1424

Impala State

ST NM B-2613

Humble Oil & Refining Co.

3/10/1934

Eddy

17S

31E

SW/4SE/4 surface to 5011’, SE/4SE/4 surface to 5007’

0870

M-190

Pearsall Queen Sand Unit Tr 1

FED LC-029403-A

Exxon Corporation

12/1/1959

Lea

18S

32E

S/2NE/4 surface to 5,000 feet

0870

M-190

Pearsall Queen Sand Unit Tr 2 & 2-A

FED LC-029403-B

Hugh L. Johnson, Jr.

11/1/1961

Lea

18S

32E

NE/4NW/4 (Lot 3), NE/4SW/4 surface to 5,000 feet

0870

M-190

Pearsall Queen Sand Unit Tr 3

FED LC-061155-A

Brock Drilling Company

12/1/1959

Lea

18S

32E

N/2NE/4 (Lots 1 & 2) surface to base of Queen formation

0870

M-190

Pearsall Queen Sand Unit Tr 4 & 4-A

FED LC-063345

Frank Brock, et al

11/1/1960

Lea

18S

32E

N/2NW/4 (Lots 3 & 4), SW/4NW/4 surface to base of Queen formation

0870

M-190

Pearsall Queen Sand Unit Tr 5-A

FED LC0061840-A

Minntex Oil Company

11/1/1960

Lea

18S

32E

NW/4NE/4 (Lot 2) surface to 5,000 feet

0870

M-190

Pearsall Queen Sand Unit Tr 6

FED LC-060503

Exxon Corporation

11/1/1960

Lea

18S

32E

SE/4NW/4 surface to 5,000 feet

0870

M-190

Pearsall Queen Sand Unit Tr 7

FED LC-016795

Anadarko Petroleum Company

2/1/1955

Lea

18S

32E

SE/4NW/4 surface to 5,000 feet

0870

M-190

Pearsall Queen Sand Unit Tr 8 & 8-A

FED LC-064098

Nadel & Gussman

12/1/1959

Lea

18S

32E

SE/4SW/4, W/2SE/4 surface to 5,000 feet

0870

M-190

Pearsall Queen Sand Unit Tr 9

FED LC-061153

Exxon Corporation

12/1/1959

Lea

18S

32E

NE/4SE/4 surface to 5,000 feet

0870

M-190

Pearsall Queen Sand Unit Tr 15

ST NM OG-5119

Gulf Oil Corporation

2/17/1959

Lea

17S

32E

SE/4SW/4 surface to 5,000 feet

0870

M-190

Pearsall Queen Sand Unit Tr 16

FED LC-059255

Petroleum Synergy Group

11/1/1960

Lea

18S

32E

NE/4SW/4 surface to 5,000 feet

0871

1431

Walker Federal

FED NM-40450

Bradley Panos

2/1/1972

Lea

18S

32E

SW/4NW/4 surface to 5101’, NW/4SW/4 surface to 5080’, SW/4SW/4 surface to 5141’

0872

1432

Bassett Birney

FED LC-061154

H. W. Walker

12/22/1939

Lea

18S

32E

Lot 4 surface to 5000’

0874

M-191

Red Lake Sand Unit Tr 1

FED NMLC-028456

George L. Stephens

12/30/1938

Eddy

17S

28E

SE/4SE/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 2

FED NMLC-028456

George L. Stephens

12/30/1938

Eddy

17S

28E

SE/4NE/4 surface to base of Premier Sand

ACCT #

LAND #

PROPERTY

LESSOR

LESSEE

DATE

COUNTY

STATE

SECTION

LANDS

0874

M-191

Red Lake Sand Unit Tr 3

FED NMLC-046250-A

American Petrofina Co., et al

4/1/1968

Eddy

17S

28E

SW/4NW/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 4

FED NMLC-046250-B

J. C. Williams

4/12/1938

Eddy

17S

28E

SE/4NW/4, SW/4NE/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 4-A

FED NMLC-046250-B

J. C. Williams

4/12/1938

Eddy

17S

28E

SW/4NW/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 5

FED NMLC-048479-A

Tenneco Oil Company, et al

9/1/1969

Eddy

17S

28E

NW/4NE/4, SE/4NW/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 6

FED NMLC-048479-B

Delhi-Taylor Corporation

11/1/1961

Eddy

17S

28E

NE/4NW/4, SW/4NW/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 7

FED NMLC-065729

Joe D. Reid

9/20/1939

Eddy

17S

28E

NE/4NE/4, SW/4NE/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 8

ST NM 647-387

Martin Yates, Jr.

11/14/1922

Eddy

17S

28E

NW/4NW/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 9

ST NM 636-64

Frank Tigner

8/1/1922

Eddy

17S

28E

NW/4SW/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 10

ST NM B-1111-9

Van P. Welch, Jr.

8/10/1932

Eddy

17S

28E

NW/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 10-A

ST NM B-1111-9

Van P. Welch, Jr.

8/10/1932

Eddy

17S

28E

NW/4NE/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 11

ST NM B-1969-32

Van P. Welch, Jr.

6/10/1933

Eddy

17S

28E

NE/4SW/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 12

ST NM B-1969-31

Van P. Welch, Jr.

6/10/1933

Eddy

17S

28E

NW/4SW/4, SE/4SW/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 12

ST NM B-1969-31

Van P. Welch, Jr.

6/10/1933

Eddy

17S

28E

SW/4SW/4 Premier Sand only

0874

M-191

Red Lake Sand Unit Tr 12

ST NM B-1969-31

Van P. Welch, Jr.

6/10/1933

Eddy

17S

28E

SW/4SE/4 from 800’ to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 13

ST NM B-1969-30

Van P. Welch, Jr.

6/10/1933

Eddy

17S

28E

NW/4SE/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 14

ST NM B-2178-13

Van Thompson

10/10/1933

Eddy

17S

28E

SW/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 15

ST NM B-3149-8

F. M. Hartley

8/16/1934

Eddy

17S

28E

N/2SE/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 16

ST NM B-4456-13

Manuel A. Sanchez

6/10/1935

Eddy

17S

28E

N/2SE/4, SW/4SE/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 17

ST NM B-5084-140

Charles A. Piatt

10/10/1935

Eddy

17S

28E

NE/4NE/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 18

ST NM B-5084-142

Charles A. Piatt

10/10/1935

Eddy

17S

28E

NE/4NE/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 19

ST NM B-5084-142

Charles A. Piatt

10/10/1935

Eddy

17S

28E

NW/4NE/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 20

ST NM B-8435-8

The Petroleum Producers Co.

12/11/1939

Eddy

17S

28E

S/2SE/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 21

ST NM B-8814-10

F. D. Shufflebarger

9/10/1940

Eddy

17S

28E

SE/4NE/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 22

ST NM B-11538-12

Southern Union Gas Company

10/10/1944

Eddy

17S

28E

SW/4NE/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 23

ST NM B-11538-8

Southern Union Gas Company

10/10/1944

Eddy

17S

28E

NW/4NE/4, NE/4NW/4 surface to base of Premier Sand

0874

M-191

Red Lake Sand Unit Tr 24

ST NM B-6945-2

Eugene E. Nearburg

2/10/1953

Eddy

17S

28E

SE/4NE/4 surface to base of Premier Sand

0882

1139

Pearsall A

FED LC-059001

Paul Love

9/22/1939

Lea

17S

32E

N/2, NE/4SE/4, S/2SE/4 surface to base of Queen formation, NW/4SE/4 surface to base of San Andres formation

0894

1469

Rhino Federal

FED LC-058698-B

Pearl Miller

8/11/1939

Lea

17S

32E

SW/4NW/4 surface to base of San Andres formation

0900

1470

Anteater Federal

FED LC-058407-B

Weier Drilling Company, Inc.

12/1/1959

Lea

17S

32E

NE/4NE/4 surface to 4800’, NW/4NE/4 below 4500’, S/2NE/4 to all depths

0918

1491

Elliot 31 Federal

FED NM-0349953

L. E. Elliott

8/1/1949

Lea

24S

38E

SW/4NW/4 surface to 8800’

0918

1491

Elliot 31 Federal

FED LC-06952

L. E. Elliott

8/1/1949

Lea

24S

38E

NW/4NW/4 surface to 8800’ less the unitized interval of the West Dollarhide Queen Unit

0919

1492

State 20

ST NM B-2388

Phillips Petroleum

1/10/1934

Lea

17S

35E

NE/4SE/4 surface to 4966’

1116

1027

Reindeer Federal

FED NMNM-100844

Chase Oil Corporation

6/1/1998

Eddy

16S

28E

All from the surface to the base of the Wolfcamp formation

ACCT #

LAND #

PROPERTY

LESSOR

LESSEE

DATE

COUNTY

STATE

SECTION

LANDS

1117

M-191

Raptor State

ST NM B-1969-31

Van P. Welch, Jr.

6/10/1933

Eddy

17S

28E

SW/4SW/4 surface to top of Premier sand formation

1127

1526

New Mexico Z State

ST NM OG-784

Sunray Mid-Continent Oil Co.

4/16/1957

Eddy

19S

28E

N/2NE/4 surface to 3000’

1132

1553

Welch Federal

FED LC-067739

Shell Oil Company

12/1/1938

Eddy

16S

31E

Lot 1, NE/4NW/4 surface to 4000’

1214

1082

Dove State

ST NM V-6499

Chase Oil Corporation

1/1/2002

Eddy

16S,

29E

W/2SE/4, SE/4SE/4 to all depths

1236

1625

Alscott Federal

FED NMNM-56426

Alscott Oil Company

8/1/1950

Eddy

18S

29E

NE/4SE/4 surface to 3000’, SE/4NE/4 surface to 3638’

1237

1627

RV State

ST NM L-6518

Aztec Oil & Gas Company

9/1/1971

Eddy

18S

29E

SW/4NW/4 surface to 3050, NW/4NW/4 surface to 3585, SW/4NE/4 surface to 3230’

1238

1610

Brewer Federal

FED NM-0556811

Nola M. Brewer

8/1/1950

Eddy

16S

29E

NW/4SE/4, SE/4SW/4 surface to base of San Andres formation

1239

1613

Carper Levers State

ST NM B-2071

Forest E. Levers

8/10/1933

Eddy

17S

28E

NE/4SW/4, SW/4SW/4 surface to top of Lovington Sand formation

1240

1612

Davis Federal

FED NMLC-068677

Paul L. Davis

7/1/1949

Eddy

16S

29E

NW/4 surface to base of the Queen formation

1241

1623

Denton Federal

FED NMLC-067132

A. H. Hover Estate

8/1/1948

Eddy

18S

29E

SE/4SE/4 surface to 2362’

1241

1623

Denton Federal

FED NMLC-067132

A. H. Hover Estate

8/1/1948

Eddy

18S

29E

SE/4SW/4 surface to 3196’, NE/4SW/4 surface to 3240’

1241

1623

Denton Federal

FED NMLC-067132

A. H. Hover Estate

8/1/1948

Eddy

18S

29E

NE/4NW/4 surface to 3115’, NE/4SW/4 surface to 2858’, SE/4NW/4 surface to 3187’

1242

1630

East High Lonesome Federal

FED NMLC-061638

Nola M. Brewer

8/1/1950

Eddy

16S

29E

SE/4SE/4 surface to base of San Andres formation

1242

1630

East High Lonesome Federal

FED NMLC-061638

Nola M. Brewer

8/1/1950

Eddy

16S

29E

S/2S/2 surface to base of San Andres formation

1242

1630

East High Lonesome Federal

FED NMLC-061638

Nola M. Brewer

8/1/1950

Eddy

16S

29E

NW/4, N/2SW/4, N/2NE/4, SW/4NE/4 surface to base of the San Andres formation

1242

1630

East High Lonesome Federal

FED NMLC-061638

Nola M. Brewer

8/1/1950

Eddy

16S

29E

N/2, SW/4 surface to base of San Andres formation

1242

1631

East High Lonesome Federal

FED NMLC-067610-A

I. W. Bosworth

7/1/1949

Eddy

16S

29E

SE/4 surface to base of the San Andres formation

1243

1616

Adams Federal

FED NM-21888

Atlantic Richfield Company

5/1/1994

Eddy

17S

29E

E/2SW/4, W/2SE/4 surface to 3480’

1244

1611

Farmer Federal

FED NMLC-061622

Maxine Bunting Farmer

6/1/1950

Eddy

16S

29E

NE/4SE/4 surface to base of San Andres formation

1245

1632

High Lonesome Penrose Unit

FED NM-05523

Blanche McCallister

9/1/1951

Eddy

16S

29E

N/2NE/4, SW/4NE/4, N/2SE/4, SE/4SE/4 surface to 2120’

1245

1633

High Lonesome Penrose Unit

ST NM B-2885

A. B. Swain

5/10/1934

Eddy

16S

29E

SE/4NE/4 surface to 2095

1246

1626

VS Unit

ST NM K-2646-1

Cosden Petroleum Corporation

8/21/1962

Eddy

18S

31E

N/2NW/4 from 3110’ to 3162’

1246

1634

VS Unit

FED NMLC-070133

R. D. Collier

12/1/1969

Eddy

18S

31E

S/2SE/4 surface to 3570’

1246

1635

VS Unit

FED NMLC-029389-C

E. A. Patton Estate

8/1/1969

Eddy

18S

31E

S/2SW/4 surface to 4000’

1246

1636

VS Unit

FED NMNM-17157

MNA Enterprises Ltd. Co.

8/1/1999

Eddy

18S

31E

N/2SW/4 surface to 4000’

1246

1637

VS Unit

ST NM E-882

Magnolia Petroleum Company

6/10/1946

Eddy

18S

31E

SW/4NW/4 surface to 3570’

1246

1638

VS Unit

FED NMLC-07134

Mrs. Jim E. Collier, Executrix

9/1/1970

Eddy

18S

31E

SE/4NW/4 surface to 3570’

1246

1639

VS Unit

FED NM-042819

Texaco Expl & Prod Inc.

9/1/2000

Eddy

18S

31E

NE/4NW/4 surface to 3570’

1246

1640

VS Unit

FED NMLC-029393-C

Apco Oil Corporation

12/1/1969

Eddy

18S

31E

NE/4 surface to 3570’

1247

1615

Jackson Federal

FED NM-21887

Atlantic Richfield Company

5/1/1984

Eddy

17S

29E

SE/4SE/4, surface to 3480’

1247

1615

Jackson Federal

FED NM-21887

Atlantic Richfield Company

5/1/1984

Eddy

17S

29E

NW/4SW/4 surface to 3480’

1248

1614

Tyler Federal

FED NM-21886

American Republics Corp

6/1/1946

Eddy

17S

29E

SE/4SW/4, S/2SE/4 surface to 3480’

ACCT #

LAND #

PROPERTY

LESSOR

LESSEE

DATE

COUNTY

STATE

SECTION

LANDS

1249

1628

S & T State

ST NM K-4795

John H. Trigg

3/16/1965

Eddy

18S

29E

SE/4NE/4, NW/4NE/4 surface to 3225’, SE/4NW/4 surface to 3025, NE/4SW/4 surface to 3500’

1250

1622

State CA

ST NM B-2130

H. R. Kennedy

9/11/1933

Eddy

17S

30E

NW/4NW/4 surface to base of the Grayburg formation

1251

1625

Sivley Federal

FED NM-56426

Alscott Oil Company

8/1/1950

Eddy

18S

29E

NE/4NE/4 surface to 3000’

1252

1629

Wilson Federal

FED NM-015068

Charles B. Gonzales

8/1/1954

Eddy

18S

29E

NW/4NW/4 surface to 2556’

1253

1624

YD Federal

FED NMLC-067348

Dixon and Yates Oil Company

7/1/1949

Eddy

18S

29E

NE/4NW/4 surface to 3329’, SE/4NW/4 surface to 2126’

1254

1621

Westall A State

ST NM B-2023

Snowden & McSweeney Co.

7/10/1933

Eddy

17S

29E

S/2NE/4, N/2SE/4 surface to 3600’

1255

1621

Westall B State

ST NM B-2023

Snowden & McSweeney Co.

7/10/1933

Eddy

17S

29E

SW/4NW/4 surface to 3600’

1256

1617

RJ Unit

FED NMLC-028775-A

Sinclair Oil & Gas Co.

9/1/1969

Eddy

17S

29E

SE/4 surface to 3480’

1256

1617

RJ Unit

FED NMLC-028775-A

Sinclair Oil & Gas Co.

9/1/1969

Eddy

17S

29E

NE/4 surface to 3480’

1256

1617

RJ Unit

FED NMLC-028775-A

Sinclair Oil & Gas Co.

9/1/1969

Eddy

17S

29E

W/2NW/4 surface to 3480’

1256

1618

RJ Unit

FED NMLC-028775-B

American Republics Corp

6/1/1946

Eddy

17S

29E

NE/4, E/2W/2 surface to 3480’

1256

1618

RJ Unit

FED NMLC-028775-B

American Republics Corp

6/1/1946

Eddy

17S

29E

NE/4, E/2NW/4, NE/4SW/4, N/2SE/4 surface to 3480’

1256

1619

RJ Unit

FED NMLC-067910

Sinclair Oil & Gas Co.

5/1/1964

Eddy

17S

29E

NE/4SE/4 surface to 3480’

1256

1620

RJ Unit

FED NMLC-069147

Sinclair Oil & Gas Co.

5/1/1964

Eddy

17S

29E

NE/4NW/4 surface to 3480’

Part II: Grantor’s Non-Operated Interests

0095

1146

Dalton Federal

FED NM-14840

Phillips Petroleum

6/1/1992

Eddy

17S

29E

SE/4NE/4 surface to base of San Andres formation

0490

1055

Aid State Com

ST NM K-3630

Sinclair Oil & Gas Company

10/15/1963

Eddy

17S

28E

NE/4 2300’ to 10896’

0490

1055

Aid State Com

ST NM K-3630

Sinclair Oil & Gas Company

10/15/1963

Eddy

17S

28E

NE/4, E/2NW/4 2300’ to 10896’

0505

1051

Bluitt 8 Federal

FED NMNM-100871

Scott Exploration Inc.

6/1/1998

Roos

37E

S/2 surface to base of San Andres formation

0512

1061

Bridge Delhi A State

ST NM B-4575-6

Marsha Hertzmark

7/10/1935

Eddy

17S

28E

NW/4NW/4 2100’ to top of Abo formation

0513

1660

Buckeye State

ST NM B-2388

Phillips Petroleum

1/10/1934

Lea

17S

35E

SW/4NE/4

0513

1661

Buckeye State

ST NM K-4549

Robert B. Gates

11/17/1964

Lea

17S

35E

SE/4NE/4

0525

1279

Crystal

FED NM-81910

Bill Fenn

9/1/1989

Eddy

24S

26E

Lots 1-2, S/2NE/4, SE/4 to all depths

0540

M-164

Empire Abo Unit

ST NM B-4575-6

Marsha Hertzmark

7/10/1935

Eddy

17S

28E

NW/4NW/4 top of Abo formation to 6315’

0540

M-164

Empire Abo Unit

ST NM E-4201

Continental Oil Company

9/11/1950

Eddy

17S

29E

Lots 2-3, SE/4NW/4 Abo formation only

0540

M-164

Empire Abo Unit

FED NM-29281

General American Oil Co.

6/1/1972

Eddy

17S

29E

S/2NW/4, NW/4SW/4 top of Abo formation to 6550’

0540

M-164

Empire Abo Unit

FED LC-028480-A

Arba Green

6/1/1962

Eddy

17S

29E

S/2NE/4 top of Abo formation to 6550’

0542

M-165

Empire South Deep Unit

FED LC-062407

Mable F. Leonard

1/1/1944

Eddy

17S

29E

S/2SE/4 below base of Abo formation

0542

M-165

Empire South Deep Unit

ST NM-647

Martin Yates, Jr.

11/14/1922

Eddy

17S

28E

NE/4 base of the Abo to 10710’

0542

M-165

Empire South Deep Unit

FED NM-29267

Arba Green

6/1/1962

Eddy

17S

29E

N/2NE/4 below base of Abo formation

0542

M-165

Empire South Deep Unit

FED LC-028480-A

Arba Green

6/1/1962

Eddy

17S

29E

S/2NE/4 below 6550’

ACCT #

LAND #

PROPERTY

LESSOR

LESSEE

DATE

COUNTY

STATE

SECTION

LANDS

0542

M-165

Empire South Deep Unit

FED NM-0555569

General American Oil Co.

12/1/1961

Eddy

17S

29E

NW/4 below 2725’, NW/4NE/4 and S/2NE/4 below 2790’, Lot 3 below the base of the San Andres formation, N/2SE/4 and NE/4NE/4 to all depths, NE/4SW/4 below 2725’

0544

1068

Empire 20 State #1

ST NM E-7640

Leonard Oil Company

12/15/1953

Eddy

17S

29E

SW/4SW/4 below 5000’

0548

1194

Exxon State

ST NM 647-55

Martin Yates, Jr.

11/14/1992

Eddy

18S

28E

S/2NW/4 3000’ to base of the Morrow formation

0549

1226

Gavilon Federal

FED NM-57683

Arrowhead Oil

1/1/1984

Lea

20S

33E

All, to all depths

0556

M-150

Grizzly Bear State Com

See Crow Flat Working Interest Unit

0563

M-150

High Mesa State Com

See Crow Flat Working Interest Unit

0564

M-150

High Nitro State Com #1

See Crow Flat Working Interest Unit

0572

M-150

Huggie Bear State Com #1

See Crow Flat Working Interest Unit

0587

M-150

Kodiak Bear State Com #1

See Crow Flat Working Interest Unit

0592

M-167

Liberty 4 Com

Lee Carter

Charles B. Read

3/30/1954

Lea

20S

36E

N/2SW/4 to 13730’

0592

M-167

Liberty 4 Com

Frank Hewes

Charles B. Read

3/30/1954

Lea

20S

36E

N/2SW/4 to 13730’

0592

M-167

Liberty 4 Com

Jim Hughes

Charles B. Read

3/30/1954

Lea

20S

36E

N/2SW/4 to 13730’

0592

M-167

Liberty 4 Com

John H. Ware

Charles B. Read

3/30/1954

Lea

20S

36E

N/2SW/4 to 13730’

0592

M-167

Liberty 4 Com

G. H. Vaughn

Charles B. Read

3/30/1954

Lea

20S

36E

N/2SW/4 to 13730’

0592

M-167

Liberty 4 Com

Ruby Hard

Charles B. Read

3/30/1954

Lea

20S

36E

N/2SW/4 to 13730’

0592

M-167

Liberty 4 Com

Guy H. Hooper

J. Don Hudgens

3/30/1954

Lea

20S

36E

N/2SW/4 to 13730’

0592

M-167

Liberty 4 Com

Harry S. Wright

J. Don Hudgens

3/30/1954

Lea

20S

36E

N/2SW/4 to 13730’

0601

1136

MJ Harvey

ST NM VA-814

M. J. Harvey, Jr.

2/1/1993

Lea

17S

34E

E/2NE/4 surface to 100’ below the base of the Abo formation

0605

1262

Meredith State

ST NM B-2531

Southern Petroleum Expl.

2/10/1934

Lea

17S

35E

N/2, NW/4SW/4, E/2SW/4, W/2SE/4 as to any depths owned

0615

1202

Muskegon 17 State Com #1

FED NM-0397623

Leonard Oil Company

7/7/1949

Eddy

17S

29E

N/2SW/4 below 5000’

0148

1239

Muskegon 17 State Com #1

ST NM B-10714

D. E. Wallace

10/11/1943

Eddy

17S

29E

SW/4SW/4, N/2SE/4 below 5000’

0616

1236

Muskegon 20 State Com #1

ST NM B-1266

Leonard and Levers Inc.

10/14/1932

Eddy

17S

29E

NW/4SE/4, SE/4SE/4 below 5000’

0617

1159

Rustler Bluff Milano State #1

ST NM V-4137

Energex Company

4/1/1933

Eddy

24S

28E

NE/4 to all depths

0623

1140

Osceola State #1

ST NM V-3743

Yates Petroleum Corporation

6/1/1991

Eddy

25S

28E

SE/4NE/4 surface to 6400’

0624

1659

Oxy 33 Federal #1

FED NM-0428657

T. A. Fraser, et al

9/1/1963

Eddy

19S

28E

S/2 to the base of the Morrow formation

0634

M-150

Polar Bear State Com #1

See Crow Flat Working Interest Unit

0642

M-240

Ross Draw 25

FED NM-35607

Susan Dawson

3/1/1979

Eddy

26S

29E

E/2NW/4, SW/4NW/4, SW/4 to all depths below the Delaware Mountain Group formation

0642

M-240

Ross Draw 25

FED NM-41646

Getty Oil Company

11/1/1980

Eddy

26S

29E

NW/4NW/4 to all depths below the Delaware Mountain Group formation

0650

1280

Seminole Federal

FED NM-16104

Polly V. Tharp

2/1/1973

Eddy

25S

28E

NW/4NE/4 surface to 6529’, SW/4NE/4 surface to 6550, NW/4SE/4 surface to 5291’

0657

1275

Shell State

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

SW/4NW/4 surface to base of the Grayburg formation

0658

1275

Shell A State

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

SE/4NE/4 surface to base of the Grayburg formation

0659

1275

Shell State 9

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

SW/4NE/4 surface to base of the Grayburg formation

ACCT #

LAND #

PROPERTY

LESSOR

LESSEE

DATE

COUNTY

STATE

SECTION

LANDS

0661

M-141

Skelly Unit Paddock

FED LC-029420-B

Skelly Oil Company

4/30/1938

Eddy

17S

31E

All below the base of the San Andres formation

0661

M-141

Skelly Unit Paddock

FED LC-029420-B

Skelly Oil Company

4/30/1938

Eddy

17S

31E

N/2 below the base of the San Andres formation

0661

M-141

Skelly Unit Paddock

FED LC-029418-B

Skelly Oil Company

4/30/1938

Eddy

17S

31E

N/2 base of the San Andres formation to the base of the Wolfcamp formation, S/2 below the base of the San Andres formation

0661

M-141

Skelly Unit Paddock

FED LC-029418-B

Skelly Oil Company

4/30/1938

Eddy

17S

31E

N/2 below the base of the San Andres formation

0661

M-141

Skelly Unit Paddock

FED LC-029418-B

Skelly Oil Company

4/30/1938

Eddy

17S

31E

S/2 below the base of the San Andres formation

0661

M-141

Skelly Unit Paddock

FED LC-029418-B

Skelly Oil Company

4/30/1938

Eddy

17S

31E

All below the base of the San Andres formation

0661

M-141

Skelly Unit Paddock

FED LC-029419-B

Skelly Oil Company

5/13/1929

Eddy

17S

31E

N/2 below the base of the San Andres formation

0661

M-141

Skelly Unit Paddock

FED LC-029419-A

Skelly Oil Company

1/2/1929

Eddy

17S

31E

All below the base of the San Andres formation

0661

M-141

Skelly Unit Paddock

FED LC-029420-A

Skelly Oil Company

4/30/1938

Eddy

17S

31E

All below the base of the San Andres formation

0661

M-141

Skelly Unit Paddock

FED LC-029418-A

Skelly Oil Company

4/30/1938

Eddy

17S

31E

S/2 below the base of the San Andres formation

0661

M-141

Skelly Unit Paddock

FED LC-029418-A

Skelly Oil Company

4/30/1938

Eddy

17S

31E

N/2 below the base of the San Andres formation

0666

1264

South Empire State 1

ST NM B-5862

Ralph Gallinger

2/10/1936

Eddy

17S

28E

NE/4SW/4 2300’ to 10896’

0666

1264

South Empire State 1

ST NM B-6251

Ed W. Owen

4/11/1936

Eddy

17S

28E

SE/4 2300’ to 10896’

0684

1099

Texmack 11

FED LC-029418-B

Skelly Oil Company

4/30/1938

Eddy

17S

31E

N/2 below the base of the Wolfcamp formation

0687

M-146

Texmack 2 State Com

ST NM E-5668

Tidewater Assc. Oil Co.

10/10/1951

Eddy

17S

31E

Lot 1, SE/4NE/4, SW/4NW/4, W/2SW/4 below 3861’

0687

M-146

Texmack 2 State Com

ST NM B-10920

Olen F. Featherstone

1/10/1944

Eddy

17S

31E

Lots 2-3-4, SW/4NE/4, SE/4NW/4 below 3900’, SE/4SW/4 below 3946’

0687

M-146

Texmack 2 State Com

ST NM B-3635

A. Franklin Swartz

12/10/1934

Eddy

17S

31E

NE/4SW/4 below 3946’

0687

M-146

Texmack 2 State Com

ST NM B-2613

Humble Oil and Refining Co.

3/10/1934

Eddy

17S

31E

E/2SE/4 from 3845’ to 12265’, W/2SE/4 from 3924’ to 12265’

0690

M-140

Texmack 5

ST NM V-5231

Rolla R. Hinkle

1/1/1998

Lea

16S

32E

SW/4, N/2SE/4 to all depths

0690

M-140

Texmack 5

ST NM B-11078

Gulf Oil Corporation

3/10/1944

Lea

16S

32E

S/2SE/4 to all depths

0696

M-134

Texmack 36 State Com #1

ST NM B-161

The Texas Company

8/14/1931

Eddy

16S

31E

NE/4 below 100’ below base of Lovington Sand formation

0696

M-134

Texmack 36 State Com #1

ST NM B-5300

Continental Oil Company

6/11/1951

Eddy

16S

31E

NW/4NW/4 below 4095’, SW/4NW/4 and NE/4NW/4 below 4136’

0736

1328

Travis Bassett Birney 1

FED NM-54184

Depco Inc., et al

12/1/1973

Eddy

18S

29E

Lots 3-4, E/2SW/4

0736

1658

Travis Bassett Birney 1

FED NM-14841

Depco Inc., et al

6/1/1969

Eddy

18S

29E

SW/4SE/4 below 4000’

0736

1329

Travis Bassett Birney 1

FED NM-14842

Bassett Birney Oil Corporation

6/1/1969

Eddy

18S

29E

N/2SE/4 to all depths except the unitized interval of the Ballard Grayburg San Andres Unit

0753

M-175

West Vacuum Unit

ST NM B-10784

Stanolind Oil and Gas Company

11/10/1943

Lea

18S

34E

SE/4NW/4 as to the Grayburg and San Andres formations only

0753

M-175

West Vacuum Unit

ST NM B-10784

Stanolind Oil and Gas Company

11/10/1943

Lea

18S

34E

Lot 4 as to the Grayburg and San Andres formations only

0753

M-175

West Vacuum Unit

ST NM B-11469

Stanolind Oil and Gas Company

9/11/1944

Lea

18S

34E

Lot 4 as to the Grayburg and San Andres formations only

0753

M-175

West Vacuum Unit

ST NM B-11469

Stanolind Oil and Gas Company

9/11/1944

Lea

18S

34E

Lot 1 as to the Grayburg and San Andres formations only

0758

M-241

Yates Federal 8

FED NM-31649

Van G. Nelson

1/1/1979

Eddy

26S

30E

W/2 surface to 12,762’

0759

M-150

Yogi Bear State Com 1

See Crow Flat Working Interest Unit

1152

M-217

Dodd Federal Unit

FED NMLC-028731-A

Sunray DX Oil Company

7/1/1963

Eddy

17S

29E

S/2SW/4, NW/4SW/4 surface to 5000’

ACCT #

LAND #

PROPERTY

LESSOR

LESSEE

DATE

COUNTY

STATE

SECTION

LANDS

1152

M-217

Dodd Federal Unit

FED NMLC-028731-A

Sunray DX Oil Company

7/1/1963

Eddy

17S

29E

SE/4 surface to 4000’

1152

M-217

Dodd Federal Unit

FED NMLC-028731-A

Sunray DX Oil Company

7/1/1963

Eddy

17S

29E

NE/4NE/4, S/2NE/4, NE/4SE/4 surface to 4000’, S/2SE/4, NW/4SE/4, SE/4SW/4 surface to 5000’

1048

Crow Flat Working Interest Unit

ST NM V-3138-2

Pacific Enterprises Oil Company

11/1/1989

Eddy

17S

28E

SE/4NE/4, N/2SE/4, SE/4SE/4 as to depths below the base of the Wolfcamp formation

1277

Crow Flat Working Interest Unit

ST NM V-5009

Chase Oil Corporation

1/1/1997

Eddy

17S

28E

NW/4NW/4, N/2SW/4, SW/4SE/4 to all depths

1278

Crow Flat Working Interest Unit

ST NM V-5344

Chase Oil Corporation

8/1/1998

Eddy

17S

28E

E/2SW/4 to all depths

The Crow Flat Working Interest Unit covers All of Section 1, E/2 of Section 2, and All of Section 12, T17S, R28E, Eddy County, New Mexico.

Part III: Grantor’s Non-Producing Interests

0004

1002

Non Producing

FED NMLC-029020-M

Texaco Expl & Prod Inc.

11/1/1991

Eddy

17S

30E

Lots 3-4, S/2NW/4 below 4000’

0006

1004

Non Producing

FED NMNM-0467931

Texaco Expl & Prod Inc.

11/1/1991

Eddy

17S

30E

N/2 below 4000’

0021

1007

Non Producing

FED NMNM-103871

Chase Oil Corporation

3/1/2000

Eddy

16S

28E

SE/4SW/4, SW/4SE/4 to all depths

0021

1007

Non Producing

FED NMNM-103871

Chase Oil Corporation

3/1/2000

Eddy

16S

28E

N/2SE/4, SW/4SE/4 to all depths, NE/4 below the base of the Morrow formation

1010

Non Producing

ST NM V-6329

Chase Oil Corporation

8/1/2001

Lea

17S

33E

Lots 1-2-3-4, S/2N/2 to all depths

1011

Non Producing

ST NM V-6330

Chase Oil Corporation

8/1/2001

Lea

17S

33E

S/2 to all depths

1012

Non Producing

ST NM V-6331

Chase Oil Corporation

8/1/2001

Lea

17S

33E

S/2 to all depths

1015

Non Producing

FED LC-065561

Kennedy Oil Company

11/1/1981

Eddy

16S

31E

NW/4NE/4 3929’ to 5000’, SW/4NE/4 200’ below base of the Lovington Sand formation to 5000’

0466

1018

Non Producing

FED NMNM-106917

Chase Oil Corporation

9/1/2001

Lea

17S

33E

Lots 1-3-4, E/2 SW/4 to all depths

0036

1021

Non Producing

FED NMNM-103598

Chase Oil Corporation

12/1/1999

Eddy

16S

27E

N/2NW/4, SW/4SW/4 to all depths

0036

1025

Non Producing

FED NMNM-103872

Chase Oil Corporation

3/1/2000

Eddy

16S

28E

Lots 1-2, E/2NW/4 below the base of the Morrow formation, Lots 3-4, E/2SW/4 to all depths

0036

1025

Non Producing

FED NMNM-103872

Chase Oil Corporation

3/1/2000

Eddy

16S

28E

Lots 1 and 4, S/2NE/4, E/2SW/4 to all depths

0036

1025

Non Producing

FED NMNM-103872

Chase Oil Corporation

3/1/2000

Eddy

16S

28E

Lots 1-2, E/2NW/4 to all depths

0036

1026

Non Producing

FED NMNM-101593

Chase Oil Corporation

12/1/1998

Eddy

16S

28E

Lot 8 to all depths

0036

1026

Non Producing

FED NMNM-101593

Chase Oil Corporation

12/1/1998

Eddy

16S

28E

NW/4, E/2SW/4 below the base of the Morrow formation

0036

1028

Non Producing

FED NMNM-103600

Chase Oil Corporation

12/1/1999

Eddy

16S

28E

SE/4SW/4 to all depths

0036

1029

Non Producing

FED NMNM-104675

Chase Oil Corporation

6/1/2000

Eddy

16S

28E

W/2E/2 to all depths

0036

1033

Non Producing

FED NMNM-103873

Chase Oil Corporation

3/1/2000

Eddy

16S

28E

SE/4 to all depths

0029

1035

Non Producing

FED LC-028936-G

Enron Oil & Gas Company

2/1/1990

Eddy

17S

30E

NW/4NW/4 5000’ to base of the Abo formation

1034

Non Producing

FED LC-028936-B

Enron Oil & Gas Company

11/1/1991

Eddy

17S

30E

E/2NW/4 5000’ to base of the Abo formation

0340

1047

Non Producing

ST NM E-379-5

Burnham Oil Company

6/11/1945

Eddy

17S

27E

SW/4SW/4 2000’ to 5000’

1057

Non Producing

FED LC-029342-H

Enron Oil & Gas Company

3/1/1994

Eddy

17S

30E

NW/4SW/4 surface to the base of the Abo formation

0467

1070

Non Producing

FED NMNM-107380

Chase Oil Corporation

12/1/2001

Chaves

15S

29E

Lots 1-2-3-4, S/2NE/4, SW/4 to all depths

ACCT #

LAND #

PROPERTY

LESSOR

LESSEE

DATE

COUNTY

STATE

SECTION

LANDS

0468

1071

Non Producing

FED NMNM-107381

Chase Oil Corporation

12/1/2001

Chaves

15S

29E

E/2NW/4 to all depths

0469

1072

Non Producing

FED NMNM-107386

Chase Oil Corporation

12/1/2001

Eddy

16S

30E

SW/4 to all depths

0470

1073

Non Producing

FED NMNM-107387

Chase Oil Corporation

12/1/2001

Eddy

16S

30E

SE/4 to all depths

0477

1082

Non Producing

ST NM V-6499

Chase Oil Corporation

1/1/2002

Eddy

16S

29E

W/2SE/4, SE/4SE/4 to all depths

1108

Non Producing

FED NMNM-102037

Daniel E. Gonzales

3/1/1999

Eddy

16S

31E

S/2SE/4 to all depths except the unitized interval of the North Square Lake Unit

1108

Non Producing

FED NMNM-102037

Daniel E. Gonzales

3/1/1999

Eddy

16S

31E

NE/4SE/4 to all depths except the unitized interval of the North Square Lake Unit

1109

Non Producing

FED NMNM-102038

Daniel E. Gonzales

3/1/1999

Eddy

16S

31E

W/2W/2 to all depths

1144

Non Producing

ST NM B-2178

Van Thompson

10/10/1933

Eddy

17S

28E

NE/4NW/4 surface to 1689’

0471

1152

Non Producing

FED NMNM-108038

Chase Oil Corporation

3/1/2002

Eddy

16S

27E

W/2SE/4 to all depths

1168

Non Producing

ST NM E-6005

Pure Oil Company

2/11/1952

Lea

19S

34E

NE/4SW/4 surface to 5110’ less 3850’ to 4090’, NW/4SW/4 surface to 5400’

0194

1169

Non Producing

ST NM-5313

Gulf Oil Corporation

6/11/1951

Eddy

17S

27E

SW/4SE/4 surface to base of Drinkard formation

0195

1169

Non Producing

ST NM-5313

Gulf Oil Corporation

6/11/1951

Eddy

18S

27E

SW/4SW/4 surface to base of Drinkard formation

0339

1172

Non Producing

ST NM E-1059

Eddy

17S

27E

SW/4NE/4 2000’ to 5000’

0308

1197

Non Producing

FED NMNM-2507

Mrs. Pauline Trigg

1/1/1951

Eddy

16S

31E

Lot 13 surface to 100’ below base of Premier sand formation

1225

Non Producing

FED LC-058395

M. E. Baish

5/15/1934

Lea

17S

32E

S/2SE/4, NE/4SE/4 base of San Andres formation to the top of the Wolfcamp formation

0170

1233

Non Producing

ST NM B-255-11

E. Ruth Piatt

9/10/1931

Eddy

17S

29E

SW/4SW/4 below 5000’

0170

1233

Non Producing

ST NM B-255-11

E. Ruth Piatt

9/10/1931

Eddy

17S

29E

NW/4NW/4, S/2SW/4, SE/4SE/4, NW/4SW/4 below 5000’

0170

1233

Non Producing

ST NM B-255-11

E. Ruth Piatt

9/10/1931

Eddy

17S

29E

SE/4, SE/4SW/4 below 5000’

0170

1234

Non Producing

ST NM B-514-10

Leonard and Levers Inc.

12/14/1931

Eddy

17S

29E

N/2SW/4, SW/4SW/4 below 5000’

0170

1235

Non Producing

ST NM B-1266-8

Leonard and Levers Inc.

10/14/1932

Eddy

17S

29E

E/2NW/4, N/2SW/4, SW/4SW/4 below 5000’

0170

1236

Non Producing

ST NM B-1266-9

Leonard and Levers Inc.

10/14/1932

Eddy

17S

29E

S/2NE/4, E/2W/2, SE/4 below 5000’

0170

1236

Non Producing

ST NM B-1266-9

Leonard and Levers Inc.

10/14/1932

Eddy

17S

29E

SE/4SE/4 from 5000’ to the base of the Wolfcamp formation

0170

1237

Non Producing

ST NM B-9563

Ed W. Owen

3/10/1942

Eddy

17S

29E

N/2NE/4, W/2W/2 below 5000’

0170

1238

Non Producing

ST NM B-10714-8

D. E. Wallace

10/11/1943

Eddy

17S

29E

NW/4NE/4, SW/4NW/4 below 5000’

0170

1239

Non Producing

ST MM B-10714-9

D. E. Wallace

10/11/1943

Eddy

17S

29E

NW/4SW/4 below 5000’

0170

1239

Non Producing

ST MM B-10714-9

D. E. Wallace

10/11/1943

Eddy

17S

29E

NE/4, NE/4NW/4, SW/4NW/4, W/2SE/4, SE/4SE/4 below 5000’

0170

1239

Non Producing

ST MM B-10714-9

D. E. Wallace

10/11/1943

Eddy

17S

29E

SW/4NW/4, NW/4SE/4 below 5000’

0170

1239

Non Producing

ST MM B-10714-9

D. E. Wallace

10/11/1943

Eddy

17S

29E

W/2SW/4 below 5000’

0170

1240

Non Producing

ST NM K-3790

Leonard Oil Company

12/17/1963

Eddy

17S

29E

SE/4NW/4 below 5000’

0170

1241

Non Producing

ST NM B-2023

Snowden and McSweeney

7/10/1933

Eddy

17S

29E

NE/4SW/4 from 5000’ to 10,912’

0338

1248

Non Producing

ST NM B-8318

Eddy

17S

27E

SE/4NW/4 2000’ to 5000’

0441

1269

Non Producing

FED NMNM-015068

Charles B Gonzales

8/1/1954

Eddy

18S

29E

SE/4NE/4, NE/4NE/4 surface to 3000’

ACCT #

LAND #

PROPERTY

LESSOR

LESSEE

DATE

COUNTY

STATE

SECTION

LANDS

1288

Non Producing

FED NMLC-029400-A

Julia M. Williams Paschall

8/1/1959

Lea

17S

32E

NW/4SW/4 base of San Andres formation to top of Wolfcamp formation

0398

1301

Non Producing

ST NM B-11593-3

Barnsdale Oil Company

11/10/1944

Eddy

17S

28E

Lot 2 and 4 from 650’ to 5000’

0375

1305

Non Producing

ST NM K-6647

R. G. McPheron

1/17/1967

Chaves

15S

29E

Lot 1 surface to 2001’

0482

1338

Non Producing

ST NM V-6698

Caza Energy LLC

10/1/2002

Eddy

16S

30E

S/2 to all depths

0484

1357

Non Producing

ST NM V-6747

Caza Energy LLC

12/1/2002

Eddy

16S

28E

Lots 1-2-3-6-7-10-11-14, NE/4SW/4, SW/4SW/4 to all depths

0485

1358

Non Producing

ST NM V-6748

Caza Energy LLC

12/1/2002

Eddy

16S

28E

NE/4NE/4, S/2NE/4, SE/4 to all depths

0486

1359

Non Producing

ST NM V-6760

Caza Energy LLC

12/1/2002

Eddy

16S

28E

E/2SE/4 to all depths

0881

1457

Non Producing

ST NM V-6940

Caza Energy LLC

11/1/2003

Eddy

18S

30E

NE/4, S/2SW/4, NW/4SE/4 to all depths

1131

1528

Non Producing

ST NM VB-608

Caza Energy LLC

12/1/2004

Eddy

16S

28E

SE/4SE/4 to all depths

1124

1542

Non Producing

FED NMNM-112913

Caza Energy LLC

1/1/2005

Eddy

19S

27E

Lots 1-2, S/2NE/4 to all depths

1125

1543

Non Producing

FED NMNM-112929

Caza Energy LLC

1/1/2005

Eddy

16S

31E

NE/4SW/4, SE/4SE/4 to all depths

1003

Non Producing

FED NMLC-029342-B

Texaco Expl & Prod Inc.

6/1/1991

Eddy

17S

30E

E/2SW/4, SE/4 below 4000’

0312

1275

Non Producing

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

S/2SE/4 to all depths

0312

1275

Non Producing

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

Lot 7, SE/4SW/4, S/2SE/4 to all depths

0312

1275

Non Producing

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

SW/4SW/4 Below 4627’

0312

1275

Non Producing

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

S/2NE/4, N/2NW/4 below 4600’

0312

1275

Non Producing

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

S/2NE/4 below base of Grayburg formation, NE/4NW/4 below 4600’

0312

1275

Non Producing

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

N/2NE/4, SE/4NE/4, SE/4NW/4 to all depths, SW/4NW/4 below the base of the Grayburg formation

0312

1275

Non Producing

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

NW/4, N/2SE/4 to all depths, W/2NE/4 below 3878’

0312

1275

Non Producing

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

S/2 to all depths

0312

1275

Non Producing

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

NE/4, N/2NW/4, NW/4SE/4 to all depths

0312

1275

Non Producing

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

S/2SE/4, NW/4SE/4, N/2NE/4SE/4, SW/4NE/4SE/4 below 11587’

0312

1275

Non Producing

ST NM B-2516

Shell Petroleum Corporation

2/10/1934

Lea

17S

33E

SE/4 4500’ to 10200’, SW/4 below 4500’

0043

1273

Non Producing

FED NM-14840

Phillips Petroleum

6/1/1992

Eddy

17S

29E

NE/4SE/4 surface to base of Wolfcamp formation

Mark Brewer


ACCT #	LAND #	PROPERTY	WI	NRI
0020	1007	Barbary 17 Com	0.00625000	0.00546875
0022	1275	Barracuda State	0.01000000	0.00875000
0078	1275	Chinook State	0.00750000	0.00656250
0093	1014	Coyote State	0.00250000	0.00208330
0116	1027	Elk 21 Federal	0.01000000	0.00875000
0118	1027	Elk 22 Federal	0.00625000	0.00546875
0767	1336	Fox Federal	0.00250000	0.00187500
0072	1220	Holder CB Federal	0.02000000	0.01650000
0073	1220	Holder CB Federal Paddock	0.02000000	0.01650000
0869	1424	Impala State	0.00250000	0.00187500
0221	1026	Kodiak Federal	0.00500000	0.00437500
0262	1330	McIntyre A East 2	0.00407407	0.00352000
0261	1330	McIntyre A East Paddock	0.00385000	0.00325920
0263	1331	McIntyre A West 8 Abo	0.00385000	0.00259880
0261	1331	McIntyre A West Paddock	0.00385000	0.00259880
1127	1526	New Mexico Z State	0.00250000	0.00206250
0301	1032	Oryx State	0.00250000	0.00208333
0766	1335	Panther Federal	0.00250000	0.00200780
0882	1139	Pearsall A	0.00250000	0.00187500
0320	1360	Randall Federal	0.02000000	0.01550000
0894	1469	Rhino Federal	0.00250000	0.00187500
0337	1245	Sapphire State	0.00250000	0.00218750
0405	1289	Tenneco State	0.01000000	0.00750000
0407	1292	Texaco BE	0.02000000	0.01750000
0265	1333	W D McIntyre C	0.01000000	0.00800000
		GBJK7RQNGBSA
0266	1333	W D McIntyre C Paddock	0.01000000	0.00800000
0269	1334	W D McIntyre E	0.01000000	0.00875000
0768	1337	Weasel Federal	0.00250000	0.00187500

Buckhorn


ACCT #	LAND #	PROPERTY	WI	NRI
0022	1275	Barracuda State	0.01000000	0.00875000
0078	1275	Chinook State	0.01000000	0.00875000
0093	1014	Coyote State	0.00250000	0.00208330
0099	1234	Diamondbacks State	0.01145700	0.01002490
0544	1068	Empire 20 State #1	0.01145700	0.01002490
0148	1202	Federal KL 17	0.01145700	0.00991030
0163	1202	Folk Federal	0.01145700	0.00991030
0767	1336	Fox Federal	0.00250000	0.00187500
0169	1232	GJ West Coop Unit	0.01145700	0.01002488
0169	1233	GJ West Coop Unit	0.01145700	0.01002488
0169	1233	GJ West Coop Unit	0.01145700	0.01002488
0169	1233	GJ West Coop Unit	0.01145700	0.01002488
0169	1234	GJ West Coop Unit	0.01145700	0.01002488
0169	1235	GJ West Coop Unit	0.01145700	0.01002488
0169	1236	GJ West Coop Unit	0.01145700	0.01002488
0169	1237	GJ West Coop Unit	0.01145700	0.01002488
0169	1238	GJ West Coop Unit	0.01145700	0.01002488
0169	1239	GJ West Coop Unit	0.01145700	0.01002488
0169	1239	GJ West Coop Unit	0.01145700	0.01002488
0169	1239	GJ West Coop Unit	0.01145700	0.01002488
0169	1239	GJ West Coop Unit	0.01145700	0.01002488
0169	1240	GJ West Coop Unit	0.01145700	0.01002488
0169	1241	GJ West Coop Unit	0.01145700	0.01002488
0171	1208	Gold Star Federal	0.00859275	0.00687420
0072	1220	Holder CB Federal	0.01000000	0.00825000
0072	1220	Holder CB Federal	0.01000000	0.00825000
0073	1220	Holder CB Federal Paddock	0.01000000	0.00825000
0073	1220	Holder CB Federal Paddock	0.01000000	0.00825000
0869	1424	Impala State	0.02500000	0.00187500
0221	1026	Kodiak Federal	0.01000000	0.00875000
0615	1202	Muskegon 17 State Com #1	0.01145700	0.00916541
0148	1239	Muskegon 17 State Com #1	0.01145700	0.00916541
0616	1236	Muskegon 20 State Com #1	0.00114570	0.00092008
0292	1041	Navaho Federal	0.01145700	0.00658770
1127	1526	New Mexico Z State	0.00250000	0.00206250
0170	1233	Non Producing	0.01145700	0.01002488
0170	1233	Non Producing	0.01145700	0.01002488
0170	1233	Non Producing	0.01145700	0.01002488
0170	1234	Non Producing	0.01145700	0.01002488
0170	1235	Non Producing	0.01145700	0.01002488
0170	1236	Non Producing	0.01145700	0.01002488
0170	1236	Non Producing	0.01145700	0.01002488
0170	1237	Non Producing	0.01145700	0.01002488
0170	1238	Non Producing	0.01145700	0.01002488
0170	1239	Non Producing	0.01145700	0.01002488
0170	1239	Non Producing	0.01145700	0.01002488
0170	1239	Non Producing	0.01145700	0.01002488
0170	1239	Non Producing	0.01145700	0.01002488
0170	1240	Non Producing	0.01145700	0.01002488
0170	1241	Non Producing	0.01145700	0.01002488
0043	1273	Non Producing	0.01145700	0.01002488
0301	1032	Oryx State	0.00250000	0.00208333
0766	1335	Panther Federal	0.00250000	0.00200780
0882	1139	Pearsall A	0.00250000	0.00187500
0320	1360	Randall Federal	0.01000000	0.00775000
0894	1469	Rhino Federal	0.00250000	0.00187500
0326	1236	Rincon State	0.01145700	0.00859270
0337	1245	Sapphire State	0.00250000	0.00218750
0389	1236	State I	0.01145700	0.01002488
0405	1289	Tenneco State	0.01145700	0.00859270
0768	1337	Weasel Federal	0.02500000	0.00187500
0432	1274	White Star Federal	0.00859275	0.00687420

Bill W. Chase


ACCT #	LAND #	PROPERTY	WI	NRI
0099	1234	Diamondbacks State	0.01145700 0	.01002490
0544	1068	Empire 20 State #1	0.01145700 0	.01002494
0148	1202	Federal KL 17	0.01145700 0	.00991031
0163	1202	Folk Federal	0.01145700 0	.00991030
0169	1232	GJ West Coop Unit	0.01145700 0	.01002488
0169	1233	GJ West Coop Unit	0.01145700 0	.01002488
0169	1233	GJ West Coop Unit	0.01145700 0	.01002488
0169	1233	GJ West Coop Unit	0.01145700 0	.01002488
0169	1234	GJ West Coop Unit	0.01145700 0	.01002488
0169	1235	GJ West Coop Unit	0.01145700 0	.01002488
0169	1236	GJ West Coop Unit	0.01145700 0	.01002488
0169	1237	GJ West Coop Unit	0.01145700 0	.01002488
0169	1238	GJ West Coop Unit	0.01145700 0	.01002488
0169	1239	GJ West Coop Unit	0.01145700 0	.01002488
0169	1239	GJ West Coop Unit	0.01145700 0	.01002488
0169	1239	GJ West Coop Unit	0.01145700 0	.01002488
0169	1239	GJ West Coop Unit	0.01145700 0	.01002488
0169	1240	GJ West Coop Unit	0.01145700 0	.01002488
0169	1241	GJ West Coop Unit	0.01145700 0	.01002488
0171	1208	Gold Star Federal	0.00859275 0	.00687420
0072	1220	Holder CB Federal	0.01000000 0	.00825000
0072	1220	Holder CB Federal	0.01000000 0	.00825000
0073	1220	Holder CB Federal Paddock	0.01000000 0	.00825000
0073	1220	Holder CB Federal Paddock	0.01000000 0	.00825000
0615	1202	Muskegon 17 State Com #1	0.01145700 0	.00916541
0148	1239	Muskegon 17 State Com #1	0.01145700 0	.00916541
0616	1236	Muskegon 20 State Com #1	0.00114570 0	.00092008
0292	1041	Navaho Federal	0.01145700 0	.00658780
0170	1233	Non Producing	0.01145700 0	.01002488
0170	1233	Non Producing	0.01145700 0	.01002488
0170	1233	Non Producing	0.01145700 0	.01002488
0170	1234	Non Producing	0.01145700 0	.01002488
0170	1235	Non Producing	0.01145700 0	.01002488
0170	1236	Non Producing	0.01145700 0	.01002488
0170	1236	Non Producing	0.01145700 0	.01002488
0170	1237	Non Producing	0.01145700 0	.01002488
0170	1238	Non Producing	0.01145700 0	.01002488
0170	1239	Non Producing	0.01145700 0	.01002488
0170	1239	Non Producing	0.01145700 0	.01002488
0170	1239	Non Producing	0.01145700 0	.01002488
0170	1239	Non Producing	0.01145700 0	.01002488
0170	1240	Non Producing	0.01145700 0	.01002488
0170	1241	Non Producing	0.01145700 0	.01002488
0043	1273	Non Producing	0.01145700 0	.01002488
0320	1360	Randall Federal	0.01000000 0	.00775000
0326	1236	Rincon State	0.01145700 0	.00859280
0389	1236	State I	0.01145700 0	.01002488
0405	1289	Tenneco State	0.01145700 0	.00859275
0432	1274	White Star Federal	0.00859275 0	.00800000

COG Areas of Mutual Interest/CA’s

County

State

Prospect

Date

Term

Acres Covered

COG WI

Participants

Remarks

Eddy

Sandy

9/1/2005

2 yrs.

- 2,760 acres

40%

Bold Energy, LP

Lea

Bar U

9/1/2005

2 yrs.

- 5,760 acres

50%

Bold Energy, LP

Chaves

Cigar

9/1/2005

Through Lease Expiration

5 Townships + 1 mile halo

38%

BC Operating, et al

AMI doesn’t apply in certain circumstances including acquisition

of substantially all or a package of assets of an entity.

Lea

Pawnee North

7/15/2005

3 years thereafter extended by

-12,800 acres

50%

Bold Energy, LP

excludes merger, consolidation or other corporate transaction

mutual consent

resulting in a party acquiring any entity, or the purchase of all

or substantially all of the assets of any entity.

Lea

Pawnee

7/15/2005

Same as above

- 24,640 acres

50%

Bold Energy, LP

same as above — Seismic Agreement limits transferability

Lea

Pawnee

12/1/2005

Proprietary Data Licensing Agreement

Devon 3D Rattlesnake Shoot

Devon, Chesapeake, Bold

one time change of control

Eddy

Aladdin

11/1/2005

3 yrs.

- 8,060 acres

38% BPO

Capstone Oil & Gas Co., LP, et al

AMI doesn’t apply in certain circumstances including acquisition

30.4% APO

of substantially all or a package of assets of an entity.

Lea

Bilbrey South

Perpetual as long as O/A active

Sec 9 & 10 T22S-R32E

25%

Dominion, French, Vision, et al

L. R. French JV Agreement — if acreage or interest acquired must

offer 50% to French

Andrews

Florey South

11/8/1982

As long as leases are in effect

2560 acres covering portions of Secs. 7,8,17,18,19,20 in

42%

Tom E. Johnson et al

Blk. A36 & portions of Secs. 15, 16&25 in Blk. A35, all

in PSL Survey

Colorado

Babb

9/29/1994

So long as leases are in effect

2880 acres covering portions of GH&H RR Survey

10%

Jamex, Inc.

Ector

NW Penwell

12/12/1987

Life of leases

- 2,560 acres

varies - approx 50%

Osborn Heirs et al

Gaines

Stonehenge

12/1/1993

Term of JOA

- 14,500 acres covering portions of Blks A8, A9, A11 and

50%

L. R. French, Jr.

Interest may vary subject to third party agreements

AX, PSL Survey and Blk. G, CCSD&RGNG Survey

Disclosure Statement
Exhibit 3.1(l)

Page 1 of 3

County

State

Prospect

Date

Term

Acres Covered

COG WI

Participants

Remarks

Gaines

Tex-Mex

5/20/1980

Term of JOA

5330 acres covering Secs. 1,2,9,10,11,12 & E/2 8, Blk. A-28 & Secs. 1 & 2, Blk. A-30, all in PSL Survey

Varies (5% - 12%)

Forest

Subject to 5/20/80 Letter Agreement (unable to locate in file)

Hardin

Club de Campo

2/28/2003

As long as leases are in effect

- 2300 acres

Hardin

Clerva Grande

2/15/2004

As long as leases are in effect

- 1280 acres

10%

United Resources et al

Jackson

Robinson Lake

10/20/2003

Term of JOA (so long as leases are in effect)

400 acres in James Kerr Survey

16.40625%

Brayton Operating Corp

Kent

South Creek South

9/4/2001

7/1/2006

- 12,160 acres being 19 sections in Block G,

27.54000%

Barrett Brothers et al

W&NW Survey

Loving

Stagecoach

2/11/1994

Term of JOA (90 days from cessation of production)

- 2400 acres covering portions of W&NW Blk 2

52.50000%

John H. Hendrix Corp. et al

Loving

Two Freds

12/9/1994

So long as there is production in paying

2560 acres in portions of Block 19, ULS

25.00000%

Western Reserves

quantities under JOA

Lubbock

Atlantis

2/14/2004

exp 1/1/2009

-51000 acres

20.00000%

JDW, Inc. et al

Martin

Big Starr

2/15/1988

6 months after expiration of leases subject to JOA

2880 acres covering portions of Blks 38 & 39,

6.66700%

RK Petroleum

T1N, TUP Survey

Victoria

Lone Tree Cree

4/1/2003

As long as leases are in effect

-320 acres + 1000, halo

25%

Corum Production Co. et al

Victoria

Inez

8/27/2003

Term of JOA (so long as leases are in effect)

- 138 acres in Inez Township

18.75%

Brayton Operating Corp

Webb

Davis Field

4/14/1989

One year from date of expiration of leases

- 820 acres in Alberca de Arriba Grant Survey

13.125%

Kebo Oil & Gas

subject to JOA

Wharton

Stovall

5/8/2003

Term of JOA (so long as leases are in effect)

145.13 acres in Cummings Survey et al

10.995%

Brayton Operating Corp

Wheeler

Britt Ranch

1/5/1988

As long as leases are in effect

640 acres being Sec. 5, Blk. 5, B&B Survey

10.000%

Gifford Operating et al

Zapata

Singer/Volpe

6/15/2004

2yrs.

- 1,340 acres

43.750%

Denall O&G et al

Farmed out our interest

to Les Texas

Disclosure Statement
Exhibit 3.1(l)

Page 2 of 3

County

State

Prospect

Date

Term

Acres Covered

COG WI

Participants

Remarks

Schlelcher

Geneva

eff 3/15/2005

3 years

- 8,640 acres

47% BPO; 35.25% APO

Alplna Gas Company LLC, Activa Resources LLC,

Magnum Producing & Operating Company, Insight

Production Company, Maxmin Resources, LLC, PAR

Minerals Corp and Lone Star Production Company

Reeves

Toyah Platform

eff 2/2/06

2 years

- 8,320 acres

85%

Great Texas Crude Inc.

Does not apply to acquisition in AMI that is part of a

larger acquisition outside the AMI, nor to merger,

consolidation, reorganization or the purchase of all or

substantially all of the assets of another company, nor to

acquisitions from any corporation in which a party owns a

majority of the stock, nor to any acquisition by 1 party

from another party to the agreement.

Edwards and Kinney

Triple Crown

2/12/2006

2 years

100,000 acres

Lone Star Production Company

Confidentiality Agreement with non-compete to evaluate

prospect; no AMI.

White/Woodruff

Fayetteville

6/27/2005

18 months

12 township/ranges

0% CA

Anvil Energy

CA, lost deal to Chesapeake

Faulkner/White

Fayetteville

9/29/2005

3 yrs

21 township/ranges

66.67%

Sam Gary Jr.

AMI language contained in a lease acquisition

letter agreement

Mountrall

Manitou

7/22/2005

3 yrs

pt of 5 township/ranges

31.25%

Sam Gary Jr., etal

AMI doesn’t apply if one party buys out another subject

to agreement

McKenzie

Westburg

1/16/2006

3 yrs

8 township/ranges

44.83%

Sam Gary Jr.

AMI doesn’t apply if one party buys out another subject

to agreement

Culberson/Reeve

Barnett

6/1/2005

5 yrs

800M ac east central Culberson

91%

EnCana etal

AMI doesn’t apply if one party buys out another subject

to agreement

Culberson

Barnett

10/1/2005

3 yrs

blk A-C per stip agreement

25-75%

EnCana

AMI doesn’t apply if one party buys out another subject

to agreement

Big Horn & Park

Cowboy

12/21/2005

18 months

Twp 50-55; Rge 93-99

Robery Bayless, Maralo

CA-decision to participate has been delayed

Disclosure Statement
Exhibit 3.1(l)

Page 3 of 3

OPERATOR

LEASE

WELL

WELL NAME

COUNTY ST

OF WELL

MONTH

(UNDER)

STATUS

Apache

301109

001

State WEL

Lea, NM

Prod

Nov-05

(25

)

Selling over

BP America

421119

001

J.O. Neal #1U

Illegible, TX

Sep-05

4,776

BP America

421119

001

J.O. Neal #1L

Illegible, TX

Prod

Sep-05

(1,041

)

Selling entitlement

Burlington

301140

027

Johnston Fed #27-FC

San Juan, NM

Prod

Nov-05

(377

)

Selling entitlement

Burlington

301140

024

Johnston Fed #24-FC

San Juan, NM

Prod

Nov-05

526

Selling entitlement

Burlington

301140

026

Johnston Fed #26-FC

San Juan, NM

Prod

Nov-05

(746

)

Selling over this month to balance

Burlington

301140

023

Johnston Fed #23-FC

San Juan, NM

Prod

Nov-05

922

Selling entitlement

Burlington

301140

029

Johnston Fed #29-FC

San Juan, NM

Prod

Nov-05

1,757

Selling under

Burlington

301140

015

Johnston Fed #15R-FC

San Juan, NM

Prod

Nov-05

(1,105

)

Selling over

Burlington

301140

022

Johnston Fed #22R-FC

San Juan, NM

Prod

Nov-05

2,815

Selling over

Burlington

301140

028

Johnston Fed #28R-FC

San Juan, NM

Prod

Nov-05

13,994

Selling over

Burlington

301140

023

Johnston Fed #23S-FC

San Juan, NM

Prod

Nov-05

5,411

Selling entitlement-new well-

Burlington

301140

155

Johnston Fed #15S-FC

San Juan, NM

Prod

Oct-05

(1,010

)

Burlington

301140

295

Johnston Fed #29S-FC

San Juan, NM

Prod

Nov-05

(927

)

Burlington

301140

265

Johnston Fed #26S-FC

San Juan, NM

Prod

Nov-05

(857

)

COG

301011

001

Moots Fee #1

Chaves, NM

Prod

Jun-05

Illegible/Philips

301050

001

NW Crosb Unit

Lea, NM

Prod

Nov-05

(40,773

)

Selling over

Chevron/Texaco

301103

001

West Dollarhide Dimkard

Lea, NM

Prod

Jun-04

(1,686

)

Selling entitlement

IllegibleDevon

301064

001

Parkway West #2-29

Eddy, NM

Prod

Oct-05

(223

)

Selling over

IllegibleDevon

301064

007

Parkway West #7-22

Eddy, NM

Prod

Oct-05

(4,304

)

Selling over

IllegibleDevon

301064

001

Parkway West #3 (Morrow)

Eddy, NM

Prod

Oct-05

(2,546

)

Selling under

IllegibleDevon

301064

001

Parkway West #5

Eddy, NM

Prod

Oct-05

(687

)

Selling over

IllegibleDevon

301064

001

Parkway West #5

Eddy, NM

Prod

Illegible

IllegibleDevon

301064

001

Parkway West #5

Eddy, NM

Prod

Illegible

IllegibleDevon

301064

001

Parkway West #8

Eddy, NM

Prod

Oct-05

907

Selling entitlement

IllegibleDevon

301064

001

Parkway West #9 (Morrow)

Eddy, NM

Prod

Oct-05

(28

)

Selling entitlement

IllegibleDevon

301064

001

Parkway West #10 (Morrow)

Eddy, NM

Prod

Checking into-see attached

IllegibleDevon

301064

001

Parkway West #12

Eddy, NM

Prod

Aug-03

—

Selling Entitlement no statement

IllegibleDevon

301064

002

Parkway West #28-2

Eddy, NM

Prod

Oct-05

6,828

Selling over

IllegibleDevon

421112

001

Rodgers

Ward, TX

Prod

Aug-03

(50,587

)

Selling over

Exxon

421123

001

Illegible GU #8-1

Illegible, TX

Prod

Jun-04

—

Selling entitlement

Exxon

421130

001

Stroman GU #1

Illegible, TX

Prod

Jun-04

—

Selling entitlement

IllegibleFasken

301062

002

Avakon 1 Fed #2

Eddy, NM

Prod

Oct-05

—

Balanced Final Statement

IllegibleFasken

301062

004

Avakon 1 Fed #4

Eddy, NM

Prod

Apr-05

—

Balanced Final Statement

Fasken

301060

02M

EI Paso Federal #2(Morrow)

Eddy, NM

Prod

Oct-05

(1,131

)

Selling entitlement

Fasken

301060

02P

EI Paso Fed #2(Up Pem)

Eddy, NM

Prod

Oct-05

(47

)

Selling entitlement

Fasken

301060

001

EI Paso 3-1 (Strawn)

Eddy, NM

P&A

Mar-05

—

P&A

Fasken

301060

001

EI Paso 3-1 (Atoka)

Eddy, NM

P&A

Mar-05

—

P&A

Fasken

301060

001

EI Paso 3-1 (Morrow)

Eddy, NM

P&A

Mar-05

—

P&A

Fasken

301060

001

EI Paso 3-1 (Wolfcamp)

Eddy, NM

Mar-05

—

Dry-TA

Fasken

301060

003

EI Paso Fed #3

Eddy, NM

Prod

Apr-05

—

Balanced Final Statement

Fasken

301060

004

EI Paso Fed #4

Eddy, NM

Prod

Oct-05

—

Selling entitlement

Fasken

301060

005

EI Paso Fed #5

Eddy, NM

Prod

Oct-05

673

Selling entitlement

Fasken

301060

006

EI Paso Fed #6

Eddy, NM

Prod

Oct-05

57,848

Selling entitlement

Fasken

301060

006

EI Paso Fed #6 CA

Eddy, NM

P&A

Sep-99

(29

)

P&A

Fasken

301060

007

EI Paso Fed #7

Eddy, NM

Prod

Aug-05

—

Balanced Final Statement

Fasken

301059

001

Gulf Federal #1

Eddy, NM

Prod

Jul-04

8,684

Selling entitlement

Fasken

301063

001

Lake Federal #1(Morrow)

Eddy, NM

P&A

Dec-92

127

P&A

Fasken

301063

001

Lake Federal #1 (Upper)

Eddy, NM

Jul-04

—

Fasken

301058

001

Maralo Federal #1

Eddy, NM

Prod

Apr-05

—

Selling entitlement

Fasken

301058

002

Maralo Federal #2

Eddy, NM

Prod

Oct-05

11,535

Selling entitlement

Forest Oil Permian

421088

001

University #141

Winker, TX

TA 10/96

May-96

(74

)

Forest Oil Permian

421088

002

University #142U

Winker, TX

Prod

Nov-04

141

Selling entitlement

Forest Oil Permian

421089

001

University BLK 22 GU #151

Winker, TX

Prod

Nov-04

1,642

Selling entitlement

Forest Oil Permian

421086

001

University BLK 21 GU #261 WLFCMP

Nov-04

Forest Oil Permian

401086

002

University BLK 21 #262 U

Nov-04

)

Forest Oil Permian

421086

004

University BLK 21 #264

Nov-04

)

Gruy(Cimarex)

301068

001

Parkway St Com #1

Eddy, NM

Prod

—

Balanced Final Statement.

Gruy(Cimarex)

301068

001

Parkway “A” St Com #1

Eddy, NM

Prod

Nov-05

(6,735

)

Selling over

Gruy(Cimarex)

301066

001

State 16A Com #1

Eddy, NM

Prod

Nov-05

(5,218

)

Selling over

Marathon

421091

001

McClendon #1-4

Illegible TX

Prod

Jun-04

(5,433

)

Selling over

Illegible

301092

001

Jurnegan St Com #1

Eddy, NM

Prod

Dec-05

122

Selling over

Illegible

301049

002

Nash #2

Eddy, NM

Prod

Sep-05

—

Selling entitlement

OXY

301100

001

State CV

Eddy, NM

Jul-03

3,401

IllegibleRubicon

301090

001

State IC

Eddy, NM

SI 2/03

Mar-04

3,188

IllegibleRubicon

301089

001

State IH

Eddy, NM

Prod

Dec-00

(412

)

Selling entitlement

IllegibleRubicon

301094

001

State IN

Eddy, NM

Prod

Aug-03

8,898

Selling entitlement

IllegibleRubicon

301091

001

State IX

Eddy, NM

Oct-94

2,369

SI 10/95

Yates

301054

001

Barbee LL #1

Lea, NM

Prod

Sep-05

1,538

Selling entitlement

Yates

301098

002

Millman HD St #2

Eddy, NM

Prod

Sep-05

(156

)

Selling entitlement

7,101

Johnston Fed Pipeline Imbalance

15,859


Illegible		Rubicon sold to Illegible effective 04/27/05

Illegible		Illegible

Illegible		Devon is reducing our gas sales to zero to minimize the associated liability when the wall ceases to produce Illegible 03/08/05

Illegible		Faskin is selling enough of our gas to cover our JIB expenses The remainder will go to offset our overproduced position as we do not have reserves to cover it. See letter in file dated 4/19/05.

Concho Equity Holdings Corp.
Tickler List Items:

Next Due

Due Date

Date

Comments

2. O&G Commodity Derivatives:

b. Crude Oil

)

Internal Reference:

06-01

3/7/2006

4/7/2006

Floating price is Commodity Business Day

Counterparty:

BNP Paribas

monthly average of closing NYMEX price.

Counterparty Deal #:

Put: 75249

Settlement due 5th business day following

Call: 75249

month end.

Trade Date:

12/17/04

Start Date:

1/1/06

Maturity Date:

12/31/06

Index:

NYMEX Crude Oil

Volume:

700 bbls per day

Settlement:

Monthly

Ceiling Price:

$42.65/bbl.

Floor Price:

$39.25/bbl.

)

Internal Reference:

07-01

2/7/2007

3/7/2007

Floating price is Commodity Business Day

Counterparty:

Bank of America

monthly average of closing NYMEX price.

Counterparty Deal #:

Put: 409Z37

Settlement due 5th business day following

Call: 409238

month end.

Trade Date:

12/17/04

Start Date:

1/1/07

Maturity Date:

12/31/07

Index:

NYMEX Crude Oil

Volume:

650 bbls per day

Settlement:

Monthly

Ceiling Price:

$41.75/bb1.

Floor Price:

$37.95/bbl.

c. Natural Gas

)

Internal Reference:

06-02

3/8/2006

4/10/2006

Floating price is first of the

Counterparty:

BNP Paribas

month Inside FERC Gas Market

Counterparty Deal #:

Put: 74780

Report. Settlement due 5th business

Call: 74780

day after the publishing of the

Trade Date:

12/8/04.

Inside FERC Report.

Start Date:

1/1/06

Maturity Date:

12/31/06

Index:

Inside FERC — EPNG Permian Basin

Volume:

4,000 MMBtu/day

Settlement:

Monthly

Ceiling Price:

$6.45/MMBtu

Floor Price:

$5.28/MMBtu

)

Internal Reference:

07-02

1/8/2007

2/8/2007

Floating prise is first of the month

Counterparty:

Bank of America

Inside FERC Gas Market Report. Settlement

Counterparty Deal #:

Put: 408236

due 5th business day after the publishing

Call: 408237

of the Inside FERC Report.

Trade Date:

12/08/04

Start Date:

1/1/07

Maturity Date:

12/31/07

Index:

Inside FERC — EPNG Permian Basin

Volume:

3,500 MMBtu/day

Settlement:

Monthly

Ceiling Price:

$6.02/MMBtu

Floor Price:

$5.00/MMBtu


2/24/2006		Disclosure Statement Exhibit 3.1 (t)

Concho Equity Holdings Corp.
Tickler List Items:

Next Due

Due Date

Date

Comments

2. O&G Commodity Derivatives:

b. Crude Oil

)

Internal Reference:

06-01

3/7/2006

4/7/2006

Floating price is Commodity Business Day

Counterparty:

BNP Paribas

monthly average of closing NYMEX price.

Counterparty Deal #:

Put: 75249

Settlement due 5th business day following

Call: 75249

month end.

Trade Date:

12/17/04

Start Date:

1/1/06

Maturity Date:

12/31/06

Index:

NYMEX Crude Oil

Volume:

700 bbls per day

Settlement:

Monthly

Ceiling Price:

$42.65/bbl.

Floor Price:

$39.25/bbl.

)

Internal Reference:

07-01

2/7/2007

3/7/2007

Floating price is Commodity Business Day

Counterparty:

Bank of America

monthly average of closing NYMEX price.

Counterparty Deal #:

Put: 409237

Settlement due 5th business day following

Call: 409238

month end.

Trade Date:

12/17/04

Start Date:

1/1/07

Maturity Date:

12/31/07

Index:

NYMEX Crude Oil

Volume:

650 bbls per day

Settlement:

Monthly

Ceiling Price:

$41.75/bbl.

Floor Price:

$37.95/bbl.

c. Natural Gas

)

Internal Reference:

06-02

3/8/2006

4/10/2006

Floating price is first of the month

Counterparty:

BNP Paribas

Inside FERC Gas Market Report.

Counterparty Deal #:

Put: 74780
Call: 74780

Settlement due 5th business day after the publishing of the Inside

Trade Date:

12/8/04

FERC Report.

Start Date:

1/1/06

Maturity Date:

12/31/06

Index:

Inside FERC — EPNG Permian Basin

Volume:

4,000 MMBtu/day

Settlement:

Monthly

Ceiling Price:

$6.45/MMBtu

Floor Price:

$5.28/MMBtu

)

Internal Reference:

07-02

1/8/2007

2/8/2007

Floating price is first of the month

Counterparty:

Bank of America

Inside FERC Gas Market Report.

Counterparty Deal #:

Put: 408236

Settlement due 5th business day

Call: 408237

after the publishing of the Inside

Trade Date:

12/8/04

FERC Report

Start Date:

1/1/07

Maturity Date:

12/31/07

Index:

Inside FERC — EPNG Permian Basin

Volume:

3,500 MMBtu/day

Settlement:

Monthly

Ceiling Price:

$6.02/MMBtu

Floor Price:

$5.00/MMBtu


2/21/2006	Page 1 of 2

Exhibit 5.6 (a)

STOCKHOLDERS’ AGREEMENT

This STOCKHOLDERS’ AGREEMENT (this “Agreement”), made and entered into as of February 27, 2006, by and among Concho Resources Inc., a Delaware corporation (the “Company”), the Persons listed on Schedule I attached hereto (the “Holdings Owners”), Chase Oil Corporation, a New Mexico corporation (“Chase”), Caza Energy LLC, a New Mexico limited liability company (“Caza”) and the Persons listed on Schedule II attached hereto (collectively, the “WI Owners”) (Chase, Caza and the WI Owners are sometimes collectively referred to herein as the “Chase Owners,” and the Holdings Owners and the Chase Owners are sometimes collectively referred to herein as the “Owners” and individually as an “Owner”).

W I T N E S S E T H:

Section 1. Background.

(a) The Company has agreed to issue to the Holdings Owners and the Chase Owners certain shares of the Company’s common stock, par value $0.001 per share (the “Common Stock”), pursuant to the transactions contemplated by that certain Combination Agreement dated as of February 24, 2006 by and among the Company, the Holdings Owners and the Chase Owners (the “Combination Agreement”).

(b) As a condition precedent to the execution and delivery of the Combination Agreement, the parties hereto have agreed to execute and deliver this Agreement.

Section 2. Definitions. As used in this Agreement, the following terms shall have the meanings assigned to them in this Section 2:

“Accredited Investor” has the meaning ascribed to it in Regulation D, Rule 501(a), promulgated by the Securities and Exchange Commission.

“Affiliate” means, when used with respect to a specified Person, any other Person which, directly or indirectly, owns or controls, is under common ownership or control with, or is owned or controlled by, such Person, and any directors, officers, partners or 5% or more owners of such Person.

“Board” means the Board of Directors of the Company.

“Drag-Along Transaction” means any of the following transactions: (i) the sale of all or substantially all of the assets of the Company on a consolidated basis to an unrelated Person, (ii) a merger, reorganization or consolidation in which the holders of the Company’s outstanding voting power immediately prior to such transaction do not own a majority of the outstanding voting power of the surviving or resulting entity immediately upon completion of such transaction, or (iii) any other transaction in which the owners of the Company’s outstanding voting power prior to such transaction do not own at least a majority of the outstanding voting power of the successor entity immediately upon completion of the transaction.

“Excluded Affiliate Transfer” means any Transfer of Owner Shares by an Owner (whether voluntarily or by operation of law) to a stockholder, partner or other Affiliate of the Owner; any Transfer of Owner Shares by an Owner who is an individual to a trust or family limited partnership for estate planning purposes if such Owner retains the right to vote such Owner Shares following such transfer; and any Transfer of Owner Shares by a Chase Owner to an employee of a Chase Owner or an Affiliate thereof; provided that, such transferee agrees to be bound by the terms of this Agreement and evidences same by executing a copy of this Agreement promptly upon receiving the assignment of such Owner Shares.

“Holdings” means Concho Equity Holdings Corp., a Delaware corporation.

“New Securities” shall mean the Common Stock or preferred stock of the Company, whether now authorized or not, and rights, options or warrants to purchase such Common Stock or preferred stock, and securities of any type whatsoever that are, or may become, convertible or exchangeable into such Common Stock or preferred stock; provided, however, that the term “New Securities” does not include:

(i) shares of Common Stock, or options, warrants or rights therefor granted or issued on the date hereof or at any time hereafter to employees, officers, directors, contractors, consultants or advisers to, the Company or any subsidiary pursuant to incentive agreements, stock purchase or stock option plans, stock bonuses or awards, warrants, contracts or other arrangements that are approved by the Board;

(ii) shares of Common Stock or preferred stock of the Company (and/or options or warrants therefor) issued or issuable to parties providing the Company with equipment leases, real property leases, loans, credit lines, guaranties of indebtedness, cash price reductions or similar financing, under arrangements approved by the Board;

(iii) shares of Common Stock or preferred stock of the Company issued pursuant to the Company’s acquisition of another corporation or entity by consolidation, merger, purchase of all or substantially all of the assets, or other reorganization in which the Company acquires, in a single transaction or series of related transactions, all or substantially all of the assets of such other corporation or entity or 50% or more of the voting power of such other corporation or entity or 50% or more of the equity ownership of such other entity;

(iv) shares of Common Stock issued pursuant to the transactions contemplated by the Combination Agreement;

(v) shares of the Common Stock or preferred stock of the Company issued in connection with any stock split or stock dividend; and

(vi) securities offered by the Company to the public pursuant to a registration statement filed under the Securities Act.

“Owner Majority” means the Owners holding at least 80% of the issued and outstanding Common Stock.

“Owner Shares” means with respect to any Owner (i) all shares of Common Stock held by such Owner, (ii) any equity securities issued or issuable directly or indirectly to an Owner with respect to the Common Stock referred to in clause (i) above by way of stock dividend or stock split or in connection with a combination of shares, conversion, recapitalization, merger, consolidation or other reorganization and (iii) any other shares of any class or series of voting securities of the Company currently held or held in the future by an Owner. As to any particular shares constituting Owner Shares, such shares will cease to be Owner Shares when they have been transferred to any person who is not a party hereto, other than pursuant to an Excluded Affiliate Transfer.

“Person” means an individual, partnership, limited partnership, limited liability company, foreign limited liability company, trust, estate, corporation, custodian, trustee, executor, administrator, nominee or entity in a representative capacity.

“Pledge” means any pledge of an interest in, or other encumbrance placed upon, Owner Shares as security for indebtedness or for other purposes, other than:

(i) a pledge granted by such Owner in favor of the Company or any of its controlled subsidiaries; and

(ii) a pledge granted by a Person and in favor of third party banks in connection with the refinance of promissory notes payable by such Person to Holdings (and outstanding as of the date hereof) in order to comply with the requirements of the Sarbanes-Oxley Act of 2002.

“Pro Rata Share” for purposes of Section 5 is the ratio of (i) the number of shares of Common Stock as to which such Owner is the beneficial owner, to (ii) the total number of shares of Common Stock of the Company outstanding (based on fully-diluted Common Stock ownership, excluding unvested incentive awards).

“Proportionate Share” means for purposes of Section 3, the number of Owner Shares equal to the product of (i) the total number of Disposition Shares which a Proposed Purchaser has offered to purchase, times (ii) the fraction which is equal to the total number of Owner Shares which a Tag-Along Owner, a Chase Owner or a Holdings Owner, as applicable, owns, over the aggregate number of Owner Shares owned by all Tag-Along Owners, Chase Owners and/or Holdings Owners, as applicable, and the Selling Owner.

“Proposed Purchaser” means the person or group that proposes to acquire the Disposition Shares.

“Securities Act” means the Securities Act of 1933, as amended.

“Transfer” means any sale, assignment or other disposition of Owner Shares, other than a Pledge.

Section 3. Transfer Provisions.

(a) General Rights. In addition to any restrictions on the Transfer of Owner Shares that are imposed under applicable securities laws, no Owner shall Transfer or Pledge all or any part of his Owner Shares except in accordance with this Section 3.

(b) Lock-up. Without the prior written consent of the Company (which consent may be withheld or delayed in the Company’s sole discretion), no Owner shall, during the period commencing on the date of this Agreement and ending on the earlier to occur of (i) the date on which the Company completes the initial sale of its shares of Common Stock to the public pursuant to a registration statement filed under the Securities Act or (ii) 270 days after the date of this Agreement, Transfer or Pledge any Owner Shares or enter into any swap or other arrangement that transfers to another, in whole or in part, directly or indirectly, any of the economic consequences of ownership of any Owner Shares.

(c) Rights of Refusal and Tag-Along Right. No Owner shall have the right to effect any Transfer of his Owner Shares (other than as provided in subsection (e) of this Section 3) unless the Owner proposing to Transfer such Owner Shares (the “Selling Owner”) provides written notice to the other Owners (a “Transfer Notice”) of such desire, identifying the number of such Selling Owner’s Owner Shares that the Selling Owner proposes to Transfer (the “Disposition Shares”), and such Selling Owner complies with the Rights of Refusal of clause (i) and the Tag-Along requirements of clause (ii) below.

(i) Rights of Refusal.

(A) The Company shall have a right of first refusal (the “Company’s Right of First Refusal”) to purchase all of the Disposition Shares, if the Company gives written notice of the exercise of such right to the Selling Owner within 20 days (the “Company’s Refusal Period”) from the receipt of the Transfer Notice. If the Company does not intend to exercise the Company’s Right of First Refusal in full or if the Company is not lawfully able to repurchase all of the Disposition Shares, the Company will send written notice thereof (the “Company’s Expiration Notice”) to the Selling Owner and to each other Owner at least 10 days before the expiration of the Company’s Refusal Period.

(B) If the Company does not purchase the Disposition Shares pursuant to the Company’s Right of First Refusal, the Chase Owners, in the event that the Selling Owner is a Chase Owner, or the Holdings Owners, in the event that the Selling Owner is a Holdings Owner, shall have a right of second refusal (the “Owners’ Right of Second Refusal”) to purchase the Disposition Shares by giving written notice of the exercise of such right to the Selling Owner and the Company within 20 days (the “Owners’ Refusal Period”) from receipt of the Company’s Expiration Notice. Each Chase Owner or Holdings Owner, as applicable, shall have the right to purchase such Owner’s Proportionate Share of the Disposition Shares with respect to the other Chase Owners or Holdings Owner, as applicable. If any Chase Owner or Holdings Owner, as applicable, elects not to purchase his Proportionate Share of the Disposition Shares, the other Chase Owners or Holdings Owners, as applicable, may purchase the Disposition Shares until no Owner desires to purchase any remaining Disposition Shares. If the Chase Owners or the Holdings Owners, as applicable, do not intend to exercise the Owners’ Right of Second Refusal in full then such Chase

Owners or Holdings Owners, as applicable, shall send written notice thereof (the “Owners’ Expiration Notice”) to the Selling Owner and to the Company at least 10 days before the expiration of the Owners’ Refusal Period. At the expiration of the Owners’ Refusal Period, the Company shall give prompt notice to the Chase Owners, in the event that the Selling Owner is a Holdings Owner, or the Holdings Owners, in the event that the Selling Owner is a Chase Owner, of the Owners’ Expiration Notice.

(C) If the Chase Owners or the Holdings Owners, respectively, do not purchase the Disposition Shares pursuant to the Owners’ Right of Second Refusal, the Chase Owners, in the event that the Selling Owner is a Holdings Owner, or the Holdings Owners, in the event that the Selling Owner is a Chase Owner, shall have a right of third refusal (the “Owners’ Right of Third Refusal”) to purchase the Disposition Shares by giving written notice of the exercise of such right to the Selling Owner and the Company within 20 days from receipt of the Owners’ Expiration Notice. Each Chase Owner or Holdings Owner, respectively, shall have the right to purchase such Owner’s Proportionate Share of the Disposition Shares with respect to the other Chase Owners or Holdings Owners, as applicable. If any Chase Owner or Holdings Owners, respectively, elects not to purchase his Proportionate Share of the Disposition Shares, the other Chase Owners or Holdings Owners, respectively, may purchase the Disposition Shares until no Owner desires to purchase any remaining Disposition Shares.

(D) The purchase price for the Disposition Shares to be purchased by the Company upon exercise of the Company’s Right of First Refusal or the Chase Owners or the Holdings Owners, respectively, upon the exercise of the Owners’ Right of Second Refusal or the Owners’ Right of Third Refusal will be the bona fide cash price (or the fair market value of any non-cash consideration as determined in good faith by the Board) per share offered by, and for which the Selling Owner proposes to transfer such Disposition Shares, to the Proposed Purchaser(s) (the “Offered Price”) (subject to any rights the Company may have under any other agreement to purchase all or some of such offered stock at a lower price), and will be payable within 30 days after the date of the Owners’ Expiration Notice. Payment of the purchase price will be made, at the option of the Company and/or the purchasing Chase Owners or Holdings Owners, respectively, as applicable, (a) in cash (by cashier’s check), (b) by wire transfer of immediately available funds to the Selling Owner, or (c) by any combination of the foregoing.

(ii) Tag-Along Rights. If the Company does not exercise the Company’s Right of First Refusal and the Chase Owners or the Holdings Owner, as applicable, do not exercise the Owners’ Right of Second Refusal and the Owners’ Right of Third Refusal in full, the Selling Owner shall cause the Proposed Purchaser(s) to offer in writing (the “Purchase Offer”) to the other Owners, other than any Chase Owners or Holdings Owners who purchased Disposition Shares pursuant to Section 3(c)(i), (each recipient is referred to as a “Tag-Along Owner”) to purchase a Proportionate Share of the Owner Shares of each Tag-Along Owner. Any such purchase shall be made in accordance with the following:

(A) the purchase from each Tag-Along Owner shall be made at the highest price per share and on such other terms and conditions as the Proposed Purchaser has offered

to purchase Disposition Shares from the Selling Owner;

(B) each Tag-Along Owner shall have no more than 20 days from the receipt of the Purchase Offer in which to accept such Purchase Offer, in whole or in part;

(C) to the extent that a Tag-Along Owner accepts such Purchase Offer, the number of Owner Shares to be sold to the Proposed Purchaser by the Selling Owner shall be reduced to the extent necessary to comply with this Section 3; and

(D) the closing of such purchase shall occur within 30 days after such acceptance or at such other time as the Selling Owners, the Tag-Along Owner and the Proposed Purchaser may agree.

(d) Drag-Along Rights. Any time an Owner proposes a Drag-Along Transaction and if such proposed Drag-Along Transaction has been approved by an Owner Majority (any such Drag-Along Transaction approved by an Owner Majority, an “Approved Sale”), then all Owners shall consent to and raise no objections against the Approved Sale, and if the Approved Sale is structured as (i) a merger, share exchange or consolidation of the Company, or a sale of all or substantially all of the assets of the Company, each Owner shall vote in favor of the Approved Sale and shall waive any dissenters rights, appraisal rights or similar rights in connection with such merger, consolidation or asset sale, or (ii) a sale of Common Stock, the Owners shall agree to sell all their respective Owner Shares which are the subject of the Approved Sale, on the terms and conditions of such Approved Sale. The Owners shall promptly take all necessary and desirable actions in connection with the consummation of the Approved Sale, including using their reasonable best efforts to obtain Board consent to the Approved Sale and the execution of such agreements and such instruments and other actions reasonably necessary to (A) provide customary representations, warranties, indemnities, and escrow arrangements relating to such Approved Sale and (B) effectuate the allocation and distribution of the aggregate consideration upon the Approved Sale. The Owners shall be permitted to sell their respective Owner Shares pursuant to an Approved Sale without complying with any other provisions of this Section 3. In furtherance of, but only to the extent that an Owner breaches its obligations under, this Section 3(d), each of the Owners hereby (i) irrevocably appoints the designee of the Owner Majority as its agent and attorney-in-fact (the “Agent”) (with full power of substitution) to execute all agreements, instruments and certificates and take all actions necessary or desirable to effectuate any Approved Sale hereunder; and (ii) grants to the Agent a proxy (which shall be deemed to be coupled with an interest and irrevocable) to vote the shares held by such Owner in favor of any Approved Sale hereunder. Furthermore, in connection with an Approved Sale pursuant to this Section 3(d), the Owner Majority shall have the right to require the Company to cooperate fully with potential acquirors of the Company in a prospective transaction pursuant to this Section 3(d) by taking all customary and other actions reasonably requested by such Persons or such potential acquirors, including without limitation, making the Company’s properties, books and records, and other assets reasonably available for inspection by such potential acquirors and making its employees reasonably available for interviews.

(e) Excluded Transfers. Notwithstanding the foregoing, the provisions of this Section 3 do not apply to any Transfer by an Owner of his Owner Shares in an Excluded Affiliate Transfer or any Transfer by an Owner of his Owner Shares in connection with the initial sale of shares of the

Company’s Common Stock to the public pursuant to a registration statement filed under the Securities Act.

Section 4. Enforcement; Legends. No Owner Shares shall be transferred on the books of the Company nor shall any sale, assignment, transfer, pledge or other disposition thereof be effective unless and until the terms and provisions of this Agreement are first complied with and, in case of violation of this Agreement by the attempted transfer of Owner Shares without compliance with the terms and provisions hereof, such sale, assignment, transfer, pledge or other disposition shall be invalid and of no effect. Each certificate representing Owner Shares held by the shall bear a legend containing the following words (in addition to any other legend required by applicable law to be set forth on any certificate representing such Owner Shares) and such legend shall be removed from the certificates evidencing any shares which cease to be “Owner Shares,” as set forth in the definition of such term in Section 2 hereof:

“THE SECURITIES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO THE TERMS OF THAT CERTAIN STOCKHOLDERS’ AGREEMENT, DATED AS OF FEBRUARY 27, 2006, BY AND AMONG CONCHO RESOURCES INC. (THE “COMPANY”) AND CERTAIN STOCKHOLDERS OF THE COMPANY. COPIES OF SUCH AGREEMENT MAY BE OBTAINED AT NO COST BY WRITTEN REQUEST MADE BY THE HOLDER OF RECORD OF THIS CERTIFICATE TO THE SECRETARY OF THE COMPANY.”

Section 5. New Issuances of Shares. Any person that acquires shares of Common Stock prior to the Company’s initial public offering of its securities, shall be required to become a party to this Agreement, by executing a signature page hereto and by delivering a copy thereof to the Company.

Section 6. Right of First Offer on Subsequent Issuances.

(a) General. Each Owner has the right to purchase up to such Owner’s Pro Rata Share, of all or any part of any New Securities that the Company may from time to time issue after the date of this Agreement, provided such Owner is an Accredited Investor at the time of such issuance.

(b) Procedures. In the event that the Company proposes to undertake an issuance of New Securities, it shall give to each Owner written notice of its intention to issue New Securities (the “Rights Notice”), describing the type of New Securities and the price and the general terms upon which the Company proposes to issue such New Securities. Each Owner shall have 15 days from the date of receipt of any such Rights Notice to agree in writing to purchase up to such Owner’s Pro Rata Share of such New Securities for the price and upon the general terms specified in the Rights Notice by giving written notice to the Company and stating therein the quantity of New Securities to be purchased (not to exceed such Owner’s Pro Rata Share) and representing to the Company that such Owner is an Accredited Investor. If any Owner fails to so agree and represent in writing within such 15 day period to purchase such Owner’s full Pro Rata Share of an offering of New Securities (a “Nonpurchasing Holder”), then such Nonpurchasing Holder shall forfeit the right hereunder to purchase that part of his Pro Rata Share of such New Securities that he did not so agree to purchase and the Company shall promptly give each Owner who has timely agreed to purchase his full Pro

Rata Share of such offering of New Securities (a “Purchasing Holder”) written notice of the failure of any Nonpurchasing Holder to purchase such Nonpurchasing Holder’s full Pro Rata Share of such offering of New Securities (the “Overallotment Notice”). Each Purchasing Holder shall have a right of overallotment such that such Purchasing Holder may agree to purchase a portion of the Nonpurchasing Holders’ unpurchased Pro Rata Shares of such offering on a pro rata basis according to the relative Pro Rata Shares of the Purchasing Holders, at any time within 15 days after receiving the Overallotment Notice.

(c) Failure to Exercise. In the event that the Owners fail to exercise in full the right of first offer within such 15 plus 15 day period, then the Company shall have 60 days thereafter to sell the New Securities with respect to which the Owners’ rights of first offer hereunder were not exercised, at a price and upon general terms not more favorable to the purchasers thereof than specified in the Company’s Notice to the Owners. In the event that the Company has not issued and sold the New Securities within such 60 day period, then the Company shall not thereafter issue or sell any New Securities without again first offering such New Securities to the Owners pursuant to this Section 6.

(d) Waiver. Any provision of this Section 6 may be amended and the observance thereof may be waived (either generally or in a particular instance and either retroactively or prospectively), upon the written consent of an Owner Majority. Any amendment or waiver effected in accordance with this Section 6(d) shall be binding upon each Owner and the Company.

Section 7. Auction Right.

(a) If, prior to March 1, 2010, the Company has not completed an initial public offering of shares of its Common Stock pursuant to a registration statement filed under the Securities Act, then the holders of at least 25% of the Owner Shares (the “Initiating Owners”) may solicit bids from bona fide third-party acquirors regarding the sale of the Company (an “Auction”).

(b) If, pursuant to the Auction, the Company receives a bid from a bona fide third-party acquiror with terms and at a valuation acceptable to the Initiating Owners, and an investment banking firm with an industry-wide recognized mergers and acquisitions advisory business among exploration and production companies (the “Advisor”) is willing to deliver to the Company an opinion that the consideration set forth in such bid is fair to the Owners from a financial point of view (the “Approved Transaction”), then all of the Owners shall consent to, raise no objections to and take all other necessary actions to consummate the Approved Transaction. Without limiting the generality of the preceding sentence, the Owners shall promptly take all necessary and desirable actions in connection with the consummation of the Approved Transaction, including, without limitation, the execution and delivery of such agreements and instruments and the taking of all other actions necessary or desirable to (A) provide customary representations, warranties, indemnities, and escrow arrangements relating to such Approved Transaction and (B) effectuate the allocation and distribution of the aggregate consideration upon the Approved Transaction.

(c) In furtherance of, but only to the extent that an Owner breaches its obligations under, this Section 7, each Owner is hereby deemed to have (i) irrevocably appointed the designee of the Initiating Owners as its agent and attorney-in-fact (the “Auction Agent”) (with full power of substitution) to execute all agreements, instruments and certificates and take all actions necessary or

desirable to effectuate any Approved Transaction hereunder; and (ii) granted to the Auction Agent a proxy (which shall be deemed to be coupled with an interest and irrevocable) to vote the shares held by such Owner in favor of any Approved Transaction hereunder.

(d) The Approved Transaction shall be completed as soon as practicable upon the Company’s receipt of the Advisor’s fairness opinion relating to the Approved Transaction, and in any event within 60 days after the Company’s receipt of the Advisor’s fairness opinion relating to the Approved Transaction.

(e) With respect to an Auction and/or an Approved Transaction, the powers of the Company shall be exercised by or under the authority of, and the business and affairs of the Company relative to the Auction and/or an Approved Transaction shall be managed under the direction of the Initiating Owners. The Initiating Owners shall have full power and authority to do all things on such terms as they may deem necessary or appropriate to conduct, or cause to be conducted, the business and affairs of the Company relating to an Auction and/or an Approved Transaction, including, without limitation:

(i) the engagement, at the Company’s expense, of an Advisor, pursuant to customary terms of engagement, for the purpose of marketing and soliciting indications of interest and bids for the Company from bona fide third-party acquirors;

(ii) the preparation by the Company of relevant diligence materials as requested by the Advisor; and

(iii) the response by the Company to inquiries from the Advisor and/or prospective purchasers in a reasonably prompt manner.

(f) The Owners shall be permitted to sell their respective Owner Shares pursuant to an Approved Transaction without complying with Section 3.

(g) Nothing contained herein shall prohibit any Owner from participating as a “bona fide third-party acquiror” under this Section 7 (the “Owner Bidder”); provided, however, that if the Approved Transaction does not result from a bid from the Owner Bidder, then the Owner Bidder shall nonetheless comply with this Section 7.

Section 8 Termination. This Agreement shall terminate upon the earlier of any one or more of the following: (i) the sale of all or substantially all the assets of the Company, (ii) an acquisition of the Company by another corporation or entity by sale of capital stock, consolidation, merger or other reorganization in which the holders of the Company’s outstanding voting stock immediately prior to such transaction own, immediately after such transaction, securities representing less than 50% of the voting power of the corporation or other entity surviving such transaction; (iii) the adjudication of the Company as a bankrupt, the execution by the Company of an assignment for the benefit of creditors or the appointment of a receiver of the Company; (iv) the voluntary or involuntary dissolution of the Company; (v) when there is otherwise only one surviving Owner as a party to this Agreement; (vi) upon the date on which the Company completes the initial sale of its shares of Common Stock to the public pursuant to a registration statement filed under the Securities Act; or (vii) the tenth anniversary of the date hereof.

Section 9 Miscellaneous.

(a) Benefit. This Agreement will only bind and inure to the benefit of, and will only be enforceable by and against, the Owners.

(b) Notices. Any notice, demand or other communication which any party to this Agreement may be required, or may elect, to give to anyone interested hereunder shall be validly given if personally delivered or sent by facsimile, registered or certified mail, return receipt requested, or reputable overnight courier service (providing next business day service), addressed to the recipient as follows:

If to the Company:

Concho Resources Inc.
550 West Texas Avenue
Suite 1300
Midland, Texas 79701
Attention: President
Facsimile: (432) 683-7441

If to any Owner to such Owner’s address as set forth on such Owner’s respective signature page to this Agreement; or, in either case, to such other address as such party may designate by written notice to the other parties hereto in accordance with the provisions of this Section 9. Notice shall be deemed to have been given when delivered personally or on the first business day following confirmation of the receipt of a facsimile, five (5) business days following the date of deposit with the U.S. Post Office or on the first business day following deposit with the office of such reputable courier service.

(c) GOVERNING LAW. THIS AGREEMENT AND THE RIGHTS AND DUTIES OF THE PARTIES HERETO SHALL BE GOVERNED BY AND CONSTRUED IN ACCORDANCE WITH THE LAWS OF THE STATE OF DELAWARE WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAWS.

(d) Number. Words in the singular shall be construed to include the plural and vice versa, unless the context otherwise requires.

(e) Gender. Pronouns in masculine, feminine, and neuter genders shall be construed to include any other gender, and words in the singular form shall be construed to include the plural and vice versa, unless the context otherwise requires.

(f) Headings. The headings appearing in this Agreement are inserted only for convenience of reference and in no way shall be construed to define, limit or describe the scope or intent of any provision of this Agreement.

(g) Severability. Every provision in this Agreement is intended to be severable. In the event that any provision in this Agreement shall be held invalid, the same shall not affect in any respect whatsoever the validity of the remaining provisions of this Agreement; provided, however, that if any such provision may be made enforceable by limitation thereof, then such provision shall be deemed to be so limited and shall be enforceable to the maximum extent permitted by applicable law.

(h) Counterparts. This Agreement may be executed in one or more counterparts, each of which shall be deemed an original and all of which shall constitute but one and the same instrument.

(i) Entirety and Modification. This Agreement constitutes the entire agreement of the parties hereto with respect to the subject matter hereof and may not be modified, supplemented or amended in any respect except by written instrument executed by all parties hereto.

[SIGNATURE PAGES FOLLOW]

Exhibit 5.6 (b)

REGISTRATION RIGHTS AGREEMENT

This REGISTRATION RIGHTS AGREEMENT (this “Agreement”) is dated as of February 27, 2006, by and among Concho Resources Inc., a Delaware corporation (the “Company”), the Persons listed on Schedule I attached hereto (the “Holdings Stockholders”), Chase Oil Corporation, a New Mexico corporation (“Chase”), Caza Energy LLC, a New Mexico limited liability company (“Caza”) and the Persons listed on Schedule II attached hereto (collectively, the “WI Owners,” and together with Chase and Caza, the “Chase Stockholders”).

Section 1. Background.

1.1 The Company has agreed to issue to the Holdings Stockholders and the Chase Stockholders shares of the Company’s Common Stock, pursuant to the transactions contemplated by that certain Combination Agreement dated as of February 24, 2006 by and among the Company, Concho Equity Holdings Corp., a Delaware corporation, the Holdings Stockholders and the Chase Stockholders (the “Combination Agreement”).

1.2 A Stockholders’ Agreement of even date herewith by and among the Company, the Holdings Stockholders and the Chase Stockholders (the “Stockholders’ Agreement”) is in place, pursuant to which the Holdings Stockholders and the Chase Stockholders have been granted a right of first offer to purchase New Securities (as defined in the Stockholders’ Agreement) that the Company may from time to time issue after the date of this Agreement.

Section 2. Definitions.

“Affiliate” shall mean with respect to any individual, corporation, partnership, association, trust, or any other entity (in each case, a “Person”), any Person which, directly or indirectly, controls, is controlled by or is under common control with such Person, including, without limitation any general partner, officer or director of such Person and any venture capital fund now or hereafter existing which is controlled by or under common control with one or more general partners or shares the same management company with such Person.

“Common Stock” shall mean shares of the Company’s common stock, par value $0.001 per share.

“Exchange Act” shall mean the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated thereunder.

“Form S-3” means such form under the Securities Act as in effect on the date hereof or any registration form under the Securities Act subsequently adopted by the SEC which permits inclusion or incorporation of substantial information by reference to other documents filed by the Company with the SEC.

“Holder” shall mean any Person owning or having the right to acquire Registrable Securities or any assignee thereof in accordance with Section 3.12 hereof.

“Initiating Holders” means, collectively, any Holders who properly initiate a registration request under this Agreement.

“IPO” means the Company’s first underwritten public offering of its Common Stock under the Securities Act.

“Qualified Public Offering” means the first closing of an underwritten public offering of Common Stock registered under the Securities Act, pursuant to which such shares of common stock are authorized and approved for listing on a national securities exchange or admitted to trading and quoted in the Nasdaq National Market or comparable system.

“register,” “registered,” and “registration” refer to a registration effected by preparing and filing a registration statement or similar document in compliance with the Securities Act, and the declaration or ordering of effectiveness of such registration statement or document.

“Registrable Securities” means any of the Company’s Common Stock issued to the Holdings Stockholders, the Chase Stockholders, any Person formerly a holder of oil and gas working interests related to Chase or an Affiliate of Chase and any former stockholder of Concho Holdings Equities, Inc. not listed on Schedule I pursuant to or in connection with the Combination Agreement or pursuant to the preemptive rights of the Holdings Stockholders and the Chase Stockholders granted under the Stockholders’ Agreement, and any securities issuable with respect to any such Common Stock by way of distribution or in connection with any reorganization, recapitalization, merger, consolidation or otherwise. As to any particular Registrable Securities, once issued such securities shall cease to be Registrable Securities when (a) a registration statement with respect to the sale of such securities shall have become effective under the Securities Act and such securities shall have been disposed of in accordance with such registration statement, (b) they shall have been distributed to the public pursuant to Rule 144 or Rule 144A (or any successor provision) under the Securities Act, (c) with respect to any Holder, such Holder is not an Affiliate of the Company, and such shares may be sold freely by such Holder without restriction under Rule 144(k) (or any successor provision), or (d) they shall have ceased to be outstanding.

“Registrable Securities then outstanding” means the number of shares determined by adding the number of shares of Common Stock outstanding which are, and the number of shares of Common Stock issuable pursuant to then exercisable or convertible securities which are, Registrable Securities.

“Requisite Chase Holders” means the holders of 20% of the Registrable Securities held by the Chase Stockholders.

“Requisite Holdings Holders” means the holders of 20% of the Registrable Securities held by the Holdings Stockholders.

“SEC” means the Securities and Exchange Commission.

“SEC Rule 144” means Rule 144 promulgated by the SEC under the Securities Act.

“SEC Rule 144(k)” means Rule 144(k) promulgated by the SEC under the Securities Act.

“SEC Rule 145” means Rule 145 promulgated by the SEC under the Securities Act.

“Securities Act” means the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder.

“Violation” means losses, claims, damages, or liabilities (joint or several) to which a party hereto may become subject under the Securities Act, the Exchange Act or other federal or state law, insofar as such losses, claims, damages, or liabilities (or actions in respect thereof) arise out of or are based upon any of the following statements, omissions or violations: (i) any untrue statement or alleged untrue statement of a material fact contained in such registration statement, including any preliminary prospectus or final prospectus contained therein or any amendments or supplements thereto, (ii) the omission or alleged omission to state therein a material fact required to be stated therein, or necessary to make the statements therein not misleading, or (iii) any violation or alleged violation by any other party hereto, of the Securities Act, the Exchange Act, any state securities law or any rule or regulation promulgated under the Securities Act, the Exchange Act or any state securities law.

Section 3. Registration Rights.

3.1 Request for Registration.

(a) If the Company shall receive at any time after the earlier of (i) a Qualified Public Offering or (ii) nine (9) months after the closing date of the Combination Agreement, subject to Section 3.11, a written request from the Requisite Chase Holders or the Requisite Holdings Holders that the Company file a registration statement under the Securities Act covering the registration of Registrable Securities with an anticipated aggregate offering price, net of underwriting discounts and commissions, exceeding $50,000,000, then the Company shall:

(i) within ten (10) days of the receipt thereof, give written notice of such request to all Holders;

(ii) as soon as reasonably practicable, file a registration statement under the Securities Act covering all Registrable Securities which the Holders request to be registered, which request shall be given within fifteen (15) days after mailing of the notice of the Company made in accordance with subsection 3.1(a)(i), subject to the limitations of subsection 3.1(b); and

(iii) use its commercially reasonable efforts to cause such registration statement to be declared effective by the SEC as soon as practicable after the initial filing thereof.

All requests made pursuant to this Section 3 will specify the amount of Registrable Securities to be registered and the intended methods of disposition thereof.

(b) If the Initiating Holders intend to distribute the Registrable Securities covered by their request by means of an underwriting, they shall so advise the Company as a part of their request made pursuant to subsection 3.1(a) and the Company shall

include such information in the written notice referred to in subsection 3.1(a). The underwriter will be selected by the Company. In such event, the right of any Holder to include such Holder’s Registrable Securities in such registration shall be conditioned upon such Holder’s participation in such underwriting and the inclusion of such Holder’s Registrable Securities in the underwriting to the extent provided herein. All Holders proposing to distribute their securities through such underwriting shall (together with the Company as provided in subsection 3.3(d)) enter into an underwriting agreement in customary form with the underwriter or underwriters selected for such underwriting. Notwithstanding any other provision of this Section 3.1, if the underwriter advises the Initiating Holders in writing that marketing factors require a limitation of the number of shares to be underwritten, then the Initiating Holders shall so advise all Holders of Registrable Securities which would otherwise be underwritten pursuant hereto, and the number of shares of Registrable Securities that may be included in the underwriting shall be allocated among all Holders of Registrable Securities, including the Initiating Holders, in proportion (as nearly as practicable) to the number of Registrable Securities of the Company owned by each Holder. To facilitate the allocation of shares in accordance with the above provisions, the Company or the underwriters may round the number of shares allocated to any Holder to the nearest 100 shares.

(i) more than one time in any six month period; or

(ii) in any particular jurisdiction in which the Company would be required to execute a general consent to service of process in effecting such registration, unless the Company is already subject to service in such jurisdiction and except as may be required under the Securities Act.

(d) Notwithstanding the foregoing, if the Company shall furnish to Holders requesting a registration statement pursuant to this Section 3.1 a certificate signed by the Chief Executive Officer of the Company stating that in the good faith judgment of the Board of Directors of the Company it would be materially detrimental to the Company and its stockholders for such registration statement to be filed and it is therefore necessary to defer the filing of such registration statement, the Company shall have the right to defer taking action with respect to such filing for a period of not more than ninety (90) days after receipt of the request of the Initiating Holders.

3.2 Company Registration. If the Company proposes to register (including for this purpose a registration effected by the Company for stockholders other than the Holders) any of its stock or other securities under the Securities Act in connection with the public offering of such securities by the Company solely for cash (other than a registration statement relating either to the sale of securities to employees of the Company pursuant to a stock option, stock purchase or similar plan or an SEC Rule 145 transaction, a registration on any form which does not include substantially the same information as would be required to be included in a registration statement covering the sale of the Registrable Securities, a registration statement on which the only Common Stock being registered is Common Stock issuable upon conversion of debt

securities which are also being registered, or a shelf registration on Form S-3), the Company shall, at such time, promptly give each Holder written notice of such registration. Upon the written request of each Holder given within twenty (20) days after mailing of such notice by the Company in accordance with Section 6, the Company shall, subject to the provisions of Section 3.7, cause to be registered under the Securities Act all of the Registrable Securities that each such Holder has requested to be registered. The Company shall have the right to terminate or withdraw any registration initiated by it under this Section 3.2 prior to the effectiveness of such registration whether or not any Holder has elected to include securities in such registration. The expenses of such withdrawn registration shall be borne by the Company in accordance with Section 3.6 hereof.

3.3 Obligations of the Company. Whenever required under this Section 3 to effect the registration of any Registrable Securities, the Company shall, as soon as reasonably practicable,

(a) prepare and file with the SEC a registration statement with respect to such Registrable Securities and use its commercially reasonable efforts to cause such registration statement to become effective, and, upon the request of the Holders of a majority of the Registrable Securities registered thereunder, keep such registration statement effective for a period of up to one hundred twenty (120) days or, if earlier, until the distribution contemplated in the Registration Statement has been completed;

(b) prepare and file with the SEC such amendments and supplements to such registration statement and the prospectus used in connection with such registration statement as may be necessary to comply with the provisions of the Securities Act with respect to the disposition of all securities covered by such registration statement;

(c) furnish to the Holders such numbers of copies of a prospectus, including a preliminary prospectus, in conformity with the requirements of the Securities Act, and such other documents as they may reasonably request in order to facilitate the disposition of Registrable Securities owned by them;

(d) in the event of any underwritten public offering, enter into and perform its obligations under an underwriting agreement, in usual and customary form, with the managing underwriter of such offering. Each Holder participating in such underwriting shall also enter into and perform its obligations under such an agreement;

(e) cause all such Registrable Securities registered pursuant to this Agreement hereunder to be listed on a national securities exchange or trading system and each securities exchange and trading system on which similar securities issued by the Company are then listed;

(f) provide a transfer agent and registrar for all Registrable Securities registered pursuant hereunder and a CUSIP number for all such Registrable Securities, in each case not later than the effective date of such registration statement;

(g) use its reasonable commercial efforts to furnish, at the request of any Holder requesting registration of Registrable Securities pursuant to this Section 3, on the

date on which such Registrable Securities are sold to the underwriter, (i) an opinion, dated such date, of the counsel representing the Company for the purposes of such registration, in form and substance as is customarily given to underwriters in an underwritten public offering, addressed to the underwriters, if any, and (ii) a “comfort” letter dated such date, from the independent certified public accountants of the Company, in form and substance as is customarily given by independent certified public accountants to underwriters in an underwritten public offering, addressed to the underwriters, if any.

3.4 Furnish Information. It shall be a condition precedent to the obligations of the Company to take any action pursuant to this Section 3 with respect to the Registrable Securities of any selling Holder that such Holder shall furnish to the Company such information regarding itself, the Registrable Securities held by it, and the intended method of disposition of such securities as shall be reasonably required to effect the registration of such Holder’s Registrable Securities.

3.5 Expenses of Demand Registration. All expenses, other than underwriting discounts and commissions and the fees of counsel for such Holders incurred in connection with registrations, filings or qualifications pursuant to Section 3.1, including (without limitation) all registration, filing and qualification fees, printers’ and accounting fees, fees and disbursements of counsel for the Company shall be borne by the Company.

3.6 Expenses of Company Registration. The Company shall bear and pay all expenses incurred in connection with any registration, filing or qualification of Registrable Securities with respect to the registrations pursuant to Section 3.2 hereof for each Holder (which right may be assigned as provided in Section 3.10 hereof), including (without limitation) all registration, filing, and qualification fees, printers and accounting fees relating or apportionable thereto, but excluding underwriting discounts and commissions relating to Registrable Securities.

3.7 Underwriting Requirements. In connection with any offering involving an underwriting of shares of the Company’s capital stock pursuant to Section 3.2, the Company shall not be required to include any of the Holders’ securities in such underwriting unless they accept the terms of the underwriting as agreed upon between the Company and its underwriters, and then only in such quantity as the underwriters determine in their sole discretion will not jeopardize the success of the offering by the Company. If the total number of securities, including Registrable Securities, requested by stockholders to be included in such offering exceeds the amount of securities to be sold other than by the Company that the underwriters determine in their reasonable discretion is compatible with the success of the offering, then the Company shall be required to include in the offering only that number of such securities, including Registrable Securities, which the underwriters and the Company determine in their sole discretion will not jeopardize the success of the offering. In the event that the underwriters determine that less than all of the Registrable Securities requested to be registered can be included in such offering, then the Registrable Securities that are included in such offering shall be apportioned pro rata among the selling Holders based on the number of Registrable Securities held by all selling stockholders participating in such offering or in such other proportions as shall mutually be agreed to by all such selling Holders.

3.8 Delay of Registration/Effectiveness.

(a) No Holder shall have any right to obtain or seek an injunction restraining or otherwise delaying any registration pursuant to this Agreement as the result of any controversy that might arise with respect to the interpretation or implementation of this Section 3.

(b) The Company will notify the Holders requesting registration pursuant to this Agreement, at any time when a prospectus relating to the requisite registration statement is required to be delivered under the Securities Act (within the period that the Company is required to keep such registration statement effective), of the happening of any event as a result of which the prospectus included in the requisite registration statement (as then in effect) contains an untrue statement of a material fact or omits to state any material fact required to be stated in the prospectus or that is necessary to make the statements in the prospectus, in light of the circumstances in which they were made, not misleading. The Company will prepare (and, as soon as reasonably practicable, file) a supplement or amendment to that prospectus so that, as thereafter delivered to the purchasers of those securities covered by such registration statement, that prospectus will not contain an untrue statement of a material fact or omit to state any material fact required to be stated in the prospectus or that is necessary to make the statements in the prospectus, in light of the circumstances in which they were made, not misleading. However, if the Board of Directors of the Company determines in its good faith judgment that filing any supplement or amendment to such registration statement to keep such registration statement available for use by such Holders for resales of the securities covered by such registration statement would require the Company to disclose material information that the Company has a bona fide business purpose for preserving as confidential, then, upon the Company’s notice to each Holder (the “Suspension Notice”), the Company’s obligation to supplement or amend such registration statement will be suspended. That suspension will remain in effect until the Company notifies such Holders in writing that the reasons for suspending those obligations no longer exist and the Company amends or supplements such registration statement as may be required. As soon as a Holder receives a Suspension Notice from the Company under this Section 3.8(b), that Holder will immediately discontinue disposing of securities covered by such registration statement until that Holder receives copies of the supplemented or amended prospectus referred to in this Section 3.8(b). At the Company’s request, each Holder will deliver to the Company all copies of the prospectus covering such securities current at the time of that request.

3.9 Indemnification. In the event any Registrable Securities are included in a registration statement under this Section 3:

(a) To the extent permitted by law, the Company will indemnify and hold harmless each Holder, the partners, members, officers, directors and stockholders of each Holder, legal counsel and accountants for each Holder, any underwriter (as defined in the Securities Act) for such Holder and each person, if any, who controls such Holder or underwriter within the meaning of the Securities Act or the Exchange Act, against any Violation and the Company will pay to each such Holder, underwriter, controlling person

or other aforementioned person, any legal or other expenses reasonably incurred by them in connection with investigating or defending any such loss, claim, damage, liability, or action as such expenses are incurred; provided, however, that the indemnity agreement contained in this subsection 3.9(a) shall not apply to amounts paid in settlement of any such loss, claim, damage, liability, or action if such settlement is effected without the consent of the Company (which consent shall not be unreasonably withheld), nor shall the Company be liable in any such case for any such loss, claim, damage, liability, or action to the extent that it arises out of or is based upon a Violation which occurs in reliance upon and in conformity with written information furnished expressly for use in connection with such registration by any such Holder, underwriter, controlling person or other aforementioned person.

(b) To the extent permitted by law, each selling Holder will severally and not jointly indemnify and hold harmless the Company, each of its directors, each of its officers who has signed the registration statement, each person, if any, who controls the Company within the meaning of the Securities Act, legal counsel and accountants for the Company, any underwriter, any other Holder selling securities in such registration statement and any controlling person of any such underwriter or other Holder, against any losses, claims, damages, or liabilities (joint or several) to which any of the foregoing persons may become subject, under the Securities Act, the Exchange Act or other federal or state law, insofar as such losses, claims, damages, or liabilities (or actions in respect thereto) arise out of or are based upon any Violation, in each case to the extent (and only to the extent) that such Violation occurs in reliance upon and in conformity with written information furnished by such Holder expressly for use in connection with such registration statement; and each such Holder will pay any legal or other expenses reasonably incurred by any person intended to be indemnified pursuant to this subsection 3.9(b), in connection with investigating or defending any such loss, claim, damage, liability, or action; provided, however, that the indemnity agreement contained in this subsection 3.9(b) shall not apply to amounts paid in settlement of any such loss, claim, damage, liability or action if such settlement is effected without the consent of the Holder, which consent shall not be unreasonably withheld; provided, further, that, in no event shall any indemnity under this subsection 3.9(b) exceed the net proceeds from the offering received by such Holder, except in the case of fraud or willful misconduct by such Holder.

(c) Promptly after receipt by an indemnified party under this Section 3.9 of notice of the commencement of any action (including any governmental action), such indemnified party will, if a claim in respect thereof is to be made against any indemnifying party under this Section 3.9, deliver to the indemnifying party a written notice of the commencement thereof and the indemnifying party shall have the right to participate in, and, to the extent the indemnifying party so desires, jointly with any other indemnifying party similarly noticed, to assume the defense thereof with counsel mutually satisfactory to the parties; provided, however, that an indemnified party (together with all other indemnified parties which may be represented without conflict by one counsel) shall have the right to retain one separate counsel, with the fees and expenses to be paid by the indemnifying party, if representation of such indemnified party by the counsel retained by the indemnifying party would be inappropriate due to

actual or potential differing interests between such indemnified party and any other party represented by such counsel in such proceeding. The failure to deliver written notice to the indemnifying party within a reasonable time of the commencement of any such action, if prejudicial to its ability to defend such action, shall relieve such indemnifying party of any liability to the indemnified party under this Section 3.9, but the omission so to deliver written notice to the indemnifying party will not relieve it of any liability that it may have to any indemnified party otherwise than under this Section 3.9.

(d) In order to provide for just and equitable contribution to joint liability under the Securities Act in any case in which either (i) any Holder exercising rights under this Agreement, or any controlling person of any such Holder, makes a claim for indemnification pursuant to this Section 3.9 but it is judicially determined (by the entry of a final judgment or decree by a court of competent jurisdiction and the expiration of time to appeal or the denial of the last right of appeal) that such indemnification may not be enforced in such case notwithstanding the fact that this Section 3.9 provides for indemnification in such case, or (ii) contribution under the Securities Act may be required on the part of any such selling Holder or any such controlling person in circumstances for which indemnification is provided under this Section 3.9, then, and in each such case, the Company and such Holder will contribute to the aggregate losses, claims, damages or liabilities to which they may be subject (after contribution from others) in such proportion as is appropriate to reflect the relative fault of the indemnifying party on the one hand and of the indemnified party on the other in connection with the statements or omissions that resulted in such loss, liability, claim, damage, or expense as well as any other relevant equitable considerations. The relative fault of the indemnifying party and of the indemnified party shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the indemnifying party or by the indemnified party and the parties’ relative intent, knowledge, access to information, and opportunity to correct or prevent such statement or omission; provided however, that, in any such case, (I) no such Holder will be required to contribute any amount in excess of the public offering price of all such Registrable Securities offered and sold by such Holder pursuant to such registration statement, and (II) no person or entity guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) will be entitled to contribution from any person or entity who was not guilty of such fraudulent misrepresentation; provided further, that in no event shall a Holder’s liability pursuant to this Section 3.9(d), when combined with the amounts paid or payable by such holder pursuant to Section 3.9(b), exceed the proceeds from the offering (net of any underwriting discounts or commissions) received by such Holder, except in the case of willful fraud by such Holder.

(e) Notwithstanding the foregoing, to the extent that the provisions on indemnification and contribution contained in the underwriting agreement entered into in connection with the underwritten public offering are in conflict with the foregoing provisions, the provisions in the underwriting agreement shall control.

(f) Unless otherwise superseded by an underwriting agreement entered into in connection with the underwritten public offering, the obligations of the Company and

Holders under this Section 3.9 shall survive the completion of any offering of Registrable Securities in a registration statement under this Section 3, and shall survive the termination of this Agreement.

3.10 Assignment of Registration Rights. The rights to cause the Company to register Registrable Securities pursuant to this Section 3 may be assigned (but only with all related obligations) by a Holder to a transferee or assignee of such securities that (i) is a subsidiary, Affiliate, parent, partner, member, limited partner, retired partner, retired member or stockholder of a Holder or (ii) is a Holder’s family member or trust for the benefit of an individual Holder, provided: (a) the Company is, within a reasonable time after such transfer, furnished with written notice of the name and address of such transferee or assignee and the securities with respect to which such registration rights are being assigned; (b) such transferee or assignee agrees in writing to be bound by and subject to the terms and conditions of this Agreement, including without limitation the provisions of Section 3.11 below; and (c) such assignment shall be effective only if immediately following such transfer the further disposition of such securities by the transferee or assignee is restricted under the Securities Act.

3.11 “Market Stand-Off” Agreement. Each Holder hereby agrees that it will not, without the prior written consent of the managing underwriter, during the period commencing on the date of the final prospectus relating to the Company’s IPO and ending on the date specified by the Company and the managing underwriter (such period not to exceed l80 days) (i) lend, offer, pledge, sell, contract to sell, sell any option or contract to purchase, purchase any option or contract to sell, grant any option, right or warrant to purchase, or otherwise transfer or dispose of, directly or indirectly, any shares of Common Stock or any securities convertible into or exercisable or exchangeable for Common Stock (whether such shares or any such securities are then owned by the Holder or are thereafter acquired) held immediately prior to the effectiveness of the Registration Statement for such offering, or (ii) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the economic consequences of ownership of the Common Stock, whether any such transaction described in clause (i) or (ii) above is to be settled by delivery of Common Stock or other securities, in cash or otherwise. The foregoing provisions of this Section 3.11 shall apply only to the Company’s IPO, shall not apply to the sale of any shares to an underwriter pursuant to an underwriting agreement, and shall only be applicable to the Holders if all officers, directors and greater than five percent stockholders of the Company enter into similar agreements. The underwriters in connection with the Company’s IPO are intended third-party beneficiaries of this Section 3.11 and shall have the right, power and authority to enforce the provisions hereof as though they were a party hereto. Each Holder further agrees to execute such agreements as may be reasonably requested by the underwriters in the Company’s IPO that are consistent with this Section 3.11 or that are necessary to give further effect thereto.

3.12 Termination of Registration Rights. No Holder shall be entitled to exercise any right provided for in this Section 3 after ten years following the consummation of the IPO.

Section 4. Amendments and Waivers. This Agreement may be amended and the Company may take any action herein prohibited or omit to perform any act herein required to be performed by it, only if the Company shall have obtained the written consent to such amendment, action or omission to act, of the Requisite Chase Holders and the Requisite Holdings

Holders. The Holders of any Registrable Securities at the time or thereafter outstanding shall be bound by any consent authorized by this Section 4, whether or not such Registrable Securities shall have been marked to indicate such consent.

Section 5. Nominees for Beneficial Holders. In the event that any Registrable Securities are held by a nominee for the beneficial owner thereof, the beneficial owner thereof may, at its election, be treated as the holder of such Registrable Securities for purposes of this Agreement. If the beneficial owner of any Registrable Securities so elects, the Company may require assurances reasonably satisfactory to it of such owner’s beneficial ownership of such Registrable Securities.

Section 6. Notices. All communications provided for hereunder shall be personally delivered or sent by facsimile, registered or certified mail, return receipt requested, or reputable overnight courier service (providing next business day service) and (a) if addressed to any Holder, to the address set forth opposite such Holder’s name on the counterpart signature page to this Agreement or such other address specified in writing by such Holder upon its receipt of Registrable Securities, or (b) if addressed to the Company, at 550 West Texas Avenue, Suite 1300, Midland, Texas 79701, Attn: President, Facsimile: (432) 683-7441, or at such other address, or to the attention of such other officer, as the Company shall have furnished to the Holders at the time outstanding; provided, however, that any such communication to the Company may also, at the option of any Holder, be either delivered to the Company at its address set forth above or to any officer of the Company.

Section 7. Transfers, Successors and Assigns. The terms and conditions of this Agreement shall inure to the benefit of and be binding upon the respective successors and assigns of the parties. Nothing in this Agreement, express or implied, is intended to confer upon any party other than the parties hereto or their respective successors and assigns any rights, remedies, obligations, or liabilities under or by reason of this Agreement, except as expressly provided in this Agreement.

Section 8. Effectiveness; Termination. This Agreement shall become effective only upon consummation of the transactions contemplated by the Combination Agreement, and shall terminate if the Combination Agreement is terminated in accordance with its terms. After this Agreement becomes effective, this Agreement shall terminate when no Registrable Securities remain outstanding.

Section 9. Descriptive Headings. The descriptive headings of the several sections and paragraphs of this Agreement are inserted for reference only and shall not limit or otherwise affect the meaning hereof.

Section 10. Specific Performance. The parties hereto recognize and agree that money damages may be insufficient to compensate the Holders for breaches by the Company of the terms hereof and, consequently, that the equitable remedy of specific performance of the terms hereof will be available in the event of any such breach.

Section 11. Cost of Enforcement. If any Party to this Agreement seeks to enforce its rights under this Agreement by legal proceedings, the non-prevailing Party shall pay all costs and

expenses incurred by the prevailing Party, including, without limitation, all reasonable attorneys’ fees.

Section 12. Severability. The invalidity of unenforceability of any provision hereof shall in no way affect the validity or enforceability of any other provision.

Section 13. Aggregation of Stock. All shares of Registrable Securities held or acquired by Affiliates shall be aggregated together for the purpose of determining the availability of any rights under this Agreement.

Section 14. Entire Agreement. This Agreement (including the Exhibits hereto, if any) constitutes the full and entire understanding and agreement between the parties with respect to the subject matter hereof, and any other written or oral agreement relating to the subject matter hereof existing between the parties are expressly canceled.

Section 15. Governing Law. THIS AGREEMENT SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH, AND THE RIGHTS OF THE PARTIES SHALL BE GOVERNED BY, THE LAWS OF THE STATE OF DELAWARE WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAWS.

Section 16. Counterparts. This Agreement may be executed simultaneously in any number of counterparts, each of which shall be deemed an original, but all such counterparts shall together constitute one and the same instrument.

Section 17. Delays or Omissions. No delay or omission to exercise any right, power or remedy accruing to any party under this Agreement, upon any breach or default of any other party under this Agreement, shall impair any such right, power or remedy of such non-breaching or non-defaulting party nor shall it be construed to be a waiver of any such breach or default, or an acquiescence therein, or of or in any similar breach or default thereafter occurring; nor shall any waiver of any single breach or default be deemed a waiver of any other breach or default theretofore or thereafter occurring. Any waiver, permit, consent or approval of any kind or character on the part of any party of any breach or default under this Agreement, or any waiver on the part of any party of any provisions or conditions of this Agreement, must be in writing and shall be effective only to the extent specifically set forth in such writing. All remedies, either under this Agreement or by law or otherwise afforded to any party, shall be cumulative and not alternative.

[SIGNATURE PAGES FOLLOW]

Exhibit 5.6 (c)

VOTING AGREEMENT

This VOTING AGREEMENT (this “Agreement”) is date as of February 27, 2006 by and among Concho Resources Inc., a Delaware corporation (the “Company”), the Persons listed on Schedule I attached hereto (collectively, the “Holdings Stockholders”), Chase Oil Corporation, a New Mexico corporation (“Chase”), Caza Energy LLC, a New Mexico limited liability company (“Caza”) and the Persons listed on Schedule II attached hereto (collectively, the “WI Owners,” and together with Chase and Caza, the “Chase Stockholders”). The Holdings Stockholders and the Chase Stockholders are sometimes hereinafter referred to individually as a “Stockholder” and collectively as the “Stockholders.”

Section 1. Background.

1.1. The Company has agreed to issue to the Holdings Stockholders and the Chase Stockholders certain shares of the Company’s common stock, par value $0.001 per share (the “Common Stock”), pursuant to the transactions (the “Combination”) contemplated by that certain Combination Agreement dated as of February 24, 2006 by and among the Company, Holdings, the Holdings Stockholders and the Chase Stockholders (the “Combination Agreement”).

1.2. A Stockholders’ Agreement of even date herewith by and among the Company and the Stockholders (the “Stockholders’ Agreement”) is in place pursuant to which, among other things, the Stockholders have been granted a right of first offer to purchase New Securities (as defined in the Stockholders’ Agreement) that the Company may from time to time issue after the date of this Agreement.

Section 2. Definitions. As used herein, unless the context otherwise requires, the following terms have the following respective meanings:

“Affiliate” means, with respect to any Person, any other Person that, directly or indirectly, controls, is controlled by or is under common control with, such specified Person through one or more intermediaries or otherwise. For purposes of this definition, “control” means, where used with respect to any Person, the possession, directly or indirectly, of the power to direct or cause the direction of the management and policies of such Person, whether through the ownership of voting securities, by contract or otherwise, and the terms “controlling” and “controlled” have correlative meanings.

“Board” means the Board of Directors of the Company.

“Capital Stock” means the Common Stock and any other capital stock of the Company.

“Chase Ownership Percentage” means the percentage obtained by multiplying 100 by an amount equal to (i) the number of shares of Common Stock beneficially owned by the Chase Stockholders and their Affiliates divided by (ii) the number of shares of Common Stock issued and outstanding.

“Director” means a member of the Board of Directors of the Company.

“Holdings Ownership Percentage” means the percentage obtained by multiplying 100 by an amount equal to (A) the number of shares of Common Stock beneficially owned by the Holdings Stockholders and their Affiliates divided by (B) the number of shares of Common Stock issued and outstanding.

“Person” means a corporation, an association, a partnership, a business, an individual, a governmental or political subdivision thereof or a governmental agency.

Section 3. Shares Subject to Agreement. Each of the Stockholders agrees that all shares of Capital Stock of the Company registered in their respective names or beneficially owned by such Stockholder as of the date hereof and any and all other Capital Stock of the Company legally or beneficially acquired by such Stockholder after the date hereof shall be subject to the provisions of this Agreement.

Section 4. Termination. This Agreement shall terminate upon the earlier of any one or more of the following: (i) the sale of all or substantially all the assets of the Company, (ii) an acquisition of the Company by another corporation or entity by sale of capital stock, consolidation, merger or other reorganization in which the holders of the Company’s outstanding voting stock immediately prior to such transaction own, immediately after such transaction, securities representing less than 50% of the voting power of the corporation, or other entity surviving such transaction; (iii) the adjudication of the Company as a bankrupt, the execution by the Company of an assignment for the benefit of creditors or the appointment of a receiver of the Company; (iv) the voluntary or involuntary dissolution of the Company; (v) when there is otherwise only one surviving Stockholder as a party to this Agreement; (vi) upon the date on which the Company completes the initial sale of its shares of Common Stock to the public pursuant to a registration statement filed under the Securities Act; or (vii) the tenth anniversary of the date hereof.

Section 5. Combination Agreement. Subject to Section 4, the parties acknowledge that pursuant to the Combination Agreement, the Company, the Holdings Stockholders and the Chase Stockholders have agreed to cause the Directors of the Company from and after the Effective Date, and until the next annual meeting of stockholders and until their respective successors are duly qualified and elected, to consist of: Brad Bartek, Johnny Knorr, Robert Chase (collectively, the “Initial Chase Directors”) and two individuals nominated by Chase and approved by the Initial Chase Directors and the Initial Holdings Directors (defined below), which approval shall not be unreasonably withheld, to be elected to the Board (one of whom shall satisfy the independence standards of the New York Stock Exchange and the Nasdaq National Market for audit committee members and shall qualify as an audit committee financial expert under the rules and regulations of the Securities and Exchange Commission), and Timothy A. Leach, Steven L. Beal, W. Howard Keenan, Jr., Tucker S. Bridwell, A. Wellford Tabor (collectively, the “Initial Holdings Directors,” and together with the Initial Chase Directors, the “Initial Directors”).

Section 6. Election of Directors.

6.1. Subject to applicable law and stock exchange and securities market rules, during the term of this Agreement, the Company shall take all such action as may be necessary to cause

the nomination for election as Directors of the Company to be the slate of nominees as selected in accordance with Section 6.3 of this Agreement.

6.2. At each election of Directors of the Company during the term of this Agreement each of the Stockholders shall vote (including the taking of any action by written consent, as necessary or appropriate) all shares of Capital Stock which such Stockholder is entitled to vote in favor of the slate of nominees as selected in accordance with Section 6.3 for election to the Board.

6.3. For purposes of selecting the slate of nominees referred to in Sections 6.1 and 6.2:

	(a)		A majority-in-interest of the Chase Stockholders shall be entitled to nominate five (5) Directors (the “Chase Directors”), three of whom shall initially be Brad Bartek, Johnny Knorr, Robert Chase, and two of whom will be the individuals nominated by Chase and approved by the Initial Directors in accordance with such section.

	(b)		A majority-in-interest of the Holdings Stockholders shall be entitled to nominate five (5) Directors (the “Holdings Directors”), who shall initially be Timothy A. Leach, Steven L. Beal, W. Howard Keenan, Jr., Tucker S. Bridwell and A. Wellford Tabor.

6.4. Subject to applicable law and stock exchange and securities market rules, in the event that any Initial Chase Director or any Chase Director is unable to serve, or once having commenced to serve, ceases for any reason to be a Director (a “Withdrawing Chase Director”), such Withdrawing Chase Director’s replacement (the “Substitute Chase Director”) on the Board shall be designated by a majority of the remaining Initial Chase Directors or Chase Directors, as applicable, serving as Directors at such time for the remainder of such Withdrawing Chase Director’s term as a Director. Subject to applicable law and stock exchange and securities market rules, each of the Stockholders agrees to take all action within such Stockholder’s power, including, but not limited to, the voting of Capital Stock entitled to vote, upon the written request of a majority of the Initial Chase Directors or Chase Directors, as applicable, serving as Directors at such time, to remove, without cause, any relevant Initial Chase Director or Chase Director.

6.5. Subject to applicable law and stock exchange and securities market rules, in the event that any Initial Holdings Director or any Holdings Director is unable to serve, or once having commenced to serve, ceases for any reason to be a Director (a “Withdrawing Holdings Director”), such Withdrawing Holdings Director’s replacement (the “Substitute Holdings Director”) on the Board shall be designated by a majority of the remaining Initial Holdings Directors or Holdings Directors, as applicable, serving as Directors at such time for the remainder of such Withdrawing Holdings Director’s term as a Director. Subject to applicable law and stock exchange and securities market rules, each of the Stockholders agrees to take all action within such Stockholder’s power, including, but not limited to, the voting of Capital Stock entitled to vote, upon the written request of a majority of the Initial Holdings Directors or Holdings Directors, as applicable, serving as Directors at such time, to remove, without cause, any relevant Initial Holdings Director or Holdings Director.

Section 7. Number of Directors; Election of Directors; Committees; Classification.

Subject to applicable law and stock exchange and securities market rules, and except as otherwise provided herein, each of the Stockholders shall vote all shares of Capital Stock owned by such Stockholder, and the Company shall take all necessary and desirable actions within its control (including, without limitation, calling and holding special Board and stockholder meetings), so that:

	(a)		the authorized number of Directors on the Board shall be ten;

	(b)		the Chase Directors and the Holdings Directors shall be elected to the Board;

	(c)		no later than the initial filing of a registration statement with respect to the Company’s initial sale of its shares of Common Stock to the public pursuant to a registration statement filed under the Securities Act, the Company’s Amended and Restated Certificate of Incorporation and Bylaws be amended to provide that the Chase Directors and the Holdings Directors be divided among three (3) classes with each class being comprised of, as nearly as possible, an equal number of Chase Directors and Holdings Directors;

	(d)		each Chase Director (including any Substitute Chase Director) and each Holdings Director (including any Substitute Holdings Director) then serving as a Director shall, prior to the expiration of such Director’s term, be nominated to serve for a successive term as a Chase Director or a Holdings Director, as applicable, unless notified by a majority-in-interest of the (i) Chase Stockholders in the case of a Chase Director or (ii) Holdings Stockholders in the case of a Holdings Director, of a new nominee to be elected in lieu of such Chase Director or Holdings Director, as applicable; and

	(e)		the audit committee, the compensation committee and all other authorized committees of the Board shall consist of an equal number of Chase Directors and Holdings Directors.

Section 8. Legends. Each certificate representing shares of Capital Stock held by the Holdings Stockholders and the Chase Stockholders shall bear a legend containing the following words (in addition to any other legend required by applicable law to be set forth on any certificate representing such shares of Capital Stock):

“THE SECURITIES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO THE TERMS OF THAT CERTAIN VOTING AGREEMENT, DATED AS OF FEBRUARY 27, 2006, BY AND AMONG CONCHO RESOURCES INC. (THE “COMPANY”) AND CERTAIN STOCKHOLDERS OF THE COMPANY. COPIES OF SUCH AGREEMENT MAY BE OBTAINED AT NO COST BY WRITTEN REQUEST MADE BY THE HOLDER OF RECORD OF THIS CERTIFICATE TO THE SECRETARY OF THE COMPANY.”

Section 9. Ownership and Transfers of Shares. Each Stockholder represents and warrants to the Company that at all times during the term of this Agreement the Stockholder

shall not transfer the right to vote any shares of Capital Stock (whether by transfer of the shares of Capital Stock or otherwise) to any Person not a party to this Agreement, unless the transferee of the right to vote such shares of Capital Stock, as a condition of such transfer, becomes a party to this Agreement as a “Chase Stockholder” or a “Concho Stockholder,” as applicable, by executing a signature page hereto and by delivering a copy thereof to the Company.

Section 10. New Issuances of Shares. Any person that acquires shares of Common Stock prior to the Company’s initial public offering of its securities, shall be required to become a party to this Agreement, by executing a signature page hereto and by delivering a copy thereof to the Company.

Section 11. Entire Agreement; Amendments. This Agreement, together with such additional instruments as may be concurrently executed and delivered pursuant to this Agreement, constitutes the entire understanding of the parties with respect to its subject matter. There are no restrictions, agreements, promises, representations, warranties, covenants or undertakings other than those expressly set forth herein or in the documents delivered concurrently herewith. This Agreement may be amended only by a written instrument duly executed by a majority-in-interest of the Holdings Stockholders and a majority-in-interest of the Chase Stockholders.

Section 12. Descriptive Headings. The descriptive headings of the several sections and paragraphs of this Agreement are inserted for reference only and shall not limit or otherwise affect the meaning hereof.

Section 13. Notices. All communications provided for hereunder shall be personally delivered or sent by facsimile, registered or certified mail, return receipt requested, or reputable overnight courier service (providing next business day service) and (a) if addressed to a Holdings Stockholder or a Chase Stockholder, to the address set forth opposite such stockholders’ name on the counterpart signature page to this Agreement or such other address specified in writing by such stockholder, or (b) if addressed to the Company, at 550 West Texas Avenue, Suite 1300, Midland, Texas 79701, Attn: President, Facsimile: (432) 683-7441, or at such other address, or to the attention of such other officer, as the Company shall have furnished to the Holdings Stockholders or the Chase Stockholders at the time outstanding; provided, however, that any such communication to the Company may also, at the option of any Holdings Stockholder or Chase Stockholder, be either delivered to the Company at its address set forth above or to any officer of the Company.

Section 14. Governing Law. THIS AGREEMENT SHALL BE CONSTRUED AND ENFORCED IN ACCORDANCE WITH, AND THE RIGHTS OF THE PARTIES SHALL BE GOVERNED BY, THE LAWS OF THE STATE OF DELAWARE WITHOUT REGARD TO PRINCIPLES OF CONFLICTS OF LAWS.

Section 15. Waiver. Any waiver by any party of a breach of any provision of this Agreement shall not operate as or be construed to be a waiver of any other breach of such provision or of any breach of any other provision of this Agreement. The failure of a Holdings Stockholder or a Chase Stockholder to insist upon strict adherence to any term of this Agreement

on one or more occasions shall not be considered a waiver or deprive that party of the right thereafter to insist upon strict adherence to that term or any other term of this Agreement.

Section 16. Challenges to Agreement. In the event that any part of this Agreement or any transaction contemplated hereby is temporarily, preliminarily or permanently enjoined or restrained by court of competent jurisdiction, each of the Holdings Stockholders and each of the Chase Stockholders shall use their reasonable best efforts to cause any such injunction or restraining order to be vacated or dissolved or otherwise declared or determined to be of no further force or effect.

Section 17. Specific Performance. Each of the Holdings Stockholders and each of the Chase Stockholders acknowledges and agrees that irreparable harm would occur if any provision of this Agreement were not performed in accordance with the terms thereof, or were otherwise breached, and that such harm could not be remedied by an award of damages. Accordingly, each of the Holdings Stockholders and each of the Chase Stockholders agrees that any non-breaching party shall be entitled to an injunction to prevent breaches of this Agreement and to enforce specifically the terms and provisions hereof.

Section 18. Counterparts. This Agreement may be executed simultaneously in any number of counterparts, each of which shall be deemed an original, but all such counterparts shall together constitute one and the same instrument.

[SIGNATURE PAGES FOLLOW]

Exhibit 5.6 (d)

BUSINESS OPPORTUNITIES AGREEMENT

This BUSINESS OPPORTUNITIES AGREEMENT (this “Agreement”), dated as of February 27, 2006, and is entered into by and among Concho Resources Inc., a Delaware corporation (the “Company”), the parties to this Agreement listed on Exhibit A hereto (each a “Designated Party” and collectively the “Designated Parties”).

RECITALS

A. This Agreement is being executed and delivered pursuant to that certain Combination Agreement, dated February 24, 2006 (the “Combination Agreement”) by and among the Company, certain of the Designated Parties and the other parties thereto, pursuant to which Concho Equity Holdings Corp., a Delaware corporation, will become a subsidiary of the Company, and the Company will acquire certain oil and gas exploration and production assets located in Southeast New Mexico (the “Combination”).

B. The Company believes that it and its stockholders (the “Stockholders”) will benefit from the Combination and that the Combination is in its best interest and in the best interest of the Stockholders. The Designated Parties to be a party thereto, however, are unwilling to enter into the Combination Agreement unless the Company enters into this Agreement because each of the Designated Parties engages, directly or indirectly, in the E&P Business. The businesses in which the Designated Parties engage are similar to those in which the Company will engage following the Combination.

C. In recognition that certain Designated Parties may engage, directly or indirectly, in the same or similar activities or lines of business and have an interest in the same or similar areas of business, and in recognition of the benefits to be derived by the Company through its continued contractual, corporate and business relations with each Designated Party (including services of employees, officers and directors of each Designated Party as directors and officers of the Company), this Agreement is set forth to regulate and define the conduct of certain affairs of the Company as they may involve each Designated Party, and as applicable, its employees, officers and directors, and the powers, rights, duties, liabilities, interests and expectancies of the Company in connection therewith.

D. The law relating to duties that certain Designated Parties may owe to the Company is not clear. The application of such law to particular circumstances is often difficult to predict, and, if a court were to hold that any Designated Party breached any such duty, such Designated Party could be held liable for damages in a legal action brought on behalf of the Company.

E. In order to induce the Designated Parties to enter into the Combination Agreement or serve as directors of the Company, as applicable, the Company is willing to enter into this Agreement, pursuant to Section 122 of the General Corporation Law of the State of Delaware, in order to renounce, effective upon the consummation of the Combination, any interest or expectancy it may have in the classes or categories of business opportunities specified herein that are presented to or identified by any Designated Party, as more fully described herein. As a result of this Agreement, each Designated Party, as applicable, may continue to conduct his or its business and to pursue certain business opportunities without an obligation to offer such opportunities to the Company or any of its Subsidiaries, and any Designated Party, as applicable,

may continue to discharge his responsibilities as a director or employee of such Designated Party or any company in which such Designated Party has an interest.

NOW, THEREFORE, in consideration of the foregoing, the mutual covenants, rights, and obligations set forth in this Agreement, and the benefits to be derived herefrom, and other good and valuable consideration, the receipt and the sufficiency of which each of the undersigned acknowledges and confesses, the undersigned agree as follows:

1. Renouncement of Business Opportunities. The Company hereby renounces any interest or expectancy in any business opportunity, transaction or other matter in which any Designated Party participates or desires or seeks to participate in and that involves any aspect of the E&P Business (each, a “Business Opportunity”) other than a Business Opportunity that (i) is first presented to a Designated Party solely in such person’s capacity as a director or officer of the Company or its Subsidiaries and with respect to which, at the time off such presentment, no other Designated Party (other than a Nominee) has independently received notice or otherwise identified such Business Opportunity or (ii) is identified by a Designated Party solely through the disclosure of information by or on behalf of the Company (each Business Opportunity other than those referred to in clauses (i) or (ii) are referred to as a “Renounced Business Opportunity”). No Designated Party, including any Nominee, shall have any obligation to communicate or offer any Renounced Business Opportunity to the Company, and any Designated Party may pursue a Renounced Business Opportunity, provided that such Renounced Business Opportunity is conducted by such Designated Party in accordance with the standard set forth in Section 2. The Company shall not be prohibited from pursuing any Business Opportunity with respect to which it has renounced any interest or expectancy as a result of this Section 1. Nothing in this Section 1 shall be construed to allow any director to usurp a Business Opportunity of the Company or its Subsidiaries solely for his or her personal benefit.

2. Standards for Separate Conduct of Renounced Business Opportunities. In the event that a Designated Party acquires knowledge of a Renounced Business Opportunity, such Designated Party may pursue such Renounced Business Opportunity if such Renounced Business Opportunity is developed and pursued solely through the use of personnel and assets of the Designated Party (including, as applicable, such Designated Party in his capacity as a director, officer, employee or agent of the Designated Party).

3. Liability. Provided a Renounced Business Opportunity is conducted by a Designated Party in accordance with the standards set forth in Section 2 hereof, no Designated Party shall be liable to the Company or a Stockholder for breach of any fiduciary or other duty by reason of such Renounced Business Opportunity. In addition, no Designated Party shall be liable to the Company or a Stockholder for breach of any fiduciary duty as a director or controlling Stockholder, as applicable, by reason of the fact that such Designated Party conducts, pursues or acquires such Renounced Business Opportunity for itself, directs such Renounced Business Opportunity to another Person or does not communicate information regarding such Renounced Business Opportunity to the Company.

4. Disclosing Conflicts of Interest. Should any director of the Company have actual knowledge that he or his Affiliates is pursuing a Renounced Business Opportunity also pursued by the Company, he shall disclose to the Company’s board of directors that he may have a

conflict of interest, so that the board of directors may consider his withdrawal from discussions in board deliberations, as appropriate.

5. Interpretation

(a) For purposes of this Agreement, “Designated Parties” shall include all Subsidiaries and Affiliates of each Designated Party (other than the Company and its Subsidiaries).

(b) As used in this Agreement, the following definitions shall apply:

(i) “Affiliate” means with respect to a specified person, a person that directly, or indirectly through one or more intermediaries, controls, or is controlled by, or is under common control with, the person specified, and any directors, officers, partners or 5% or more owners of such person.

(ii) “E&P Business” means the oil and gas exploration, exploitation, development and production business and includes without limitation (a) the ownership of oil and gas property interests (including working interests, mineral fee interests and royalty and overriding royalty interests), (b) the ownership and operation of real and personal property used or useful in connection with exploration for Hydrocarbons, development of Hydrocarbon reserves upon discovery thereof and production of Hydrocarbons from wells located on oil and gas properties and (c) debt of or equity interests in corporations, partnerships or other entities engaged in the exploration for Hydrocarbons, the development of Hydrocarbon reserves and the production and sale of Hydrocarbons.

(iii) “Nominee” means any officer, director, employee or other agent of any Designated Party who serves as a director (including Chairman of the Board) or officer of the Company or its Subsidiaries.

(iv) “Hydrocarbons” means oil, gas or other liquid or gaseous hydrocarbons or other minerals produced from oil and gas wells.

(v) “Person” means an individual, corporation, partnership, limited liability company, trust, joint venture, unincorporated organization or other legal or business entity.

(vi) “Subsidiary” or “Subsidiaries” shall mean, with respect to any Person, any other Person the majority of the voting securities of which are owned, directly or indirectly, by such first Person.

6. Miscellaneous.

(a) The provisions of this Agreement shall terminate and be of no further force and effect at such time as no Designated Party serves as a director (including Chairman of the Board) or officer of the Company or its Subsidiaries.

Exhibit 5.6 (e)

CONTRACT OPERATOR AGREEMENT

This CONTRACT OPERATOR AGREEMENT (the “Agreement”), dated February 24, 2006, between COG Operating LLC, a Delaware limited liability company (“COG”), acting for itself and COG Oil & Gas LP, a Texas limited partnership (“COG LP”), each with a mailing address of 550 W. Texas Avenue, Suite 1300, Midland, Texas 79701, (COG and COG LP, collectively herein, “Owner”), and Mack Energy Corporation, a New Mexico corporation, with a mailing address of P.O. Box 960, Artesia, New Mexico 88211, (“Contract Operator”).

WHEREAS, COG shall be the operator of record of certain operated oil and gas properties described in Exhibit A attached hereto (the “Properties” or “Contract Area”) to be conveyed to it by Chase Oil Corporation, Casa Energy LLC, and other working interest owners pursuant to the Combination Agreement dated February 24, 2006;

WHEREAS, Contract Operator is actively engaged in and has extensive experience in the business of operating oil and gas properties and Owner desires to engage Contract Operator to provide certain contracted services with respect to the operation of the Properties;

NOW, THEREFORE, IN CONSIDERATION of the mutual covenants contained in this agreement, the parties agree as follows:

1. Operations To Be Performed. If and to the extent that Owner operates any of the Properties pursuant to an existing operating agreement or other agreement (“Existing Operating Agreement”) relating to the operation or management of any of the Properties, Contract Operator shall perform all the duties and obligations of Owner in its capacity as operator of record under such Existing Operating Agreements for Owner as such operator and the services set forth herein in compliance with the terms of the Existing Operating Agreement, except for those duties that this Agreement expressly provides the Owner shall continue to perform in its capacity as

operator of record, including without limitation, those set forth in Section 6 (a). If any Existing Operating Agreement imposes obligations on the Owner that are different from those contained in this Agreement, Contract Operator shall be obligated to perform in accordance with whichever agreement imposes the greater obligations on an operator without breaching such Existing Operating Agreement. Contract Operator shall perform all operations, duties and activities of an operator necessary and customary in the oil and gas industry in operating the wells currently located and hereafter drilled upon the Properties including, without limitation, the following:

	(a)		Obtain any and all licenses, registrations, permits, and approvals required to act as the contract operator for Owner; provided that any drilling permits will be obtained by Contract Operator in the name of Owner.

	(b)		Manage and oversee the day-to-day operation of each of the Properties, including, without limitation, operation and management of existing wells (including pumping services), structures, equipment and facilities associated with each Property. Contract Operator shall give prior notice to and obtain consent from Owner for any individual operation or service that Contract Operator reasonably expects will cost in excess of $75,000.00, except that such prior notice shall not be required for emergency operations necessary for the protection of the public safety and health or the environment. Contract Operator shall promptly report any such emergency operations to Owner and other interest owners subject to the terms of any Existing Operating Agreement.

	(c)		Conduct drilling, testing, fracture stimulation, completion, abandonment, site restoration, recompletion and repair operations pursuant to Sections 2 and 3 of this Agreement.

	(d)		Supervise subcontractors, suppliers, vendors and any other contract personnel as required to perform and fully satisfy its obligations under this Agreement.

	(e)		Monitor production from the Properties and, upon request by Owner, prepare and submit any forms or reports as required by Owner or any applicable federal, state, or local regulatory agency.

	(f)		Upon request by Owner, prepare all necessary tax forms and returns as required by any applicable federal, state or local regulatory agency, including conservation, severance and ad valorem tax returns. These forms and returns shall be promptly submitted to Owner for payment and filing.

	(g)		Review and comply with all Existing Operating Agreements, and, upon Owner’s request, perform all administrative duties thereunder, including the preparation

on behalf of Owner of AFEs as required by the Existing Operating Agreements and delivery of such AFEs to Owner for approval and submission to other owners.

	(h)		Upon Owner’s request, maintain and physically store any necessary files, including well files, production files, lease files, and vendor files.

	(i)		Upon Owner’s request, continuously monitor production and expense histories of the Properties and make timely and appropriate recommendations to Owner to enhance revenue, reduce costs, increase production from producing wells and/or abandon certain Properties.

	(j)		Comply with any and all federal, state and local laws, rules and regulations (“Laws”) applicable to the Properties. In the event of noncompliance with the Laws, immediately notify Owner and, in consultation with Owner, take whatever steps reasonably necessary to bring the subject Property into compliance.

	(k)		Perform any other reasonable services requested by Owner with respect to the operation, management and administration of the Properties.

2. Operations – Above the Top of the Pennsylvanian Age Formations. Contract Operator shall conduct drilling operations on the Properties drilled or proposed to be drilled to a depth above the top of the Pennsylvanian Age Formations, as follows:

	(a)		Owner shall retain and contract with drilling contractors and any other third-party contractors, including any of Contract Operator’s Affiliates, which provide labor, materials, or services in connection with Contract Operator’s performance hereunder. Contract Operator may make recommendations to Owner regarding specific third-party service providers and vendors, including Contract Operator’s Affiliates, but Owner shall have sole authority to retain service providers and vendors; provided, however, that due consideration shall be given Contract Operator’s Affiliates if their costs for services or materials are equal to or less than the costs for such services or materials offered by other service providers and vendors. Third-party invoices for activities hereunder shall be submitted to Owner c/o Contract Operator at the address specified in Section 9 of this Agreement.

	(b)		In consultation with Owner, Contract Operator shall determine the sequence in which the wells proposed on the Quarterly Development Plan are drilled, fraced, completed, and/or reworked. Owner shall initiate the staking of each proposed well location to be prepared and drilled hereunder, and Contract Operator shall provide well site supervision and administration in the staking of each such well and the preparation of the well site for drilling operations.

	(c)		Contract Operator shall follow Owner’s designated procedures for drilling, recompleting, reworking, testing, plugging and abandoning and otherwise

operating wells and shall supervise all operations. Contract Operator shall have direct contact with drilling contractor(s) during drilling operations, and shall provide related reports and information to Owner as requested, including, but not limited to, daily drilling reports, completion reports, and all information related to formation evaluation.

	(d)		Upon reaching the objective depth, Contract Operator shall recommend to Owner whether to complete or plug and abandon the well or to conduct additional drilling or testing. Owner has sole authority to decide whether to complete or plug and abandon the well or to conduct additional drilling or testing.

	(e)		Contract Operator shall provide drilling and completion supervisors for the drilling and completion of wells and other personnel, labor, and equipment (including pulling rigs) necessary to complete, equip, and connect wells for production. All drilling operations shall be conducted on a competitive contract basis at the usual rates prevailing in the area of the Properties. Contract Operator may employ its own tools and equipment in the drilling of wells, but its charges therefore shall not exceed the prevailing rates in the area and such work shall be performed by Contract Operator under the same terms and conditions as are customary and usual in the area of the Properties in contracts of independent contractors who are doing work of a similar nature.

	(f)		All drilling operations and other operations, supplies or materials provided by Contract Operator or its Affiliates or related parties shall be performed or supplied at prevailing market rates in the area of the Properties and in accordance with customs and standards prevailing in the industry; provided, however, that all costs therefor shall in no event exceed those charged by or among Contract Operator and its Affiliates.

	(g)		Contract Operator shall permit Owner, or its duly authorized representative, full and free access at all reasonable times to all operations of every kind and character being conducted in the Contract Area. IF OWNER EXERCISES RIGHTS OF ACCESS UNDER THIS SECTION 2(g) THEN (a) SUCH ACCESS SHALL BE AT OWNER’S SOLE RISK, COST AND EXPENSE AND OWNER WAIVES AND RELEASES ALL CLAIMS AGAINST CONTRACT OPERATOR (AND ITS AFFILIATES AND THE RESPECTIVE DIRECTORS, OFFICERS, EMPLOYEES, ATTORNEYS, CONTRACTORS AND AGENTS OF SUCH PARTIES) FOR INJURY OR DAMAGE TO OWNER OR ITS EMPLOYEES, REPRESENTATIVES AND CONTRACTORS OR ITS OR THEIR PROPERTY ATTRIBUTABLE TO OWNER’S OR SUCH PERSONS’ ACTIVITIES WHILE PRESENT DURING ANY SUCH OPERATION AND (b) OWNER SHALL INDEMNIFY, DEFEND AND HOLD HARMLESS CONTRACT OPERATOR (AND ITS AFFILIATES AND THE RESPECTIVE OFFICERS, DIRECTORS, EMPLOYEES, ATTORNEYS, CONTRACTORS AND AGENTS OF SUCH PARTIES) FROM ANY AND ALL CLAIMS, ACTIONS, CAUSES OF ACTION, LIABILITIES,

DAMAGES, LOSSES, COSTS OR EXPENSES (INCLUDING, WITHOUT LIMITATION, COURT COSTS AND ATTORNEYS FEES), OR LIENS OR ENCUMBRANCES FOR LABOR OR MATERIALS, ARISING OUT OF SUCH ACCESS AND ACTIVITIES (“OWNER ACCESS CLAIMS”), EXCEPT, IN THE CASE OF (a) OR (b), AS MAY RESULT FROM GROSS NEGLIGENCE OR WILLFUL MISCONDUCT OF CONTRACT OPERATOR (OR ITS AFFILIATES AND THE RESPECTIVE DIRECTORS, OFFICERS, EMPLOYEES, ATTORNEYS, CONTRACTORS AND AGENTS OF SUCH PARTIES). THESE COVENANTS OF INDEMNITY SHALL SURVIVE CANCELLATION, TERMINATION, OR EXPIRATION OF THIS AGREEMENT. If indemnification is sought pursuant to this Section 2(g), the indemnified party shall give written notice to the indemnifier of an event giving rise to the obligation to indemnify, describing in reasonable detail the factual basis for such claim, and shall allow indemnifier to assume and conduct the defense of the claim or action with counsel reasonably satisfactory to the indemnified party, and cooperate with indemnifier in the defense thereof; provided, however, that the omission to give such notice to the indemnifier shall not relieve the indemnifier from any liability which it may have to the indemnified party, except to the extent that the indemnifier is prejudiced by the failure to give such notice. The indemnified party shall have the right to employ separate counsel to represent the indemnified party at its sole cost.

3. Operations – Below the Top of the Pennsylvanian Age Formations. For all Properties drilled or to be drilled below the top of the Pennsylvanian Age Formations, Contract Operator shall perform all operations described in Section 2 of this Agreement, and after the well has been staked and the location and well site prepared, Owner shall assume the duties of operator for any such wells. After such well has been drilled, completed, and connected for production, Owner shall relinquish operations therefore to Contract Operator. Contract Operator will then operate such wells pursuant to the terms of this Agreement.

4. Quarterly Development Plan. Owner and Contract Operator shall meet on a quarterly basis to determine a development plan for the following quarter of wells to be drilled, reworked, recompleted, plugged and abandoned, or subject to other operations (the “Quarterly Development Plan”); provided that (1) Contract Operator may propose to Owner any drilling, recompletion, workover, plugging and abandonment or other operation for wells not made a part

of the Quarterly Development Plan: (2) Owner, after consultation with Contract Operator, shall have the right to propose the drilling, recompletion, workover, plugging and abandonment or other operation for wells not made a part of the Quarterly Development Plan; and (3) Owner, after consultation with Contract Operator, shall have final authority concerning the content and implementation of the Quarterly Development Plan.

5. Operations – Salt Water Disposal System. Exhibit B attached hereto describes certain saltwater disposal wells (the “Disposal Wells”) and associated permits, governmental orders, surface use agreements, right-of-way agreements and other agreements (collectively, the “SWD System”) pursuant to which saltwater and other fluids are transported from the Properties and other properties not part of the Contract Area for disposal into the Disposal Wells. The SWD System is owned proportionately by Owner and Contract Operator, Chase Oil Corporation and Caza Energy LLC (collectively, “Chase”) and each of Owner and Chase has access to and use of the SWD System pursuant to the terms of that certain Salt Water Disposal System Ownership and Operating Agreement of even date. Contract Operator agrees to operate the SWD System (which is deemed a Property hereunder) on behalf of Owner and Chase pursuant to the terms of this Agreement, subject to the following:

	(a)		Contract Operator shall manage and oversee the day-to-day operation of the SWD System, including, without limitation, operation and management of the Disposal Wells and related equipment and facilities.

	(b)		Contract Operator shall segregate the costs incurred to operate, manage and maintain the SWD System from those costs incurred to operate, manage and maintain the other Properties. Contract Operator shall keep adequate records identifying how such costs are allocated to the SWD System.

	(c)		Subject to the terms of this Agreement and at the direction of Owner, Contract Operator shall conduct such operations required to drill additional disposal wells (or convert previously producing wells to disposal wells) to be connected to the SWD System or to connect additional producing wells to the SWD System, thereby expanding the SWD System.

	6.		Joint Interest Billings and Third-Party Invoices.

	(a)		Contract Operator shall not be required to prepare and collect joint interest billings, prepare and maintain division order records, pay royalties, revenues, delay rentals or shut in royalties in connection with any Property .

	(b)		Third-party invoices for services conducted on the Properties, including the drilling operations outlined in Section 2 of this Agreement, shall be addressed to Owner c/o Contract Operator at the address specified in Section 9 of this Agreement. Contract Operator shall review, make appropriate adjustments to, and code according to Owner’s accounting system all third-party invoices and inform Owner of any discrepancies or other problem with such invoices. Once coded and approved for payment, Contract Operator shall submit such invoices, together with all supporting information requested by Owner, to Owner for approval and payment. Owner shall deal directly with service providers and vendors in resolving any discrepancies, adjustments or problems with invoices.

	7.		Term.

	(a)		The initial term of this Agreement shall be a period commencing on March 1, 2006 (the “Effective Date”) and ending at noon (MT) on the last day of February, 2011 (“Initial Term”), and if not terminated as of such date or sooner, as hereafter provided, the term of this Agreement shall be automatically extended for successive periods of one (1) year each after the Initial Term until terminated as hereafter set forth. Either party shall have the unilateral right to terminate this Agreement at the expiration of the Initial Term or any extended term by giving written notice of its intention to terminate to the other party not less than sixty (60) days prior to the expiration of the Initial Term or any extended term.

	(b)		Notwithstanding anything herein to the contrary, a party shall have the right to terminate this Agreement upon and within sixty (60) days after a Change of Control of or pertaining to the other party hereto or its ultimate parent entity (“Change of Control Entity”). As used herein, “Change of Control” means:

	(1)		the liquidation, dissolution or winding up of the affairs of a Change of Control Entity, whether voluntary or involuntary;

	(2)		a sale, in one or more related transactions, of all or essentially all, of the assets of a Change of Control Entity;

	(3)		any merger, consolidation, reorganization or other transaction with or into another entity, or other transactions resulting in the equity owners of a Change of Control Entity, as of the date hereof, directly or indirectly, holding less than a majority of the voting power and control of a Change of Control Entity, other than as a result of the initial public offering of Owner’s parent company under the Securities Act of 1933; and

(4)

as to the Contract Operator, neither Mack Chase nor Robert Chase shall continue to serve as Contract Operator’s chief operating officer for the purposes of this Agreement.

	(c)		Notwithstanding anything herein to the contrary, this Agreement shall automatically terminate, with respect to each and every Property, upon the sale, exchange, foreclosure, transfer or other disposition, or upon the termination, expiration, or forfeiture, of Owner’s entire interest in such Property.

	(d)		Notwithstanding anything herein to the contrary, at any time, Owner may, in its sole discretion, suspend or terminate any operation hereunder if, in Owner’s sole judgment, a material event (as defined herein) could result from such operation, until such time as Owner, in its sole judgment, determines that Contract Operator shall resume operations of the affected Property. A material event is an event or circumstance which, in Owner’s sole judgment, could have a materially adverse effect on a Property or Owner’s business. Contract Operator will cease operations on each such suspended or terminated operation as soon as Contract Operator is able to secure the affected Property and vacate the premises with all reasonable dispatch. Owner will remain obligated to pay Contract Operator for all compensation due to Contract Operator for a suspended or terminated operation up to the point in time that Contract Operator vacates the premises.

	(e)		Notwithstanding anything herein to the contrary, the independent audit committee of Owner’s parent corporation (or other committee of independent directors designated by Owner’s parent corporation’s Board of Directors) shall periodically review this Agreement in all respects, including Contract Operator’s performance and the Owner’s costs hereunder; such periodic review shall be conducted at least once per year. Owner shall have the right to amend, modify, or terminate this Agreement pursuant to the recommendations of such committee; provided, Contract Operator shall have the right to terminate this Agreement upon notice in accordance with paragraph (a) above if it reasonably determines that any such amendment or modification is materially detrimental to it.

8. Owner Representative. For all purposes hereof, the Owner’s representative will be E. Joseph Wright. The address for all notices hereunder shall be:

COG Operating LLC
550 W. Texas Avenue, Suite 1300
Midland, Texas, 79701
Attn: E. Joseph Wright
Fax: (432) 683-7441

9. Contract Operator Representative. For purposes hereof, Contract Operator’s representative will be Robert Chase. The address for all notices hereunder shall be:

Mack Energy Corporation
P.O. Box 960
Artesia, New Mexico 88211
Attn: Robert Chase
Fax: (505) 746-9539

10. Standard of Performance. Contract Operator shall perform all its obligations under this Agreement as a reasonably prudent operator, in a good and workmanlike manner, with due diligence and dispatch, in accordance with good oil field practices, and in compliance with all applicable agreements, laws, rules, regulations and orders of governmental authorities and applicable policies and procedures of Owner. Subject to Section 13, in no event shall Contract Operator have liability as operator to Owner for losses sustained or liabilities incurred, except such losses or liabilities that result from gross negligence or willful misconduct of Contract Operator.

11. Consideration.

(a)

Amount of Payment. Owner shall pay Contract Operator for its work under this Agreement as follows; provided, however, that all charges of Contract Operator therefor shall in no event exceed those charged by or among Contract Operator and its Affiliates for the same or similar services:

	(1)		A monthly charge in the amount of the actual costs incurred by Contract Operator for routine operation of Properties, not to exceed prevailing market rates in the area of the Properties, including, without limitation, salaries, benefits, costs of vehicles (including depreciation and fuel), cell phones, payroll taxes, repairs, maintenance and other administrative costs. All such costs shall only be for services provided by Contract Operator on the Properties, shall not include any costs incurred by Contract Operator in connection with other properties operated by Contract Operator, and shall be allocated to the Properties on a basis reasonably acceptable to the Owner.

	(2)		A monthly charge at a fixed fee amount determined in advance by Owner and Contract Operator for specific administrative services performed by Contract Operator at Owner’s request on the Properties, including, without limitation, Marketing Services (as defined below), filing of production reports, and performing geologic and land services.

	(3)		A monthly charge in the amount of actual costs incurred by the Contract Operator, not to exceed prevailing market rates in the area of the Properties, for (a) reworking operations, (b) recompletion operations, (c) plugging and abandonment operations, (d) site restoration operations, and (e) drilling and completion operations, to the extent not otherwise charged hereunder.

	(4)		A monthly overhead charge for drilling operations under Sections 2 and 3 of this Agreement; prorated for the actual number of days in the drilling operation, not to exceed prevailing market rates in the area of the Properties, but initially $2,000 per well per month. Charges for drilling wells shall begin on the spud date and terminate on the date the drilling and/or completion equipment is released, whichever occurs later. No charge shall be made for suspension of drilling operations for fifteen (15) or more consecutive calendar days.

	(b)		Invoices. Contract Operator shall submit monthly invoices, with all supporting information requested by Owner, to Owner for operations performed and expenses incurred hereunder during the previous month, and Owner shall make payment to Contract Operator within thirty (30) days after receipt and approval of an invoice and acceptance of the work covered thereby.

	(c)		Records. Contract Operator shall keep full and accurate records and accounts of all its activities in connection with this Agreement, which shall include reasonable substantiation of all work or expenses incurred herewith or any property acquired hereunder. Additionally, Contract Operator shall maintain a system of internal controls sufficient to provide reasonable assurance that records of all activities are properly maintained. All records relating to this Agreement will, at all reasonable times during the term hereof, and for a period of seven (7) years following the termination hereof, be kept and available for inspection and copying by Owner or any agent designated by Owner upon at least seventy-two (72) hours prior notice and during normal business hours.

	(d)		Billing Instructions. Contract Operator’s invoices containing all pertinent information shall be submitted to or as directed by Owner’s representative named in Section 8.

	(e)		Annual Survey of Rates. Contract Operator shall perform and provide Owner an annual survey of the prevailing rates charged in the Contract Area for the types of operations conducted by Contract Operator under this Agreement.

12. Equipment Relocation. After notice to and consultation with Owner, Contract Operator may move or relocate Owner’s equipment from the Properties to other properties operated by Contract Operator, including properties not owned by Owner. Any such relocation

shall be conducted in conformity with the requirements for material transfers of the Accounting Procedure for Joint Operations included in the relevant Existing Operating Agreement. To the extent no such requirement is included in the Existing Operating Agreement or no Existing Operating Agreement is applicable to the Property, then the value of the equipment relocated should generally reflect the market value on the date of the physical transfer of the equipment. Contract Operator shall make available to Owner sufficient documentation to verify the valuation of the relocated equipment. Relocated equipment shall be priced using one of the following pricing methods; provided, however, the Contract Operator shall use consistent pricing methods, and not alternate between methods for the purpose of choosing the method most favorable to the Contract Operator for a specific relocation:

	(a)		using published prices in effect on the date of relocation as adjusted by the appropriate COPAS Historical Price Multiplier (HPM) or prices provided by the COPAS Computerized Equipment Pricing System: (i) for oil country tubulars and line pipe, the published price shall be based upon eastern mill carload base prices (Houston, Texas, for special end) adjusted as of date of movement plus transportation costs and (ii) for other equipment, the published price shall be the published list price in effect at date of movement, as listed by a supply store nearest the Properties where like equipment is normally available, or point of manufacture plus transportation costs;

	(b)		based on a price quotation from a vendor that reflects a current realistic acquisition cost;

	(c)		based on the amount paid by the Contract Operator for like equipment in the area of the Properties within the previous six (6) months from the date of physical transfer; or

	(d)		as agreed to by Owner for equipment being relocated to the Properties, and by the parties owning the equipment being relocated from the Properties.

13. Indemnification. Notwithstanding Section 10, but subject to Section 2(g), Contract Operator shall indemnify, defend and hold harmless Owner, its parent corporations, subsidiaries, Affiliates, successors and assigns, and its and their respective directors, officers,

shareholders, agents, subcontractors, representatives and employees (each, individually, an “Indemnified Party”), against and from any and all losses, claims, damages, liabilities, fines, penalties, actions, suits, expenses and/or costs (including court costs and reasonable attorneys’ fees), for or on account of injury, bodily or otherwise, to or death of persons, damage to or destruction of property belonging to Owner, other parties that own interest in the Properties, or others, arising out of, or in any way connected with (a) the presence of Contract Operator, its subcontractors, agents, servants, representatives and/or employees on the Properties; (b) Contract Operator’s performance under this Agreement; and/or (c) the breach of any provisions hereof, but shall not apply to claims (i) for damages or losses to any property relating to drilling, testing, fracing, completing, repairing or other operations or (ii) solely attributable to any operations by third parties on adjacent or contiguous properties. If indemnification is sought pursuant to this section, the Indemnified Party shall give written notice to Contract Operator of an event giving rise to the obligation to indemnify, describing in reasonable detail the factual basis for such claim, and shall allow Contract Operator to assume and conduct the defense of the claim or action with counsel reasonably satisfactory to the Indemnified Party, and cooperate with Contract Operator in the defense thereof; provided, however, that the omission to give such notice to Contract Operator shall not relieve Contract Operator from any liability which it may have to the Indemnified Party, except to the extent that Contract Operator is prejudiced by the failure to give such notice. The Indemnified Party shall have the right to employ separate counsel to represent the Indemnified Party at its sole cost. THE INDEMNITY OBLIGATION PROVIDED HEREIN SHALL APPLY REGARDLESS OF ANY CAUSE OR OF ANY NEGLIGENT ACTS OR OMISSIONS OF ANY INDEMNIFIED PARTY, EXCEPT TO THE EXTENT ARISING FROM THE GROSS NEGLIGENCE OR WILLFUL

MISCONDUCT OF ANY INDEMNIFIED PARTY. THESE COVENANTS OF INDEMNITY SHALL SURVIVE CANCELLATION, TERMINATION, OR EXPIRATION OF THIS AGREEMENT.

14. Marketing Services. Upon Owner’s prior request and subject to the constraints of applicable oil and gas leases, Existing Operating Agreements and agreements concerning the purchase, sale, processing, treatment and transportation of oil, gas and other hydrocarbons from the Properties (collectively, “Hydrocarbons”), other agreements to which all or any portion of the Properties are subject, and Owner’s applicable policies and procedures, Contract Operator agrees, subject to the limitations expressed herein, to manage the marketing of Hydrocarbons produced from or attributable to the Properties for and on behalf of Owner, such marketing to include making all arrangements for agreements that are necessary or required to gather, process, condition, market, deliver, transport or sell (or cause to be gathered, processed, conditioned, marketed, delivered, transported or sold) Hydrocarbons produced from the Properties (“Marketing Services”); provided that all Hydrocarbon sales, marketing, gathering, processing, transportation or other agreements in connection with the foregoing shall be subject to Owner’s final approval and shall be submitted to Owner for such approval and execution.

15. Insurance. Contract Operator and each subcontractor of Contract Operator shall, at all times during the progress of the operations, maintain with insurance providers reasonably acceptable to Owner: (A) Worker’s Compensation Insurance in statutory amounts, including Employer’s Excess Liability coverage in an amount in compliance with applicable law; (B) Commercial General Liability Insurance, with limits of not less than $1,000,000 per occurrence for bodily injury and property damage combined; (C) Automobile Liability Insurance in an amount not less than $1,000,000 combined single limit per occurrence; and (D) Employer’s

Liability Insurance, with limits not less than $500,000. Contract Operator shall provide Owner certificates of insurance which contain 30-day Notice of Cancellation, Material Change or Intent to Non-Renew clauses in favor of Owner. The certificate of insurance pertaining to general liability coverage shall name Owner as an additional insured. All insurance carried by Contract Operator and each subcontractor of Contract Operator shall contain endorsements stating that such party’s coverage is primary to any coverage Owner may elect to carry for its own account. Each policy shall be endorsed to provide waiver of subrogation rights in favor of Owner. In the event that an Existing Operating Agreement imposes a different insurance obligation on Contract Operator, the Contract Operator shall comply with whichever obligation imposes the greater amount of insurance coverage.

16. Liens. Contract Operator will keep the Properties free and clear of mechanic’s liens, materialmen’s liens, and other liens threatened, asserted or created by Contract Operator’s employees, agents, representatives, vendors, suppliers, and/or subcontractors arising from or relating to operations hereunder (a “Lien”); provided, however, that the foregoing shall not apply to any Liens filed or asserted against the Properties because of Owner’s failure to pay amounts due or claimed to be due to the applicable Lien claimant.

17. Independent Contractor. Contract Operator will carry out all operations and services specified in this Agreement as an independent contractor. Neither Contract Operator nor any of its agents, employees, or servants are to be considered an agent or employee of Owner in any respect.

18. General Supervision. Owner shall have no direction or control of the means, method, or manner in which the work is performed by Contract Operator but shall be interested solely in the desired results and that performance is in compliance with the provisions of this Agreement. Any provision in this Agreement which may appear to give Owner the right to direct Contract Operator as to the details of doing the work herein covered or to exercise a measure of control over the work shall be deemed to mean that Contract Operator shall follow the desires of Owner in the results of the work only.

19. Assignment and Delegation. This Agreement is personal and neither Owner nor Contract Operator may assign any rights nor delegate any duties incurred by this Agreement, or any part thereof, without the prior written consent of the other party.

20. Affiliate Defined. The term “Affiliate” shall mean for a person, another person that controls, is controlled by, or is under common control with that person. In this definition, (a) control means the ownership of one person, directly or indirectly, of more than fifty percent (50%) of the voting securities of a corporation or, for other persons, the equivalent ownership interest (such as partnership interests) and (b) “person” means an individual, corporation, partnership, trust, estate, unincorporated organization, association, or other legal entity.

21. Non-Waiver. The failure by either party to insist upon or enforce any term of this Agreement or to exercise any right herein granted shall not be construed as a waiver or relinquishment to any extent of its right to assert or rely upon such term or right on any future occasion.

22. Force Majeure. Contract Operator shall not be considered in default because of any delays in operations due to causes beyond the control and without the fault or negligence of Contract Operator, including, but not restricted to an act of God or of a public enemy, fire, flood,

epidemic quarantine restriction, area wide strike, freight embargo, unusually severe weather, or delay of Contract Operator’s subcontractors or suppliers due to such cause; provided that Contract Operator shall immediately notify Owner in writing of the causes of delay and its probable extent. In the event of a claim of force majeure by Contract Operator which continues for a period in excess of ten (10) consecutive days, Owner shall have the right to terminate this Agreement. With respect to any Properties for which there is an Existing Operating Agreement, the force majeure provisions of such Existing Operating Agreement are hereby incorporated in this Agreement and shall apply to each Property covered by such Existing Operating Agreement instead of the foregoing force majeure provision.

23. Audit. Owner shall have the right to audit the records and accounts of Contract Operator and its Affiliates upon ten (10) days prior notice to the Contract Operator.

24. Governing Law. This Agreement shall be governed, construed, and interpreted in accordance with the laws of the State of New Mexico.

25. Notices. All notices authorized or required between the parties by this Agreement shall be in writing and delivered in person or by mail, courier service or by telecopy which provides written confirmation of complete transmission, and addressed to the designated representative of the party addressed.

26. Confidentiality. Contract Operator shall keep confidential and not disclose to any third party or use for any purpose, other than in connection with, and solely to the extent necessary to, the performance of operations hereunder, any information disclosed to it by Owner or which it develops or learns in the course of performance of operations hereunder, except such confidential or non-proprietary information as (A) is disclosed to Contract Operator by third parties not in violation of any confidentiality obligation, or (B) is then or thereafter published or

Exhibit 5.6(f)

ASSIGNMENT, BILL OF SALE AND CONVEYANCE OF SALT WATER DISPOSAL FACILITIES

KNOW ALL MEN BY THESE PRESENTS:

That CHASE OIL CORPORATION, a New Mexico corporation, CAZA ENERGY LLC, a New Mexico limited liability company, MACK ENERGY CORPORATION, a New Mexico corporation, ROBERT C. CHASE and wife, DEB E. CHASE, RICHARD L. CHASE and wife, KARLA CHASE, and GERENE DIANNE CHASE CROUCH, a single woman, P.O. Box 1767, Artesia, New Mexico, 88211, hereinafter collectively referred to as “Grantor,” for and in consideration of Ten Dollars ($10.00) and other valuable consideration, the receipt of which is hereby acknowledged, do hereby assign, transfer, sell, and convey unto Grantees hereafter identified (each a “Grantee” and collectively, the “Grantees”), in the undivided percentage interest indicated opposite each of their respective names, to wit:


		Undivided Interest
Mack Energy Corporation,		10%
Chase Oil Corporation, and Caza Energy LLC, collectively, in equal shares P.O. Box 960 Artesia, New Mexico 88211

COG Oil & Gas LP		90%
550 West Texas Avenue, Suite 1300 Midland, Texas 79701

the following (the “Interests”): all of Grantor’s undivided interest in the salt water disposal wells described on Exhibit “A” attached hereto (collectively, the “Disposal Wells”), together with all water pipeline easements, rights-of-way, licenses, permits, orders and other authorizations relating to the transportation of salt water and other types of water disposed of in the Disposal Wells, including those easements, rights-of-way, permits, orders and other agreements described or referred to on Exhibit “A” hereto, and together with all water pipelines, meters, valves, measuring equipment, pumps and other fixtures and equipment relating to the Disposal Wells and the transportation of salt water and/or other types of water disposed of in the Disposal Wells.

TO HAVE AND TO HOLD the Interests, together with all and singular any other rights and appurtenances thereto in anywise belonging unto each Grantee, its respective successors and assigns forever, provided, however, that this Assignment is made without warranties of any kind or character, express or implied, or statutory, except, subject to Permitted Liens (as defined in the Agreement), Grantor specifically agrees to warrant and defend title to the Interests unto Grantees and their respective successors and assigns against every person whomsoever lawfully claiming or to claim the same or any part thereof, by, through or under Grantor, but not otherwise; provided, however, that upon any failure of such warranty, Grantee’s sole remedy shall be limited to one dollar ($1.00) in monetary damages and Grantor agrees to exercise reasonable efforts to cure any such failure, without future monetary damage, and that GRANTOR HEREBY

EXPRESSLY DISCLAIMS AND NEGATES ANY REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED, AT COMMON LAW, BY STATUTE, OR OTHERWISE RELATING TO THE CONDITION OF THE PROPERTY THAT CONSTITUTES PERSONAL PROPERTY OR FIXTURES (INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED OR EXPRESSED WARRANTY OR MERCHANTABILITY, OR FITNESS FOR A PARTICULAR PURPOSE, OR OF CONFORMITY TO MODELS OR SAMPLES OF MATERIALS). This Assignment is made with full substitution and subrogation of each Grantee, its respective successors and assigns, in and to all covenants and warranties by others heretofore given or made in respect of the Interests conveyed and transferred hereunder, whether recorded or unrecorded.

This Assignment is executed and delivered pursuant to the terms of that certain Combination Agreement (the “Agreement”) dated February 24, 2006 between Grantor and Grantee and that certain Salt Water Disposal System Ownership and Operating Agreement between COG Operating LLC, COG Oil & Gas LP, and Chase Oil Corporation, Caza Energy LLC, and Mack Energy Corporation of even date. If there is a conflict between the terms of this Assignment, and the terms of the Agreement, the terms of the Agreement shall control in all respects. Grantor and Grantees intend that the terms of the Agreement remain distinct from and not merge into the terms of this Assignment.

The provisions of this Assignment shall be binding upon all of the heirs, successors, representatives and assigns of the Grantor and Grantees.

IN WITNESS WHEREOF, this Assignment is executed on the date of the acknowledgment for Grantor, but shall be effective as of January 1, 2006 at 7:00 AM Mountain Standard Time (the “Effective Time”).


GRANTEE:		GRANTORS:

COG OIL & GAS LP		CHASE OIL CORPORATION

By:	COG Operating LLC	By:

			Robert C. Chase, President
By:

	E. Joseph Wright,	CAZA ENERGY LLC
	Vice President
		By:

			Mack C. Chase, Manager

		MACK ENERGY CORPORATION


		By:

			Robert C. Chase, Vice President



		ROBERT C. CHASE



		DEB E. CHASE

Exhibit 5.6 (g)

SALT WATER DISPOSAL SYSTEM
OWNERSHIP AND OPERATING AGREEMENT

THIS SALT WATER DISPOSAL SYSTEM OWNERSHIP AND OPERATING AGREEMENT (“Agreement”) is made and entered into by and between COG Operating LLC, a Delaware limited liability company (“COG LLC”), acting for itself and COG Oil & Gas LP, a Texas limited partnership (“COG LP”), each with a mailing address of 550 W. Texas Avenue, Suite 1300, Midland, Texas 79701, (COG LLC and COG LP, collectively herein, “COG”), and Chase Oil Corporation, a New Mexico corporation, Caza Energy LLC, a New Mexico limited liability company, and Mack Energy Corporation, a New Mexico corporation, each with a mailing address of P.O. Box 960, Artesia, New Mexico 88211 (herein collectively referred to as “Chase”).

WHEREAS, pursuant to that certain Contract Operator Agreement of even date (the “COA”), COG has engaged the services of Mack Energy Corporation (“Mack”) to operate certain oil and gas properties (the “COG Properties”) conveyed to it by Chase pursuant to the Combination Agreement dated February 24, 2006 (Mack acting in its capacity as operator under the COA is herein called “Contract Operator”);

WHEREAS, Chase is the owner of certain oil and gas properties, which are located in the area of the COG Properties, (the “Chase Properties,” together with the COG Properties, herein called the “Contract Area”);

WHEREAS, COG and Chase desire to dispose of water produced from any wells currently located or hereafter acquired or drilled in the Contract Area into the disposal wells and related facilities, permits, right-of-ways, easements, orders and other agreements described in Exhibit A attached hereto (the “SWD System”); and

WHEREAS, COG and Chase desire to make certain arrangements with respect to the ownership and operation of the SWD System.

NOW, THEREFORE, in consideration of the premises and of the mutual agreements herein contained, the parties agree as follows:

1. Operator. COG shall be operator of record of the SWD System (COG in such capacity, and its successors, if any, in such capacity being herein called “Operator”), and shall conduct and direct and have full control of all operations with respect thereto, subject to the terms of this Agreement. Operator shall conduct all such operations in accordance with industry standards but it shall have no liability to any other party for losses sustained or liabilities incurred, except as such as may result from gross negligence or willful misconduct of Operator.

2. Ownership. The SWD System shall be owned based on the each party’s percentage contribution of the total annual volume of produced water disposed of into the SWD System during the prior calendar year; the parties acknowledging that such ownership, as of January 1, 2006, shall be ninety percent (90%) to COG LP and ten percent (10%) to Chase. No later than sixty (60) days after the end of the prior calendar year, the Operator shall provide all parties with a report showing each party’s percentage contribution of total volume of produced water disposed for the prior calendar year by February 1^stof the following year (“Annual Review”).

No later than thirty (30) days after receiving the Annual Review, COG LP and Chase shall cross-convey among each other such interest in the SWD System as may be required to result in ownership of the SWD System (“Ownership Interest”) being proportionate to each party’s annual percentage contribution of total volume of produced water disposed in the SWD System for the prior one-year period.

3. Costs and Expenses. Operator shall allocate operating costs and expenses between the parties in accordance with the following:

	a)		Operating Costs. The monthly cost of operating the SWD System and disposing of produced water from the Contract Area shall be allocated based on each party’s respective Ownership Interest at the time. The parties acknowledge that they intend to own and operate the SWD System without profit to any party and that any third-party income attributable to the SWD System shall be allocated pro rata to the parties as a reduction of each parties share of costs hereunder.

	b)		Maintenance and Repair Costs. Each party shall pay its proportionate share of maintenance and repair costs associated with the SWD System based on its respective Ownership Interest, including workovers.

	c)		Expansion Costs. Costs for expanding the SWD System as a result of a Water Disposal Deficiency (as defined herein) shall be allocated pursuant to Section 5 of this Agreement.

	d)		Invoices. Within thirty (30) days after the end of each calendar quarter, Operator shall furnish Chase with an invoice for its Ownership Interest share of (i) operating costs, (ii) maintenance and repair costs, and (iii) as provided in Section 5, any agreed upon expansion costs. Chase shall remit the amount due within thirty (30) days after the receipt of the invoice.

4. Disposal Rights. Each party shall have the concurrent, unrestricted and equal right to deliver water to the SWD System. Subject to the terms and conditions of this Agreement, Operator shall accept all water produced from existing wells in the Contract Area at the point of interconnection between the SWD System and each party’s respective facilities (“Delivery Point(s)”). Should either party desire to dispose of water produced from any future wells drilled within the Contract Area (“Additional Well(s)”), and should Operator, in its sole judgment, determine that the SWD System has available capacity to receive such additional produced water (“Excess Capacity”), such additional produced water may be disposed of into the SWD System so long as such Excess Capacity exists.

5. Expansion. In the event Excess Capacity is inadequate to handle both parties disposal needs (a “Water Disposal Deficiency”), then the parties shall have the following options:

a) The parties may jointly agree to an extension, repair, expansion, addition, or enlargement of existing or new facilities to the SWD System, including the conversion of a previously producing well to a disposal well (an “Improvement”). In that event, each party shall share in the cost of constructing such Improvement in such ratio agreed to among the parties. Costs of constructing Improvements

shall include, without limitation, the costs of engineering, construction, equipment, metering, well conversion, and related permitting.

b) A party may individually propose an Improvement to the SWD System by giving the other party written notice and a good faith estimate of the cost to construct such Improvement (the “Proposing Party”). Each party shall share in the cost of constructing such Improvement in such ratio agreed to among the parties, or if such agreement cannot be obtained, then the Proposing Party shall bear the entire cost of such Improvement and be entitled to the sole and exclusive use of any increased capacity resulting from such Improvement. Any Proposing Party that constructs an Improvement shall construct it in a good and workmanlike manner and in accordance with industry standards. The Proposing Party shall defend, indemnify, and hold the non-proposing party harmless from all actions, causes of action, damages, and costs (including reasonable attorneys’ fees) arising out of any failure to construct the Improvement in accordance with such standard of performance.

Operator shall operate and maintain any Improvement constructed pursuant to this Agreement but shall have no obligation to construct any Improvement.

6. Delivery of Produced Water. Each party shall be responsible at its sole risk and cost for delivering produced water to the SWD System as well as creating the interconnection between the SWD System and its respective facilities. Operator may refuse to accept for disposal any produced water unless in its reasonable judgment such produced water (a) is of low percentage suspended solids and compatible with other produced water in the SWD System, and (b) is delivered at an adequate pressure to enter the SWD System at atmospheric pressure (but shall not exceed the SWD System’s maximum delivery pressure as determined by Operator, in its good faith judgment, from time to time, based on then current operating conditions). Operator has the right to refuse to accept produced water that has or develops conditions or contents that harms or has potential to harm the SWD System; or take other measures that in its reasonable judgment would normally be taken by a prudent facility operator under the same or similar circumstances. Notwithstanding anything to the contrary contained herein, neither party shall not be obligated to deliver a minimum volume of produced water under this Agreement. Operator is granted unrestricted use of the produced water once it enters the SWD System at the designated Delivery Point(s).

7. Measurement. Each party, at its sole cost and expense, will be responsible for the installation and maintenance of flow lines, meters, and equipment connecting the its properties to the Delivery Point(s). The parties shall agree upon a mutually agreeable method of measurement. Each party shall be solely responsible for any damage resulting from the operation of and maintenance of its flow lines and the pipelines upstream of the Delivery Point(s).

8. Interruption of Service. In the event mechanical or other difficulties are encountered which cause a temporary interruption in the normal operation of the SWD System, if Operator is prevented from disposing of produced water for any cause not within its control, or the SWD System is unable to dispose of produced water, the obligation of Operator to accept and dispose of produced water hereunder shall be suspended during the continuation of the period of

disability, without liability to Operator. Operator shall not be considered in default of this Agreement as a result of any suspension of operations due to causes beyond the control and without the fault or gross negligence or wilfull misconduct of Operator, including, but not restricted to an act of God or of a public enemy, fire, flood, epidemic quarantine restriction, area wide strike, freight embargo, unusually severe weather, or delay of Operator’s subcontractors or suppliers due to such cause.

9. Term. This agreement shall continue in force so long as any well located in the Contract Area is utilizing the SWD System, unless earlier terminated by mutual agreement of the parties. Notwithstanding the term herein expressly set forth, Operator may at any time, in its sole discretion, terminate this Agreement by giving at least thirty (30) days prior written notice to Chase if changes in the applicable laws, rules and regulations will render continued performance of this Agreement illegal. In such event, the parties shall agree to modify or amend this Agreement as necessary to ensure continued performance in compliance with any new or amended laws, rules, and regulations.

10. Audit. Each party shall have the right to audit the SWD System records and accounts of Operator upon ten (10) days prior notice to Operator. Such audit must be completed and objections made within thirty (30) days of the commencement of the audit process.

11. Assignment and Delegation. This Agreement is personal and neither party may assign any rights nor delegate any duties incurred by this Agreement, or any part thereof, without the prior written consent of the other party, except in connection with a sale or other disposition of a party’s entire interest in wells connected to the SWD System.

12. Governing Law. This Agreement shall be governed, construed, and interpreted in accordance with the laws of the State of New Mexico.

13. Notices. All notices authorized or required between the parties by this Agreement shall be in writing and delivered in person or by mail, courier service or by telecopy which provides written confirmation of complete transmission, and addressed to the designated representative of the party addressed.

14. COG Representative. For all purposes hereof, the COG’s representative will be E. Joseph Wright. The address for all notices hereunder shall be:

COG Operating LLC
550 W. Texas Avenue, Suite 1300
Midland, Texas, 79701
Attn: E. Joseph Wright
Fax: (432) 683-7441

15. Chase Representative. For all purposes hereof, the Chase’s representative will be Robert Chase. The address for all notices hereunder shall be:

Exhibit A

DISPOSAL WELLS

Aid State 14 #1: Unit 0, Section 14, T17S, R28E, Eddy County, NM

	1.		Bill of Sale between KCS Medallion Resources, Inc. to Chase Oil Corporation assigning well pad and well bore of the Aid State 14 #1 dated 07/01/1999 recorded in 354/952 Eddy County records.

	2.		Correction Bill of Sale between KCS Medallion Resources, Inc. & Chase Oil Corporation dated 07/01/1999 in 356/682 Eddy County records. (corrects legal description)

	3.		New Mexico O.C.D. Administrative Order SWD-7575 dated 10/18/1999

	4.		Surface Use Agreement between Bogle LTD. Co. & Mack Energy Corporation dated 2/14/2000 recorded in 374/1166 Eddy County records.

	5.		State of New Mexico Commissioner of Public Lands Grant of Right-Of-Way, Right-Of-Way No. 27291 dated 05/10/2000 (Big George to Aid State 14 #1)

	6.		Amendment to Surface Use Agreement between Mack Energy Corporation & Bogle LTD. Co. dated 11/14/2001 recorded in 438/536 Eddy County records.

	7.		State of New Mexico Commissioner of Public Lands Grant of Right-Of-Way Right-Of-Way Easement No. RW-29035 dated 10/15/2004 (Aid-Red Lake SWD Pipeline)

Bate Federal #3: Unit C, Section 35, T19S, R33E, Lea County, NM

	1.		Agreement between Mark Smith & Amoco Production Company granting pipeline ROW to dispose of salt water by injection dated 09/14/1972. (not recorded)

	2.		Assignment of Right-Of-Way and Surface Lease between D-Mil Production, Inc. and Mack Energy Corporation effective 08/01/1992 in 505/520 Lea County records.

	3.		Quitclaim Conveyance between D-Mil Production, Inc. and Mack Energy Corporation effective 08/11/1992 in 494/594 Lea County records.

Big George State #3: Unit C, Section 12, T17S, R28E, Eddy County, NM

	1.		New Mexico State Land Office Salt Water Disposal Easement No. SWD-199 (Prior Easement expired waiting on approval for new one)

	2.		New Mexico O.C.D. Administrative Order SWD-611 dated 11/27/1995

	3.		State of New Mexico Commissioner of Public Lands Grant of Right-Of-Way, Right-Of-Way Easement No. RW-26453 dated 03/06/1998

Brigham H #2: Unit L, Section 21, T17S, R30E, Eddy County, NM

	1.		Assignment & Bill of Sale from Enron Oil & Gas Company to Chase Oil Corporation assigning USA NM-8686 (ROW) for salt water disposal line effective 01/01/1996 not recorded.

	2.		Bureau of Land Management Decision approving ROW Assignment for ROW NM-8686

Chase 21 State: Unit M, Section 21, T17S, R29E, Eddy County, NM

	1.		New Mexico O.C.D. Administrative Order SWD-1007 dated 10/31/2005

	2.		Application for ROW dated 01/10/2006

Federal 18 #4: Unit H, Section 18, T19S, R33E, Lea County, NM

	1.		New Mexico O.C.D. Administrative Order SWD-589 dated 04/21/1995

	2.		New Mexico O.C.D. Order No. R-12112 dated 03/02/2004 approving application for salt water disposal well.

F.M. Robinson #1: Unit E, Section 27, T17S, R29E, Eddy County, NM

	1.		New Mexico O.C.D. Order No. R-8191 dated 03/26/1986 approving salt water disposal well.

	2.		New Mexico Sate Land Office Salt Water Disposal Easement No. SWD-123 dated 03/27/2001

Muskegon State 16 #1: Unit N, Section 16, T17S, R29E, Eddy County, NM

	1.		New Mexico State Land Office Salt Water Disposal Easement No. SWD-207 dated 06/19/2003

	2.		State of New Mexico Commissioner of Public Lands Grant of Right-Of-Way, Right-Of-Way Easement No. 26287 dated 08/12-1997

	3.		Bureau of Land Management Grant/Temporary Use Permit Serial No. NM NM-98307 dated 08/13/1997

New Mexico EO State #1: Unit E, Section 20, T17S, R29E, Eddy County, NM

	1.		New Mexico O.C.D. Administrative Order SWD-763 dated 11/05/2005

	2.		State of New Mexico Commissioner of Public Lands Grant of Right-Of-Way, Right-Of-Way Easement No. 27547 dated 01/30/2001

	3.		Bureau of Land Management Right-Of-Way Grant/Temporary Use Permit Serial No. NM NM-105100 dated 02/16/2001

Petrus D #6: Unit P, Section 11, T17S, R33E, Lea County, NM

New Mexico OCD Administrative Order No. SWD-340 dated 06/24/1988

Sapphire State #3: Unit E, Section 11, T23S, R36E, Lea County, NM

New Mexico OCD Administrative Order SWD-885 dated 07/22/2003

Skelly 905: Unit A, Section 14, T17S, R31E, Eddy County, NM

	1.		New Mexico O.C.D. Administrative Order SWD-1019 dated 12/29/2005

	2.		Bureau of Land Management Right-Of-Way Grant/Temporary Use Permit Serial No. NM NM-107939 dated 04/09/2002

Skelly 952:

Pronghorn #1: Unit B, Section 24, T19S, R32E, Lea County, NM

	1.		Assignment and Bill of Sale between Pronghorn SWD System, LTD., Co. to Mack Energy Corporation effective 12/02/1996 in 764/64 Lea County Records

	2.		Warranty Deed between Pronghorn SWD System, LTD., Co. to Mack Energy Corporation effective 12/02/1996 in 764/68 Lea County Records.

	3.		New Mexico O.C.D. Order No. R-3725 dated 04/16/1969

	4.		New Mexico O.C.D. Amendment Order No. R-3725-A dated 08/20/1984

	5.		Bureau of Land Management Right-Of-Way Grant/Temporary Use Permit Serial No. NM-72767 (NE) dated 08/22/1988

	6.		New Mexico State Land Office Grant of Right-Of-Way, Right-Of-Way Easement No. RW-23473 dated 11/19/1988

	7.		Bureau of Land Management Right-Of-Way Grant/Temporary Use Permit Serial No. NM-77877 (NE) dated 06/26/1989

	8.		Bureau of Land Management Right-Of-Way Grant/Temporary Use Permit Serial No. NMNM-93345 dated 10/12/1994

	9.		Bureau of Land Management Right-Of-Way Grant/Temporary Use Permit Serial No. Bureau of Land Management Right-Of-Way Grant/Temporary Use Permit Serial NMNM-96585 dated 09/19/1996

	10.		State of New Mexico Commissioner of Public Lands Grant of Right-Of-Way, Right-Of-Way Easement No. 26179 dated 05/01/1997

	11.		Bureau of Land Management Right-Of-Way Grant/Temporary Use Permit Serial No. NMNM-101322 dated 05/05/1999

	12.		State of New Mexico Commissioner of Public Lands Grant of Right-Of-Way, Right-Of-Way Easement No. 27136 dated 12/20/1999

	13.		Bureau of Land Management Right-Of-Way Grant/Temporary Use Permit Serial No. NMNM-103348 dated 01/10/2000

	14.		Bureau of Land Management Right-Of-Way Grant/Temporary Use Permit Serial No. NMNM-103428 dated 03/16/2000

	15.		State of New Mexico Commissioner of Public Lands Grant of Right-Of-Way, Right-Of-Way Easement No. RW-28603 dated 10/30/2003

	16.		Bureau of Land Management Right-Of-Way Grant/Temporary Use Permit Serial No. NMNM-110718 dated 11/07/2003


	CONCHO EQUITY HOLDINGS CORP.

	By:	/s/ Steven L. Beal
	Name:	Steven L. Beal
	Title:	President

Address for Notice:		/s/ Timothy A. Leach

550 W. Texas, Suite 1300	Timothy A. Leach
Midland, Texas 79701


Address for Notice		/s/ Steven L. Beal

550 W. Texas, Suite 1300	Steven L. Beal
Midland, Texas 79701

Address for Notice:		/s/ David W. Copeland

550 W. Texas, Suite 1300	David W. Copeland
Midland, Texas 79701

Address for Notice:		/s/ Curt F. Kamradt

550 W. Texas, Suite 1300	Curt F. Kamradt
Midland, Texas 79701

Address for Notice:		/s/ E. Joseph Wright

550 W. Texas, Suite 1300	E. Joseph Wright
Midland, Texas 79701


Address for Notice:		/s/ David M. Thomas, III

550 W. Texas, Suite 1300	David M. Thomas, III
Midland, Texas 79701


		YORKTOWN ENERGY
		PARTNERS V, L.P.


		By:	Yorktown V Company, LLC
Address for Notice:			its general partner
410 Park Avenue

19^th Floor			By:	/s/ W. Howard Keenan, Jr.

New York, NY 10022			Name:	W. Howard Keenan, Jr.

Attn:			Title:	Managing Member

Telephone:	(212) 515-2112

Telecopy:	(212) 515-2105


		YORKTOWN ENERGY PARTNERS VI, L.P.

Address for Notice:
410 Park Avenue		By:	Yorktown VI Company, LP

19^th Floor			its general partner

New York, NY 10022

Attn:

			By:	Yorktown VI Associates LLC,
Telephone:	(212) 515-2112			its general partner

Telecopy:	(212) 515-2105

				By:	/s/ W. Howard Keenan, Jr.

				Name:	W. Howard Keenan, Jr.

				Title:	Managing Member


		WACHOVIA CAPITAL
		PARTNERS 2004, LLC

Address for Notice:
301 South College Street

12^th Floor

Charlotte, NC 28211-0732		By:	/s/ A. Wellford Tabor


Attn:		Name:	A. Wellford Tabor

Telephone:	704-374-4540	Title:	Partner

Telecopy:	704-774-4709


		PPM AMERICA PRIVATE EQUITY FUND, L.P.

Address for Notice: PPM America

225 W. Wacker		By:	PPM America Capital Partners, LLC,

Suite 1200			its general partner

Chicago, IL 60606

Attn:	Champ Raju		By:	/s/ Craig Waslin

Telephone:	312-634-2577		Name:	Craig Waslin

Telecopy:	312-634-0044		Title:	Partner


		MANSEFELDT CONCHO PARTNERS

Address for Notice:




		By:	/s/ Tucker Bridwell


Attn:		Name:	Tucker Bridwell

Telephone:		Title:	Managing Partner

Telecopy:


	DIAN GRAVES OWEN FOUNDATION

Address for Notice:




	By:	/s/ Tucker Bridwell


Attn:	Name:	Tucker Bridwell

Telephone:	Title:	President

Telecopy:


	/s/ Tucker Bridwell, by POA

Address for Notice:	Joseph Edwin Canon






Attn:

Telephone:

Telecopy:


	/s/ Tucker Bridwell, by POA

Address for Notice:	Kade L. Matthews






Attn:

Telephone:

Telecopy:


	TEJON ENERGY PARTNERS, L.P.

Address for Notice:




	By:	/s/ Tucker Bridwell, by POA


Attn:	Name:	Tucker Bridwell

Telephone:	Title:	President

Telecopy:


	DODGE JONES FOUNDATION

Address for Notice:




	By:	/s/ Tucker Bridwell, by POA


Attn:	Name:	Tucker Bridwell

Telephone:	Title:	President

Telecopy:


		CONCHO RESOURCES INC.

		By:		/s/ David W. Copeland

		Name:		David W. Copeland
		Title:		Vice President


	YALE UNIVERSITY

Address for Notice:




	By:	/s/ David F. Swensen


Attn:	Name:	David F. Swensen

Telephone:	Title:	Chief Investment Officer

Telecopy:


		THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY

Address for Notice:

		By:	The Stanford Management Company




			By:	/s/ Larry S. Owen


Attn:			Name:	Larry S. Owen

Telephone:			Title:	Managing Director, Real Estate & Natural Resources

Telecopy:


		THE GENERAL MILLS GROUP TRUST

Address for Notice:

General Mills

Number One General Mills Blvd.

Minneapolis, MN 55426		By:	/s/ Daralyn Peifer


Attn:	Daralyn Peifer	Name:	Daralyn Peifer

Telephone:	763 764 3289	Title:	Secretary to the General Mills, Inc. Benefit Finance Committee

Telecopy:	763 764 7384


		THE VOLUNTARY EMPLOYEES
		BENEFICIARY ASSOCIATION TRUST
		FOR THE GENERAL MILLS AND
		BAKERY CONFECTIONERY, TOBACCO
		AND GRAIN MILLERS HEALTH AND
		WELFARE PLAN

Address for Notice:

General Mills

Number One General Mills Blvd.

Minneapolis, MN 55426		By:	/s/ Daralyn Peifer


Attn:	Daralyn Peifer	Name:	Daralyn Peifer

Telephone:	763 764 3289	Title:	Secretary to the General Mills, Inc. Benefit Finance Committee

Telecopy:	763 764 7384


		CHASE OIL CORPORATION

Address for Notice:

Post Office Box 1767

11352 Lovington Hwy		By:	/s/ Robert C. Chase

Artesia, NM 88211		Name:	Robert C. Chase, President

Attn:

Telephone:	(505) 748-1288

Telecopy:	(505) 748-9029


		CAZA ENERGY LLC

Address for Notice:

Post Office Box 1767

11352 Lovington Hwy		By:	/s/ Mack C. Chase

Artesia, NM 88211		Name:	Mack C. Chase, Manager

Attn:

Telephone:	(505) 748-1288

Telecopy:	(505) 746-2362

		/s/ Robert C. Chase

		Robert C. Chase

Address for Notice:

Post Office Box 1767

11352 Lovington Hwy

Artesia, NM 88211		/s/ Robert C. Chase

Attn:		Richard L. Chase, by Robert C. Chase, attorney-in fact

Telephone:	(505) 748-1288

Telecopy:	(505) 746-2362

		/s/ Robert C. Chase

		Gerene Dianne Chase Crouch, a single woman,
		by Robert C. Chase, attorney-in-fact

Address for Notice:

Post Office Box 1767

11352 Lovington Hwy

Artesia, NM 88211

Attn:
Telephone:	(505) 748-1288

Telecopy:	(505) 746-2362


	Shares of
	Concho Resources
WI Owner	Common Stock		Cash Amount
Robert C. Chase		4,002,890	$	23,082,513
Richard L. Chase		2,504,914	$	14,444,490
Gerene Dianne Chase Crouch		1,849,007	$	10,662,229

			$	48,189,232


Name	Consideration
Matt Brewer	$	205,679.19
Tommy Fletcher	$	26,225.40
Steve George	$	218,024,27
Luis Hernandez	$	32,356.38
Penny Hoover	$	13,248.07
Johnny King	$	125,569.77
Charles Sadler	$	69,114.29
Staci Sanders	$	179,318.04
Jerry Sherrell	$	36,393.04


Name	Consideration
Bradley D. Bartek	$	74,801.19
Mark Brewer	$	709,127.86
Jim Brown	$	645,122.66
Buckhorn Enterprises	$	3,766,250.11
Crissa Carter	$	189,830.01
Bill W. Chase	$	3,615,999.65
Ericson Trust	$	869,598.02
Charlotte Gleghorn	$	159,343.81
H. Anthony Hall	$	176,766.58
Ron Lanning	$	60,220.10


	Voting Shares		Percentage			Non-Voting Shares		Percentage			Total Shares		Percentage
Mack C. Chase Trust		75,975.92		92.710	%		0		0.000	%		75,975.92		4.636	%
Chase 2002 Trust		0.00		0.000	%		1,443,542.48		92.710	%		1,443,542.48		88.075	%
Robert C. Chase		1,991.36		2.430	%		37,835.84		2.430	%		39,827.20		2.430	%
Richard L. Chase		1,991.36		2.430	%		37,835.84		2.430	%		39,827.20		2.430	%
Gerene Dianne Chase Crouch		1,991.36		2.430	%		37,835.84		2.430	%		39,827.20		2.430	%

Total		81,950.00		100.000	%		1,557,050.00		100.000	%		1,639,000.00		100.000	%

1.		See attached Disclosure Statement Exhibit 3.1 (f).

2.		65,670 shares of Concho Holdings Common Stock and Concho Holdings Preferred stock are reserved for issuance to Ted Gawloski, Ramon Reyes, Steve Guthrie, Greg Wilkes, Erick Nelson, Renee Runkel, Amy Penland, Jan Spradlin, Keith Corbett, Gary Mackay, Russell Hall, Jay May, James Caputo, Calvin Serpas, Brent Robertson, Robert Ready, Ryan Simpson and Gayle Burleson within 20 days of the closing date under Subscription Agreements between such persons and Concho Holdings and in connection with Concho Holdings Call Notice dated February 10, 2006, or otherwise pursuant to the Stock Purchase Agreement dated August 13, 2004 between Concho Holdings and its shareholders.

3.		All shares of Concho Holdings Common Stock and Concho Holdings Preferred Stock held by employees of Concho Holdings are pledged to secure obligations to Concho Holdings under promissory notes executed by such respective employees and due Concho Holdings.

1.		COG Operating, LLC, an Affiliate of Concho Holdings, is currently contesting and appealing an order of the NMOCD (written Order 05-PE-220) to remediate certain lands located in Lea County, New Mexico, allegedly associated with its Valhalla 4 Fed. Com., well no. 1.

2.		Concho Holdings has been verbally notified by a landowner of asserted damage claims in an unspecified amount allegedly arising from drilling operations in Gaines County, Texas; Concho Holdings believes these claims are without merit.

1.		Concho Holdings is remediating lands related to the Keystone 1, Keystone 2 and Keystone 4 Wells and the Jalmat Yates Unit Wells #17 and #31, pursuant to notices received from the NMOCD.

2.		Valhalla 4 Fed. Com., well no. 1 — See disclosures under Section 3.1(h) above.

1.		Two drilling contracts, each dated November 14, 2005 and having a one year term, with Patterson/UTI Drilling Company for drilling rig services (rigs #56 and 59).

2.		See AMI provisions disclosed in Section 3.1(1).

3.		See attached Disclosure Statement Exhibit 3.1 (t).

4.		COG Operating LLC Employees Savings & Retirement Plan effective July 1, 2004. The Plan Trustees are Steven L. Beal and Curt F. Kamradt.



	By:

Facsimile:		Robert C. Chase, President


Address:	CAZA ENERGY LLC




	By:

Facsimile:		Mack C. Chase, Manager


Address:


	Robert C. Chase



Facsimile:


Address:


	Richard L. Chase, by Robert C. Chase, attorney-in-fact



Facsimile:


Address:


	Gerene Dianne Chase Crouch, a single woman, by

	Robert	C. Chase, attorney-in-fact

Facsimile:


Address:


	Bradley D. Bartek



Facsimile:


Address:


						Charlotte Cleghorn



Facsimile:


Address:


						Tony Hall



Facsimile:


Address:


						Bill W. Chase



Facsimile:


						HOLDINGS STOCKHOLDERS:

Address:

						Timothy A. Leach





Facsimile:


Address:


						Steven L. Beal





Facsimile:


Address:

						David W. Copeland





Facsimile:


Address:


						Curt F. Kamradt





Facsimile:


Address:

						E. Joseph Wright





Facsimile:


Address:


						David M. Thomas, III





Facsimile:


	CHASE STOCKHOLDERS:

Address:	CHASE OIL CORPORATION




	By:

Facsimile:		Robert C. Chase, President


Address:	CAZA ENERGY LLC





	By:

Facsimile:		Mack C. Chase, Manager


Address:


	Robert C. Chase



Facsimile:


Address:


	Deb E. Chase



Facsimile:


Address:


	Richard L. Chase, by Robert C. Chase,
	Attorney-in-Fact

Facsimile:


Address:


	Karla Chase, by Robert C. Chase, Attorney-in-Fact



Facsimile:


Address:


						Gerene Dianne Chase Crouch, a single woman, by

						Robert C. Chase, Attorney-in-Fact

Facsimile:


Address:


						Bradley B. Bartek



Facsimile:


Address:


						Charlotte Cleghorn



Facsimile:


Address:


						Tony Hall



Facsimile:


Address:


						Bill W. Chase



Facsimile:


Address:
	THE BOARD OF TRUSTEES OF THE

	LELAND STANFORD JUNIOR UNIVERSITY


	By:	The Stanford Management Company

Facsimile:

	By:

		Name:

		Title:


Address:
	THE GENERAL MILLS GROUP TRUST



	By:

Facsimile:		Name:

		Title:


Address:	THE VOLUNTARY EMPLOYEES
	BENEFICIARY ASSOCIATION TRUST FOR

	THE GENERAL MILLS AND BAKERY

	CONFECTIONERY, TOBACCO AND GRAIN

Facsimile:	MILLERS HEALTH AND WELFARE PLAN


	By:

		Name:

		Title:


YORKTOWN ENERGY
PARTNERS V, L.P.

By:	Yorktown V Company, LLC,
	its general partner

	By:

	Name:

	Title:


YORKTOWN ENERGY
PARTNERS VI, L.P.

By:	Yorktown VI Company LP,
	its general partner

	By:	Yorktown VI Associates LLC, its general partner



		Brad Bartek


		Johnny Knorr


		W. Howard Keenan, Jr.


		Tucker S. Bridwell


		A. Wellford Tabor


OWNER COG OPERATING LLC

By:
		E. Joseph Wright, Vice President – Engineering and Operations

CONTRACT OPERATOR MACK ENERGY CORPORATION

By:
		Robert C. Chase, Vice President



						RICHARD L. CHASE, by Robert C. Chase, Attorney-in-Fact



						KARLA CHASE, by Robert C. Chase, Attorney-in-Fact



						GERENE DIANNE CHASE CROUCH, a single woman, by Robert C. Chase, Attorney-in-Fact


COG OPERATING LLC

By:
		E. Joseph Wright, Vice President – Engineering and Operations

CHASE OIL CORPORATION

By:
		Robert C. Chase, President

CAZA ENERGY LLC

By:

		Mack C. Chase, Manager

MACK ENERGY CORPORATION

By:
		Robert C. Chase, Vice President

	17.		Bureau of Land Management Right-Of-Way Amendment approved No. NM-97971 dated 11/28/2003

	18.		Bureau of Land Management Right-Of-Way Amendment approved No. NM-97971 dated 01/21/2004

	19.		Bureau of Land Management Right-Of-Way Amendment approved No. NM-110718 dated 01/21/2004

	20.		Bureau of Land Management Right-Of-Way Amendment approved No. NM-97971 dated 01/28/2004

	21.		New Mexico State Highway and Transportation Department Utility Permit No. 2-12760

	22.		New Mexico State Highway and Transportation Department Utility Permit No. 2-12608

	23.		New Mexico State Highway and Transportation Department Driveway Permit No. 2-2410