10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K

(Mark One)

x ANNUAL REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For The Fiscal Year Ended December 31, 2009

or

o TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the Transition period from _______ to _______

COMMISSION FILE NUMBER 333-93399-04

REEF GLOBAL ENERGY IV, L.P.

(Exact name of registrant as specified in its charter)

Nevada	20-1654113
(State or other jurisdiction of	(I.R.S. Employer
incorporation or organization)	Identification No.)

1901 N. Central Expressway, Suite 300, Richardson, TX 75080-3610

(Address of principal executive offices including zip code)

(972)-437-6792

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:  None

Securities registered pursuant to Section 12(g) of the Act:  None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.      Yes o No x

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act.  Yes  o No x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.  Yes x  No o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§ 232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files). Yes o No o

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of registrant's knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  x

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of "large accelerated filer,” “accelerated filer" and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Large accelerated filer o Accelerated filer o Non-accelerated filer  o Smaller reporting company  x

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act)           Yes o  No x

No market currently exists for the limited and general partnership interests of the registrant.

As of March 31, 2010, the registrant had 25.028 units held by the managing general partner, and 474.972 units of limited partner interest outstanding.

Documents incorporated by reference:  None

REEF GLOBAL ENERGY IV, L.P.

ANNUAL REPORT ON FORM10-K FOR THE YEAR ENDED DECEMBER 31, 2009

TABLE OF CONTENTS

Part I
Item 1.	Business	3
Item 1A.	Risk Factors	8
Item 1B.	Unresolved Staff Comments	11
Item 2.	Properties	11
Item 3.	Legal Proceedings	13
Item 4.	Reserved	13
PART II
Item 5.	Market for Registrant’s Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	13
Item 6.	Selected Financial Data	14
Item 7.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	15
Item 7A.	Quantitative and Qualitative Disclosure About Market Risk	19
Item 8.	Financial Statements and Supplementary Data	20
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	20
Item 9A(T).	Controls and Procedures	20
Item 9B.	Other Information	21
PART III
Item 10.	Directors, Executive Officers and Corporate Governance	21
Item 11.	Executive Compensation	23
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	23
Item 13.	Certain Relationships and Related Transactions, and Director Independence	24
Item 14.	Principal Accountant Fees and Services	24
PART IV
Item 15.	Exhibits and Financial Statement Schedules	24
	Signatures

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PART I

ITEM 1. BUSINESS.

Introduction

Reef Global Energy IV, L.P. (the Partnership) is the fourth in a series of five Nevada limited partnerships comprising a program called Reef Global Energy Ventures (the Program). The Partnership was formed in the state of Nevada on November 10, 2004.  The Partnership purchased working interests in oil and gas prospects and participated in the drilling of wells on those prospects. The primary objectives of the Partnership are to generate revenue from the production of crude oil and natural gas, distribute cash to the partners, and provide tax benefits. Reef Oil & Gas Partners, L.P. (Reef) is the managing general partner of the Partnership.

During 2004 and 2005, the Partnership acquired working interests in eight developmental and five exploratory prospects located in Texas, Louisiana, and in U.S coastal waters in the Gulf of Mexico.  The Partnership participated in the drilling of 13 wells on these prospects during 2004 thru 2007. The Partnership purchased a minority non-operated working interest in these prospects.  Reef purchased additional interests in certain Partnership prospects for some of the other partnerships it manages. The additional interest purchased by Reef on nine of the Partnership prospects was large enough that Reef Exploration L.P. (RELP), an affiliate of Reef formed in 2005, currently serves as prospect operator.

During 2006, Reef agreed to pay 100% of the costs for a working interest in a developmental well in Louisiana. This well was not successful. However, in October 2007 the well was re-entered and successfully side-tracked. The well began production operations in May 2008 and remains productive as of the date of this report. Reef expended approximately $184,000 in costs related to the drilling and completion of the original well and the successful sidetrack. The Partnership expended no funds in connection with the drilling and completion of the original well and the successful sidetrack.

In this Annual Report on Form 10-K (Annual Report), we use the term “successful” to refer to wells that are drilled, tested, and either capable of or actually producing in commercial quantities. We use the term “unsuccessful” to refer to wells that do not meet one or more of these criteria.

Acquisition and Drilling of Undeveloped Prospects

The Partnership purchased working interests in eight developmental and five exploratory prospects. A "prospect" is generally defined as a contiguous oil and gas leasehold estate, or lesser interest in a leasehold estate, upon which drilling operations may be conducted. A prospect is characterized as "exploratory" or "developmental" based upon the type of well to be drilled on the prospect.  A development well is a well drilled within a proved area of an oil or gas reservoir to the depth of a stratigraphic horizon known to be productive. Generally an exploratory well is any well that is not a development well, including wells drilled to find and produce oil or gas in an unproven area, wells drilled to find a new reservoir in a field previously found to be productive of oil or gas, or wells drilled to extend a known reservoir. Thirteen wells were drilled on the prospects acquired by the Partnership.

The Partnership prospects were acquired pursuant to an arrangement in which the Partnership purchased part of the working interest. A working interest bears a specified portion of the costs of development, operation and maintenance. A working interest is subject to landowners' royalty interests and may be subject to other royalty interests payable to unaffiliated third parties. Where the Partnership acquired less than 100% of the working interest, costs were reduced proportionately.  The Partnership's limited partnership agreement (the Partnership Agreement) prohibits Reef or any of its affiliates from retaining any overriding royalty interest, that is, any royalty interest that would be paid out of the Partnership's working interest, in any working interest purchased by the Partnership. The Partnership is a non-operator working interest owner in all prospects purchased by the Partnership.

Consulting Agreements for Prospect Acquisitions

Reef entered into three agreements (the CMI Agreements) with Challenger Minerals Inc. (CMI), a subsidiary of GlobalSantaFe Corporation and a screener of oil and gas prospects in the Gulf of Mexico and North Sea regions. Under the terms of these agreements, Reef had the option to acquire working interests in prospects screened by CMI. Reef paid CMI an annual fee for the geological and geophysical services provided by CMI. The last of these agreements expired effective November 30, 2006.

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Prospects approved for acquisition by Reef under these agreements were assigned to this Partnership as well as other limited partnerships formed as part of the Program. The five partnerships formed as a part of this Program have each reimbursed to Reef a portion of the actual fees paid by Reef under these agreements during the term of the Program. The payments made were proportionate to the capital raised by each partnership. This Partnership reimbursed Reef $314,380, or 3.17% of its gross capital contributions of $9,924,916. This amount has been capitalized as geological and geophysical costs in accordance with the full cost method of accounting for oil and gas properties. There are no further amounts to be reimbursed by this Partnership under these agreements. The partnerships formed as a part of this Program did not reimburse Reef any amount in excess of the actual fees paid by Reef.

Drilling and Completion Phase of Operations

On all prospects currently operated by RELP, drilling operations were contracted to independent third party drillers, and the costs of the wells to the Partnership were determined by actual third party costs, plus monthly operator fees charged at the competitive rate for the geographical area where the wells are located.

The Partnership generally pays drilling and completion costs as incurred. Wells drilled that failed to result in the discovery of commercial quantities of crude oil or natural gas were plugged and abandoned in accordance with applicable regulations. Two of the developmental wells and four of the exploratory wells drilled by the Partnership were unsuccessful.

Production Phase of Operations

Wells capable of producing quantities of crude oil and/or natural gas in commercial quantities were completed by installing all surface equipment necessary to control the flow of production or to shut down the well, and by installing any storage facilities, gathering, or sales lines required to produce and sell the crude oil and/or natural gas production from the well. The Partnership drilled seven successful wells, of which six were developmental wells and one was an exploratory well. Of the seven successful wells drilled by the Partnership, two are productive at December 31, 2009.

The Partnership also has two additional wells that are productive at December 31, 2009, for a total of four productive wells as of December 31, 2009.  These two wells are the well for which Reef paid 100% of the costs, and a well in which the Partnership purchased a royalty interest.

The Partnership has entered into agreements with third party marketers to sell the crude oil and/or natural gas produced from successful wells on a competitive basis at the best available terms and prices.  Generally, purchase contracts for the sale of crude oil are cancelable on 30 days' notice, but purchase contracts for the sale of natural gas may have a longer term. In certain instances the Partnership, as a minority non-operated working interest owner, has elected to permit the operator of the well to enter into sales and marketing agreements with third party purchasers.

Historically, the oil and gas market has experienced significant price fluctuations. Prices are impacted by local weather, supply in the area, availability and price of competitive fuels, seasonal variations in local demand, limited transportation capacity to other regions, and the worldwide supply and demand balance for crude oil.

The Partnership has not and does not expect to engage in commodity futures trading or hedging activities, or to enter into derivative financial instrument transactions for trading or other speculative purposes. Accordingly, the Partnership is at risk for the volatility in commodity prices inherent in the oil and gas industry, and the level of commodity prices has a significant impact on the Partnership's results of operations.  See "Item 7A. — Quantitative and Qualitative Disclosure About Market Risk."

The Partnership's share of revenue from productive wells is burdened by and/or subject to royalties and overriding royalties, monthly operating charges, and other operating costs. These items of expenditure involve amounts payable solely out of, or expenses incurred solely by reason of, production operations. The Partnership deducts operating expenses from the production revenue for the corresponding period.

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Major Customers

The Partnership sells crude oil and natural gas on credit terms to refiners, pipelines, marketers, and other users of petroleum commodities. Revenues are received directly from these parties or, in certain circumstances, paid to the operator of the property who disburses to the Partnership its percentage share of the revenues. During the year ended December 31, 2009, two marketers and one operator accounted for 25.3%, 18.5%, and 54.9% of the Partnership’s crude oil and natural gas revenues, respectively. During the year ended December 31, 2008, three marketers and one operator accounted for 34.2%, 17.9%, 11.0%, and 29.7% of the Partnership’s crude oil and natural gas revenues, respectively. During the year ended December 31, 2007, four marketers and one operator accounted for 41.0%, 17.2%, 16.8%, 13.4%, and 10.7% of the Partnership’s crude oil and natural gas revenues, respectively.  Due to the competitive nature of the market for purchase of crude oil and natural gas, the Partnership does not believe that the loss of any particular purchaser would have a material adverse impact on the Partnership.

Insurance

The Partnership is a named insured under blowout, pollution, public liability and workmen's compensation insurance policies obtained by RELP. Such insurance, however, may not be sufficient to cover all liabilities.  Each unit held by general partners represents an open-ended security for unforeseen events such as blowouts, lost circulation, stuck drill pipe, etc. that may result in unanticipated additional liability materially in excess of a general partner's initial investment in the Partnership.

The Partnership is a named insured under various insurance policies and intends to maintain such policies subject to its analysis of their premium costs, coverage and other factors.  In the exercise of Reef 's fiduciary duty as managing general partner, Reef has obtained insurance on behalf of the Partnership to provide the Partnership with such coverage as Reef believes is sufficient to protect the investor partners against the foreseeable risks of drilling and production.  Reef reviewed the Partnership insurance coverage prior to commencing drilling operations and periodically evaluates the sufficiency of insurance. In no event will the Partnership maintain public liability insurance of less than two times the Partnership's capitalization.Subject to the foregoing, Reef may, in its sole discretion, increase or decrease the policy limits and types of insurance from time to time as Reef deems appropriate under the circumstances, which may vary materially.

In accordance with the Partnership Agreement of the Partnership, all general partner units held by investors were converted into limited partner units during the third quarter of 2008. At that time, Reef amended the Certificate of Limited Partnership to effectuate the conversion of the interest of the former non-Reef general partners to that of a limited partner. Non-Reef general partners will have limited liability as a limited partner for any Partnership operations conducted after their conversion date. However, non-Reef general partners that converted to limited partners continue to have unlimited liability regarding partnership activities that occurred prior to their conversion date.

Markets

The marketing of crude oil and natural gas produced by the Partnership is affected by a number of factors that are beyond the Partnership's control and whose exact effect cannot be accurately predicted.  These factors include:

• the amount of crude oil and natural gas imports;

• the availability, proximity and cost of adequate pipeline and other transportation facilities;

• the success of efforts to market competitive fuels, such as coal and nuclear energy, and the growth and/or success of alternative energy sources such as wind power;

• the effect of United States and state regulation of production, refining, transportation and sales;

• other matters affecting the availability of a ready market, such as fluctuating supply and demand; and

• general economic conditions in the United States and around the world.

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The supply and demand balance of crude oil and natural gas in world markets has caused significant variations in the prices of these products over recent years.  The North American Free Trade Agreement eliminated trade and investment barriers between the United States, Canada, and Mexico, resulting in increased foreign competition for domestic natural gas production.  New pipeline projects recently approved by, or presently pending before, FERC, as well as nondiscriminatory access requirements, could further substantially increase the availability of gas imports to certain U.S. markets.  Such imports could have an adverse effect on both the price and volume of natural gas sales from Partnership wells.

Members of the Organization of Petroleum Exporting Countries (OPEC) establish prices and production quotas for petroleum products from time to time with the intent of affecting the global supply of crude oil and reducing, increasing or maintaining certain price levels.  Reef is unable to predict what effect, if any, such actions will have on the amount of or the prices received for crude oil produced and sold from the Partnership's wells.

In several initiatives, FERC has required pipelines to develop electronic communication and to provide standardized access via the Internet to information concerning capacity and prices on a nationwide basis, so as to create a national market.  Parallel developments toward an electronic marketplace for electric power, mandated by FERC, are serving to create multi-national markets for energy products generally.  These systems will allow rapid consummation of natural gas transactions. Although this system may initially lower prices due to increased competition, it is anticipated to expand natural gas markets and to improve their reliability.

Regulation

The Partnership's operations are affected from time to time in varying degrees by domestic and foreign political developments, and by federal and state laws and regulations.

Regulation of Oil & Gas Activities.  In most areas of operations within the United States the production of crude oil and natural gas is regulated by state agencies that set allowable rates of production and otherwise control the conduct of oil and gas operations. Operators of oil and gas properties are required to have a number of permits to operate such properties, including operator permits and permits to dispose of salt water.  RELP possesses all material requisite permits required by the states and other local authorities in areas where it operates properties. States also control production through regulations that establish the spacing of wells or limit the number of days in a given month a well can produce.  In addition, under federal law, operators of oil and gas properties are required to possess certain certificates and permits such as hazardous materials certificates, which RELP has obtained.

Environmental Matters.  The Partnership's drilling and production operations are subject to environmental protection regulations established by federal, state, and local agencies that may necessitate significant capital outlays that, in turn, would materially affect the financial position and business operations of the Partnership. These regulations, enacted to protect against waste, conserve natural resources and prevent pollution, could necessitate spending funds on environmental protection measures, rather than on drilling operations. If any penalties or prohibitions were imposed on the Partnership for violating such regulations, the Partnership's operations could be adversely affected.

Climate Change Legislation and Greenhouse Gas Regulation. Studies in recent years have indicated that emissions of certain gases may be contributing to warming of the Earth’s atmosphere. Many nations have agreed to limit emissions of greenhouse gases (GHGs) pursuant to the United Nations Framework Convention on Climate Change, and the Kyoto Protocol. Methane, a primary component of natural gas, and carbon dioxide, a byproduct of the burning of crude oil, natural gas, and refined petroleum products, are considered GHGs regulated by the Kyoto Protocol. Although the United States is currently not participating in the Kyoto Protocol, several states have adopted legislation and regulations to reduce emissions of GHGs. Restrictions on emissions of methane or carbon dioxide that may be imposed in various states could adversely affect our operations and demand for crude oil and natural gas. On December 7, 2009, the Environmental Protection Agency (EPA) issued a finding that serves as the foundation under the Clean Air Act to issue rules that would result in federal GHGs regulations and emissions limits under the Clean Air Act, even without Congressional action. On September 29, 2009, the EPA also issued a GHG monitoring and reporting rule that requires certain parties, including participants in the oil and gas industry, to monitor and report their GHG emissions, including methane and carbon dioxide, to the EPA. The emissions will be published on a register to be made available on the Internet. These regulations may apply to our operations. The EPA has proposed two other rules that would regulate GHGs, one of which would regulate GHGs from stationary sources, and may affect the oil and gas exploration and production industry and the pipeline industry. The EPA’s finding, the GHG reporting rule, and the proposed rules to regulate the emissions of GHGs would result in federal regulation of carbon dioxide emissions and other GHGs, and may affect the outcome of other climate change lawsuits pending in United States federal courts in a manner unfavorable to the oil and gas industry.

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Natural Gas Transportation and Pricing.  FERC regulates the rates for interstate transportation of natural gas as well as the terms for access to natural gas pipeline capacity. Pursuant to the Wellhead Decontrol Act of 1989, however, FERC may not regulate the price of natural gas. Such deregulated gas production may be sold at market prices determined by supply and demand, Btu content, pressure, location of wells, and other factors. Reef anticipates that all of the natural gas produced by the Partnership's wells will be considered price-decontrolled gas and that the Partnership's natural gas will be sold at fair market value. However, while sales by producers of natural gas can currently be made at unregulated market prices, Congress could reenact price controls in the future.

Proposed Regulation. Various legislative proposals are being considered in Congress and in the legislatures of various states, which, if enacted, may significantly and adversely affect the petroleum and natural gas industries. Such proposals involve, among other things, the imposition of price controls on all categories of natural gas production, the imposition of land use controls, such as prohibiting drilling activities on certain federal and state lands in protected areas, as well as other measures. At the present time, it is impossible to predict what proposals, if any, will actually be enacted by Congress or the various state legislatures and what effect, if any, such proposals will have on the Partnership's operations.

Employees

The Partnership has no employees, and is managed by its managing general partner, Reef. RELP employs a staff including geologists, petroleum engineers, landmen, and accounting personnel who administer all of the Partnership’s operations. The Partnership reimburses RELP for technical and administrative services at cost.  See "Item 11 – Executive Compensation."

FORWARD-LOOKING STATEMENTS

This Annual Report contains forward-looking statements that involve risks and uncertainties.  You should exercise extreme caution with respect to all forward-looking statements made in this Annual Report.  Specifically, the following statements are forward-looking:

• statements regarding the Partnership's overall strategy for acquiring prospects, including its intent to diversify the Partnership's investments;

• statements estimating any number or specific type or size of prospects the Partnership may acquire or size of the interest the Partnership may acquire in such prospects;

• statements regarding the state of the oil and gas industry and the opportunity to profit within the oil and gas industry, competition, pricing, level of production, or the regulations that may affect the Partnership;

• statements regarding the plans and objectives of Reef for future operations, including, without limitation, the uses of Partnership funds and the size and nature of the costs the Partnership expects to incur and people and services the Partnership may employ;

• any statements using the words "anticipate," "believe," "estimate," "expect" and similar such phrases or words; and

• any statements of other than historical fact.

Reef believes that it is important to communicate its future expectations to the partners.  Forward-looking statements reflect the current view of management with respect to future events and are subject to numerous risks, uncertainties and assumptions, including, without limitation, the factors listed in ITEM 1A of this Annual Report captioned "Risk Factors." Although Reef believes that the expectations reflected in such forward-looking statements are reasonable, Reef can give no assurance that such expectations will prove to have been correct.  Should any one or more of these or other risks or uncertainties materialize or should any underlying assumptions prove incorrect, actual results are likely to vary materially from those described herein.  There can be no assurance that the projected results will occur, that these judgments or assumptions will prove correct or that unforeseen developments will not occur.

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Reef does not intend to update its forward-looking statements.  All subsequent written and oral forward-looking statements attributable to Reef or persons acting on its behalf are expressly qualified in their entirety by the applicable cautionary statements.

ITEM 1A. RISK FACTORS

Our business activities are subject to certain risks and hazards, including the risks discussed below. If any of these events should occur, it could materially and adversely affect our business, financial condition, cash flow, or results of operations. The risks below are not the only risks we face. We may experience additional risks and uncertainties not currently known to us or, as a result of developments occurring in the future, conditions that we currently deem to be immaterial may also materially and adversely affect our business, financial condition, cash flow, and results of operations. Consequently, you should not consider this list to be a complete statement of all of our potential risks or uncertainties.

There is substantial doubt about our ability to continue as a going concern.

Our independent registered public accounting firm’s opinion on our 2009, 2008, and 2007 financial statements included an explanatory paragraph indicating substantial doubt about our ability to continue as a going concern. Since its inception, the Partnership has expended its operating capital on drilling for crude oil and natural gas. The Partnership has completed drilling operations with the original capital raised by the Partnership. In addition, drilling operations have been completed on the wells for which Reef has contributed 100% of the cost. The drilling operations of the Partnership have not resulted in the discovery or exploitation of sufficient crude oil and/or natural gas reserves to recover all of the Partnership’s investment in Partnership wells. The December 31, 2009 estimate of the Partnership’s crude oil and natural gas reserves and future cash flows raises doubts about the future ability of the Partnership to generate crude oil and natural gas revenues in excess of current operating costs at current crude oil and natural gas prices.

The managing general partner is considering several options related to the Partnership, including the possible sale of marketable assets, as a result of the recurring losses, erosion of partnership equity, and lack of significant cash flows from operations.

Crude oil and natural gas prices are volatile, and fluctuate due to a number of factors outside of our control.

The financial condition, results of operations, and the carrying value of our oil and gas properties depend primarily upon the prices received for our crude oil and natural gas production. Crude oil and natural gas prices historically have been volatile and likely will continue to be volatile given current geopolitical conditions. Cash flow from operations is highly dependent upon the sales prices received from crude oil and natural gas production. The prices for crude oil and natural gas are subject to a variety of factors beyond our control. These factors include:

· the domestic and foreign supply of crude oil and natural gas; consumer demand for crude oil and natural gas, and market expectations regarding supply and demand;

· the ability of the members of  OPEC to agree to and maintain crude oil price and production controls;

· domestic government regulations and taxes;

· the price and availability of foreign exports and alternative fuel sources;

· weather conditions, including hurricanes and tropical storms in and around the Gulf of Mexico;

· political conditions in crude oil and natural gas producing regions, including the Middle East, Nigeria, and Venezuela; and

· domestic and worldwide economic conditions.

These factors and the volatility of the energy markets make it extremely difficult to predict price movements. Also, crude oil and natural gas prices do not necessarily move in tandem. Declines in crude oil and natural gas prices would not only reduce revenues and cash flow available for distributions to partners, but could reduce the amount of crude oil and natural gas that can be economically produced from successful wells drilled by the Partnership, and, therefore, have an adverse effect upon financial condition, results of operations, crude oil and natural gas reserves, and the carrying value of the Partnership’s oil and gas properties.  Approximately 69.5% of the Partnership’s estimated proved reserves at December 31, 2009 were natural gas, and, as a result, our financial results are more sensitive to fluctuations in natural gas prices.

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The Partnership, while not prohibited from engaging in commodity trading or hedging activities in an effort to reduce exposure to short-term fluctuations in the price of crude oil and natural gas, has not engaged in such activities. Accordingly, the Partnership is at risk for the volatility in crude oil and natural gas prices, and the level of commodity prices has a significant impact upon the Partnership’s results of operations.

The recent global economic downturn could have a material adverse impact on our financial position, results of operations and cash flows.

The oil and gas industry is cyclical and tends to reflect general economic conditions. The United States and other countries around the world have experienced an economic downturn which could impact the industry in 2010 and beyond. The economic downturn has had an adverse impact on demand and pricing for crude oil and natural gas. A continuation of the economic downturn could have a further negative impact on crude oil and natural gas prices. The Partnership’s operating cash flows and profitability will be significantly affected by declining crude oil and natural gas prices. Further declines in crude oil and natural gas prices may also impact the value of our crude oil and natural gas reserves, which could result in future impairment charges to reduce the carrying value of the Partnership’s oil and gas properties.

We are subject to substantial operating risks that may adversely affect the results of operations.

There are numerous hazards involved in the drilling and operation of oil and gas wells, including blowouts involving possible damages to property and third parties, bodily injuries, mechanical failures, explosions, uncontrollable flows of crude oil, natural gas or well fluids, fires, formations with abnormal pressure, pollution, releases of toxic gas and other environmental hazards and risks. The Partnership could suffer substantial losses as a result of any of these risks. The Partnership is not fully insured against all risks inherent to the oil and gas business. Uninsured liabilities would reduce the funds available to the Partnership, may result in the loss of Partnership properties and may create liability for the general partners. Although the Partnership maintains insurance coverage in amounts Reef deems appropriate, it is possible that insurance coverage may be insufficient. In that case Partnership assets may have to be sold to pay personal injury and property claims and the cost of controlling blowouts or replacing damaged equipment rather than for drilling activities.

We cannot control activities on non-operated properties.

The Partnership has limited ability to exercise influence over and control the risks associated with operations on properties not operated by RELP. The failure of an operator of our wells to adequately perform operations, an operator’s breach of the applicable agreements, or an operator’s failure to act in ways that are in our best interest could reduce our production and revenues. The success and timing of drilling and development activities on properties operated by others depends upon a number of factors outside of our control, including the operator’s

· timing and amount of capital expenditures;

· expertise and financial resources;

· inclusion of other participants in drilling wells; and

· use of technology.

In addition, the Partnership could be held liable for the joint interest obligations of other working interest owners, such as nonpayment of costs and liabilities arising from the actions of the other working interest owners. Full development of prospects may be jeopardized in the event other working interest owners cannot pay their share of drilling and completion costs.

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Crude oil and natural gas reserve data are estimates based upon assumptions that may be inaccurate and existing economic and operating conditions that may differ from future economic and operating conditions.

Securities and Exchange Commission (SEC) rules require the Partnership to present annual estimates of reserves. Reservoir engineering is a subjective process of estimating the recovery from underground accumulations of crude oil and natural gas that cannot be precisely measured, and is based upon assumptions that may vary considerably from actual results. Accordingly, reserve estimates may be subject to upward or downward adjustments. Actual production, revenues and expenditures with respect to reserves will likely vary from estimates, and such variances could be material.    

You should not assume the present value of future net cash flows referred to in this Annual Report to be the current market value of our estimated crude oil and natural gas reserves. The estimated discounted future net cash flows from our proved reserves as of December 31, 2009 are based upon the 12-month un-weighted arithmetic average of the first-day-of-the-month prices and costs in effect when the estimate is made. Actual current prices, as well as future prices and costs, may be materially higher or lower. Further, actual future net cash flows will be affected by factors such as the amount and timing of actual production, supply and demand for crude oil and natural gas, and changes in governmental regulations and tax rates.

The Partnership Agreement limits Reef's liability to each partner and the Partnership and requires the Partnership to indemnify Reef against certain losses.

Reef will have no liability to the Partnership or to any partner for any loss suffered by the Partnership, and will be indemnified by the Partnership against loss sustained by it in connection with the Partnership if:

• Reef determines in good faith that its action was in the best interest of the Partnership;

• Reef was acting on behalf of or performing services for the Partnership; and

• Reef's actions did not constitute negligence or misconduct.

The production and producing life of Partnership wells is uncertain.

Production will decline. It is not possible to predict the life and production of any well. The actual life could differ from that which is anticipated. Sufficient crude oil or natural gas may not be produced for a partner to receive a profit or even to recover his initial investment. In addition, production from the Partnership's oil and gas wells, if any, will decline over time, and does not indicate any consistent level of future production. This production decline may be rapid and irregular when compared to a well's initial production.

Extreme weather conditions may adversely affect well operations and partner distributions. 

The Partnership conducts significant operations in the coastal regions of Louisiana and Texas. This area is susceptible to extreme weather conditions, especially those associated with hurricanes. In the event of a hurricane and related storm activity, such as windstorms, storm surges, floods and tornados, Partnership operations in the region may be adversely affected. The occurrence of a hurricane or other extreme weather may harm or delay the Partnership’s operations or distribution of revenues, if any.

Our dependence on third parties for the processing and transportation of crude oil and natural gas may adversely affect the Partnership’s revenues and, consequently, the distribution of net cash flows to investor partners. 

We rely on third parties to process and transport the crude oil and natural gas produced by the Partnership’s successful wells. In the event a third party upon whom we rely is unable to provide transportation or processing services, and another third party is unavailable to provide such services, the Partnership may have to temporarily shut-in successful wells, and revenues to the Partnership and distributions to investor partners related to those wells may be delayed.

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ITEM 1B. UNRESOLVED STAFF COMMENTS

None.

ITEM 2. PROPERTIES.

Drilling Activities and Productive Wells

The Partnership focused its drilling operations in Texas, Louisiana, and in U.S. coastal waters of the Gulf of Mexico. With the available Partnership capital, the Partnership purchased interests in 13 prospects. Seven prospects were in Louisiana, five were in Texas, and one was located in the Gulf of Mexico off of the Texas coast. The Partnership also purchased a royalty interest in a field in Louisiana with three productive wells, one of which remains productive as of the date of this report. The Partnership drilled three wells in this field, of which two were unsuccessful and one was successful but has ceased production. The Partnership drilled 13 wells on its 13 prospects. Two developmental and four exploratory wells were unsuccessful. These six wells were located in Galveston County, Texas, in Jefferson, St. Charles, Plaquemines, and Acadia Parish, Louisiana, and in the Gulf of Mexico. The Partnership completed six successful developmental wells on six developmental prospects, of which one is currently productive. Five of the developmental wells have ceased production and have or will be plugged and abandoned. The current productive well is located in Nueces County, Texas. The five wells that have ceased production are located in Jefferson, Acadia, and Cameron Parish, Louisiana and Live Oak County, Texas (two wells). The Partnership also completed one successful exploratory well in Galveston County, Texas that remains productive. Drilling operations were completed during 2006 with the capital raised by the Partnership.

In August 2006, Reef agreed to pay 100% of the costs for a working interest in a developmental well in Terrebonne Parish, Louisiana. Though the initial well was unsuccessful, the well was re-entered and successfully side-tracked beginning in October 2007. The well began production operations in May 2008 and is currently productive. The costs of the original well and the successful side-track, totaling approximately $184,000, were paid by the Partnership and then reimbursed to the Partnership through additional capital contributions to the Partnership made by Reef. No Partnership funds were expended in connection with the original drilling and successful side-tracking of this well.

The Partnership has no plans to conduct additional drilling operations on any Partnership prospect and has no plans to acquire additional prospects.

Proved Crude Oil and Natural Gas Reserves

In January 2009, the SEC adopted new rules related to modernizing reserve calculation and disclosure requirements for oil and gas companies, which became effective prospectively for annual reporting periods ending on or after December 31, 2009.  In addition to expanding the definition and disclosure requirements for crude oil and natural gas reserves, the new rule changes the requirements for determining quantities of crude oil and natural gas reserves. The new rule requires disclosure of crude oil and natural gas proved reserves by significant geographic area, using the un-weighted arithmetic average of the first-day-of-the-month commodity prices over the preceding 12-month period, rather than end-of-period prices, and allows the use of reliable technologies to estimate proved crude oil and natural gas reserves, if those technologies have been demonstrated to result in reliable conclusions about reserves volumes. Reserve and related information for 2009 is presented consistent with the requirements of the new rule. The new rule does not allow prior-year reserve information to be restated, so all information related to periods prior to 2009 is presented consistent with prior SEC rules for the estimation of proved reserves. The effect of applying the new definition of reliable technology and other non-price related aspects of the updated rules did not significantly impact 2009 net proved reserve volumes.  All of the Partnership’s reserves are located in the United States.

The estimated net proved crude oil and natural gas reserves as of December 31, 2009, 2008, and 2007 are summarized below. The quantities of proved crude oil and natural gas reserves discussed in this section include only the amounts which the Partnership reasonably expects to recover in the future from known oil and gas reservoirs under the current economic and operating conditions. Proved reserves include only quantities that the Partnership expects to recover commercially using current prices, costs, existing regulatory practices, and technology. Therefore, any changes in future prices, costs, regulations, technology or other unforeseen factors could materially increase or decrease the proved reserve estimates.

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	Oil (BBL)		Gas (MCF)
Net proved reserves as of December 31, 2007		3,175		74,811
Net proved reserves as of December 31, 2008		5,781		83,173
Net proved reserves as of December 31, 2009		4,510		61,620

The standardized measure of discounted future net cash flows as of December 31, 2009 is computed by applying the 12-month average beginning-of-month price for the year, costs, and legislated tax rates and a discount factor of 10% to net proved reserves.  The standardized measure of discounted future net cash flows as of December 31, 2008 and 2007 is computed by applying year-end prices, costs, and legislated tax rates and a discount factor of 10% to net proved reserves. The standardized measure of discounted future net cash flows does not purport to present the fair value of our crude oil and natural gas reserves.

Standardized measure of discounted future net cash flows as of December 31, 2007	$	356,210
Standardized measure of discounted future net cash flows as of December 31, 2008	$	339,744
Standardized measure of discounted future net cash flows as of December 31, 2009	$	247,420

During the years ended December 31, 2009, 2008, and 2007, the Partnership recorded property impairment costs totaling $52,189, $0, and $56,256 as a result of the net capitalized costs of oil and gas properties exceeding the standardized measure of discounted future net cash flows.

Qualifications of Technical Persons and Internal Controls Over the Reserves Estimation Process

The Partnership used an independent petroleum consulting company, Forrest A. Garb & Associates, Inc. (FGA), of Dallas, Texas, to prepare its December 31, 2009 estimates of net proved crude oil and natural gas reserves.  FGA estimated reserves for all of our properties as of December 31, 2009. The technical personnel responsible for preparing the reserve estimates at FGA meet the requirements regarding qualifications, independence, objectivity, and confidentiality set forth in the Standards Pertaining to the Estimating and Auditing of Oil and Gas Reserves Information promulgated by the Society of Petroleum Engineers. FGA is an independent firm of petroleum engineers and geologists. They do not own an interest in any of our properties, and are not employed on a contingent fee basis. FGA’s report was developed utilizing state reporting records and published production data purchased from third parties, and data provided by Reef.  Their reserve summary, which contains further discussions of the reserve estimates and evaluations, as well as the qualifications of FGA’s technical personnel responsible for overseeing their estimates and evaluations, is included as Exhibit 99.1 to this Annual Report.

The Partnership used an independent petroleum engineer, Gleason Engineering, of Arlington, Texas, to prepare its December 31, 2008 and 2007 estimates of net proved crude oil and natural gas reserves.

Reef’s policies and practices regarding internal controls over the recording of reserves are structured to objectively and accurately estimate oil and gas reserve quantities and present values in compliance with SEC regulations and US GAAP.

Reef maintains a staff of petroleum engineers who work with FGA. Our accounting department accumulates historical production and pricing data and lease operating expenses for our wells, as well as the percentage interest owned by the Partnership, which is reviewed by our engineering personnel. Reserve estimates are prepared by FGA. Our engineering personnel meet regularly with FGA’s representative to review properties and discuss methods and assumptions used in the preparation of their estimates. Mr. Byron H. (Howard) Dean, Manager – Acquisitions and Divestitures of RELP, is the petroleum engineer primarily responsible for overseeing the preparation of reserve estimates by FGA. Mr. Dean is a registered petroleum engineer with over thirty years of industry experience in oil and gas operations and reservoir engineering. He is an active member of the Society of Petroleum Engineers and the Society of Petroleum Evaluation Engineers. Any significant reserve changes are approved by Mr. Dean and Mr. Michael J. Mauceli, Chief Executive Officer of RELP.

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ITEM 3. LEGAL PROCEEDINGS.

The Partnership is not, and has not been, a party to any legal proceedings.

ITEM 4. Reserved.

PART II

ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES.

As of December 31, 2009, the Partnership had one managing general partner, and 377 investor limited partners. Pursuant to the Partnership Agreement of the Partnership, all general partner units held by investor partners were converted into limited partner units during the 3rd quarter of 2008. Reef holds a total of 25.028 limited partner units and the investor partners hold 474.972 limited partner units. No established trading market exists for the units.

Cash which, in the sole judgment of the managing general partner, is not required to meet the Partnership’s obligations is distributed to the partners quarterly in accordance with the Partnership Agreement. Cash distributions are distributed 5.96% to the managing general partner (based upon the 1% interest not represented by units and the 4.96% interest represented by Partnership units) and 94.04% to investor partners

Investor limited partnership interests are transferable, subject to certain restrictions contained in the Partnership Agreement; however, no assignee of a unit in the Partnership can become a substituted partner without the written consent of both the transferor and Reef.

The Partnership did not repurchase any units in 2009, 2008, and 2007 and has not adopted a unit repurchase program.

Use of Proceeds

In connection with the Registration Statement filed on Form S-1 (No. 333-93399) and declared effective May 31, 2001, Reef filed a post-effective amendment to the Registration Statement on behalf of the Program on September 14, 2001. On January 10, 2002 Reef filed a final prospectus and commenced the offering of units in the Program. All sales of Partnership units were made through the Program's dealer-manager, Reef Securities, Inc., and a number of soliciting dealers. The Program filed a prospectus supplement describing the Partnership on September 21, 2004 and commenced offering units. Under the terms of the offering, a minimum of 50 Partnership units at a price of $20,000 per unit were required to be sold in order to form the Partnership. Upon meeting this requirement, the Partnership was formed on November 10, 2004. The Partnership offering consisted of 375 units of limited partner interest and 125 units of general partner interest. The offering period ended on December 2, 2004, at which time all 500 allowable units had been sold. Investor partners purchased 349.972 limited partner units and 125 general partner units. Reef purchased 25.028 limited partner units, equaling 5.01% of the total Partnership units sold. Total offering proceeds were $9,924,916. Reef also contributed 1% of all leasehold, drilling, and completion costs as incurred, and reimbursed the Partnership 100% of the costs of drilling an unsuccessful development well and 100% of the costs of drilling and completing a successful sidetrack to the unsuccessful developmental well in Louisiana. Reef has paid the Partnership $273,440 in connection with these obligations. Reef also retained interest income earned by the Partnership totaling $68,585 to be used during the drilling phase of operations.

All units except those purchased by Reef paid a 15% management fee to Reef to pay for Partnership organization and offering costs, including sales commissions. These costs totaled $1,424,916, leaving capital contributions of $8,842,025 available for Partnership oil and gas operations. As of December 31, 2009, the Partnership had expended $8,640,194 on property acquisitions and $112,843 on general and administrative expenses. The remainder of $88,988 has been retained for plugging and abandonment costs of productive wells. Drilling operations have been completed on the 13 prospects owned by the Partnership, and the Partnership has no plans to conduct further development operations on any Partnership prospect.

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ITEM 6. SELECTED FINANCIAL DATA.

The following table sets forth selected financial data. The selected financial data presented below has been derived from the audited financial statements of the Partnership.

	As of and For the Years Ended December 31,
	2009			2008			2007			2006			2005
Financial Data
Revenue	$	153,080		$	315,781		$	231,283		$	311,888		$	113,465
Interest income		741			762			1,155			7,175			54,820
Costs and expenses		(275,512	)		(250,388	)		(307,424	)		(3,260,326	)		(5,554,339	)
Net income ( loss)		(121,691	)		66,155			(74,986	)		(2,941,263	)		(5,386,054	)
Allocation of net income ( loss):
Managing general partner	$	(80,669	)	$	(45,797	)	$	(28,494	)	$	(161,672	)	$	(325,236	)
General partner units		—			15,302			(12,235	)		(731,514	)		(1,331,873	)
Limited partner units		(41,022	)		96,650			(34,256	)		(2,048,077	)		(3,728,945	)
Net loss per managing general partner unit		(3,223.15	)		(1,829.83	)		(1,138.48	)		(6,459.63	)		(12,994.92	)
Net income (loss) per general partner unit		—			122.41			(97.88	)		(5,852.12	)		(10,654.98	)
Net income (loss) per limited partner unit		(86.36	)		235.70			(97.88	)		(5,852.12	)		(10,654.98	)
Total assets		232,550			352,067			228,326			304,718			3,482,185
Distributions to managing general partner		1,444			7,206			2,170			12,952			11,066
Distributions to investor partners		22,806			113,794			34,280			89,298			60,534
Distributions per general partner unit		—			81.18			72.17			188.01			127.45
Distributions per limited partner unit		48.02			239.58			72.17			188.01			127.45
Distributions per managing  general partner unit		57.70			287.92			86.70			517.50			442.14
Operating Data
Annual production:
Gas (MCF)		14,000			19,016			22,447			32,636			11,019
Oil (BBL)		1,727			1,305			795			1,014			212
Average sales price:
Gas (per MCF)	$	4.43		$	9.88		$	7.77		$	7.55		$	9.20
Oil (per BBL)	$	52.76		$	97.98		$	71.45		$	64.58		$	57.28

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ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS.

The following discussion will assist you in understanding the Partnership’s financial position, liquidity, and results of operations. The information should be read in conjunction with the audited financial statements and notes to financial statements contained herein. The discussion contains historical and forward-looking information.

For a discussion of risk factors that could impact the Partnership’s financial results, please see Item 1A of this Annual Report.

Critical Accounting Policies

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires us to make estimates and assumptions that can affect the reporting of assets, liabilities, equity, revenues, and expenses. We base our estimates on historical experience and various other assumptions that are believed to be reasonable under the circumstances. Actual results may differ from these estimates under different assumptions or conditions. We are also required to select among alternative acceptable accounting policies. See Note 2 to the financial statements for a complete list of significant accounting policies.

Oil and Gas Properties

The Partnership follows the full cost method of accounting for oil and gas properties. Under this method, all direct costs and certain indirect costs associated with acquisition of properties and successful as well as unsuccessful exploration and development activities are capitalized. Depreciation, depletion, and amortization of capitalized oil and gas properties and estimated future development costs, excluding unproved properties, are based on the unit-of-production method using estimated proved reserves.  For these purposes, proved natural gas reserves are converted to equivalent barrels of crude oil at a rate of 6 Mcf to 1 Bbl.

In applying the full cost method at December 31, 2009, we perform a quarterly ceiling test on the capitalized costs of oil and gas properties, whereby the capitalized costs of oil and gas properties are limited to the sum of the estimated future net revenues from proved reserves using prices that are the 12-month un-weighted arithmetic average of the first-day-of-the-month price for crude oil and natural gas held constant and discounted at 10%, plus the lower of cost or estimated fair value of  unproved properties, if any. If capitalized costs exceed the ceiling, an impairment loss is recognized for the amount by which the capitalized costs exceed the ceiling, and is shown as a reduction of oil and gas properties and as property impairment expense on the Partnership’s statement of operations. No gain or loss is recognized upon sale or disposition of oil and gas properties, unless such a sale would significantly alter the rate of depletion and amortization. During the years ended December 31, 2009, 2008, and 2007, the Partnership recognized property impairment expense of proved properties totaling $52,189, $0, and $56,256, respectively.

The estimate of proved crude oil and natural gas reserves used to determine property impairment expense, and also utilized in the Partnership’s disclosures of supplemental information regarding oil and gas producing activities, including the standardized measure of discounted cash flows, was prepared by an independent petroleum engineer at December 31, 2009, 2008 and 2007, utilizing prices and costs as promulgated by the SEC. Reserve engineering is a subjective and inexact process of estimating underground accumulations of crude oil and natural gas that cannot be measured in an exact manner, and is based upon assumptions that may vary considerably from actual results. Accordingly, reserve estimates may be subject to upward or downward adjustments. Actual production, revenues and expenditures with respect to reserves will likely vary from estimates, and such variances could be material.

The determination of depreciation, depletion and amortization expense recognized in the financial statements is also dependent upon the estimates of proved crude oil and natural gas reserves and is computed using the units-of-production method based upon this estimate of proved reserves. During the years ended December 31, 2009, 2008, and 2007, the Partnership had depreciation, depletion, and amortization expense totaling $43,995, $59,234, and $62,949, respectively.

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Asset retirement costs and liabilities associated with future site restoration and abandonment of long-lived assets are initially measured at fair value which approximates the cost a third party would incur in performing the tasks necessary to retire such assets. The fair value is recognized in the financial statements as the present value of expected future cash expenditures for site restoration and abandonment. Subsequent to the initial measurement, the effect of the passage of time on the liability for the net asset retirement obligation (accretion expense) and the amortization of the asset retirement cost are recognized in the results of operations. During the years ended December 31, 2009, 2008, and 2007, the Partnership recognized $0, $410, and $0 of asset retirement obligations and additional capitalized cost in connection with successful wells drilled by the Partnership.

Recognition of Revenue

The Partnership has entered into sales contracts for disposition of its share of crude oil and natural gas production from productive wells. Revenue is recognized based upon the metered volumes delivered to those purchasers each month. Any significant over or under balanced gas positions are disclosed in the financial statements. As of December 31, 2009, 2008, and 2007, the Partnership had no material gas imbalance positions.

Recently Adopted Accounting Pronouncements

Modernization of Oil and Gas Reporting

In January 2009, the SEC adopted new rules related to modernizing reserve calculation and disclosure requirements for oil and gas companies, which became effective prospectively for annual reporting periods ending on or after December 31, 2009. In addition to expanding the definition and disclosure requirements for crude oil and natural gas reserves, the new rule changes the requirements for determining quantities of crude oil and natural gas reserves. The new rule also changes certain accounting requirements under the full cost method of accounting for oil and gas activities. The changes are designed to modernize the requirements for the determination of crude oil and natural gas reserves, aligning them with current practices and updating them for changes in technology. The effect of applying the un-weighted arithmetic average of the first-day-of-the-month commodity prices for the preceding 12-month period, compared to the use of end-of-period prices and costs, decreased net proved reserves by 11.1%. The standardized measure of discounted future net cash flows for the year ended December 31, 2009 was lower by $167,140 as a result of using the new rule as compared to amounts calculated using the previous rules. The effect of applying the new rule resulted in increased depletion expense of $713 but no additional impairment expense.

Accounting Standards Codification

In June 2009, the Financial Accounting Standards Board (FASB) issued guidance on the accounting standards codification and the hierarchy of generally accepted accounting principles. The accounting standards codification is intended to be the source of authoritative US GAAP and reporting standards as issued by the FASB. Its primary purpose is to improve clarity and use of existing standards by grouping authoritative literature under common topics. The accounting standards codification is effective for financial statements issued for interim and annual periods ending after September 15, 2009. The Partnership now describes the authoritative guidance used within the footnotes but no longer uses numerical references. The accounting standards codification does not change or alter existing US GAAP, and there has been no expected impact on the Company’s financial position, results of operations or cash flows.

Fair Value Measurement of Liabilities

In August 2009, the FASB issued new guidance for the accounting for the fair value measurement of liabilities.  The new guidance provides clarification that in certain circumstances in which a quoted price in an active market for the identical liability is not available, a company is required to measure fair value using one or more of the following valuation techniques: the quoted price of the identical liability when traded as an asset, the quoted prices for similar liabilities or similar liabilities when traded as assets, and/or another valuation technique that is consistent with the principles of fair value measurements.  The new guidance is effective for interim and annual periods beginning after August 27, 2009.  The Partnership does not expect that the provisions of the new guidance will have a material effect on its results of operations, financial position or liquidity.

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Subsequent Events

In May 2009, the FASB issued new guidance on accounting for subsequent events.  This guidance established general standards of accounting for and disclosure of events that occur after the balance sheet date but before financial statements are issued or are available to be issued. This guidance is effective for interim and annual reporting periods ending after June 15, 2009. The Partnership adopted the provisions of this guidance for the period ended June 30, 2009. In February 2010, the FASB issued an update to this guidance. Among other provisions, this update provides that an entity that is a SEC filer is not required to disclose the date through which subsequent events have been evaluated. The Partnership adopted the provisions on its effective date of February 24, 2010. There was no impact on the Partnership’s operating results, financial position or cash flows.

Recognition and Presentation of Other-Than-Temporary Impairments

In April 2009, the FASB issued new guidance related to the presentation and disclosure of other-than-temporary impairments on debt and equity securities.  The new guidance amends the other-than-temporary impairment guidance for debt securities to make the guidance more operational and to improve the presentation and disclosure of other-than-temporary impairments on debt and equity securities in the financial statements.  The guidance does not amend existing recognition and measurement guidance for equity securities, but does establish a new method of recognizing and reporting for debt securities.  Disclosure requirements for impaired debt and equity securities have been expanded significantly and are now required quarterly, as well as annually.  This guidance became effective for interim and annual reporting periods ending after June 15, 2009.  Comparative disclosures are required for periods ending after the initial adoption.  This guidance did not have an impact on the Partnership’s financial position, results of operations or cash flows.

Interim Reporting of Fair Value of Financial Instruments

In April 2009, the FASB issued new guidance related to the disclosure of the fair value of financial instruments.  The new guidance amends SFAS No. 107, “Disclosures about Fair Value of Financial Instruments,” to require disclosures about fair value of financial instruments for interim reporting periods.  The guidance also amends APB Opinion No. 28, “Interim Financial Reporting,” to require those disclosures about the fair value of financial instruments in summarized financial information at interim reporting periods.  This guidance is effective for reporting periods ending after June 15, 2009.  The adoption of this guidance did not have any impact on the Partnership’s results of operations, cash flows, or financial position.

Liquidity and Capital Resources

The Partnership was funded with initial capital contributions totaling $9,924,916. Investor partners purchased 125 general partner units and 349.972 limited partner units for $9,499,441. Reef purchased 25.028 units, or 5.01% of the total units sold, for $425,475. As of December 31, 2009, Reef has also contributed $273,440 in connection with its obligation to pay 1% of all leasehold, drilling, and completion costs, and to reimburse the Partnership for 100% of the drilling costs of an unsuccessful developmental well in Louisiana, and 100% of the drilling and completion costs for a successful sidetrack of this developmental well. The Partnership also retained $68,585 of interest income earned for use during the drilling phase of operations.  Organization and offering costs totaled $1,424,916, leaving capital contributions of $8,842,025 available for Partnership activities.

The Partnership Agreement does not allow the Partnership to borrow funds or issue partner assessments during the drilling phase of its operations. Therefore, the $8,842,025 was the total amount available to the Partnership for drilling and administrative costs during the drilling phase of its operations. As of December 31, 2009, drilling operations had been completed on the 13 wells drilled by the Partnership, and also on the developmental well and sidetrack to the developmental well for which Reef is reimbursing 100% of drilling and completion costs to the Partnership. The Partnership expended $8,640,194 on prospect and property acquisitions, drilling and completion costs and $112,843 on general and administrative expenses during the drilling phase of operations. The Partnership retained $88,988 for plugging and abandonment costs of productive wells.

Please see Item 1A of this Annual Report for a list of risk factors that could impact the Partnership. The Partnership distributes to investors on a quarterly basis the net cash flow from interest income and crude oil and natural gas sales revenues from successful wells, less operating, general and administrative, and other costs. These funds are not available for drilling activities.

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The Partnership Agreement allows the Partnership to borrow funds or issue assessments of up to $20,000 per unit to the investor partners for subsequent operations deemed necessary to fully develop any of the initial Partnership prospects. The Partnership has no plans for subsequent operations on any of its prospects.

The Partnership has working capital of $29,392 at December 31, 2009. Subsequent to expending the initial available Partnership capital contributions on prospect and property acquisitions and drilling and completion costs of Partnership wells, the Partnership has minimal working capital, consisting primarily of cash flow from productive properties utilized to pay cash distributions to investors.

During 2006, Reef contributed a working interest in a well to the Partnership and agreed to pay all costs associated with the drilling and equipping of the well. The well is located in Terrebonne Parish, Louisiana. The initial drilling operations were completed in May 2007 and the well was unsuccessful, however, after reviewing the well logs and other geologic data, the wellbore was re-entered during the fourth quarter of 2007 and successfully sidetracked. Sidetrack drilling operations were completed during February 2008 and the well began production operations in May 2008. A workover of an existing Partnership well that was a significant producing well during 2006 but was shut-in for most of 2007 as a result of high water volumes was performed in February 2008 in an attempt to open a new productive zone. The workover was unsuccessful, and the well was plugged and abandoned. A third partnership well was successfully re-completed in a new productive zone in June 2007, and production volumes from the well were increased.

The success of the two projects above, combined with significant increases in the average prices received for crude oil and natural gas during 2008, enabled the Partnership to operate with positive cash flow levels during 2008. During the latter half of 2008, prices began moving downward to a level which reached a low point during the first quarter of 2009. While management does not expect to see a return to the average pricing levels received during 2008, there was positive movement of prices during 2009. Sales of crude oil and natural gas from productive wells declined on an equivalent barrel of crude oil basis by approximately 10% from 2008 to 2009. The ability of the Partnership to generate positive cash flows during 2010 will primarily depend upon crude oil and natural gas pricing. The Partnership is expected to generate positive cash flows during the first quarter of 2010. The managing general partner is considering several options related to the Partnership, including the possible sale of marketable assets and dissolution of the Partnership, as a result of the recurring losses incurred over the past several years, the erosion of partnership equity, and the lack of significant cash flows from operations.

Results of Operations

Comparison of the Year Ended December 31, 2009 to the Year Ended December 31, 2008

The Partnership had a net loss of $121,691 for the year ended December 31, 2009, compared to net income of $66,155 for the year ended December 31, 2008. The decline in operating results was primarily due to the decline in average prices received for the Partnership’s crude oil and natural gas production. The average prices received for crude oil sales declined from $97.98 per barrel in 2008 to $52.76 per barrel in 2009, a decrease of 46.2%. The average price received for natural gas sales decreased from $9.88 per MCF in 2008 to $4.43 per MCF received during 2009, a decrease of 55.2%. These decreases in pricing led to an overall 51.5% decrease in sales revenues from $315,781 in 2008 to $153,080 in 2009. Crude oil sales volume increased from 1,305 barrels sold in 2008 to 1,727 barrels sold in 2009. The volume increase was the result of a full year of production from the Partnership’s final well, which began production operations in May 2008. Crude oil sales volume from this well totaled 1,197 barrels during 2009. Natural gas volumes dropped from 19,016 MCF sold in 2008 to 14,000 MCF sold in 2009. While the Partnership had natural gas sales of 6,297 MCF from the well that began production operations in May 2008, two other wells ceased production at the end of 2008, and the Partnership experienced natural production declines from other productive wells. Overall, the Partnership had an approximate 10% decline in total sales volume on an equivalent barrel of crude oil basis.

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General and administrative costs decreased from $115,784 incurred during the year ended December 31, 2008 to $109,641 incurred during the year ended December 31, 2009. Effective April 1, 2008 Reef implemented a new method for allocating overhead that takes actual overhead and allocates it based upon the summation of revenues, expenses, and actual capital costs incurred. Accordingly, the administrative overhead charge to the Partnership decreased along with revenues and expenses during the period, from $40,593 in the year ended December 31, 2008 to $20,120 for the year ended December 31, 2009.

Comparison of the Year Ended December 31, 2008 to the Year Ended December 31, 2007

The Partnership had net income of $66,155 for the year ended December 31, 2008, compared to a net loss of $74,986 for the year ended December 31, 2007. The improvement in operating results was primarily due to sales prices received for the Partnership’s crude oil and natural gas production. The average price received for crude oil sales jumped from $71.45 per barrel in 2007 to $97.98 per barrel in 2008, an increase of 37.1%. The average price received for natural gas sales increased from $7.77 per MCF in 2007 to $9.88 per MCF received during 2008, an increase of 27.2%. These increases in pricing led to an overall 36.5% increase in sales revenues from $231,283 in 2007 to $315,781 in 2008. Crude oil sales volume increased from 795 barrels sold in 2007 to 1,305 barrels sold in 2008. The volume increase was the result of the Partnership’s final well beginning production operations in May 2008. Crude oil sales volume from this well totaled 553 barrels during 2008. Natural gas volumes dropped from 22,447 MCF sold in 2007 to 19,016 MCF sold in 2008. While the Partnership had gas sales of 4,221 MCF from the well that began production operations, the Partnership lost approximately 4,500 MCF from two wells which ceased production during 2008, and experienced natural production declines from other productive wells. The Partnership had one developmental well cease production in January 2008, and had no production during 2008 from a second well which underwent an unsuccessful workover attempt in February 2008.

General and administrative costs increased during 2008 as a result of a change in method for allocating overhead to Partnerships. Reef implemented a new method for allocating overhead that takes actual overhead and allocates it based upon the summation of revenues, expenses and capital costs incurred. Under the prior method of allocating overhead, not all allocable general and administrative expenses were charged to the Partnership during 2007. The administrative overhead charge to the Partnership for the year ended December 31, 2008 was $44,370, compared to $16,802 for the year ended December 31, 2007.

The rapid decline in crude oil and natural gas prices that occurred during the fourth quarter of 2008 caused the Partnership to incur a net loss during the fourth quarter of 2008 totaling $12,066. Pricing continued to decline into the first quarter of 2009, and the Partnership also expects to incur a net loss during the first quarter of 2009.

Off-Balance Sheet Arrangements

The Partnership does not participate in transactions that generate relationships with unconsolidated entities or financial partnerships, such as entities often referred to as structure finance or special purpose entities (SPEs), which would have been established for the purpose of facilitating off-balance sheet arrangements or other contractually narrow or limited purposes. As of December 31, 2009, 2008, and 2007, the Partnership was not involved in any unconsolidated SPE transactions.

Contractual Obligations

The Partnership has no obligations under non-cancelable agreements as of December 31, 2009.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURE ABOUT MARKET RISK.

Interest Rate Risk

The Partnership has not borrowed any funds to date. The partnership agreement prohibited bank borrowings during the Partnership's drilling phase of operations. The Partnership is permitted to borrow monies or assess partners for developmental activities on the prospects it has drilled, however, at this time the Partnership has no plans to conduct additional activities on any of its existing prospects. Consequently, the Partnership is subject to interest rate risk solely to the extent that changes in interest rates affect general economic conditions.

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Commodity Price Risk

The Partnership has not and does not expect to engage in commodity futures trading or hedging activities or enter into derivative financial instrument transactions for trading or other speculative purposes.  The Partnership sells a vast majority of its production from successful oil and gas wells on a month-to-month basis at current spot market prices. Accordingly, the Partnership is at risk for the volatility in commodity prices inherent in the oil and gas industry, and the level of commodity prices has a significant impact on the Partnership's results of operations.

Assuming the production levels we attained during the year ended December 31, 2009, a 10% change in the price received for our crude oil would have had an approximate $9,100 impact on our crude oil revenues, and a 10% change in the price received for our natural gas would have resulted in an approximate $6,240 impact on our natural gas revenues.

ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA.

The reports of our independent registered public accounting firm, and the Partnership's financial statements, related notes, and supplementary data are presented beginning on page F-1.

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE.

None.

ITEM 9A(T). CONTROLS AND PROCEDURES.

Evaluation of Disclosure Controls and Procedures

As the Managing General Partner of the Partnership, Reef maintains a system of controls and procedures designed to provide reasonable assurance as to the reliability of the financial statements and other disclosures included in this report, as well as to safeguard assets from unauthorized use or disposition. The Partnership, under the supervision and with participation of its management, including the principal executive officer and principal financial officer of the Partnership’s general partner, Reef Oil & Gas Partners, L.P., evaluated the effectiveness of its “disclosure controls and procedures” as such term is defined in Rule 13a-15(e) under the Securities Act of 1934, as amended (the Exchange Act), as of the end of the period covered by this Annual Report. Based on that evaluation,  the principal executive officer and principal financial officer of our general partner have concluded that the Partnership’s disclosure controls and procedures are effective to ensure that information required to be disclosed by the Partnership in reports that it files or submits under the Exchange Act is recorded, processed, summarized, and reported within the time periods specified in Securities and Exchange Commission rules and forms, and includes controls and procedures designed to ensure that information required to be disclosed by us in such reports is accumulated and communicated to our management, including the principal executive officer and principal financial officer of our general partner, as appropriate to allow timely decisions regarding financial disclosure.

Management Report on Internal Control Over Financial Reporting

Management of the Partnership is responsible for establishing and maintaining adequate internal control over financial reporting, as such term is defined in Exchange Act Rules 13a-15(f). Our management conducted an evaluation of the effectiveness of our internal control over financial reporting based on the framework in Internal Control - Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission. Based on this evaluation under the framework in Internal Control – Integrated Framework, management of the Partnership concluded that the Partnership’s internal control over financial reporting was effective as of December 31, 2009.

This annual report does not include an attestation report of the Partnership’s registered public accounting firm regarding internal control over financial reporting. Management’s report was not subject to attestation by the Partnership’s registered public accounting firm pursuant to temporary rules of the SEC that permit the Partnership to provide only management’s report in this annual report.

20

Changes in Internal Controls

There have not been any changes in the Partnership’s internal controls over financial reporting during the fiscal quarter ended December 31, 2009 that have materially affected, or are reasonably likely to materially affect, the Partnership’s internal control over financial reporting.

ITEM 9B. OTHER INFORMATION.

None.

PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS AND CORPORATE GOVERNANCE.

The Partnership has no directors or executive officers. Its managing general partner is Reef Oil & Gas Partners, L.P.

Reef Oil & Gas Partners, L.P. and Reef Exploration, L.P.

The Manager, officers and key personnel of the managing general partner, their ages, current positions with the managing general partner and/or RELP, and certain additional information are set forth below.

On January 4, 2010, Reef SWD 2007-A, L.P., an affiliate of Reef for which Reef Oil & Gas Partners, L.P. is the managing general partner, instituted a Federal bankruptcy Chapter 11 proceeding in U.S. Bankruptcy Court, Northern District of Texas. On March 30, 2010, Reef SWD 2007-A, L.P., filed an application with the court to convert the Chapter 11 proceeding to a Chapter 7 proceeding under the U.S. Bankruptcy Code.

Name	Age	Positions and Offices Held
Michael J. Mauceli	53	Manager of Reef Oil & Gas Partners GP, LLC; Chief Executive Officer of RELP
H. Walt Dunagin	52	Executive Vice President and Land Manager of RELP
Byron H. Dean	60	Manager of Acquisitions and Divestitures of RELP
Daniel C. Sibley	58	Chief Financial Officer and General Counsel of RELP
L. Mark Price	47	Controller of RELP and Chief Financial Officer of Pure Reef, L.P.
David M. Tierney	57	Chief Financial Reporting Officer and Treasurer of RELP

Michael J. Mauceli is the Manager and a member of Reef Oil & Gas Partners, GP, LLC, which is the general partner of Reef, as well as the Chief Executive Officer of RELP. Mr. Mauceli has been the principal executive officer of Reef since its formation in February 1999. He has served in this position with RELP since January 2006 and has served in this position with its predecessor entity, OREI, Inc. (OREI), since 1987.  Mr. Mauceli attended the University of Mississippi where he majored in business management and marketing as well as the University of Houston where he received his Commercial Real Estate License. He entered the oil and natural gas business in 1976 when he joined Tenneco Oil & Gas Company.  Mr. Mauceli moved to Dallas in 1979, where he was independently employed by several exploration and development firms in planning exploration and marketing feasibility of privately sponsored drilling programs.

H. Walt Dunagin is Executive Vice President and Land Manager of RELP. He has held this position since January 2006 and has served in this position with its predecessor entity, OREI, since 1990. He is responsible for all contracts with other industry partners and all land activities required for exploration, development and production, including lease acquisition, title opinions, curative, permitting, unitization, rights-of-way and environmental issues. A graduate of the University of Mississippi in 1969 with a B.B.A. degree, Walt’s career has also involved land work for ExxonMobil, ChevronTexaco, UNOCAL, Santa Fe Energy and Oryx Energy (now Kerr-McGee). Walt is a member of the Dallas Association of Petroleum Landmen, the Association of International Petroleum Negotiators, and the American Association of Professional Landmen.

21

Byron H. (Howard) Dean is Manager – Acquisitions and Divestitures of RELP and is responsible for solicitation and technical evaluation of acquisition and development opportunities for Reef. A registered petroleum engineer, Mr. Dean has over 30 years of industry experience with oil and natural gas operations and reservoir engineering, both domestic onshore and offshore. Prior to joining RELP in 2006, Mr. Dean was Senior Petroleum Engineer and Acquisition and Divestiture Specialist for PLS, Inc. in 2006, and Senior Acquisitions Engineer of Noble Royalties, Inc. from 2004 to 2007.  From 1998 to 2004, Mr. Dean was an engineering consultant to H&D Management, and from 1997 to 1998 he was Operations Manager for Hrubetz Oil Company.  Mr. Dean served as Senior Staff Engineer for Coda Energy from 1988 to 1997 and for Santa Fe Minerals from 1983 to 1988.  He was Senior Reservoir Engineer for General American Oil Company from 1979 to 1983, worked for Amoco Production Company from 1974 to 1979, attaining the position of Senior Petroleum Engineer. He is a 1974 graduate of the University of Texas at Arlington with a Bachelor of Science degree in Civil Engineering. Mr. Dean is an active member of the Society of Petroleum Engineers, the Society of Petroleum Evaluation Engineers, ADAM Energy Forum, and Texas Independent Producer and Royalty Owners Association.

Daniel C. Sibley became Chief Financial Officer of RELP in March 2010 and General Counsel of RELP in January 2009.  He previously served as Chief Financial Officer of Reef from December 1999 until his appointment to General Counsel of RELP. He also served as Chief Financial Officer for RELP from January 2006 until his appointment to General Counsel of RELP, and had served in this same position with RELP’s predecessor entity, OREI, since 1998. Mr. Sibley was employed as a Certified Public Accountant with Grant Thornton from 1977 to 1980. From 1980 to 1994, he was involved in the private practice of law. He received a B.B.A. in accounting from the University of North Texas in 1973, a law degree (J.D.) from the University of Texas in 1977, and a Master of Laws-Taxation degree (L.L.M.) from Southern Methodist University in 1984. Mr. Sibley became a certified public accountant in 1977, but no longer maintains this license.

L. Mark Price is Controller of RELP and Chief Financial Officer of Pure Reef L.P., an affiliate of Reef. Mr. Price was appointed to his position with RELP in March 2010 and to his position with Pure Reef in October 2009. Mr. Price joined RELP in January 2009 as Chief Financial Officer of RELP. He served in that capacity until October 2009 when he became Chief Financial Officer of Pure Reef L.P. He has over twenty-two years of experience working in the oil and gas and manufacturing industries. He previously served as the Chief Financial Officer for The Terramar Group, Inc., an international oil and gas and manufacturing company, beginning in 2007. From 2004 to 2007, he served as the Chief Accounting Officer for Lancer Corporation, an international manufacturing company. Additionally, Mr. Price served as the Chief Financial Officer of Nunn Manufacturing, and for PCLC Asset Management after its acquisition of Nunn Manufacturing in 1998, from 1996 until 2004. Mr. Price received his BBA in accounting and finance from Texas Tech University in 1984 and is a licensed certified public accountant in the state of Texas. In October 2003, Mr. Price filed a personal bankruptcy petition under Chapter 7 in U.S. Bankruptcy Court, Northern District of Texas. On September 30, 2004, the court granted a discharge under §727 of the U.S. Bankruptcy Code.

David M. Tierney, the Chief Financial Reporting Officer and Treasurer of RELP, has been employed by RELP since January 2006 and was previously with its predecessor entity, OREI, Inc., since March 2001.  Mr. Tierney became Chief Financial Reporting Officer of RELP in March 2010 and Treasurer of RELP in May 2009. Prior to that, Mr. Tierney served as Chief Accounting Officer – Public Partnerships of RELP starting in July 2008. From 2001 to 2008, Mr. Tierney was the Controller of the Reef Global Energy Ventures and Reef Global Energy Ventures II partnerships.  Mr. Tierney received a Bachelor's degree from Davidson College in 1974, a Masters of Business Administration from Tulane University in 1976, and is a Texas Certified Public Accountant.  Mr. Tierney has worked in public accounting, and has worked in the oil and gas industry since 1979.  From 1992 through 2000 he served as controller/treasurer of an independent oil and gas exploration company.

Audit Committee and Nominating Committee

Because the Partnership has no directors, it does not have an audit committee, an audit committee financial expert or a nominating committee.

Code of Ethics

Because the Partnership has no employees, it does not have a code of ethics.  Employees of the Partnership's managing general partner, Reef, must comply with Reef's Code of Ethics, a copy of which will be provided to investor partners, without charge, upon request made to Reef Oil and Gas Partners, L.P., 1901 N. Central Expressway, Suite 300, Richardson, Texas 75080, Attention: Daniel C. Sibley.

22

ITEM 11. EXECUTIVE COMPENSATION.

The following table summarizes the items of compensation to be received by Reef as the managing general partner of the Partnership.

Recipient	Form of Compensation	Amount
Managing General Partner	Partnership interest (excluding any partnership interest resulting from the purchase of units)	10% interest
Managing General Partner	Management fee	15% of subscriptions
Managing General Partner and its Affiliates	Direct and administrative costs	Reimbursement at cost
Affiliate of the Managing General Partner	Operator's per-well charges	Competitive prices
Managing General Partner and its Affiliates	Payment for equipment, supplies, marketing, and other services	Cost or competitive prices

Reef's "partnership interest," as described in the table above, refers only to its interest as managing general partner and does not include the interest Reef has as the result of its purchase of units in the Partnership, nor the 1% interest Reef has as the result of its payment of 1% of all lease costs, intangible drilling and development costs, and well completion costs. Reef purchased 5.01% of the outstanding Partnership units. Reef received a 10% interest as managing general partner of the Partnership and a 1% interest as a result of Reef’s payment of 1% of all lease costs, intangible drilling and development costs, and well completion costs for a total of an 11% interest.  This 11% interest was not represented by partnership units. During 2006, Reef voluntarily gave up its 10% interest received for forming the Partnership, and now has only a 1% interest in the Partnership that is not represented by partnership units.  As a result, Reef has a total interest in the Partnership of 5.96%.

Reef received a management fee of $1,424,916, which is 15% of the Partnership subscriptions exclusive of the units purchased by Reef. From this amount Reef paid all of the Partnership's organization and offering costs, including sales commissions. The Partnership recorded $1,374,916 of this payment as offering costs, and $50,000 as organization costs in the December 31, 2004 financial statements.

Reef is reimbursed for direct costs and all documented out-of-pocket expenses incurred on behalf of the Partnership, including administrative costs. During the years ended December 31, 2009, 2008, and 2007, the Partnership reimbursed Reef $0, $4,721, and ($1,558), respectively, for technical services costs which have been capitalized as project costs, and $42,468, $44,370, and $16,802, respectively, for administrative costs included as general and administrative expenses.

Operator fees are payable to RELP on the nine prospects where RELP serves as operator. RELP receives fees at the competitive rate in the geographical area of the prospects during the drilling and production phase of operations. These fees are charged as a monthly fee per well as agreed to in an operating agreement signed by the Partnership as well as outside third party working interest owners in the wells. During the years ended December 31, 2009, 2008, and 2007, the Partnership paid operator fees totaling $4,690, $4,361, and $5,236 to RELP. RELP serves as operator for nine Partnership prospects upon which five successful and four unsuccessful wells were drilled. Of the five successful wells drilled, two are currently producing and three have ceased production.

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

The following table sets forth information as of December 31, 2009 concerning all persons known by Reef to own beneficially more than 5% of the interests in the Partnership. Unless expressly indicated otherwise, each partner exercises sole voting and investment power with respect to the units beneficially owned.

23

Person or Group	Number of Units Beneficially Owned		Percent of Total Partnership Units Outstanding			Percentage of Total Partnership Interests Beneficially Owned
Reef Oil & Gas Partners, L.P. (1)		25.028		5.01	%		4.96	%
Reef Oil & Gas Partners, L.P. (1)		—		—			1.00	%

(1) Reef Oil & Gas Partners, L.P.’s address is 1901 N. Central Expressway, Suite 300, Richardson, Texas 75080.

The managing general partner holds a 1% interest in the Partnership as a result of paying 1% of all leasehold, drilling and completion costs. In addition to this 1% interest not represented by Partnership units, Reef purchased 5.01% of the 500 Partnership units and, therefore, holds 5.01% of the 99% interest in the Partnership (4.96%) held by the unit holders.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS, AND DIRECTOR INDEPENDENCE

Reef is the managing general partner of the Partnership.  Along with its affiliates, Reef has entered into agreements with, and received compensation from, the Partnership for services it performs for the Partnership. See Item 11. – Executive Compensation.

ITEM 14. PRINCIPAL ACCOUNTANT FEES AND SERVICES.

The Partnership incurred professional audit and tax fees from its principal auditor BDO Seidman, LLP, as disclosed in the table below:

	2009		2008
Audit fees	$	48,825	$	35,075
Audit related fees	$	—	$	—
Tax  fees	$	—	$	1,397
Tax related fees	$	—	$	—

Fees for tax services are for review of the Partnership’s tax return.

PART IV

ITEM 15.                      EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K.

(a)	1. Financial Statements
	Report of Independent Registered Public Accounting Firm	F-1
	Balance Sheets	F-2
	Statements of Operations	F-3
	Statements of Partnership Equity	F-4
	Statements of Cash Flows	F-5
	Notes to Financial Statements	F-6
	2. Financial Statement Schedules	None
	3. Exhibits

A list of the exhibits filed or furnished with this report on Form 10-K (or incorporated by reference to exhibits previously filed or furnished by us) is provided in the Exhibit Index in this report.  Those exhibits incorporated by reference herein are indicated as such by the information supplied in the parenthetical thereafter. Otherwise, the exhibits are filed herewith.

24

SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: April 2, 2010	REEF GLOBAL ENERGY IV, L.P.
	Reef Oil & Gas Partners, L.P.
	Managing General Partner
	By:	Reef Oil & Gas Partners, GP, LLC
		General Partner
	By:	/s/ Michael J. Mauceli
		Michael J. Mauceli
		Manager (principal executive officer)

25

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

Signature	Title	Date
/s/ Michael J. Mauceli	Manager and Member of the general partner of Reef	April 2, 2010
Michael J. Mauceli	Oil & Gas Partners, L.P. (principal executive officer)
/s/ Daniel C. Sibley	Chief Financial Officer	April 2, 2010
Daniel C. Sibley	Reef Exploration, L.P.
	(principal financial and accounting officer)

26

EXHIBIT INDEX

3.1(a)(i)	Certificate of Limited Partnership of Reef Global Energy IV, L.P., dated November 10, 2004.
3.1(a)(ii)	Certificate of Amendment to the Certificate of Limited Partnership of Reef Global Energy IV, L.P., dated August 27, 2008 (incorporated by reference to Exhibit 3.1(i)(a) to Form 8-K, SEC File No. 000-53539, as filed with the SEC on September 3, 2008).
3.1(a)(iii)	Certificate of Amendment to the Certificate of Limited Partnership of Reef Global Energy IV, L.P., dated August 28, 2008 (incorporated by reference to Exhibit 3.1(i)(b) to Form 8-K, SEC File No. 000-53539, as filed with the SEC on September 3, 2008).
3.2	Form of Limited Partnership Agreement (incorporated by reference to Appendix A to the prospectus filed as part of Post-Effective Amendment No. 1 to Registration Statement on  Form S-1, SEC File No.333-93399, as filed with the SEC on September 14, 2001).
10.1	Letter Agreement, dated November 7, 2001, by and between Reef Partners LLC and Challenger Minerals Inc. (incorporated by reference to Exhibit 10.2 of the Annual Report on Form 10-K of Reef Global Energy Ventures as filed with the SEC on March 5, 2002).
23.2*	Consent of Forrest A. Garb & Associates, Inc.
31.1*	Certification of Principal Executive Officer pursuant to Rule 13a-14(a) under the Securities Exchange Act of 1934.
31.2*	Certification of Principal Financial Officer pursuant to Rule 13-14(a) under the Securities Exchange Act of 1934.
32.1*	Certification of Principal Executive Officer pursuant to 18 U.S.C. §1350.
32.2*	Certification of Principal Financial Officer pursuant to 18 U.S.C. §1350.
99.1*	Summary Reserve Report of Forrest A. Garb & Associates, Inc.

* Attached herewith

27

Reef Global Energy IV, L.P.

Financial Statements

Years Ended December 31, 2009, 2008 and 2007

Contents

Report of Independent Registered Public Accounting Firm	F-1
Audited Financial Statements
Balance sheets	F-2
Statements of operations	F-3
Statements of partnership equity	F-4
Statements of cash flows	F-5
Notes to financial statements	F-6

28

Report of Independent Registered Public Accounting Firm

The Partners

Reef Global Energy IV, L.P.

We have audited the accompanying balance sheets of Reef Global Energy IV, L.P. (the “Partnership”) as of December 31, 2009 and 2008, and the related statements of operations, partnership equity, and cash flows for each of the three years in the period ended December 31, 2009.  These financial statements are the responsibility of the Partnership’s management. Our responsibility is to express an opinion on these financial statements based on our audits.

We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. The Partnership is not required to have, nor were we engaged to perform, an audit of its internal control over financial reporting. An audit includes consideration of internal control over financial reporting as a basis for designing audit procedures that are appropriate in the circumstances, but not for the purpose of expressing an opinion on the effectiveness of the Partnership’s internal control over financial reporting. Accordingly, we express no such opinion. An audit also includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements, assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion.

In our opinion, the financial statements referred to above present fairly, in all material respects, the financial position of Reef Global Energy IV, L.P. at December 31, 2009, and 2008, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2009, in conformity with accounting principles generally accepted in the United States of America.

As discussed in Note 2 to the financial statements, effective December 31, 2009, the Partnership changed its reserve estimates and related disclosures as a result of adopting new oil and gas reserve estimation and disclosure requirements.

The accompanying financial statements have been prepared assuming that the Partnership will continue as a going concern. As discussed in Note 1 to the financial statements, the Partnership has suffered significant impairment losses, erosion of partnership equity, and projected declines in cash flow from operations that raise substantial doubt about its ability to continue as a going concern. Management’s plans in regard to these matters are also described in Note 1. The financial statements do not include any adjustments that might result from the outcome of this uncertainty.

BDO Seidman, LLP

Dallas, Texas

April 2, 2010

F-1

Reef Global Energy IV, L.P.

Balance Sheets

December 31,	2009			2008
Assets
Current assets:
Cash and cash equivalents	$	91,957		$	106,454
Total current assets		91,957			106,454
Oil and natural gas properties, full cost method of accounting:
Proved properties, net of accumulated depletion of $8,581,474 and $8,470,972		140,593			245,613
Net oil and natural gas properties		140,593			245,613
Total assets	$	232,550		$	352,067
Liabilities and partnership equity
Current liabilities:
Accounts payable	$	1,017		$	436
Accounts payable to affiliates		61,548			16,801
Total current liabilities		62,565			17,237
Long-term liabilities:
Asset retirement obligation		93,805			122,213
Total long-term liabilities		93,805			122,213
Commitments and contingencies (Note 5)
Partnership equity
Limited partners		(52,528	)		11,300
Managing general partner		128,708			201,317
Partnership equity		76,180			212,617
Total liabilities and partnership equity	$	232,550		$	352,067

See accompanying notes to financial statements.

F-2

Reef Global Energy IV, L.P.

Statements of Operations

	For the Years Ended December 31,
	2009			2008			2007
Revenues	$	153,080		$	315,781		$	231,283
Costs and expenses:
Lease operating expenses		58,866			51,904			59,971
Production taxes		7,916			19,858			14,256
Depreciation, depletion and amortization		43,995			59,324			62,949
Property impairment		52,189			—			56,256
Accretion of asset retirement obligation		2,905			3,519			43,039
General and administrative expenses		109,641			115,783			70,953
Total costs and expenses		275,512			250,388			307,424
Income (loss) from operations		(122,432	)		65,393			(76,141	)
Other income:
Interest income		741			762			1,155
Net income (loss)	$	(121,691	)	$	66,155		$	(74,986	)
Net income (loss) per general partner unit	$	—		$	122.41		$	(97.88	)
Net income (loss) per limited partner unit	$	(86.36	)	$	235.70		$	(97.88	)
Net loss per managing general partner unit	$	(3,223.15	)	$	(1,829.83	)	$	(1,138.48	)

See accompanying notes to financial statements.

F-3

Reef Global Energy IV, L.P.

Statements of Partnership Equity

	General partners						Limited partners					Managing general partner					Total
	Units			Amount			Units		Amount			Units		Amount			Units		Amount
Balance at December 31, 2006		125.000		$	24,716			349.972	$	69,198			25.028	$	25,524			500.000	$	119,438
Partner contributions		—			—			—		—			—		76,245			—		76,245
Partner distributions		—			(9,022	)		—		(25,258	)		—		(2,170	)		—		(36,450	)
Net loss		—			(12,235	)		—		(34,257	)		—		(28,494	)		—		(74,986	)
Balance at December 31, 2007		125.000			3,459			349.972		9,683			25.028		71,105			500.000		84,247
Distribution amount per partnership unit				$	72.17				$	72.17				$	86.70
Balance at December 31, 2007		125.000			3,459			349.972		9,683			25.028		71,105			500.000		84,247
Partner contributions		—			—			—		—			—		183,215			—		183,215
Partner distributions		—			(10,148	)		—		(103,646	)		—		(7,206	)		—		(121,000	)
Net income (loss)		—			15,302			—		96,650			—		(45,797	)		—		66,155
Conversion of general partner units into limited partner units (Note 1)		(125.000	)		(8,613	)		125.000		8,613			—		—			—		—
Balance at December 31, 2008		—		$	—			474.972	$	11,300			25.028	$	201,317			500.000	$	212,617
Distribution amount per partnership unit				$	81.18				$	239.58				$	287.92
Balance at December 31, 2008		—			—			474.972		11,300			25.028		201,317			500.000		212,617
Partner contributions		—			—			—		—			—		9,504			—		9,504
Partner distributions		—			—			—		(22,806	)		—		(1,444	)		—		(24,250	)
Net loss		—			—			—		(41,022	)		—		(80,669	)		—		(121,691	)
Balance at December 31, 2009		—		$	—			474.972	$	(52,528	)		25.028	$	128,708			500.000	$	76,180
Distribution amount per partnership unit				$	—				$	48.02				$	57.70

See accompanying notes to financial statements.

F-4

Reef Global Energy IV, L.P.

Notes to Financial Statements

Reef Global Energy IV, L.P.

Statements of Cash Flows

	For the Years Ended December 31,
	2009			2008			2007
Operating Activities
Net income (loss)	$	(121,691	)	$	66,155		$	(74,986	)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Plugging and abandonment costs paid from ARO		(16,994	)		(1,096	)		—
Adjustments for non-cash transactions:
Depreciation, depletion and amortization		43,995			59,324			62,949
Property impairment		52,189			—			56,256
Accretion of asset retirement obligation		2,905			3,519			43,039
Changes in operating assets and liabilities:
Accounts payable		581			354			(144	)
Accounts payable to affiliates		39,264			11,313			(58,380	)
Net cash provided by operating activities		249			139,569			28,734
Investing Activities
Property acquisition and development		—			(170,342	)		(104,498	)
Net cash used in investing activities		—			(170,342	)		(104,498	)
Financing Activities
Partner capital contributions		9,504			182,463			104,917
Partner distributions		(24,250	)		(121,000	)		(36,450	)
Net cash provided by (used in) financing activities		(14,746	)		61,463			68,467
Net increase (decrease) in cash and cash equivalents		(14,497	)		30,690			(7,297	)
Cash and cash equivalents at beginning of period		106,454			75,764			83,061
Cash and cash equivalents at end of period	$	91,957		$	106,454		$	75,764
Non-cash investing transactions:
Property additions included in accounts payable to affiliates	$	5,483		$	—		$	—
Property additions and asset retirement obligation	$	—		$	410		$	—
Adjustment to asset retirement obligation	$	14,319		$	18,377		$	—
Non-cash financing transactions:
Managing partner contributions included in accounts receivable from or accounts payable to affiliates	$	—		$	—		$	752

See accompanying notes to financial statements.

F-5

Reef Global Energy IV, L.P.

Notes to Financial Statements

1. Organization and Basis of Presentation

Reef Global Energy IV, L.P. (the “Partnership”) is the fourth in a series of five Nevada limited partnerships comprising a program called Reef Global Energy Ventures (the “Program”), pursuant to an S-1 Registration Statement declared effective by the Securities and Exchange Commission (the “SEC”) on May 31, 2001. In order to be formed, each partnership was required to sell a minimum of 50 partnership units at $20,000 per unit, including units purchased by the managing general partner. Each partnership formed as a part of the Program offered a maximum of 500 units for sale, consisting of a maximum of 375 limited partner units and a maximum of 125 general partner units. Reef Global Energy IV, L.P. offered 500 units for sale ($10,000,000), consisting of up to 375 limited partner units and up to 125 general partner units. Investor funds were held in escrow and were subject to reimbursement with interest if the minimum number of units were not sold. The Program filed a prospectus supplement with the SEC on September 21, 2004 describing the Partnership, and commenced offering units in the Partnership. Upon reaching the minimum subscription level, the Partnership was formed on November 10, 2004. The Partnership offering closed December 2, 2004, with sales to outside investors totaling 125 general partner units and 349.972 limited partner units, and sales to the managing general partner totaling 25.028 limited partner units.

The Partnership is a Nevada limited partnership formed under the Nevada Uniform Limited Partnership Act. Reef Oil & Gas Partners, L.P. (“Reef”) serves as the Partnership’s managing general partner. Partnership interests are held by the managing general partner and non-Reef partners who are general and limited partners (“investor partners”). The managing general partner received a 10% interest in the Partnership as compensation for forming the Partnership, and also holds a 1% interest in the Partnership as a result of paying 1% of all leasehold, drilling and completion costs. This 11% interest was not represented by Partnership units. In addition, Reef purchased 5.01% of the Partnership units and, therefore, held 5.01% of the 89% interest in the Partnership (4.46%) held by the unit holders. Effective August 1, 2006, Reef reduced the interest it received as compensation for forming the Partnership from 10% to 5%, and effective November 1, 2006 it reduced this interest from 5% to 0%. Therefore, effective November 1, 2006, Reef holds a 1% interest in the partnership as a result of paying 1% of all leasehold, drilling and completion costs. This 1% interest is not represented by Partnership units. Effective November 1, 2006 Reef holds 5.01% of the 99% interest in the Partnership (4.96%) held by the unit holders. The Partnership primarily purchased working interests in exploratory and developmental drilling prospects and drilled oil and gas wells located onshore in the continental United States and in U.S. coastal waters in the Gulf of Mexico. Other partnerships formed as a part of this Program, as well as other private drilling partnerships managed by Reef also own interests in some of these wells. In instances where Reef affiliated entities own a majority working interest in a well, the well may be operated by OREI, Inc. (“OREI”) or Reef Exploration, L.P. (“RELP”), affiliates of the managing general partner.

Pursuant to the Partnership Agreement of the Partnership, all general partner units held by investors other than the managing general partner were converted into limited partner units. This conversion of general partner units into limited partner units occurred during the 3rd quarter of 2008. The additional general partner equity at June 30, 2008 was transferred to limited partner equity, and all income and expense items during the third quarter of 2008 were allocated between the managing general partner and the limited partners.

Under the terms of the partnership agreement, certain income and expense items are allocated differently between the managing general partner and the investor partners. Allocations of income and expense to the managing general partner and investor partners are made quarterly based upon the number and type of partnership units held at the end of the quarter.

Quarterly cash distributions to partners are based upon the number and type of partnership units held at the close of the quarter. Prior to August 1, 2006, cash distributions to partners of the net cash flow from interest income and crude oil and natural gas sales revenues, less operating, general and administrative, and other costs were distributed 15.46% to the managing general partner (based upon the 11% interest not represented by units and the 4.46% interest represented by Partnership units) and 84.54% to investor partners. Effective November 1, 2006, cash distributions are distributed 5.96% to the managing general partner (based upon the 1% interest not represented by units and the 4.96% interest represented by Partnership units) and 94.04% to investor partners.

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Reef Global Energy IV, L.P.

Notes to Financial Statements (continued)

Going Concern

The accompanying financial statements have been prepared assuming the Partnership is a going concern, which assumption contemplates the realization of assets and satisfaction of liabilities in the normal course of business. The Partnership has suffered losses from operations that have utilized a major portion of partnership equity. While the Partnership appears to have adequate liquidity at December 31, 2009, there can be no assurance that such liquidity will remain sufficient.

These factors raise substantial doubt about the Partnership’s ability to continue as a going concern. The financial statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amount of liabilities that might be necessary should the Partnership be unable to continue in existence.

The managing general partner is considering several options related to the Partnership, including the possible sale of marketable assets, as a result of the recurring losses incurred over the past several years, the erosion of partnership equity, and the lack of significant cash flows from operations.

2. Summary of Accounting Policies

Use of Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the amounts reported in the financial statements and accompanying notes. Actual results could differ from these estimates.

Cash and Cash Equivalents

The Partnership considers all highly liquid investments with maturity dates of no more than three months from the purchase date to be cash equivalents. Cash and cash equivalents consist of demand deposits and money market investments invested with a major national bank, which at times may exceed federally insured limits. The Partnership has not experienced any losses in such accounts, and does not expect any loss from this exposure. The carrying value of the Partnership’s cash equivalents approximates fair value.

Risks and Uncertainties

Historically, the oil and gas market has experienced significant price fluctuations. Prices are impacted by local weather, supply in the area, availability and price of competitive fuels, seasonal variations in local demand, limited transportation capacity to other regions, and the worldwide supply and demand balance for crude oil.

The Partnership has not engaged in commodity futures trading or hedging activities and has not entered into derivative financial instrument transactions for trading or other speculative purposes. Accordingly, the Partnership is at risk for the volatility in commodity prices inherent in the oil and gas industry, and the level of commodity prices has a significant impact on the Partnership’s results of operations.

Oil and Gas Properties

The Partnership follows the full cost method of accounting for oil and gas properties. Under this method, all direct costs and certain indirect costs associated with acquisition of properties and successful as well as unsuccessful exploration and development activities are capitalized. Depreciation, depletion, and amortization of capitalized oil and gas properties and estimated future development costs, excluding unproved properties, are based on the unit-of-production method using estimated proved reserves, as determined by independent petroleum engineers.  For these purposes, proved natural gas reserves are converted to equivalent barrels of crude oil at a rate of 6 Mcf to 1 Bbl.

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Reef Global Energy IV, L.P.

Notes to Financial Statements (continued)

In applying the full cost method at December 31, 2009, the Partnership performs a quarterly ceiling test on the capitalized costs of oil and gas properties, whereby the capitalized costs of oil and gas properties are limited to the  sum of the estimated future net revenues from proved reserves using prices that are the 12-month un-weighted arithmetic average of the first-day-of-the-month price for crude oil and natural gas held constant and discounted at 10%, plus the lower of cost or estimated fair value of unproved properties, if any. If capitalized costs exceed the ceiling, an impairment loss is recognized for the amount by which the capitalized costs exceed the ceiling, and is shown as a reduction of oil and gas properties and as property impairment expense on the Partnership’s statements of operations. No gain or loss is recognized upon sale or disposition of oil and gas properties, unless such a sale would significantly alter the rate of depletion and amortization. During the years ended December 31, 2009, 2008, and 2007, the Partnership recognized property impairment expense of proved properties totaling $52,189, $0, and $56,256, respectively.

Estimates of Proved Oil and Gas Reserves

Estimates of the Partnership’s proved reserves at December 31, 2009 have been prepared and presented in accordance with new SEC rules and accounting standards. These new rules are effective for fiscal years ending on or after December 31, 2009, and require SEC reporting entities to prepare their reserve estimates using revised reserve definitions and revised pricing based upon the un-weighted arithmetic average of the first-day-of-the-month commodity prices over the preceding 12-month period and current costs. Estimates of the Partnership’s proved reserves at December 31, 2008 and 2007 have been prepared and presented using previous SEC rules and accounting standards that required pricing based upon end-of-period commodity prices and costs. Future prices and costs may be materially higher or lower than these prices and costs, which would impact the estimate of reserves and future cash flows. The proved reserve information included in this report was based upon evaluations prepared by independent petroleum engineers.

Reserves and their relation to estimated future net cash flows impact the Partnership’s depletion and impairment calculations. As a result, adjustments to depletion and impairment are made concurrently with changes to reserve estimates. If proved reserve estimates decline, the rate at which depletion expense is recorded increases, reducing net income. A decline in estimated proved reserves and future cash flows also reduces the capitalized cost ceiling and may result in increased impairment expense.

The adoption of the new SEC rules and accounting standards at December 31, 2009 resulted in a downward adjustment of $167,140 to the estimated discounted future cash flows from proved reserves, and in a reduction of 1,840 BOE equivalent of proved reserves. Additionally, the change resulted in additional depletion expense of $713, but no additional impairment expense,  in the fourth quarter of 2009.

Restoration, Removal, and Environmental Liabilities

The Partnership is subject to extensive Federal, state and local environmental laws and regulations. These laws regulate the discharge of materials into the environment and may require the Partnership to remove or mitigate the environmental effects of the disposal or release of petroleum substances at various sites. Environmental expenditures are expensed or capitalized depending on their future economic benefit. Expenditures that relate to an existing condition caused by past operations and that have no future economic benefit are expensed.

Liabilities for expenditures of a non-capital nature are recorded when environmental assessments and/or remediation is probable, and the costs can be reasonably estimated. Such liabilities are generally undiscounted values unless the timing of cash payments for the liability or component is fixed or reliably determinable.

Asset retirement costs and liabilities associated with future site restoration and abandonment of long-lived assets are initially measured at fair value which approximates the cost a third party would incur in performing the tasks necessary to retire such assets. The fair value is recognized in the financial statements as the present value of expected future cash expenditures for site restoration and abandonment. Subsequent to the initial measurement, the effect of the passage of time on the liability for the net asset retirement obligation (accretion expense) and the amortization of the asset retirement cost are recognized in the results of operations.

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Reef Global Energy IV, L.P.

Notes to Financial Statements (continued)

The following table summarizes the Partnership’s asset retirement obligation for the years ended December 31, 2009 and 2008.

	2009			2008
Beginning asset retirement obligation	$	122,213		$	137,757
Additions related to new properties		—			410
Accretion expense		2,905			3,519
Retirement related to property abandonment and restoration		(31,313	)		(19,473	)
Ending asset retirement obligation	$	93,805		$	122,213

Recognition of Revenue

The Partnership enters into sales contracts for disposition of its share of crude oil and natural gas production from productive wells. Revenues are recognized based upon the Partnership’s share of metered volumes delivered to its purchasers each month. The Partnership had no material gas imbalances at December 31, 2009, 2008, and 2007.

Income Taxes

The Partnership’s net income or loss flows directly through to its partners, who are responsible for the payment of Federal taxes on their respective share of any income or loss. Therefore, there is no provision for federal income taxes in the accompanying financial statements.

As of December 31, 2009, the tax basis of the Partnership’s assets exceeds the financial reporting basis of the assets by approximately $1.77 million, primarily due to the difference between property impairment costs deducted for financial reporting purposes and intangible drilling costs deducted for income tax purposes.

Accounting for Uncertainty in Income Taxes

FASB provides guidance on accounting for uncertainty in income taxes. This guidance is intended to clarify the accounting for uncertainty in income taxes recognized in a company’s financial statements and prescribes the recognition and measurement of a tax position taken or expected to be taken in a tax return. It also provides guidance on de-recognition, classification, interest and penalties, accounting in interim periods, disclosure and transition.

Under this guidance, evaluation of a tax position is a two-step process. The first step is to determine whether it is more-likely-than-not that a tax position will be sustained upon examination, including the resolution of any related appeals or litigation based on the technical merits of that position. The second step is to measure a tax position that meets the more-likely-than-not threshold to determine the amount of benefit to be recognized in the financial statements. A tax position is measured at the largest amount of benefit that is greater than 50% likely of being realized upon ultimate settlement.

Tax positions that previously failed to meet the more-likely-than-not recognition threshold should be recognized in the first subsequent period in which the threshold is met. Previously recognized tax positions that no longer meet the more-likely-than-not criteria should be de-recognized in the first subsequent reporting period in which the threshold is no longer met. Penalties and interest are classified as income tax expense.

Based on the Partnership’s assessment, there are no material uncertain tax positions as of December 31, 2009.

Fair Value of Financial Instruments

The estimated fair values for financial instruments have been determined at discrete points in time based on relevant market information. These estimates involve uncertainties and cannot be determined with precision. The estimated fair value of cash, accounts receivable and accounts payable approximates their carrying value due to their short-term nature. 

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Reef Global Energy IV, L.P.

Notes to Financial Statements (continued)

Reclassifications

Certain information provided for prior years has been reclassified to conform to the current year presentation adopted as of December 31, 2009.

Recently Adopted Accounting Pronouncements

Modernization of Oil and Gas Reporting

In January 2009, the SEC adopted new rules related to modernizing reserve calculation and disclosure requirements for oil and gas companies, which became effective prospectively for annual reporting periods ending on or after December 31, 2009. In addition to expanding the definition and disclosure requirements for crude oil and natural gas reserves, the new rule changes the requirements for determining quantities of crude oil and natural gas reserves. The new rule requires disclosure of crude oil and natural gas proved reserves by geographical area, using the unweighted arithmetic average of first-day-of-the-month commodity prices over the preceding 12-month period, rather than end-of-period prices, and allows the use of reliable technologies to estimate proved crude oil and natural gas reserves, if those technologies have been demonstrated to result in reliable conclusions about reserve volumes.  In addition, in January 2010, the FASB issued guidance relating to crude oil and natural gas reserve estimation and disclosures to provide consistency with the new SEC rules.  The Partnership adopted the new standards effective December 31, 2009.  The new standards are applied prospectively as a change in estimate. The effect of applying the un-weighted arithmetic average of first-day-of-the-month commodity prices over the preceding 12-month period, versus applying the 2009 end-of-period price, decreased net proved reserves by 11.1%. The standardized measure of discounted future net cash flows for the year ended December 31, 2009 was lower by $167,140 using the new rule as compared to amounts calculated using the previous rules.  The effect of applying the new rule resulted in additional depletion expense of $713, but no additional impairment expense.

Accounting Standards Codification

In June 2009, the Financial Accounting Standards Board (“FASB”) issued guidance on the accounting standards codification and the hierarchy of generally accepted accounting principles. The accounting standards codification is intended to be the source of authoritative US GAAP and reporting standards as issued by the FASB. Its primary purpose is to improve clarity and use of existing standards by grouping authoritative literature under common topics. The accounting standards codification is effective for financial statements issued for interim and annual periods ending after September 15, 2009. The Partnership now describes the authoritative guidance used within the footnotes but no longer uses numerical references. The accounting standards codification does not change or alter existing US GAAP, and there has been no expected impact on the Partnership’s financial position, results of operations or cash flows.

Fair Value Measurement of Liabilities

In August 2009, the FASB issued new guidance for the accounting for the fair value measurement of liabilities.  The new guidance provides clarification that in certain circumstances in which a quoted price in an active market for the identical liability is not available, a company is required to measure fair value using one or more of the following valuation techniques: the quoted price of the identical liability when traded as an asset, the quoted prices for similar liabilities or similar liabilities when traded as assets, and/or another valuation technique that is consistent with the principles of fair value measurements.  The new guidance is effective for interim and annual periods beginning after August 27, 2009.  The Partnership does not expect that the provisions of the new guidance will have a material effect on its results of operations, financial position or liquidity.

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Reef Global Energy IV, L.P.

Notes to Financial Statements (continued)

Subsequent Events

In May 2009, the FASB issued new guidance on accounting for subsequent events.  This guidance established general standards of accounting for and disclosure of events that occur after the balance sheet date but before financial statements are issued or are available to be issued. This guidance is effective for interim and annual reporting periods ending after June 15, 2009. The Partnership adopted the provisions of this guidance for the period ended June 30, 2009. In February 2010, the FASB issued an update to this guidance. Among other provisions, this update provides that an entity that is a SEC filer is not required to disclose the date through which subsequent events have been evaluated. The Partnership adopted the provisions on its effective date of February 24, 2010. There was no impact on the Partnership’s operating results, financial position or cash flows.

Recognition and Presentation of Other-Than-Temporary Impairments

In April 2009, the FASB issued new guidance related to the presentation and disclosure of other-than-temporary impairments on debt and equity securities.  The new guidance amends the other-than-temporary impairment guidance for debt securities to make the guidance more operational and to improve the presentation and disclosure of other-than-temporary impairments on debt and equity securities in the financial statements.  The guidance does not amend existing recognition and measurement guidance for equity securities, but does establish a new method of recognizing and reporting for debt securities.  Disclosure requirements for impaired debt and equity securities have been expanded significantly and are now required quarterly, as well as annually.  This guidance became effective for interim and annual reporting periods ending after June 15, 2009.  Comparative disclosures are required for periods ending after the initial adoption.  This guidance did not have an impact on the Partnership’s financial position, results of operations or cash flows.

Interim Reporting of Fair Value of Financial Instruments

In April 2009, the FASB issued new guidance related to the disclosure of the fair value of financial instruments.  The new guidance amends SFAS No. 107, “Disclosures about Fair Value of Financial Instruments,” to require disclosures about fair value of financial instruments for interim reporting periods.  The guidance also amends APB Opinion No. 28, “Interim Financial Reporting,” to require those disclosures about the fair value of financial instruments in summarized financial information at interim reporting periods.  This guidance is effective for reporting periods ending after June 15, 2009.  The adoption of this guidance did not have any impact on the Partnership’s results of operations, cash flows, or financial position.

3. Transactions with Affiliates

The Partnership has no employees. RELP, an affiliate of Reef formed in 2005, employs a staff including geologists, petroleum engineers, landmen and accounting personnel who administer all of the Partnership’s operations. The Partnership reimburses RELP for technical and administrative services at cost. During the years ended December 31, 2009, 2008, and 2007, the Partnership incurred technical services and administrative costs totaling $42,468, $49,091, and $15,244, respectively. Of these amounts, $0, $4,721, and ($1,558) represent technical services costs capitalized as project costs, and $42,468, $44,370, and $16,802 represent administrative costs included as general and administrative expenses.

Reef contributed 1% of all leasehold, drilling, and completion costs when incurred during the drilling and completion phases of Partnership operations. During the year ended December 31, 2008, this 1% obligation totaled $11. Reef also purchased 5.01% of the Partnership units and pays 5.01% of the 99% of these costs paid by the unit holders (4.96%). In addition, Reef agreed to reimburse the Partnership for the workover of a Partnership well which occurred during the first quarter of 2008, and 100% of the costs of drilling and completing a well in Terrebonne Parish, Louisiana. Reef contributed $380,694 related to these obligations, $9,504 of which was contributed during the year ended December 31, 2009.  Of these total cumulative obligations, $107,254 related to the reimbursement of 100% of the costs of drilling and completing a well in Terrebonne Parish, Louisiana.  Reef has no remaining obligations related to these additional costs subsequent to December 31, 2008.

RELP processes joint interest billings and revenue payments on behalf of the Partnership. At December 31, 2009 and 2008, the Partnership owed RELP $61,548 and $16,801, respectively, for joint interest and technical and administrative charges processed in excess of revenues.

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Reef Global Energy IV, L.P.

Notes to Financial Statements (continued)

If an affiliate of Reef serves as operator of a Partnership prospect, then operator fees are payable to the affiliate. Under such circumstances, such affiliate receives fees at the competitive rate in the geographical area where the prospect is located during the drilling and production phase of operations. These fees are charged as a monthly fee per well as agreed to in an operating agreement signed by the Partnership as well as outside third party working interest owners in the well. During the years ended December 31, 2009, 2008, and 2007, the Partnership paid operator fees of $4,690, $4,361, and $5,236, respectively, to RELP in connection with this obligation.

4. Major Customers

The Partnership sells crude oil and natural gas on credit terms to refiners, pipelines, marketers, and other users of petroleum commodities. Revenues are received directly from these parties or, in certain circumstances, paid to the operator of the property who disburses to the Partnership its percentage share of the revenues. During the year ended December 31, 2009, two marketers and one operator accounted for 25.3%, 18.5%, and 54.9% of the Partnership’s crude oil and natural gas revenues, respectively. During the year ended December 31, 2008, three marketers and one operator accounted for 34.2%, 17.9%, 11.0%, and 29.7% of the Partnership’s crude oil and natural gas revenues, respectively. During the year ended December 31, 2007, four marketers and one operator accounted for 41.0%, 17.2%, 16.8%, 13.4%, and 10.7% of the Partnership’s crude oil and natural gas revenues, respectively.  Due to the competitive nature of the market for purchase of crude oil and natural gas, the Partnership does not believe that the loss of any particular purchaser would have a material adverse impact on the Partnership.

5. Commitments and Contingencies

The Partnership is not currently involved in any legal proceedings.

6. Partnership Equity

Sales of Partnership units began on September 21, 2004. Proceeds received were placed into an interest bearing escrow account until the Partnership reached the minimum subscription level of 50 units. The Partnership was formed on November 10, 2004, and the sale of Partnership units was closed on December 2, 2004 when all 500 Partnership units were sold. The Partnership raised $9,499,441 from the sale of 474.972 Partnership units to investor partners. Reef purchased the remaining 25.028 units (5.01%) for $425,475. Reef also contributed 1% of all leasehold, drilling, and completion costs as incurred, in addition to having paid its pro rata share (4.96%) of the leasehold, drilling, and completion costs paid by the Partnership. In addition, Reef reimbursed the Partnership for 100% of the costs of drilling an unsuccessful developmental well and 100% of the costs of drilling and completing a successful sidetrack to the unsuccessful developmental well in Louisiana. In connection with these obligations, Reef had contributed $273,440 to the Partnership at December 31, 2009.

The Partnership also retained the interest income earned during 2004 and 2005, totaling $68,585, for use during the drilling phase of the Partnership.

All units, except those purchased by Reef, paid a 15% management fee to Reef to pay for Partnership organization and offering costs, including sales commissions. These costs totaled $1,424,916, leaving net capital contributions of $8,842,025 available for Partnership oil and gas activities. Of the $1,424,916, offering costs were $1,374,916 and organization costs were $50,000.

Reef exclusively manages and controls all aspects of the business of the Partnership. The Partnership agreement prohibits participation by investor partners in the Partnership’s day-to-day business decisions.

7. Partnership Projects

During 2004-2006, the Partnership utilized the $8,640,194 of net capital contributions to drill thirteen wells and to purchase royalty interests in a field in Louisiana with two producing oil and gas properties. The Partnership drilled six successful developmental wells and one successful exploratory well, two of which are still productive, and drilled two developmental dry holes and four exploratory dry holes. One of the royalty interest properties purchased by the Partnership is still productive.

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Reef Global Energy IV, L.P.

Notes to Financial Statements (continued)

In August 2006, the managing general partner agreed to pay 100% of the costs for a working interest in a developmental well in Louisiana. The well completed drilling operations in May 2007 and was unsuccessful, however, after reviewing the well logs and other geologic data, the wellbore was re-entered during the fourth quarter of 2007 and successfully sidetracked. Sidetrack drilling operations were completed during February 2008 and the well began production in May 2008. Reef agreed to pay 100% of the cost of the successful sidetrack operations and completion costs. As of December 31, 2009 the Partnership had incurred and been reimbursed $189,303 of costs related to this well. The amounts reimbursed are classified as additional capital contributions on the accompanying balance sheet.

RELP serves as operator of nine of the wells drilled by the Partnership. Four of these wells were unsuccessful and five were successful wells, of which three are still productive at December 31, 2009.

8. Supplemental Information on Oil & Natural Gas Exploration and Production Activities

    (Unaudited)

Capitalized Costs

The following table presents the Partnership’s aggregate capitalized costs relating to oil and gas activities at the end of each of the years indicated:

December 31,	2009			2008			2007
Oil and natural gas properties:
Unproved properties	$	—		$	—		$	—
Proved properties		8,722,067			8,716,585			8,545,833
		8,722,067			8,716,585			8,545,833
Less:
Accumulated depreciation, depletion and amortization		(493,675	)		(435,362	)		(357,661	)
Property impairment		(8,087,799	)		(8,035,610	)		(8,035,610	)
Total	$	140,593		$	245,613		$	152,562

Costs Incurred

The following table sets forth costs incurred in oil and natural gas acquisition, exploration, and development activities during the years ended December 31, 2009, 2008, and 2007:

	2009		2008		2007
Oil and natural gas properties:
Exploration	$	262	$	1,474	$	(24	)
Development		5,220		169,278		104,650
Total	$	5,482	$	170,752	$	104,626

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Reef Global Energy IV, L.P.

Notes to Financial Statements (continued)

Results of Operations

The following table sets forth results of operations from oil and gas producing activities for the years ended December 31, 2009, 2008, and 2007:

	2009			2008			2007
Oil and gas producing activities:
Oil sales	$	91,100		$	127,875		$	56,780
Natural gas sales		61,980			187,906			174,503
Production expenses		(66,782	)		(71,762	)		(74,227	)
Accretion of asset retirement obligation		(2,905	)		(3,519	)		(43,039	)
Depreciation , depletion and amortization		(43,995	)		(59,324	)		(62,949	)
Property impairment expense		(52,189	)		—			(56,256	)
Results of  producing activities	$	(12,791	)	$	181,176		$	(5,188	)
Depletion rate per BOE	$	10.84		$	13.26		$	13.88

BOE = Barrels of Oil Equivalent (6 MCF equals 1 BOE)

Crude Oil and Natural Gas Reserves

Recent SEC and FASB Rule Making Activity

In January 2009, the SEC adopted new rules related to modernizing reserve calculation and disclosure requirements for oil and gas companies, which became effective prospectively for annual reporting periods ending on or after December 31, 2009. The Partnership adopted the rules effective December 31, 2009, and the rule changes, including those related to pricing and technology, are included in the Partnership’s reserve estimates. See Note 2, “Summary of Significant Accounting Policies – Modernization of Oil and Gas Reporting.”

In accordance with new SEC rules, estimates of the Partnership’s proved reserves and future net revenues are made using the unweighted arithmetic average of first-day-of-the-month commodity prices over the preceding 12 month period for the year ended December 31, 2009. These prices are held constant in accordance with SEC guidelines for the economic life of the wells included in the reserve report but are adjusted by well in accordance with sales contracts, energy content quality, transportation, compression and gathering fees, and regional price differentials. Estimated quantities of proved reserves and future net revenues are affected by crude oil and natural gas prices, which have fluctuated significantly in recent years.

The new rules resulted in the use of lower prices at December 31, 2009 for both crude oil and natural gas than would have been used under the previous rules, and resulted in a downward adjustment of approximately 1,840 BOE to our proved reserves as of December 31, 2009, as compared to the old end-of-period prices rule.

Net Proved Developed Reserve Summary

The reserve information presented below is based upon estimates of net proved reserves that were prepared by the independent petroleum engineering firms Forrest A. Garb & Associates, Inc., as of December 31, 2009, and by Gleason Engineering as of December 31, 2008 and 2007.   A copy of the Forrest A. Garb & Associates summary reserve report is included as Exhibit 99.1 to this Annual Report.  Proved crude oil and natural gas reserves are the estimated quantities of crude oil and natural gas which geological and engineering data demonstrate with reasonable certainty to be economically recoverable in future years from known reservoirs under existing economic conditions, operating methods and governmental regulations (i.e. prices and costs as of the date the estimate is made).  Proved developed reserves are reserves that can be expected to be recovered through existing wells with existing equipment and operating methods.  At December 31, 2009, all of the Partnership’s reserves are classified as proved developed reserves.  All of the Partnership’s reserves are located in the United States.

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Reef Global Energy IV, L.P.

Notes to Financial Statements (continued)

The following table sets forth changes in estimated net proved developed crude oil and natural gas reserves for the years ended December 31, 2009, 2008, and 2007.

	Oil (BBL) (1)			Gas (mcf)			BOE (2)
Net proved developed reserves for properties owned by the Partnership:
Reserves at December 31, 2006		1,185			65,178			12,048
Revisions of previous estimates		(252	)		(40,471	)		(6,997	)
New discoveries		3,037			72,551			15,129
Production		(795	)		(22,447	)		(4,536	)
Reserves at December 31, 2007		3,175			74,811			15,644
Revisions of previous estimates		3,911			27,378			8,474
Production		(1,305	)		(19,016	)		(4,475	)
Reserves at December 31, 2008		5,781			83,173			19,643
Revisions of previous estimates		466			(7,553	)		(793	)
Production		(1,727	)		(14,000	)		(4,060	)
Reserves at December 31, 2009		4,520			61,620			14,790

(1) Oil includes both oil and natural gas liquids

(2) BOE (barrels of oil equivalent) is calculated by converting 6 MCF of natural gas to 1 BBL of crude oil. A BBL (barrel) of crude oil is one stock tank barrel, or 42 U.S. gallons liquid volume, of crude oil or other liquid hydrocarbons.

Standardized Measure of Discounted Future Net Cash Flows

Certain information concerning the assumptions used in computing the valuation of proved reserves and their inherent limitations are discussed below.  The Partnership believes such information is essential for a proper understanding and assessment of the data presented.

For the year ended December 31, 2009, future cash inflows are computed by applying the new SEC pricing, which holds constant the unweighted arithmetic average of the first-day-of-the-month prices for crude oil and natural gas over the preceding 12-month period as the price basis for estimating the Partnership’s proved reserves. For the year ended December 31, 2009, calculations were made using average prices of $61.08 per barrel of crude oil and $3.83 per MCF of natural gas. For the years ending December 31, 2008 and 2007, future cash inflows were computed by applying the former SEC pricing rules, which hold constant the end-of-year price for crude oil and natural gas as the price basis for estimating the Partnership’s proved reserves. During 2008, the calculations were made using average prices of $44.60 per barrel of oil and $5.71 per MCF of natural gas.  During 2007, the calculations were made using average prices of $89.16 per barrel of oil and $7.21 per MCF of natural gas. Prices and costs are held constant for the life of the wells, however, prices are adjusted by well in accordance with sales contracts, energy content quality, transportation, compression and gathering fees, and regional price differentials.

These assumptions used to compute estimated future cash inflows do not necessarily reflect Reef’s expectations of the Partnership’s actual revenues or costs, nor their present worth. Further, actual future net cash flows will be affected by factors such as the amount and timing of actual production, supply and demand for crude oil and natural gas, and changes in governmental regulations and tax rates. Sales prices of both crude oil and natural gas have fluctuated significantly in recent years. Reef, as managing general partner, does not rely upon the following information in making investment and operating decisions for the Partnership.

Future development and production costs are computed by estimating the expenditures to be incurred in developing and producing the proved crude oil and natural gas reserves at the end of the year, based on year-end costs and assuming continuation of existing economic conditions.

A 10% annual discount rate is used to reflect the timing of the future net cash flows relating to proved reserves.

F-15

Reef Global Energy IV, L.P.

Notes to Financial Statements (continued)

December 31,	2009			2008			2007
Oil and natural gas properties owned by the Partnership:
Future cash inflows	$	563,230		$	769,676		$	789,360
Future production costs		(268,210	)		(338,637	)		(310,806	)
Future development costs		—			—			(8,857	)
Future net cash flows		295,020			431,039			469,697
Effect of discounting net cash flows at 10%		(47,600	)		(91,295	)		(113,487	)
Discounted future net cash flows	$	247,420		$	339,744		$	356,210

Changes in the Standardized Measure of Discounted Future Net Cash flows Relating to Proved Crude Oil and Natural Gas Reserves

December 31,	2009			2008			2007
Oil and natural gas properties owned by the Partnership:
Standardized measure at beginning of period	$	339,744		$	356,210		$	139,220
Extensions and discoveries		—			—			517,409
Purchase of minerals in place		—			—			—
Net change in sales price, net of production costs		(32,664	)		(106,619	)		161,491
Revisions of quantity estimates		(14,778	)		204,318			(90,401	)
Net changes in estimated future development costs		—			(25,096	)		10,559
Changes in production timing rates		4,537			115,810			(281,973	)
Accretion of discount		33,974			35,621			13,922
Sales net of production costs		(83,393	)		(240,500	)		(114,017	)
Net increase (decrease)		(92,324	)		(16,466	)		216,990
Standardized measure at end of year	$	247,420		$	339,744		$	356,210

F-16

EX-23.2

EX-31.1

EX-31.2

Exhibit 31.2

Certification of Principal Financial Officer

Pursuant to Rule 13a-14(a) of the

Securities Exchange Act of 1934

I, Daniel C. Sibley, certify that:

1) I have reviewed this Annual Report on Form 10-K of Reef Global Energy IV, L.P. for the fiscal year ended December 31, 2009;

2) Based on my knowledge, this annual report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3) Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4) The registrant’s other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)), and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f) for the registrant and have:

a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principals;

c) Evaluated the effectiveness of the registrant’s disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's fourth fiscal quarter that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting.

5) The registrant’s other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant’s auditors and the audit committee of registrant’s board of directors (or persons performing the equivalent functions):

a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant’s ability to record, process, summarize and report financial information; and

b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant’s internal control over financial reporting.

Date:  April 2, 2010	/s/ Daniel C. Sibley
	Daniel C. Sibley
	Chief Financial Officer
	Reef Exploration, L.P.
	(principal financial and accounting officer)

EX-32.1

Exhibit 32.1

CERTIFICATION OF PRINCIPAL EXECUTIVE OFFICER

PURSUANT TO 18 U.S.C. § 1350  AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Reef Global Energy IV, L.P. (the Partnership) on Form 10-K for the fiscal year ended December 31, 2009 as filed with the Securities and Exchange Commission on the date hereof (the Report), I, Michael J. Mauceli, principal executive officer of Reef Oil & Gas Partners, L.P., the managing general partner of Reef Global Energy IV, L.P., certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Partnership.

Date:  April 2, 2010	Reef Oil & Gas Partners, L.P.
	Managing General Partner
	By: Reef Oil & Gas Partners, GP, LLC
	/s/ Michael J. Mauceli
	Michael J. Mauceli
	Manager and Member
	(principal executive officer)

This certification accompanies the Report pursuant to §906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by the Partnership for purposes of §18 of the Securities Exchange Act of 1934, as amended.

A signed original of this written statement required by §906 has been provided to the Partnership and will be retained by the partnership and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

Exhibit 32.2

CERTIFICATION OF PRINCIPAL FINANCIAL OFFICER

PURSUANT TO 18 U.S.C. § 1350 AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Reef Global Energy IV, L.P. (the Partnership) on Form 10-K for the fiscal year ended December 31, 2009 as filed with the Securities and Exchange Commission on the date hereof (the Report), I, Daniel C. Sibley, principal financial officer of Reef Global Energy IV, L.P., certify, pursuant to 18 U.S.C. § 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that, to my knowledge:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Partnership.

Date:  April 2, 2010	/s/ Daniel C. Sibley
	Daniel C. Sibley
	Chief Financial Officer
	Reef Exploration, L.P.
	(principal financial and accounting officer)

This certification accompanies the Report pursuant to §906 of the Sarbanes-Oxley Act of 2002 and shall not, except to the extent required by the Sarbanes-Oxley Act of 2002, be deemed filed by the Partnership for purposes of §18 of the Securities Exchange Act of 1934, as amended.

A signed original of this written statement required by §906 has been provided to the Partnership and will be retained by the partnership and furnished to the Securities and Exchange Commission or its staff upon request.

EX-99.1