UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D. C. 20549

FORM 10-Q

(Mark One)

[ X ]  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES

EXCHANGE ACT OF 1934

For the quarterly period ended June 30, 2013

or

[    ]TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES

EXCHANGE ACT OF 1934

For the transition period fromto

Commission File No. 1-8968

ANADARKO PETROLEUM CORPORATION

(Exact name of registrant as specified in its charter)

Delaware	76-0146568
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)

1201 Lake Robbins Drive, The Woodlands, Texas 77380-1046

(Address of principal executive offices)

Registrant’s telephone number, including area code (832) 636-1000

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  ý    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate website, 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  ý    No  ¨

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  ý    Accelerated filer  ¨    Non-accelerated filer  ¨    Smaller reporting company  ¨

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

The number of shares outstanding of the Company’s common stock at June 30, 2013, is shown below:

Title of Class	Number of Shares Outstanding
Common Stock, par value $0.10 per share	502,705,709

TABLE OF CONTENTS

PART I		Page
Item 1.	Financial Statements
	Consolidated Statements of Income for the Three and Six Months Ended June 30, 2013 and 2012	2
	Consolidated Statements of Comprehensive Income for the Three and Six Months Ended June 30, 2013 and 2012	3
	Consolidated Balance Sheets at June 30, 2013, and December 31, 2012	4
	Consolidated Statement of Equity for the Six Months Ended June 30, 2013	5
	Consolidated Statements of Cash Flows for the Six Months Ended June 30, 2013 and 2012	6
	Notes to Consolidated Financial Statements	7
Item 2.	Management’s Discussion and Analysis of Financial Condition and Results of Operations	25
Item 3.	Quantitative and Qualitative Disclosures About Market Risk	43
Item 4.	Controls and Procedures	44
PART II
Item 1.	Legal Proceedings	45
Item 1A.	Risk Factors	45
Item 2.	Unregistered Sales of Equity Securities and Use of Proceeds	46
Item 6.	Exhibits	47

PART I. FINANCIAL INFORMATION

Item 1. Financial Statements

ANADARKO PETROLEUM CORPORATION

CONSOLIDATED STATEMENTS OF INCOME

(Unaudited)

	Three Months Ended   June 30,						Six Months Ended   June 30,
millions except per-share amounts	2013			2012			2013			2012
Revenues and Other
Natural-gas sales	$	935		$	496		$	1,742		$	1,069
Oil and condensate sales	1,995			2,222			4,372			4,466
Natural-gas liquids sales	261			282			564			624
Gathering, processing, and marketing sales	249			200			480			453
Gains (losses) on divestitures and other, net	57			22			232			57
Total	3,497			3,222			7,390			6,669
Costs and Expenses
Oil and gas operating	245			249			492			491
Oil and gas transportation and other	253			223			508			463
Exploration	178			1,121			442			1,365
Gathering, processing, and marketing	222			178			421			367
General and administrative	260			262			532			531
Depreciation, depletion, and amortization	940			1,027			1,962			1,957
Other taxes	245			326			525			703
Impairments	10			112			39			162
Algeria exceptional profits tax settlement	—			—			33			(1,804		)
Deepwater Horizon settlement and related costs	4			3			7			11
Total	2,357			3,501			4,961			4,246
Operating Income (Loss)	1,140			(279		)	2,429			2,423
Other (Income) Expense
Interest expense	172			190			336			376
(Gains) losses on derivatives, net	(656		)	(44		)	(465		)	(328		)
Other (income) expense, net	98			(519		)	92			(254		)
Total	(386		)	(373		)	(37		)	(206		)
Income (Loss) Before Income Taxes	1,526			94			2,466			2,629
Income tax expense (benefit)	567			164			1,023			516
Net Income (Loss)	959			(70		)	1,443			2,113
Net income attributable to noncontrolling interests	30			19			54			46
Net Income (Loss) Attributable to Common Stockholders	$	929		$	(89	)	$	1,389		$	2,067
Per Common Share
Net income (loss) attributable to common stockholders—basic	$	1.84		$	(0.18	)	$	2.75		$	4.11
Net income (loss) attributable to common stockholders—diluted	$	1.83		$	(0.18	)	$	2.74		$	4.10
Average Number of Common Shares Outstanding—Basic	502			500			501			499
Average Number of Common Shares Outstanding—Diluted	504			500			504			501
Dividends (per Common Share)	$	0.09		$	0.09		$	0.18		$	0.18

See accompanying Notes to Consolidated Financial Statements.

2

ANADARKO PETROLEUM CORPORATION

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME

(Unaudited)

	Three Months Ended   June 30,					Six Months Ended   June 30,
millions	2013		2012			2013		2012
Net Income (Loss)	$	959	$	(70	)	$	1,443	$	2,113
Other Comprehensive Income (Loss), net of taxes
Reclassification of previously deferred derivative losses to    (gains) losses on derivatives, net (1)	1		2			3		4
Adjustments for pension and other postretirement plans
Amortization of net actuarial (gain) loss to general and    administrative expense (2)	19		14			38		29
Amortization of net prior service (credit) cost to general and    administrative expense	—		1			—		1
Total adjustments for pension and other postretirement plans	19		15			38		30
Total	20		17			41		34
Comprehensive Income (Loss)	979		(53		)	1,484		2,147
Comprehensive income attributable to noncontrolling interests	30		19			54		46
Comprehensive Income (Loss) Attributable to Common Stockholders	$	949	$	(72	)	$	1,430	$	2,101

 __________________________________________________________________

⁽¹⁾  Net of income tax benefit (expense) of $(1) million for the three months ended June 30, 2013, $(1) million for the three months ended June 30, 2012, $(2) million for the six months ended June 30, 2013, and $(2) million for the six months ended June 30, 2012.

⁽²⁾  Net of income tax benefit (expense) of $(11) million for the three months ended June 30, 2013, $(9) million for the three months ended June 30, 2012, $(21) million for the six months ended June 30, 2013, and $(17) million for the six months ended June 30, 2012.

See accompanying Notes to Consolidated Financial Statements.

3

ANADARKO PETROLEUM CORPORATION

CONSOLIDATED BALANCE SHEETS

(Unaudited)

	June 30,			December 31,
millions	2013			2012
ASSETS
Current Assets
Cash and cash equivalents	$	4,581		$	2,471
Accounts receivable (net of allowance of $5 million and $7 million)
Customers	1,302			1,473
Others	1,254			1,274
Algeria exceptional profits tax settlement	32			730
Other current assets	730			847
Total	7,899			6,795
Properties and Equipment
Cost	66,975			63,598
Less accumulated depreciation, depletion, and amortization	27,144			25,200
Net properties and equipment	39,831			38,398
Other Assets	1,893			1,716
Goodwill and Other Intangible Assets	5,677			5,680
Total Assets	$	55,300		$	52,589
LIABILITIES AND EQUITY
Current Liabilities
Accounts payable	$	3,286		$	2,989
Current asset retirement obligations	285			298
Accrued expenses	1,442			707
Total	5,013			3,994
Long-term Debt	13,538			13,269
Other Long-term Liabilities
Deferred income taxes	9,378			8,759
Asset retirement obligations	1,630			1,587
Other	2,032			3,098
Total	13,040			13,444
Equity
Stockholders’ equity
Common stock, par value $0.10 per share (1.0 billion shares authorized, 521.2 million and 518.6 million shares issued)	52			51
Paid-in capital	8,481			8,230
Retained earnings	15,126			13,829
Treasury stock (18.5 million and 18.1 million shares)	(871		)	(841		)
Accumulated other comprehensive income (loss)	(599		)	(640		)
Total Stockholders’ Equity	22,189			20,629
Noncontrolling interests	1,520			1,253
Total Equity	23,709			21,882
Total Liabilities and Equity	$	55,300		$	52,589

See accompanying Notes to Consolidated Financial Statements.

4

ANADARKO PETROLEUM CORPORATION

CONSOLIDATED STATEMENT OF EQUITY

(Unaudited)

	Total Stockholders’ Equity
	Common Stock		Paid-in Capital		Retained Earnings			Treasury Stock			Accumulated Other Comprehensive Income (Loss)			Non- controlling Interests			Total Equity
millions
Balance at December 31, 2012	$	51	$	8,230	$	13,829		$	(841	)	$	(640	)	$	1,253		$	21,882
Net income (loss)	—		—		1,389			—			—			54			1,443
Common stock issued	1		166		—			—			—			—			167
Dividends—common	—		—		(92		)	—			—			—			(92		)
Repurchase of common stock	—		—		—			(30		)	—			—			(30		)
Subsidiary equity transactions (1)	—		85		—			—			—			280			365
Distributions to noncontrolling interest owners	—		—		—			—			—			(68		)	(68		)
Contributions from noncontrolling interest owners	—		—		—			—			—			1			1
Reclassification of previously deferred derivative losses to (gains) losses on derivatives, net	—		—		—			—			3			—			3
Adjustments for pension and other postretirement plans	—		—		—			—			38			—			38
Balance at June 30, 2013	$	52	$	8,481	$	15,126		$	(871	)	$	(599	)	$	1,520		$	23,709

 __________________________________________________________________

⁽¹⁾  The $85 millionincrease to paid-in capital, together with the Company’s net income (loss) attributable to common stockholders totaled $1,474 million for the six months ended June 30, 2013.

See accompanying Notes to Consolidated Financial Statements.

5

ANADARKO PETROLEUM CORPORATION

CONSOLIDATED STATEMENTS OF CASH FLOWS

(Unaudited)

	Six Months Ended   June 30,
millions	2013			2012
Cash Flows from Operating Activities
Net income (loss)	$	1,443		$	2,113
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Depreciation, depletion, and amortization	1,962			1,957
Deferred income taxes	563			143
Dry hole expense and impairments of unproved properties	263			1,187
Impairments	39			162
(Gains) losses on divestitures, net	(157		)	29
Unrealized (gains) losses on derivatives, net	(395		)	83
Other	121			120
Changes in assets and liabilities
Deepwater Horizon settlement and related costs	1			24
Algeria exceptional profits tax settlement	698			(1,691		)
Tronox-related contingent loss	—			(250		)
(Increase) decrease in accounts receivable	257			351
Increase (decrease) in accounts payable and accrued expenses	221			(486		)
Other items—net	(11		)	148
Net cash provided by (used in) operating activities	5,005			3,890
Cash Flows from Investing Activities
Additions to properties and equipment and dry hole costs	(3,531		)	(3,553		)
Acquisition of midstream business	(135		)	—
Divestitures of properties and equipment and other assets	418			258
Other—net	(341		)	(112		)
Net cash provided by (used in) investing activities	(3,589		)	(3,407		)
Cash Flows from Financing Activities
Borrowings, net of issuance costs	495			886
Repayments of debt	(245		)	(1,305		)
Increase (decrease) in outstanding checks	145			(39		)
Dividends paid	(92		)	(91		)
Repurchase of common stock	(30		)	(23		)
Issuance of common stock, including tax benefit on stock option exercises	95			38
Sale of subsidiary units	415			212
Distributions to noncontrolling interest owners	(68		)	(52		)
Contributions from noncontrolling interest owners	1			11
Net cash provided by (used in) financing activities	716			(363		)
Effect of Exchange Rate Changes on Cash	(22		)	(23		)
Net Increase (Decrease) in Cash and Cash Equivalents	2,110			97
Cash and Cash Equivalents at Beginning of Period	2,471			2,697
Cash and Cash Equivalents at End of Period	$	4,581		$	2,794

See accompanying Notes to Consolidated Financial Statements.

6

ANADARKO PETROLEUM CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

1. Summary of Significant Accounting Policies

General    Anadarko Petroleum Corporation is engaged in the exploration, development, production, and marketing of natural gas, crude oil, condensate, and natural gas liquids (NGLs). In addition, the Company engages in the gathering, processing, treating, and transporting of natural gas, crude oil, and NGLs. Unless the context otherwise requires, the terms “Anadarko” and “Company” refer to Anadarko Petroleum Corporation and its consolidated subsidiaries.

Basis of Presentation    The information furnished herein reflects all normal recurring adjustments that are, in the opinion of management, necessary for the fair presentation of the Company’s Consolidated Balance Sheets at June 30, 2013, and December 31, 2012, the Consolidated Statements of Income and Comprehensive Income for the three and six months ended June 30, 2013 and 2012, the Consolidated Statements of Cash Flows for the six months ended June 30, 2013 and 2012, and the Consolidated Statement of Equity for the six months ended June 30, 2013. Certain prior-period amounts have been reclassified to conform to the current-period presentation.

Use of Estimates    The preparation of financial statements in accordance with accounting principles generally accepted in the United States requires management to make informed judgments and estimates that affect the reported amounts of assets, liabilities, revenues, and expenses. Management evaluates its estimates and related assumptions regularly, including those related to the value of properties and equipment; proved reserves; goodwill; intangible assets; asset retirement obligations; litigation reserves; environmental liabilities; pension assets, liabilities, and costs; income taxes; and fair values. Changes in facts and circumstances or additional information may result in revised estimates, and actual results may differ from these estimates.

2. Inventories

       The following summarizes the major classes of inventories included in other current assets:

	June 30,		December 31,
millions	2013		2012
Crude oil	$	89	$	91
Natural gas	26		48
NGLs	49		37
Total	$	164	$	176

3. Acquisitions and Divestitures

Acquisitions    In March 2013, Western Gas Partners, LP (WES), a consolidated subsidiary of the Company, acquired a 33.75% interest in gas-gathering systems located in the Marcellus shale in north-central Pennsylvania from a third party for $135 million. In June 2013, WES acquired a 25% interest in a joint venture formed to design, construct, and own two fractionators located in Mont Belvieu, Texas from a third party for $78 million.

Divestitures    In the six months ended June 30, 2013, proceeds from divestitures of $418 million and net gains on divestitures of $157 million were primarily related to the Company’s divestiture of its interests in a soda ash joint venture during the first quarter of 2013.

7

ANADARKO PETROLEUM CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

4. Impairments

       The following summarizes impairments by segment:

	Three Months Ended   June 30,				Six Months Ended   June 30,
millions	2013		2012		2013		2012
Oil and gas exploration and production
Long-lived assets held for use
U.S. onshore properties	$	—	$	79	$	—	$	79
Gulf of Mexico properties	—		17		—		67
Cost-method investment	10		11		10		11
Midstream
Long-lived assets held for use	—		5		29		5
Impairments	$	10	$	112	$	39	$	162

       The Company impaired its Venezuelan cost-method investment in the second quarter of 2013 and 2012 due to declines in estimated recoverable value. In addition, during the first quarter of 2013, a midstream property was impaired due to a reduction in estimated future cash flows. In 2012, U.S. onshore and midstream properties were impaired primarily due to lower natural-gas prices and a Gulf of Mexico property was impaired as a result of downward reserves revisions for a property that was near the end of its economic life.

       The following summarizes the post-impairment fair value of the above-described assets, by asset category and input level within the fair-value hierarchy:

millions
2013	Level 1		Level 2		Level 3 (1)		Total
Long-lived assets held for use	$	—	$	—	$	23	$	23
Cost-method investment (2)	—		—		32		32
2012
Long-lived assets held for use	$	—	$	—	$	41	$	41
Cost-method investment (2)	—		—		34		34

 __________________________________________________________________

⁽¹⁾  The income approach was used to measure fair value.

⁽²⁾  This represents the Company’s after-tax net investment.

5. Suspended Exploratory Well Costs

       The Company’s suspended exploratory well costs were $2.1 billion at June 30, 2013, and December 31, 2012. Management believes projects with suspended exploratory well costs exhibit sufficient quantities of hydrocarbons to justify potential development and is actively pursuing efforts to assess whether reserves can be attributed to these projects. If additional information becomes available that raises substantial doubt as to the economic or operational viability of any of these projects, the associated costs will be expensed at that time. During the six months ended June 30, 2013, $95 million of exploratory well costs previously capitalized as suspended exploratory well costs for greater than one year at December 31, 2012, were charged to dry hole expense.

8

ANADARKO PETROLEUM CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

6. Noncontrolling Interests

       Western Gas Equity Partners, LP (WGP) is a consolidated subsidiary formed by Anadarko to own partnership interests in WES. At June 30, 2013, Anadarko’s ownership interest in WGP consisted of a 91.0% limited partner interest and the entire general partner interest.

       WES is a limited partnership formed by Anadarko to own, operate, acquire, and develop midstream assets. In May 2013, WES issued approximately seven million common units to the public, raising net proceeds of $416 million. At June 30, 2013, WGP’s ownership interest in WES consisted of a 43.1% limited partner interest, the entire 2.0% general partner interest, and all WES incentive distribution rights. At June 30, 2013, Anadarko also owned a 0.4% limited partner interest in WES through another subsidiary.

7. Derivative Instruments

Objective and Strategy    The Company uses derivative instruments to manage its exposure to cash-flow variability from commodity-price and interest-rate risks. Futures, swaps, and options are used to manage exposure to commodity-price risk inherent in the Company’s oil and natural-gas production and natural-gas processing operations (Oil and Natural-Gas Production/Processing Derivative Activities). Futures contracts and commodity-price swap agreements are used to fix the price of expected future oil and natural-gas sales at major industry trading locations, such as Henry Hub, Louisiana for natural gas and Cushing, Oklahoma or Sullom Voe, Scotland for oil. Basis swaps are periodically used to fix or float the price differential between product prices at one market location versus another. Options are used to establish a floor price, a ceiling price, or a floor and a ceiling price (collar) for expected future oil and natural-gas sales. Derivative instruments are also used to manage commodity-price risk inherent in customer price requirements and to fix margins on the future sale of natural gas and NGLs from the Company’s leased storage facilities (Marketing and Trading Derivative Activities).

       Interest-rate swaps are used to fix or float interest rates on existing or anticipated indebtedness. The purpose of these instruments is to manage the Company’s existing or anticipated exposure to unfavorable interest-rate changes. The fair value of the Company’s interest-rate swap portfolio increases (decreases) when interest rates increase (decrease).

       The Company does not apply hedge accounting to any of its derivative instruments. As a result, both realized and unrealized gains and losses associated with derivative instruments are recognized in earnings. Net derivative losses attributable to interest-rate derivatives previously subject to hedge accounting reside in accumulated other comprehensive income (loss) and are reclassified to earnings as the transactions to which the derivatives relate are recognized in earnings. See Note 10—Accumulated Other Comprehensive Income (Loss).

9

ANADARKO PETROLEUM CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

7. Derivative Instruments (Continued)

Oil and Natural-Gas Production/Processing Derivative Activities    The natural-gas prices listed below are New York Mercantile Exchange (NYMEX) Henry Hub prices. The crude-oil prices listed below are a combination of NYMEX West Texas Intermediate (WTI) and IntercontinentalExchange, Inc. (ICE) Brent prices. The following is a summary of the Company’s derivative instruments related to its Oil and Natural-Gas Production/Processing Derivative Activities at June 30, 2013:

	2013 Settlement			2014 Settlement
Natural Gas
Two-Way Collars (thousand MMBtu/d)	600		(1)	—
Average price per MMBtu
Ceiling sold price (call)	$	4.00		$	—
Floor purchased price (put)	$	3.18		$	—
Three-Way Collars (thousand MMBtu/d)	—		(2)	600
Average price per MMBtu
Ceiling sold price (call)	$	—		$	5.01
Floor purchased price (put)	$	—		$	3.75
Floor sold price (put)	$	—		$	2.75
Fixed-Price Contracts (thousand MMBtu/d)	1,185			600
Average price per MMBtu	$	4.00		$	4.26
Crude Oil
Three-Way Collars (MBbls/d)	26			—
Average price per barrel
Ceiling sold price (call)	$	125.15		$	—
Floor purchased price (put)	$	105.00		$	—
Floor sold price (put)	$	85.00		$	—
Fixed-Price Contracts (MBbls/d)	108			—
Average price per barrel	$	102.50		$	—

__________________________________________________________________

⁽¹⁾  The two-way collars have a contract term of April 2013 to October 2013.

⁽²⁾  The Company entered into offsetting purchased and sold natural-gas three-way collars of 450,000 MMBtu/d for 2013 settlement.

MMBtu—million British thermal units

MMBtu/d—million British thermal units per day

MBbls/d—thousand barrels per day

       A two-way collar is a combination of two options: a sold call and a purchased put. The sold call establishes the maximum price that the Company will receive for the contracted commodity volumes. The purchased put establishes the minimum price that the Company will receive for the contracted volumes.

       A three-way collar is a combination of three options: a sold call, a purchased put, and a sold put. The sold call establishes the maximum price that the Company will receive for the contracted commodity volumes. The purchased put establishes the minimum price that the Company will receive for the contracted volumes unless the market price for the commodity falls below the sold put strike price, at which point the minimum price equals the reference price (e.g., NYMEX) plus the excess of the purchased put strike price over the sold put strike price.

10

ANADARKO PETROLEUM CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

7. Derivative Instruments (Continued)

Marketing and Trading Derivative Activities    In addition to the positions in the previous table, the Company also engages in marketing and trading activities. These activities include physical product sales and related derivative transactions used to manage commodity-price risk. At June 30, 2013, the Company had fixed-price physical transactions related to natural gas totaling 8 billion cubic feet (Bcf), offset by derivative transactions totaling 8 Bcf. At December 31, 2012, the Company had fixed-price physical transactions related to natural gas totaling 10 Bcf, offset by derivative transactions totaling 10 Bcf.

Interest-Rate Derivatives    Anadarko has outstanding interest-rate swap contracts as a fixed-rate payer to mitigate the interest-rate risk associated with anticipated debt issuances. The Company locked in a fixed interest rate in exchange for a floating interest rate indexed to the three-month London Interbank Offered Rate. The swap instruments include a provision that requires both the termination of the swaps and cash settlement in full at the start of the reference period.

       The Company had the following outstanding interest-rate swaps at June 30, 2013:

millions except percentages		Reference Period		Weighted-Average
Notional Principal Amount		Start	End	Interest Rate
$	750	June 2014	June 2024	6.00%
$	1,100	June 2014	June 2044	5.57%
$	50	September 2016	September 2026	5.91%
$	750	September 2016	September 2046	5.86%

Effect of Derivative Instruments—Balance Sheet    The following summarizes the fair value of the Company’s derivative instruments:

	Gross Derivative Assets				Gross Derivative Liabilities
millions	June 30,		December 31,		June 30,			December 31,
Balance Sheet Classification	2013		2012		2013			2012
Commodity derivatives
Other current assets	$	486	$	475	$	(212	)	$	(197	)
Other assets	86		24		(24		)	(7		)
Accrued expenses	39		6		(49		)	(14		)
Other liabilities	—		1		(4		)	(7		)
	611		506		(289		)	(225		)
Interest-rate and other derivatives
Accrued expenses (1)	—		—		(589		)	—
Other liabilities (1)	—		—		(251		)	(1,194		)
	—		—		(840		)	(1,194		)
Total derivatives	$	611	$	506	$	(1,129	)	$	(1,419	)

 __________________________________________________________________

⁽¹⁾ Interest-rate swaps with June 2014 maturity dates were reclassified from other liabilities to accrued expenses during the second quarter of 2013.

11

ANADARKO PETROLEUM CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

7. Derivative Instruments (Continued)

Effect of Derivative Instruments—Statement of Income    The following summarizes realized and unrealized gains and losses related to derivative instruments:

millions	Three Months Ended   June 30, 2013									Six Months Ended   June 30, 2013
Classification of (Gain) Loss Recognized	Realized			Unrealized			Total			Realized			Unrealized			Total
Commodity derivatives
Gathering, processing, and marketing sales (1)	$	3		$	(6	)	$	(3	)	$	7		$	(2	)	$	5
(Gains) losses on derivatives, net	(21		)	(373		)	(394		)	(72		)	(39		)	(111		)
Interest-rate and other derivatives
(Gains) losses on derivatives, net	—			(262		)	(262		)	—			(354		)	(354		)
Total (gains) losses on derivatives, net	$	(18	)	$	(641	)	$	(659	)	$	(65	)	$	(395	)	$	(460	)
	Three Months Ended   June 30, 2012									Six Months Ended   June 30, 2012
Classification of (Gain) Loss Recognized	Realized			Unrealized			Total			Realized			Unrealized			Total
Commodity derivatives
Gathering, processing, and marketing sales (1)	$	(1	)	$	8		$	7		$	(3	)	$	13		$	10
(Gains) losses on derivatives, net	(263		)	(157		)	(420		)	(400		)	(68		)	(468		)
Interest-rate and other derivatives
(Gains) losses on derivatives, net	2			374			376			2			138			140
Total (gains) losses on derivatives, net	$	(262	)	$	225		$	(37	)	$	(401	)	$	83		$	(318	)

__________________________________________________________________

⁽¹⁾ Represents the effect of marketing and trading derivative activities.

Credit-Risk Considerations    The financial integrity of exchange-traded contracts, which are subject to nominal credit risk, is assured by NYMEX or ICE through systems of financial safeguards and transaction guarantees. Over-the-counter traded swaps, options, and futures contracts expose the Company to counterparty credit risk. The Company monitors the creditworthiness of its counterparties, establishes credit limits according to the Company’s credit policies and guidelines, and assesses the impact on fair value of its counterparties’ creditworthiness. The Company has the ability to require cash collateral or letters of credit to mitigate its credit-risk exposure. The Company has netting agreements with financial institutions that permit net settlement of gross commodity derivative assets against gross commodity derivative liabilities, and routinely exercises its contractual right to offset realized gains against realized losses when settling with derivative counterparties.

       In addition, the Company has setoff agreements with certain financial institutions that may be exercised in the event of default and provide for contract termination and net settlement across derivative types. At June 30, 2013, $437 million of the Company’s $1.1 billion gross derivative liability balance, and at December 31, 2012, $339 million of the Company’s $1.4 billion gross derivative liability balance, would have been eligible for setoff against the Company’s gross derivative asset balance in the event of default. Other than in the event of default, the Company does not net settle across derivative types.

       Some of the Company’s derivative instruments are subject to provisions that can require full or partial collateralization or immediate settlement of the Company’s obligations if certain credit-risk-related provisions are triggered. However, most of the Company’s derivative counterparties maintain secured positions with respect to the Company’s derivative liabilities under the Company’s $5.0 billion senior secured revolving credit facility ($5.0 billion Facility), the available capacity of which is sufficient to secure potential obligations to such counterparties.

12

ANADARKO PETROLEUM CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

7. Derivative Instruments (Continued)

       Unsecured derivative obligations may require immediate settlement or full collateralization if certain credit-risk-related provisions are triggered, such as the Company’s credit rating from major credit rating agencies declining to a level below investment grade. The aggregate fair value of derivative instruments with credit-risk-related contingent features for which a net liability position existed was $62 million (net of collateral) at June 30, 2013, and $94 million (net of collateral) at December 31, 2012. The current portion of these amounts was included in accrued expenses and the long-term portion of these amounts was included in other long-term liabilities—other on the Company’s Consolidated Balance Sheets.

Fair Value    Fair value of futures contracts is based on quoted prices in active markets for identical assets or liabilities, which represent Level 1 inputs. Valuations of physical-delivery purchase and sale agreements, over-the-counter financial swaps, and commodity option collars are based on similar transactions observable in active markets and industry-standard models that primarily rely on market-observable inputs. Inputs used to estimate the fair value of swaps and options include market-price curves; contract terms and prices; credit-risk adjustments; and, for Black-Scholes option valuations, implied market volatility and discount factors. Inputs used to estimate fair value in industry-standard models are categorized as Level 2 inputs because substantially all assumptions and inputs are observable in active markets throughout the full term of the instruments.

       The following summarizes the fair value of the Company’s derivative assets and liabilities, by input level within the fair-value hierarchy:

millions
June 30, 2013	Level 1			Level 2			Level 3		Netting (1)			Collateral			Total
Assets
Commodity derivatives
Financial institutions	$	3		$	550		$	—	$	(268	)	$	(1	)	$	284
Other counterparties	—			58			—		(7		)	—			51
Total derivative assets	$	3		$	608		$	—	$	(275	)	$	(1	)	$	335
Liabilities
Commodity derivatives
Financial institutions	$	(3	)	$	(269	)	$	—	$	268		$	2		$	(2	)
Other counterparties	—			(17		)	—		7			—			(10		)
Interest-rate and other derivatives	—			(840		)	—		—			—			(840		)
Total derivative liabilities	$	(3	)	$	(1,126	)	$	—	$	275		$	2		$	(852	)
December 31, 2012
Assets
Commodity derivatives
Financial institutions	$	6		$	453		$	—	$	(206	)	$	—		$	253
Other counterparties	—			47			—		(5		)	—			42
Total derivative assets	$	6		$	500		$	—	$	(211	)	$	—		$	295
Liabilities
Commodity derivatives
Financial institutions	$	(6	)	$	(202	)	$	—	$	206		$	1		$	(1	)
Other counterparties	—			(17		)	—		5			—			(12		)
Interest-rate and other derivatives	—			(1,194		)	—		—			—			(1,194		)
Total derivative liabilities	$	(6	)	$	(1,413	)	$	—	$	211		$	1		$	(1,207	)

 __________________________________________________________________

⁽¹⁾  Represents the impact of netting commodity derivative assets and liabilities with counterparties where the Company has the contractual right and intends to net settle.

13

ANADARKO PETROLEUM CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

8. Debt and Interest Expense

Debt    The Company’s outstanding debt is senior unsecured, except for borrowings, if any, under the $5.0 billion Facility. The following summarizes the Company’s outstanding debt:

	June 30,			December 31,
millions	2013			2012
Total debt at face value	$	15,202		$	14,952
Net unamortized discounts and premiums (1)	(1,664		)	(1,683		)
Total long-term debt	$	13,538		$	13,269

__________________________________________________________________

⁽¹⁾  Unamortized discounts and premiums are amortized over the term of the related debt.

       Anadarko’s $500 million aggregate principal amount of 7.625% Senior Notes due March 2014, $275 million aggregate principal amount of 5.750% Senior Notes due June 2014, and Zero-Coupon Senior Notes due 2036, which can be put to the Company in October 2013 for the then-accreted value, are classified as long-term debt on the Company’s Consolidated Balance Sheets, as the Company has the ability and intent to refinance these obligations using long-term debt.

Fair Value    The Company uses a market approach to determine fair value of its fixed-rate debt using observable market data, which results in a Level 2 fair-value measurement. The carrying amount of floating-rate debt approximates fair value as the interest rates are variable and reflective of market rates. The estimated fair value of the Company’s total borrowings was $15.6 billion at June 30, 2013, and $16.2 billion at December 31, 2012.

Debt Activity    The following summarizes the Company’s debt activity during the six months ended June 30, 2013:

	Carrying
millions	Value			Description
Balance at December 31, 2012	$	13,269
Borrowings	385			WES revolving credit facility
Other, net	9			Amortization of debt discounts and premiums
Balance at March 31, 2013	$	13,663
Borrowings	110			WES revolving credit facility
Repayments	(245		)	WES revolving credit facility
Other, net	10			Amortization of debt discounts and premiums
Balance at June 30, 2013	$	13,538

WES Borrowings    At June 30, 2013, WES was in compliance with all covenants contained in its five-year, $800 million senior unsecured revolving credit facility maturing in March 2016 (RCF), had outstanding borrowings under the RCF of $250 million at an interest rate of 1.70%, and had available borrowing capacity of $537 million ($800 million maximum capacity, less $250 million of outstanding borrowings and $13 million of outstanding letters of credit).

Interest Expense    The following summarizes interest expense:

	Three Months Ended   June 30,						Six Months Ended   June 30,
millions	2013			2012			2013			2012
Current debt, long-term debt, and other	$	238		$	236		$	470		$	486
Capitalized interest	(66		)	(46		)	(134		)	(110		)
Interest expense	$	172		$	190		$	336		$	376

14

ANADARKO PETROLEUM CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

9. Stockholders' Equity

The reconciliation between basic and diluted earnings per share attributable to common stockholders is as follows:

	Three Months Ended   June 30,					Six Months Ended   June 30,
millions except per-share amounts	2013		2012			2013		2012
Net income (loss)
Net income (loss) attributable to common stockholders	$	929	$	(89	)	$	1,389	$	2,067
Less distributions on participating securities	1		—			1		1
Less undistributed income allocated to participating securities	5		—			8		12
Basic	$	923	$	(89	)	$	1,380	$	2,054
Diluted	$	923	$	(89	)	$	1,380	$	2,054
Shares
Average number of common shares outstanding—basic	502		500			501		499
Dilutive effect of stock options	2		—			3		2
Average number of common shares outstanding—diluted	504		500			504		501
Excluded (1)	5		12			4		5
Net income (loss) per common share
Basic	$	1.84	$	(0.18	)	$	2.75	$	4.11
Diluted	$	1.83	$	(0.18	)	$	2.74	$	4.10
Dividends per common share	$	0.09	$	0.09		$	0.18	$	0.18

 __________________________________________________________________

⁽¹⁾  Inclusion of certain shares would have had an anti-dilutive effect.

10. Accumulated Other Comprehensive Income (Loss)

       The following summarizes the after-tax changes in the balances of each component of accumulated other comprehensive income (loss):

	Interest-rate
	Derivatives			Pension and
	Previously			Other
	Subject to Hedge			Postretirement
millions	Accounting			Plans			Total
Balance at December 31, 2012	$	(61	)	$	(579	)	$	(640	)
Reclassifications from accumulated other    comprehensive income (loss)	3			38			41
Balance at June 30, 2013	$	(58	)	$	(541	)	$	(599	)

11. Commitments

       In June 2013, the Company entered into a three-year operating lease agreement for a deepwater drillship expected to be delivered mid-2014. The lease obligation totals $464 million, with aggregate future annual minimum lease payments of $104 million in 2014, $154 million in 2015, $155 million in 2016, and $51 million in 2017.

15

ANADARKO PETROLEUM CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

12. Contingencies

General    The Company is a defendant in a number of lawsuits and is involved in governmental proceedings and regulatory controls arising in the ordinary course of business, including, but not limited to, personal injury claims; title disputes; tax disputes; royalty claims; contract claims; contamination claims relating to oil and gas production, transportation, and processing; and environmental claims, including claims involving assets owned by acquired companies. Anadarko is also subject to various environmental-remediation and reclamation obligations arising from federal, state, and local laws and regulations. While the ultimate outcome and impact on the Company cannot be predicted with certainty, after consideration of recorded expense and liability accruals, management believes that the resolution of pending proceedings will not have a material adverse effect on the Company’s consolidated financial position, results of operations, or cash flows.

       The following is a discussion of the material developments with respect to the contingencies previously reported in the Company’s Annual Report on Form 10-K for the year ended December 31, 2012, and material matters that have arisen since the filing of such report.

Deepwater Horizon Events    In April 2010, the Macondo well in the Gulf of Mexico blew out and an explosion occurred on the Deepwater Horizon drilling rig. The well was operated by BP Exploration and Production Inc. (BP) and Anadarko held a 25% nonoperated interest. In October 2011, the Company and BP entered into a settlement agreement relating to the Deepwater Horizon events (Settlement Agreement). Pursuant to the Settlement Agreement, the Company is fully indemnified by BP against claims and damages arising under the Oil Pollution Act of 1990 (OPA), claims for natural resource damages (NRD) and assessment costs, and other potential damages. This indemnification is guaranteed by BP Corporation North America Inc. (BPCNA) and, in the event that the net worth of BPCNA declines below an agreed-upon amount, BP p.l.c. has agreed to become the sole guarantor. Under the Settlement Agreement, BP does not indemnify the Company against fines and penalties, punitive damages, shareholder derivative or securities laws claims, or certain other claims. The Company has not recorded a liability for any costs that are subject to indemnification by BP. For additional disclosure of the Deepwater Horizon events, the Company’s Settlement Agreement with BP, environmental claims under OPA, NRD claims, potential penalties and fines, and civil litigation, see Note 17—Contingencies—Deepwater Horizon Events in the Notes to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2012.

Penalties and Fines    In December 2010, the U.S. Department of Justice (DOJ), on behalf of the United States, filed a civil lawsuit in the U.S. District Court in New Orleans, Louisiana (Louisiana District Court) against several parties, including Anadarko, seeking an assessment of civil penalties under the Clean Water Act (CWA) in an amount to be determined by the Louisiana District Court. In February 2012, the Louisiana District Court entered a declaratory judgment that, as a partial owner of the Macondo well, Anadarko is liable for civil penalties under Section 311 of the CWA. The declaratory judgment addresses liability only, and does not address the amount of any civil penalty. The assessment of a civil penalty against Anadarko has been reserved until a later proceeding to be scheduled by the Louisiana District Court. In August 2012, Anadarko filed a notice of appeal in the U.S. Court of Appeals for the Fifth Circuit concerning that portion of the February 2012 declaratory judgment finding Anadarko liable for civil penalties under the CWA. The appeal is pending.

16

ANADARKO PETROLEUM CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

12. Contingencies (Continued)

       As discussed below, numerous Deepwater Horizon event-related civil lawsuits have been filed against BP and other parties, including the Company. Certain state and local governments have appealed, or have provided indication of a likely appeal of, the Louisiana District Court’s decision that only federal law, and not state law, applies to Deepwater Horizon event-related claims. If any such appeal is successful, state and/or local laws and regulations could become sources of penalties or fines against the Company.

       Applicable accounting guidance requires the Company to accrue a liability if it is probable that a liability is incurred and the amount of the liability can be reasonably estimated. The Louisiana District Court’s declaratory judgment in February 2012 satisfies the requirement that a loss, arising from the future assessment of a civil penalty against Anadarko, is probable. Notwithstanding the declaratory judgment, the Company currently cannot estimate the amount of any potential civil penalty. The CWA sets forth subjective criteria, including degree of fault and history of prior violations, which significantly influence the magnitude of CWA penalty assessments. As a result of the subjective nature of CWA penalty assessments, the Company currently cannot estimate the amount of any such penalty nor determine a range of potential loss. Furthermore, neither the February 2012 settlement of Deepwater Horizon-related civil penalties (including those under the CWA) by the other nonoperating partner with the United States and five affected Gulf states (Texas, Louisiana, Mississippi, Alabama, and Florida) nor the January 2013 settlement of CWA civil and criminal penalties by the drilling contractor with the United States affects the Company’s current conclusion regarding its ability to estimate potential fines and penalties. The Company lacks insight into those settlements, retains legal counsel separate from the other parties, and was not involved in any manner with respect to those settlements. Events or factors that could assist the Company in estimating the amount of any potential civil penalty or a range of potential loss related to such penalties include (i) an assessment by the DOJ, (ii) a ruling by a court of competent jurisdiction, or (iii) the initiation of substantive settlement negotiations between the Company and the DOJ.

       Given the Company’s lack of direct operational involvement in the event, as confirmed by the Louisiana District Court, and the subjective criteria of the CWA, the Company believes that its exposure to CWA penalties will not materially impact the Company’s consolidated financial position, results of operations, or cash flows.

Civil Litigation Damage Claims    Numerous Deepwater Horizon event-related civil lawsuits have been filed against BP and other parties, including the Company. This litigation has been consolidated into a federal Multidistrict Litigation (MDL) action pending before Judge Carl Barbier in the Louisiana District Court. In March 2012, BP and the Plaintiffs’ Steering Committee entered into a tentative settlement agreement to resolve the substantial majority of economic loss and medical claims stemming from the Deepwater Horizon events, which the Louisiana District Court approved in orders issued in December 2012 and January 2013. Only OPA claims seeking economic loss damages against the Company remain. In addition, certain state and local governments have appealed, or have provided indication of a likely appeal of, the MDL court’s decision that only federal law, and not state law, applies to Deepwater Horizon event-related claims. The Company, pursuant to the Settlement Agreement, is fully indemnified by BP against losses arising as a result of claims for damages, irrespective of whether such claims are based on federal (including OPA) or state law.

       The first phase of the trial in the proceeding filed in the MDL by Transocean Ltd. (Transocean) under the Limitation of Liability Act commenced in February 2013 (Phase I). In April 2013, the evidence closed and all parties rested. Findings of fact, post-trial briefs, and responsive briefs were submitted in July 2013. BP, BP p.l.c., the United States, state and local governments, Halliburton Energy Services, Inc. (Halliburton), and Transocean participated in Phase I of the trial. Anadarko was excused from participation in Phase I of the trial. The issues tried in Phase I include the cause of the blow-out and all related events leading up to April 22, 2010, the date the Deepwater Horizon sank, as well as allocation of fault. The allocation of fault remains in the Phase I trial because Halliburton and Transocean have not settled with any of the parties and each wishes to prove to the court that their respective company was not at fault. The second phase of trial is expected to start in September 2013 (Phase II). The issues to be tried in Phase II are expected to include spill-source control and quantification of the spill for the period from April 22, 2010, until the well was capped. The Company, BP, BP p.l.c., the United States, state and local governments, Halliburton, and Transocean will participate in Phase II of the trial.    

17

ANADARKO PETROLEUM CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

12. Contingencies (Continued)

       Two separate class action complaints were filed in June and August 2010, in the U.S. District Court for the Southern District of New York (New York District Court) on behalf of purported purchasers of the Company’s stock between June 9, 2009, and June 12, 2010, against Anadarko and certain of its officers. The complaints allege causes of action arising pursuant to the Securities Exchange Act of 1934 for purported misstatements and omissions regarding, among other things, the Company’s liability related to the Deepwater Horizon events. In March 2012, the New York District Court granted the Lead Plaintiff’s motion to transfer venue to the U.S. District Court for the Southern District of Texas - Houston Division (Texas District Court). In May 2012, the Texas District Court granted the defendants’ motion to transfer the consolidated action within the district to Judge Keith P. Ellison. In July 2012, the plaintiffs filed their First Amended Consolidated Class Action Complaint. The defendants filed a renewed motion to dismiss in the Texas District Court in September 2012. In July 2013, the Texas District Court dismissed the claims relating to all but one of the alleged misstatements asserted in the plaintiffs’ complaint. The Texas District Court has given the plaintiffs 30 days to seek leave to amend the complaint to attempt to rehabilitate the claims that were dismissed.

       In September 2010, a purported shareholder made a demand on the Company’s Board of Directors (the Board) to investigate allegations of breaches of duty by members of management related to the Deepwater Horizon events. The Board received a supplemental demand letter from the shareholder in March 2012. The Board considered each of the demand letters in January 2011 and April 2012 and determined that it would not be in the best interest of the Company to pursue the issues alleged in the demand letters. In May 2013, a shareholder derivative petition was filed in the 215^th District Court of Harris County, Texas by the shareholder against Anadarko (as a nominal defendant) and certain current and former directors and officers. The petition alleges breach of fiduciary duties, unjust enrichment, abuse of control, and gross mismanagement in connection with the Deepwater Horizon events. The plaintiff seeks an unspecified amount of damages, certain changes to the Company’s governance and internal procedures, disgorgement of profits, and reimbursement of litigation fees and costs.

       Given the various stages of these matters, the Company currently cannot assess the probability of losses, or reasonably estimate a range of any potential losses, related to ongoing proceedings. The Company intends to vigorously defend itself, its officers, and its directors in each of these matters, and will avail itself of the indemnities provided by BP against civil damages.

Remaining Liability Outlook    It is reasonably possible that the Company may recognize additional Deepwater Horizon event-related liabilities for potential fines and penalties, shareholder claims, and certain other claims not covered by the indemnification provisions of the Settlement Agreement; however, the Company does not believe that any potential liability attributable to the foregoing items, individually or in the aggregate, will have a material impact on the Company’s consolidated financial position, results of operations, or cash flows. This assessment takes into account certain qualitative factors, including the subjective and fault-based nature of CWA penalties, the Company’s indemnification by BP against certain damage claims as discussed above, BP’s creditworthiness, the merits of the shareholder claims, and directors’ and officers’ insurance coverage related to outstanding shareholder claims.

       The Company will continue to monitor the MDL and other legal proceedings discussed above as well as federal investigations related to the Deepwater Horizon events. The Company cannot predict the nature of evidence that may be discovered during the course of legal proceedings or the timing of completion of any legal proceedings.

       Although the Company is fully indemnified by BP against OPA damage claims, NRD claims and assessment costs, and certain other potential liabilities, the Company may be required to recognize a liability for these amounts in advance of or in connection with recognizing a receivable from BP for the related indemnity payment. In all circumstances, however, the Company expects that any additional indemnified liability that may be recognized by the Company will be subsequently recovered from BP itself or through the guarantees of BPCNA or BP p.l.c.

18

ANADARKO PETROLEUM CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

12. Contingencies (Continued)

Tronox Litigation    In January 2009, Tronox Incorporated (Tronox), a former subsidiary of Kerr-McGee Corporation (Kerr-McGee), which is a current subsidiary of Anadarko, and certain of Tronox’s subsidiaries filed voluntary petitions for relief under Chapter 11 of the U.S. Bankruptcy Code in the U.S. Bankruptcy Court for the Southern District of New York. Subsequently, in May 2009, Tronox and certain of its affiliates filed a lawsuit against Anadarko and Kerr-McGee asserting a number of claims, including claims for actual and constructive fraudulent conveyance (Adversary Proceeding). Tronox alleges, among other things, that it was insolvent or undercapitalized at the time it was spun off from Kerr-McGee and seeks, among other things, to recover damages, including interest, in excess of $18.9 billion from Kerr-McGee and Anadarko, as well as litigation fees and costs. In accordance with Tronox’s Plan of Reorganization, the Adversary Proceeding is being pursued by the Anadarko Litigation Trust. Pursuant to the Anadarko Litigation Trust Agreement, the Anadarko Litigation Trust was “deemed substituted” for Tronox in the Adversary Proceeding as the party in such litigation. For purposes of this Form 10-Q, references to “Tronox” after February 2011 refer to the Anadarko Litigation Trust. For additional disclosure related to the Tronox Litigation, see Note 17—Contingencies—Tronox Litigation in the Notes to the Consolidated Financial Statements included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2012.

       The U.S. government was granted authority to intervene in the Adversary Proceeding, and in May 2009 asserted separate claims against Anadarko and Kerr-McGee under the Federal Debt Collection Procedures Act (FDCPA Complaint). Anadarko and Kerr-McGee moved to dismiss the claims of the U.S. government, but that motion has been stayed by the Bankruptcy Court. In April 2012, Anadarko and Kerr-McGee filed an answer to the FDCPA Complaint.

       In February 2012, the Company filed a motion for partial summary judgment seeking dismissal of several claims, including all actual and constructive fraudulent transfer claims protected by Section 546(e) of the Bankruptcy Code. The court has not yet ruled on that issue. Trial began in May 2012 and in September 2012, the evidence closed and both sides rested. In November 2012, the parties filed post-trial briefs and closing arguments were presented in December 2012. The parties filed final post-trial briefs in January 2013. The matter is pending before the court.

       The Company remains confident in the merits of its position and does not believe a loss resulting from litigating the Adversary Proceeding is probable. Accounting guidance requires that contingent losses be probable in nature for loss recognition to be appropriate. Accordingly, the Company’s Consolidated Balance Sheet at June 30, 2013, does not include a loss-contingency liability related to the litigation of the Adversary Proceeding.

       Although the Company does not consider a loss related to the litigation of the Adversary Proceeding to be probable, it is reasonably possible that the Company could incur a loss as a result of litigating this matter. Despite the plaintiffs’ damage claims in excess of $18.9 billion, the Company currently believes a reasonable range of potential loss is zero to $1.4 billion. The low end of the Company’s estimated range of potential loss is based on the Company’s current belief that it will more likely than not prevail in defending against the claims asserted in the Adversary Proceeding. The high end of the Company’s estimated range of potential loss represents the amount of consideration received by Kerr-McGee at the time of the Tronox spin-off, approximately $985 million, plus interest thereon.

       The Company’s estimated range of potential loss is based on the Company’s opinion regarding the current status of and likelihood of final resolution through litigation and could change as a result of developments in the Adversary Proceeding, or if the likelihood of settlement ceases to be remote. The Company’s ultimate financial obligation resulting from resolution of the Adversary Proceeding could vary, perhaps materially, from the Company’s above-stated estimated range of potential loss.

Other    During the second quarter of 2013, the Company recognized a pretax loss of $141 million, reported in other (income) expense, net in the Consolidated Statement of Income, related to the cost to decommission wells and production facilities previously sold to a third party. In June 2013, as a result of a Chapter 11 bankruptcy declaration by the third party, the U.S. Department of the Interior ordered Anadarko to perform the decommissioning of the facility and related wells. These wells and production facilities are no longer owned by the Company nor related to its current operations. Anadarko expects to complete decommissioning of the production facilities in 2014 and the wells in 2015. Decommissioning obligations of $56 million were included in accrued expenses and $85 million were included in other long-term liabilities in the Consolidated Balance Sheet at June 30, 2013. Actual costs may vary from this estimate; however, the Company does not believe that such variation will materially impact its consolidated financial position, results of operations, or cash flows.

19

ANADARKO PETROLEUM CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

13. Income Taxes

       The following summarizes income tax expense (benefit) and effective tax rates:

	Three Months Ended   June 30,						Six Months Ended   June 30,
millions except percentages	2013			2012			2013			2012
Income tax expense (benefit)	$	567		$	164		$	1,023		$	516
Effective tax rate	37		%	174		%	41		%	20		%

       The increase from the 35% U.S. federal statutory rate for the three and six months ended June 30, 2013, and the three months ended June 30, 2012, was primarily attributable to the tax impact from foreign operations and Algerian exceptional profits taxes.

       The decrease from the 35% U.S. federal statutory rate for the six months ended June 30, 2012, was primarily attributable to the non-taxable resolution of the Algeria exceptional profits tax dispute. This amount was partially offset by the tax impact from foreign operations and Algerian exceptional profits taxes.

14. Supplemental Cash Flow Information

       The following summarizes cash paid (received) for interest (net of amounts capitalized) and income taxes, as well as non-cash investing transactions:

	Six Months Ended   June 30,
millions	2013		2012
Cash paid (received)
Interest	$	313	$	354
Income taxes	$	103	$	(40	)
Non-cash investing activities
Fair value of properties and equipment received in non-cash exchange transactions	$	13	$	31

15. Segment Information

       Anadarko’s business segments are separately managed due to distinct operational differences and unique technology, distribution, and marketing requirements. The Company’s three reporting segments are oil and gas exploration and production, midstream, and marketing. The oil and gas exploration and production segment explores for and produces natural gas, crude oil, condensate, and NGLs. The midstream segment engages in gathering, processing, treating, and transporting Anadarko and third-party oil, natural-gas, and NGLs production. The midstream reporting segment consists of two operating segments, WES and other midstream, which are aggregated into one reporting segment due to similar financial and operating characteristics. The marketing segment sells much of Anadarko’s production, as well as third-party purchased volumes.

20

ANADARKO PETROLEUM CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

15. Segment Information (Continued)

       To assess the performance of Anadarko’s operating segments, the chief operating decision maker analyzes Adjusted EBITDAX. The Company defines Adjusted EBITDAX as income (loss) before income taxes; exploration expense; depreciation, depletion, and amortization (DD&A); impairments; interest expense; unrealized (gains) losses on derivatives, net; realized (gains) losses on interest-rate and other derivatives, net; and certain items not related to the Company’s normal operations, less net income attributable to noncontrolling interests. During the periods presented, these items included Deepwater Horizon settlement and related costs, Algeria exceptional profits tax settlement, Tronox-related contingent loss, and certain other nonoperating items included in other (income) expense, net. The Company’s definition of Adjusted EBITDAX excludes exploration expense, as it is not an indicator of operating efficiency for a given reporting period. However, exploration expense is monitored by management as part of costs incurred in exploration and development activities. Similarly, DD&A and impairments are excluded from Adjusted EBITDAX as a measure of segment operating performance because capital expenditures are evaluated at the time capital costs are incurred. Adjusted EBITDAX also excludes interest expense to allow for assessment of segment operating results without regard to Anadarko’s financing methods or capital structure. Finally, unrealized (gains) losses on derivatives, net and realized (gains) losses on interest-rate and other derivatives, net are excluded from Adjusted EBITDAX because these (gains) losses are not considered a measure of asset operating performance. Management believes that the presentation of Adjusted EBITDAX provides information useful in assessing the Company’s financial condition and results of operations and that Adjusted EBITDAX is a widely accepted financial indicator of a company’s ability to incur and service debt, fund capital expenditures, and make distributions to stockholders.

       Adjusted EBITDAX, as defined by Anadarko, may not be comparable to similarly titled measures used by other companies and should be considered in conjunction with net income (loss) attributable to common stockholders and other performance measures, such as operating income or cash flows from operating activities. Below is a reconciliation of consolidated Adjusted EBITDAX to income (loss) before income taxes:

	Three Months Ended   June 30,						Six Months Ended   June 30,
millions	2013			2012			2013			2012
Income (loss) before income taxes	$	1,526		$	94		$	2,466		$	2,629
Exploration expense	178			1,121			442			1,365
DD&A	940			1,027			1,962			1,957
Impairments	10			112			39			162
Interest expense	172			190			336			376
Unrealized (gains) losses on derivatives, net	(641		)	225			(395		)	83
Realized (gains) losses on interest-rate and other derivatives, net	—			2			—			2
Deepwater Horizon settlement and related costs	4			3			7			11
Algeria exceptional profits tax settlement	—			—			33			(1,804		)
Tronox-related contingent loss	—			(525		)	—			(250		)
Certain other nonoperating items	85			—			85			—
Less net income attributable to noncontrolling interests	30			19			54			46
Consolidated Adjusted EBITDAX	$	2,244		$	2,230		$	4,921		$	4,485

21

ANADARKO PETROLEUM CORPORATION

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

(Unaudited)

15. Segment Information (Continued)

       Information presented below as “Other and Intersegment Eliminations” includes results from hard-minerals royalty arrangements and corporate, financing, and certain hedging activities. The following summarizes selected financial information for Anadarko’s reporting segments:

	Oil and Gas							Other and
	Exploration							Intersegment
millions	& Production		Midstream		Marketing			Eliminations			Total
Three Months Ended June 30, 2013
Sales revenues	$	1,587	$	88	$	1,765		$	—		$	3,440
Intersegment revenues	1,526		265		(1,639		)	(152		)	—
Gains (losses) on divestitures and other, net	1		—		—			56			57
Total revenues and other	3,114		353		126			(96		)	3,497
Operating costs and expenses (1)	845		209		164			7			1,225
Realized (gains) losses on commodity    derivatives, net	—		—		—			(21		)	(21		)
Other (income) expense, net (2)	—		—		—			13			13
Net income attributable to noncontrolling interests	—		30		—			—			30