v2.4.0.6

Supplemental Information On Oil And Gas Operations (Tables)

12 Months Ended

Dec. 31, 2011

Supplemental Information On Oil And Gas Operations [Abstract]

Costs Incurred

	Year Ended December 31, 2011
	U.S. Onshore	U.S. Offshore	Total U.S.	Canada	North America
	(In millions)
Property acquisition costs:
Proved properties	$         34	$          —	$         34	$         14	$         48
Unproved properties	851	—	851	88	939
Exploration costs	272	—	272	266	538
Development costs	4,130	—	4,130	1,288	5,418
Costs incurred	$    5,287	$         —	$    5,287	$    1,656	$    6,943

	Year Ended December 31, 2010
	U.S. Onshore	U.S. Offshore	Total U.S.	Canada	North America
	(In millions)
Property acquisition costs:
Proved properties	$         29	$          —	$         29	$            4	$         33
Unproved properties	592	2	594	590	1,184
Exploration costs	339	89	428	260	688
Development costs	3,126	297	3,423	1,216	4,639
Costs incurred	$    4,086	$       388	$    4,474	$    2,070	$    6,544

	Year Ended December 31, 2009
	U.S. Onshore	U.S. Offshore	Total U.S.	Canada	North America
	(In millions)
Property acquisition costs:
Proved properties	$         17	$          —	$         17	$         18	$         35
Unproved properties	52	11	63	72	135
Exploration costs	122	260	382	152	534
Development costs	2,011	537	2,548	835	3,383
Costs incurred	$    2,202	$       808	$    3,010	$    1,077	$    4,087

Capitalized Costs

	December 31, 2011
	U.S	Canada	North America
	(In millions)
Proved properties	$   41,397	$   20,299	$   61,696
Unproved properties	2,347	1,635	3,982
Total oil & gas properties	43,744	21,934	65,678
Accumulated DD&A	(29,742)	(14,585)	(44,327)
Net capitalized costs	$   14,002	$     7,349	$   21,351

	December 31, 2010
	U.S	Canada	North America
	(In millions)
Proved properties	$   36,301	$   19,711	$   56,012
Unproved properties	2,156	1,278	3,434
Total oil & gas properties	38,457	20,989	59,446
Accumulated DD&A	(28,546)	(14,130)	(42,676)
Net capitalized costs	$     9,911	$     6,859	$   16,770

Oil And Gas Properties Not Subject To Amortization

		Costs Incurred In
		2011	2010	2009	Prior to 2009	Total
		(In millions)
Acquisition costs		$       894	$    1,101	$       112	$    1,037	$    3,144
Exploration costs		234	81	6	11	332
Development costs		359	72	1	9	441
Capitalized interest		43	22	—	—	65
Total oil and gas properties not subject to amortization		$    1,530	$    1,276	$       119	$    1,057	$    3,982

Results Of Operations

	Year Ended December 31, 2011
	United States	Canada	North America
	(In millions)
Oil, gas and NGL sales	$     5,418	$     2,897	$     8,315
Lease operating expenses	(925)	(926)	(1,851)
Depreciation, depletion and amortization	(1,201)	(786)	(1,987)
General and administrative expenses	(132)	(119)	(251)
Taxes other than income taxes	(357)	(45)	(402)
Accretion of asset retirement obligations	(34)	(57)	(91)
Income tax expense	(1,005)	(250)	(1,255)
Results of operations	$     1,764	$         714	$     2,478
Depreciation, depletion and amortization per Boe	$        6.94	$     11.74	$        8.28

	Year Ended December 31, 2010
	United States	Canada	North America
	(In millions)
Oil, gas and NGL sales	$     4,742	$     2,520	$     7,262
Lease operating expenses	(892)	(797)	(1,689)
Depreciation, depletion and amortization	(998)	(677)	(1,675)
General and administrative expenses	(133)	(83)	(216)
Taxes other than income taxes	(319)	(40)	(359)
Accretion of asset retirement obligations	(42)	(50)	(92)
Income tax expense	(849)	(246)	(1,095)
Results of operations	$     1,509	$         627	$     2,136
Depreciation, depletion and amortization per Boe	$        6.11	$     10.51	$        7.36

	Year Ended December 31, 2009
	United States	Canada	North America
	(In millions)
Oil, gas and NGL sales	$     3,958	$     2,139	$     6,097
Lease operating expenses	(997)	(673)	(1,670)
Depreciation, depletion and amortization	(1,247)	(585)	(1,832)
General and administrative expenses	(145)	(74)	(219)
Taxes other than income taxes	(258)	(35)	(293)
Reduction of carrying value of oil and gas properties	(6,408)	—	(6,408)
Accretion of asset retirement obligations	(53)	(38)	(91)
Income tax benefit	1,800	(210)	1,580
Results of operations	$    (3,350)	$         524	$    (2,836)
Depreciation, depletion and amortization per Boe	$        7.47	$        8.84	$        7.86

Proved Reserves

	Oil (MMBbls)
	U.S. Onshore	U.S. Offshore	Total U.S.	Canada	North America
Proved developed and undeveloped reserves:
December 31, 2008	133	34	167	134	301
Revisions due to prices	9	2	11	291	302
Revisions other than price	—	1	1	(8)	(7)
Extensions and discoveries	9	2	11	122	133
Production	(12)	(5)	(17)	(25)	(42)
Sale of reserves	—	(1)	(1)	—	(1)
December 31, 2009	139	33	172	514	686
Revisions due to prices	4	1	5	(24)	(19)
Revisions other than price	2	2	4	9	13
Extensions and discoveries	19	1	20	59	79
Production	(14)	(2)	(16)	(25)	(41)
Sale of reserves	(2)	(35)	(37)	—	(37)
December 31, 2010	148	—	148	533	681
Revisions due to prices	2	—	2	(15)	(13)
Revisions other than price	(1)	—	(1)	11	10
Extensions and discoveries	36	—	36	36	72
Production	(17)	—	(17)	(28)	(45)
December 31, 2011	168	—	168	537	705
Proved developed reserves as of:
December 31, 2008	111	22	133	110	243
December 31, 2009	119	21	140	149	289
December 31, 2010	131	—	131	126	257
December 31, 2011	146	—	146	163	309
Proved developed-producing reserves as of:
December 31, 2008	103	9	112	91	203
December 31, 2009	112	12	124	137	261
December 31, 2010	123		123	116	239
December 31, 2011	139	—	139	155	294
Proved undeveloped reserves as of:
December 31, 2008	22	12	34	24	58
December 31, 2009	20	12	32	365	397
December 31, 2010	17	—	17	407	424
December 31, 2011	22	—	22	374	396

	Gas (Bcf)
	U.S. Onshore	U.S. Offshore	Total U.S.	Canada	North America
Proved developed and undeveloped reserves:
December 31, 2008	7,979	390	8,369	1,510	9,879
Revisions due to prices	(661)	(4)	(665)	(29)	(694)
Revisions other than price	119	(62)	57	(14)	43
Extensions and discoveries	1,387	64	1,451	67	1,518
Purchase of reserves	1	—	1	6	7
Production	(698)	(45)	(743)	(223)	(966)
Sale of reserves	—	(1)	(1)	(29)	(30)
December 31, 2009	8,127	342	8,469	1,288	9,757
Revisions due to prices	449	2	451	21	472
Revisions other than price	105	(26)	79	(17)	62
Extensions and discoveries	1,088	7	1,095	131	1,226
Purchase of reserves	12	—	12	9	21
Production	(699)	(17)	(716)	(214)	(930)
Sale of reserves	(17)	(308)	(325)	—	(325)
December 31, 2010	9,065	—	9,065	1,218	10,283
Revisions due to prices	(1)	—	(1)	(60)	(61)
Revisions other than price	(243)	—	(243)	(38)	(281)
Extensions and discoveries	1,410	—	1,410	58	1,468
Purchase of reserves	16	—	16	20	36
Production	(740)	—	(740)	(213)	(953)
Sale of reserves	—	—	—	(6)	(6)
December 31, 2011	9,507	—	9,507	979	10,486
Proved developed reserves as of:
December 31, 2008	6,469	212	6,681	1,357	8,038
December 31, 2009	6,447	185	6,632	1,213	7,845
December 31, 2010	7,280	—	7,280	1,144	8,424
December 31, 2011	7,957	—	7,957	951	8,908
Proved developed-producing reserves as of:
December 31, 2008	5,787	64	5,851	1,194	7,045
December 31, 2009	5,860	137	5,997	1,075	7,072
December 31, 2010	6,702	—	6,702	1,031	7,733
December 31, 2011	7,409	—	7,409	862	8,271
Proved undeveloped reserves as of:
December 31, 2008	1,510	178	1,688	153	1,841
December 31, 2009	1,680	157	1,837	75	1,912
December 31, 2010	1,785	—	1,785	74	1,859
December 31, 2011	1,550	—	1,550	28	1,578

	Natural Gas Liquids (MMBbls)
	U.S. Onshore	U.S. Offshore	Total U.S.	Canada	North America
Proved developed and undeveloped reserves:
December 31, 2008	315	2	317	35	352
Revisions due to prices	(11)	—	(11)	2	(9)
Revisions other than price	36	1	37	—	37
Extensions and discoveries	70	—	70	1	71
Production	(25)	(1)	(26)	(4)	(30)
December 31, 2009	385	2	387	34	421
Revisions due to prices	14	—	14	(1)	13
Revisions other than price	13	3	16	(1)	15
Extensions and discoveries	68	—	68	2	70
Production	(28)	—	(28)	(4)	(32)
Sale of reserves	(3)	(5)	(8)	—	(8)
December 31, 2010	449	—	449	30	479
Revisions due to prices	4	—	4	(1)	3
Revisions other than price	1	—	1	—	1
Extensions and discoveries	102	—	102	2	104
Purchase of reserves	2	—	2	—	2
Production	(33)	—	(33)	(4)	(37)
December 31, 2011	525	—	525	27	552
Proved developed reserves as of:
December 31, 2008	260	1	261	31	292
December 31, 2009	293	1	294	32	326
December 31, 2010	353	—	353	28	381
December 31, 2011	402	—	402	26	428
Proved developed-producing reserves as of:
December 31, 2008	230	—	230	29	259
December 31, 2009	265	1	266	28	294
December 31, 2010	318	—	318	26	344
December 31, 2011	372	—	372	24	396
Proved undeveloped reserves as of:
December 31, 2008	55	1	56	4	60
December 31, 2009	92	1	93	2	95
December 31, 2010	96	—	96	2	98
December 31, 2011	123	—	123	1	124

	Total (MMBoe) (1)
	U.S. Onshore	U.S. Offshore	Total U.S.	Canada	North America
Proved developed and undeveloped reserves:
December 31, 2008	1,777	101	1,878	421	2,299
Revisions due to prices	(113)	1	(112)	289	177
Revisions other than price	57	(8)	49	(11)	38
Extensions and discoveries	311	12	323	135	458
Purchase of reserves	—	—	—	1	1
Production	(154)	(13)	(167)	(66)	(233)
Sale of reserves	—	(1)	(1)	(6)	(7)
December 31, 2009	1,878	92	1,970	763	2,733
Revisions due to prices	92	1	93	(21)	72
Revisions other than price	32	1	33	5	38
Extensions and discoveries	269	2	271	83	354
Purchase of reserves	2	—	2	2	4
Production	(158)	(5)	(163)	(65)	(228)
Sale of reserves	(8)	(91)	(99)	(1)	(100)
December 31, 2010	2,107	—	2,107	766	2,873
Revisions due to prices	6	—	6	(27)	(21)
Revisions other than price	(41)	—	(41)	6	(35)
Extensions and discoveries	374	—	374	47	421
Purchase of reserves	5	—	5	3	8
Production	(173)	—	(173)	(67)	(240)
Sale of reserves	—	—	—	(1)	(1)
December 31, 2011	2,278	—	2,278	727	3,005
Proved developed reserves as of:
December 31, 2008	1,449	59	1,508	367	1,875
December 31, 2009	1,486	53	1,539	383	1,922
December 31, 2010	1,696	—	1,696	346	2,042
December 31, 2011	1,875	—	1,875	348	2,223
Proved developed-producing reserves as of:
December 31, 2008	1,298	20	1,318	319	1,637
December 31, 2009	1,354	35	1,389	344	1,733
December 31, 2010	1,557	—	1,557	314	1,871
December 31, 2011	1,746	—	1,746	323	2,069
Proved undeveloped reserves as of:
December 31, 2008	328	42	370	54	424
December 31, 2009	392	39	431	380	811
December 31, 2010	411	—	411	420	831
December 31, 2011	403	—	403	379	782

____________________________

(1)   Gas reserves are converted to Boe at the rate of six Mcf per Bbl of oil, based upon the approximate relative energy content of gas and oil. This rate is not necessarily indicative of the relationship of natural gas and oil prices. Natural gas liquids reserves are converted to Boe on a one-to-one basis with oil.

Proved Undeveloped Reserves

	U.S. Onshore	Canada	North America
Proved undeveloped reserves as of December 31, 2010	411	420	831
Extensions and discoveries	118	30	148
Revisions due to prices	(2)	(14)	(16)
Revisions other than price	(56)	5	(51)
Conversion to proved developed reserves	(68)	(62)	(130)
Proved undeveloped reserves as of December 31, 2011	403	379	782

Standardized Measure Of Discounted Future Net Cash Flows Related To Interest In Proved Reserves

	Year Ended December 31, 2011
	U.S	Canada	North America
	(In millions)
Future cash inflows	$   69,305	$   36,786	$ 106,091
Future costs:
Development	(6,817)	(4,678)	(11,495)
Production	(26,217)	(15,063)	(41,280)
Future income tax expense	(11,432)	(3,763)	(15,195)
Future net cash flows	24,839	13,282	38,121
10% discount to reflect timing of cash flows	(13,492)	(6,785)	(20,277)
Standardized measure of discounted future net cash flows	$   11,347	$     6,497	$   17,844

	Year Ended December 31, 2010
	U.S	Canada	North America
	(In millions)
Future cash inflows	$   58,093	$   35,948	$   94,041
Future costs:
Development	(6,220)	(4,526)	(10,746)
Production	(24,223)	(12,249)	(36,472)
Future income tax expense	(8,643)	(4,209)	(12,852)
Future net cash flows	19,007	14,964	33,971
10% discount to reflect timing of cash flows	(10,164)	(7,455)	(17,619)
Standardized measure of discounted future net cash flows	$     8,843	$     7,509	$   16,352
	Year Ended December 31, 2009
	U.S	Canada	North America
	(In millions)
Future cash inflows	$   44,571	$   28,442	$   73,013
Future costs:
Development	(6,814)	(4,132)	(10,946)
Production	(22,184)	(9,847)	(32,031)
Future income tax expense	(3,572)	(3,408)	(6,980)
Future net cash flows	12,001	11,055	23,056
10% discount to reflect timing of cash flows	(6,121)	(5,532)	(11,653)
Standardized measure of discounted future net cash flows	$     5,880	$     5,523	$   11,403

Schedule Of Principal Changes In The Standardized Measure Of Discounted Future Net Cash Flows Attributable To Proved Reserves

	Year Ended December 31,
	2011	2010	2009
	(In millions)
Beginning balance	$   16,352	$   11,403	$     9,393
Oil, gas and NGL sales, net of production costs	(5,794)	(4,982)	(3,915)
Net changes in prices and production costs	1,875	7,423	(1,672)
Extensions and discoveries, net of future development costs	3,714	3,048	2,378
Purchase of reserves, net of future development costs	57	23	6
Development costs incurred that reduced future development costs..	1,302	1,559	1,012
Revisions of quantity estimates	(668)	287	4,051
Sales of reserves in place	(2)	(815)	(37)
Accretion of discount	2,248	1,487	1,281
Net change in income taxes	(929)	(2,663)	(51)
Other, primarily changes in timing and foreign exchange rates	(311)	(418)	(1,043)
Ending balance	$   17,844	$   16,352	$   11,403

Estimated Pretax Cash Flow Information Related To Proved Reserves

	Year Ended December 31, 2011
	U.S	Canada	North America
Pre-Tax Future Net Revenue (1)	(In millions)
Proved Developed Reserves	$   30,473	$     7,757	$   38,230
Proved Undeveloped Reserves	5,798	9,288	15,086
Total Proved Reserves	$   36,271	$   17,045	$   53,316

Pre-Tax 10% Present Value (1)
Proved Developed Reserves	$   15,165	$     5,830	$   20,995
Proved Undeveloped Reserves	1,404	2,508	3,912
Total Proved Reserves	$   16,569	$     8,338	$   24,907

____________________________

(1)   Estimated pre-tax future net revenue represents estimated future revenue to be generated from the production of proved reserves, net of estimated production and development costs and site restoration and abandonment charges. The amounts shown do not give effect to depreciation, depletion and amortization, or to non-property related expenses such as debt service and income tax expense.

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