v2.4.0.6

Oil and Gas Exploration and Production Industries Disclosures (Tables) | 12 Months Ended
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Dec. 31, 2012
Oil and Gas Exploration and Production Industries Disclosures [Abstract] |
Net Proved and Proved Developed Oil and Gas Reserve Quantities [Table Text Block] | The following tables set forth EOG's net proved and proved developed reserves at December 31 for each of the four years in the period ended December 31, 2012, and the changes in the net proved reserves for each of the three years in the period ended December 31, 2012, as estimated by the Engineering and Acquisitions Department of EOG: NET PROVED AND PROVED DEVELOPED RESERVE SUMMARY
| United |  |  |  |  |  | Other |  |
| States |  | Canada |  | Trinidad |  | International (1) |  | Total
NET PROVED RESERVES |  |  |  |  |  |  |  |  |
Crude Oil (MBbl) (2) |  |  |  |  |  |  |  |  |
Net proved reserves at December 31, 2009 | 188,452 |  | 25,586 |  | 5,443 |  | 58 |  | 219,539
| Revisions of previous estimates | (8,313) |  | (104) |  | (754) |  | 20 |  | (9,151)
| Purchases in place | 13 |  | - |  | - |  | - |  | 13
| Extensions, discoveries and other additions | 199,479 |  | 3,198 |  | 1,751 |  | 48 |  | 204,476
| Sales in place | (1,082) |  | (589) |  | - |  | - |  | (1,671)
| Production | (23,092) |  | (2,455) |  | (1,709) |  | (28) |  | (27,284)
Net proved reserves at December 31, 2010 | 355,457 |  | 25,636 |  | 4,731 |  | 98 |  | 385,922
| Revisions of previous estimates | (21,188) |  | (4,611) |  | 18 |  | 25 |  | (25,756)
| Purchases in place | 9 |  | - |  | - |  | - |  | 9
| Extensions, discoveries and other additions | 202,552 |  | 449 |  | - |  | - |  | 203,001
| Sales in place | (4,301) |  | - |  | - |  | - |  | (4,301)
| Production | (37,233) |  | (2,882) |  | (1,242) |  | (25) |  | (41,382)
Net proved reserves at December 31, 2011 | 495,296 |  | 18,592 |  | 3,507 |  | 98 |  | 517,493
| Revisions of previous estimates | 4,105 |  | (2,493) |  | 71 |  | 5 |  | 1,688
| Purchases in place | 1,010 |  | - |  | - |  | - |  | 1,010
| Extensions, discoveries and other additions | 241,171 |  | 5,681 |  | - |  | 8,834 |  | 255,686
| Sales in place | (15,921) |  | (1,343) |  | - |  | - |  | (17,264)
| Production | (54,632) |  | (2,574) |  | (550) |  | (39) |  | (57,795)
Net proved reserves at December 31, 2012 | 671,029 |  | 17,863 |  | 3,028 |  | 8,898 |  | 700,818
Natural Gas Liquids (MBbl) (2) |  |  |  |  |  |  |  |  |
Net proved reserves at December 31, 2009 | 91,489 |  | 1,972 |  | - |  | - |  | 93,461
| Revisions of previous estimates | 27,490 |  | (196) |  | - |  | - |  | 27,294
| Purchases in place | - |  | - |  | - |  | - |  | -
| Extensions, discoveries and other additions | 42,221 |  | 21 |  | - |  | - |  | 42,242
| Sales in place | (2) |  | (6) |  | - |  | - |  | (8)
| Production | (10,764) |  | (316) |  | - |  | - |  | (11,080)
Net proved reserves at December 31, 2010 | 150,434 |  | 1,475 |  | - |  | - |  | 151,909
| Revisions of previous estimates | 35,999 |  | 43 |  | - |  | - |  | 36,042
| Purchases in place | 17 |  | - |  | - |  | - |  | 17
| Extensions, discoveries and other additions | 65,288 |  | - |  | - |  | - |  | 65,288
| Sales in place | (10,008) |  | - |  | - |  | - |  | (10,008)
| Production | (15,144) |  | (316) |  | - |  | - |  | (15,460)
Net proved reserves at December 31, 2011 | 226,586 |  | 1,202 |  | - |  | - |  | 227,788
| Revisions of previous estimates | 47,293 |  | 563 |  | - |  | - |  | 47,856
| Purchases in place | 612 |  | - |  | - |  | - |  | 612
| Extensions, discoveries and other additions | 71,396 |  | 178 |  | - |  | - |  | 71,574
| Sales in place | (7,300) |  | (77) |  | - |  | - |  | (7,377)
| Production | (20,181) |  | (309) |  | - |  | - |  | (20,490)
Net proved reserves at December 31, 2012 | 318,406 |  | 1,557 |  | - |  | - |  | 319,963
EOG RESOURCES, INC. SUPPLEMENTAL INFORMATION TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)
| United |  |  |  |  |  | Other |  |
| States |  | Canada |  | Trinidad |  | International (1) |  | Total
Natural Gas (Bcf) (3) |  |  |  |  |  |  |  |  |
Net proved reserves at December 31, 2009 | 6,350.1 |  | 1,549.5 |  | 985.8 |  | 12.7 |  | 8,898.1
| Revisions of previous estimates | (222.7) |  | (29.9) |  | (88.6) |  | 1.9 |  | (339.3)
| Purchases in place | - |  | - |  | - |  | - |  | -
| Extensions, discoveries and other additions | 821.3 |  | 3.4 |  | 63.0 |  | 7.9 |  | 895.6
| Sales in place | (34.6) |  | (316.2) |  | - |  | - |  | (350.8)
| Production | (422.6) |  | (73.0) |  | (132.6) |  | (5.2) |  | (633.4)
Net proved reserves at December 31, 2010 | 6,491.5 |  | 1,133.8 |  | 827.6 |  | 17.3 |  | 8,470.2
| Revisions of previous estimates | (344.0) |  | (49.8) |  | (24.2) |  | 1.3 |  | (416.7)
| Purchases in place | 3.0 |  | - |  | - |  | - |  | 3.0
| Extensions, discoveries and other additions | 634.6 |  | - |  | 74.7 |  | 4.5 |  | 713.8
| Sales in place | (323.6) |  | - |  | - |  | - |  | (323.6)
| Production | (415.7) |  | (48.1) |  | (127.4) |  | (4.6) |  | (595.8)
Net proved reserves at December 31, 2011 | 6,045.8 |  | 1,035.9 |  | 750.7 |  | 18.5 |  | 7,850.9
| Revisions of previous estimates | (1,736.0) |  | (894.5) |  | (24.1) |  | 1.6 |  | (2,653.0)
| Purchases in place | 14.8 |  | - |  | - |  | - |  | 14.8
| Extensions, discoveries and other additions | 477.8 |  | - |  | - |  | 0.3 |  | 478.1
| Sales in place | (386.2) |  | (8.5) |  | - |  | - |  | (394.7)
| Production | (380.2) |  | (34.6) |  | (138.4) |  | (3.4) |  | (556.6)
Net proved reserves at December 31, 2012 | 4,036.0 |  | 98.3 |  | 588.2 |  | 17.0 |  | 4,739.5
Oil Equivalents (MBoe) (2) |  |  |  |  |  |  |  |  |
Net proved reserves at December 31, 2009 | 1,338,292 |  | 285,808 |  | 169,747 |  | 2,172 |  | 1,796,019
| Revisions of previous estimates | (17,945) |  | (5,288) |  | (15,513) |  | 342 |  | (38,404)
| Purchases in place | 14 |  | - |  | - |  | - |  | 14
| Extensions, discoveries and other additions | 378,582 |  | 3,789 |  | 12,250 |  | 1,363 |  | 395,984
| Sales in place | (6,860) |  | (53,288) |  | - |  | - |  | (60,148)
| Production | (104,277) |  | (14,937) |  | (23,815) |  | (901) |  | (143,930)
Net proved reserves at December 31, 2010 | 1,587,806 |  | 216,084 |  | 142,669 |  | 2,976 |  | 1,949,535
| Revisions of previous estimates | (42,526) |  | (12,865) |  | (4,011) |  | 239 |  | (59,163)
| Purchases in place | 521 |  | - |  | - |  | - |  | 521
| Extensions, discoveries and other additions | 373,602 |  | 448 |  | 12,455 |  | 750 |  | 387,255
| Sales in place | (68,247) |  | - |  | - |  | - |  | (68,247)
| Production | (121,648) |  | (11,219) |  | (22,484) |  | (787) |  | (156,138)
Net proved reserves at December 31, 2011 | 1,729,508 |  | 192,448 |  | 128,629 |  | 3,178 |  | 2,053,763
| Revisions of previous estimates | (237,936) |  | (151,015) |  | (3,953) |  | 283 |  | (392,621)
| Purchases in place | 4,098 |  | - |  | - |  | - |  | 4,098
| Extensions, discoveries and other additions | 392,196 |  | 5,860 |  | - |  | 8,876 |  | 406,932
| Sales in place | (87,588) |  | (2,832) |  | - |  | - |  | (90,420)
| Production | (138,170) |  | (8,657) |  | (23,616) |  | (611) |  | (171,054)
Net proved reserves at December 31, 2012 | 1,662,108 |  | 35,804 |  | 101,060 |  | 11,726 |  | 1,810,698
(1) | Other International includes EOG's United Kingdom, China and Argentina operations.
(2) | Thousand barrels or thousand barrels of oil equivalent, as applicable; oil equivalents include crude oil and condensate, NGLs and natural gas. Oil equivalents are determined using the ratio of 1.0 barrel of crude oil and condensate or NGLs to 6.0 thousand cubic feet of natural gas.
(3) | Billion cubic feet.
Net Proved Developed and Net Proved Undeveloped Oil and Gas Reserve Quantities [Table Text Block] |
| United |  |  |  |  |  | Other |  |
| States |  | Canada |  | Trinidad |  | International (1) |  | Total
NET PROVED DEVELOPED RESERVES |  |  |  |  |  |  |  |  |
Liquids (MBbl) |  |  |  |  |  |  |  |  |
| December 31, 2009 | 189,322 |  | 10,831 |  | 3,966 |  | 58 |  | 204,177
| December 31, 2010 | 253,308 |  | 12,758 |  | 3,853 |  | 98 |  | 270,017
| December 31, 2011 | 338,144 |  | 9,220 |  | 2,657 |  | 97 |  | 350,118
| December 31, 2012 | 442,648 |  | 7,963 |  | 2,378 |  | 253 |  | 453,242
Natural Gas (Bcf) |  |  |  |  |  |  |  |  |
| December 31, 2009 | 3,330.1 |  | 681.0 |  | 609.4 |  | 12.7 |  | 4,633.2
| December 31, 2010 | 3,519.7 |  | 401.6 |  | 519.2 |  | 17.3 |  | 4,457.8
| December 31, 2011 | 3,234.9 |  | 295.8 |  | 606.3 |  | 18.6 |  | 4,155.6
| December 31, 2012 | 2,387.5 |  | 98.3 |  | 476.7 |  | 17.0 |  | 2,979.5
Oil Equivalents (MBoe) |  |  |  |  |  |  |  |  |
| December 31, 2009 | 744,339 |  | 124,323 |  | 105,540 |  | 2,172 |  | 976,374
| December 31, 2010 | 839,928 |  | 79,701 |  | 90,382 |  | 2,976 |  | 1,012,987
| December 31, 2011 | 877,301 |  | 58,524 |  | 103,710 |  | 3,178 |  | 1,042,713
| December 31, 2012 | 840,564 |  | 24,348 |  | 81,826 |  | 3,081 |  | 949,819
NET PROVED UNDEVELOPED RESERVES |  |  |  |  |  |  |  |  |
Liquids (MBbl) |  |  |  |  |  |  |  |  |
| December 31, 2009 | 90,619 |  | 16,727 |  | 1,477 |  | - |  | 108,823
| December 31, 2010 | 252,583 |  | 14,352 |  | 879 |  | - |  | 267,814
| December 31, 2011 | 383,739 |  | 10,574 |  | 850 |  | - |  | 395,163
| December 31, 2012 | 546,786 |  | 11,456 |  | 651 |  | 8,645 |  | 567,538
Natural Gas (Bcf) |  |  |  |  |  |  |  |  |
| December 31, 2009 | 3,020.0 |  | 868.5 |  | 376.4 |  | - |  | 4,264.9
| December 31, 2010 | 2,971.7 |  | 732.2 |  | 308.5 |  | - |  | 4,012.4
| December 31, 2011 | 2,810.8 |  | 740.1 |  | 144.4 |  | - |  | 3,695.3
| December 31, 2012 | 1,648.5 |  | - |  | 111.5 |  | - |  | 1,760.0
Oil Equivalents (MBoe) |  |  |  |  |  |  |  |  |
| December 31, 2009 | 593,953 |  | 161,486 |  | 64,207 |  | - |  | 819,646
| December 31, 2010 | 747,878 |  | 136,383 |  | 52,287 |  | - |  | 936,548
| December 31, 2011 | 852,207 |  | 133,924 |  | 24,919 |  | - |  | 1,011,050
| December 31, 2012 | 821,544 |  | 11,456 |  | 19,234 |  | 8,645 |  | 860,879
(1) | Other International includes EOG's United Kingdom, China and Argentina operations.
Capitalized Costs Relating to Oil an d Gas Producing Activities | Capitalized Costs Relating to Oil and Gas Producing Activities. The following table sets forth the capitalized costs relating to EOG's crude oil and natural gas producing activities at December 31, 2012 and 2011:
|  | 2012 |  | 2011
Proved properties | $ | 36,872,434 | $ | 32,353,380
Unproved properties |  | 1,253,864 |  | 1,311,055
| Total |  | 38,126,298 |  | 33,664,435
Accumulated depreciation, depletion and amortization |  | (16,849,068) |  | (13,981,143)
| Net capitalized costs | $ | 21,277,230 | $ | 19,683,292
Costs Incurred in Oil and Gas Property Acquisition, Exploration and Development Activities | The following table sets forth costs incurred related to EOG's oil and gas activities for the years ended December 31, 2012, 2011 and 2010:
|  | United |  |  |  |  |  | Other |  |
|  | States |  | Canada |  | Trinidad |  | International (1) |  | Total
2012 |  |  |  |  |  |  |  |  |  |
Acquisition Costs of Properties |  |  |  |  |  |  |  |  |  |
| Unproved | $ | 471,345 | $ | 33,561 | $ | 1,000 | $ | (603) | $ | 505,303
| Proved |  | 739 |  | - |  | - |  | - |  | 739
|  | Subtotal |  | 472,084 |  | 33,561 |  | 1,000 |  | (603) |  | 506,042
Exploration Costs |  | 333,534 |  | 38,530 |  | 19,555 |  | 53,979 |  | 445,598
Development Costs (2) |  | 5,657,378 |  | 278,995 |  | 32,609 |  | 147,568 |  | 6,116,550
|  | Total | $ | 6,462,996 | $ | 351,086 | $ | 53,164 | $ | 200,944 | $ | 7,068,190
2011 |  |  |  |  |  |  |  |  |  |
Acquisition Costs of Properties |  |  |  |  |  |  |  |  |  |
| Unproved | $ | 295,160 | $ | 6,216 | $ | - | $ | (604) | $ | 300,772
| Proved |  | 4,219 |  | 28 |  | - |  | - |  | 4,247
|  | Subtotal |  | 299,379 |  | 6,244 |  | - |  | (604) |  | 305,019
Exploration Costs |  | 311,369 |  | 31,472 |  | 2,549 |  | 18,164 |  | 363,554
Development Costs (3) |  | 5,410,378 |  | 302,564 |  | 138,905 |  | 78,744 |  | 5,930,591
|  | Total | $ | 6,021,126 | $ | 340,280 | $ | 141,454 | $ | 96,304 | $ | 6,599,164
2010 |  |  |  |  |  |  |  |  |  |
Acquisition Costs of Properties |  |  |  |  |  |  |  |  |  |
| Unproved | $ | 403,509 | $ | 13,956 | $ | - | $ | (107) | $ | 417,358
| Proved |  | - |  | - |  | - |  | - |  | -
|  | Subtotal |  | 403,509 |  | 13,956 |  | - |  | (107) |  | 417,358
Exploration Costs |  | 454,379 |  | 38,604 |  | 23,386 |  | 86,784 |  | 603,153
Development Costs (4) |  | 3,892,403 |  | 417,176 |  | 114,986 |  | 13,429 |  | 4,437,994
|  | Total | $ | 4,750,291 | $ | 469,736 | $ | 138,372 | $ | 100,106 | $ | 5,458,505
(1) | Other International primarily consists of EOG's United Kingdom, China and Argentina operations.
(2) | Includes Asset Retirement Costs of $80 million, $33 million, $2 million and $12 million for the United States, Canada, Trinidad and Other International, respectively. Excludes other property, plant and equipment.
(3) | Includes Asset Retirement Costs of $52 million, $70 million, $7 million and $4 million for the United States, Canada, Trinidad and Other International, respectively. Excludes other property, plant and equipment.
(4) | Includes Asset Retirement Costs of $71 million, $2 million, $(3) million and $2 million for the United States, Canada, Trinidad and Other International, respectively. Excludes other property, plant and equipment.
Results of Operations for Oil and Gas Producing Activities | Results of Operations for Oil and Gas Producing Activities (1). The following table sets forth results of operations for oil and gas producing activities for the years ended December 31, 2012, 2011 and 2010:
|  | United |  |  |  |  |  | Other |  |
|  | States |  | Canada |  | Trinidad |  | International (2) |  | Total
2012 |  |  |  |  |  |  |  |  |  |
Crude Oil and Condensate, Natural Gas Liquids and Natural Gas Revenues | $ | 7,048,572 | $ | 321,597 | $ | 565,030 | $ | 23,177 | $ | 7,958,376
Other |  | 40,780 |  | 367 |  | 15 |  | - |  | 41,162
|  | Total |  | 7,089,352 |  | 321,964 |  | 565,045 |  | 23,177 | ` | 7,999,538
Exploration Costs |  | 162,152 |  | 13,350 |  | 2,262 |  | 7,805 |  | 185,569
Dry Hole Costs |  | 1,772 |  | 1,570 |  | - |  | 11,628 |  | 14,970
Transportation Costs |  | 591,547 |  | 7,511 |  | 1,104 |  | 1,269 |  | 601,431
Production Costs |  | 1,264,633 |  | 154,509 |  | 37,792 |  | 11,694 |  | 1,468,628
Impairments |  | 294,172 |  | 976,563 |  | - |  | - |  | 1,270,735
Depreciation, Depletion and Amortization |  | 2,637,500 |  | 222,366 |  | 146,690 |  | 17,958 |  | 3,024,514
Income (Loss) Before Income Taxes |  | 2,137,576 |  | (1,053,905) |  | 377,197 |  | (27,177) |  | 1,433,691
Income Tax Provision (Benefit) |  | 761,459 |  | (136,105) |  | 119,442 |  | (21,890) |  | 722,906
Results of Operations | $ | 1,376,117 | $ | (917,800) | $ | 257,755 | $ | (5,287) | $ | 710,785
2011 |  |  |  |  |  |  |  |  |  |
Crude Oil and Condensate, Natural Gas Liquids and Natural Gas Revenues | $ | 5,814,942 | $ | 459,853 | $ | 555,143 | $ | 28,250 | $ | 6,858,188
Other |  | 32,329 |  | 258 |  | 586 |  | - |  | 33,173
|  | Total |  | 5,847,271 |  | 460,111 |  | 555,729 |  | 28,250 | ` | 6,891,361
Exploration Costs |  | 148,199 |  | 10,479 |  | 2,520 |  | 10,460 |  | 171,658
Dry Hole Costs |  | 30,521 |  | 432 |  | - |  | 22,277 |  | 53,230
Transportation Costs |  | 421,060 |  | 5,969 |  | 1,620 |  | 1,673 |  | 430,322
Production Costs |  | 1,096,955 |  | 174,973 |  | 49,318 |  | 10,964 |  | 1,332,210
Impairments |  | 575,976 |  | 452,103 |  | - |  | 2,958 |  | 1,031,037
Depreciation, Depletion and Amortization |  | 2,011,080 |  | 258,772 |  | 106,802 |  | 17,160 |  | 2,393,814
Income (Loss) Before Income Taxes |  | 1,563,480 |  | (442,617) |  | 395,469 |  | (37,242) |  | 1,479,090
Income Tax Provision (Benefit) |  | 569,153 |  | (121,044) |  | 202,815 |  | (13,056) |  | 637,868
Results of Operations | $ | 994,327 | $ | (321,573) | $ | 192,654 | $ | (24,186) | $ | 841,222
2010 |  |  |  |  |  |  |  |  |  |
Crude Oil and Condensate, Natural Gas Liquids and Natural Gas Revenues | $ | 3,928,240 | $ | 477,416 | $ | 447,852 | $ | 27,707 | $ | 4,881,215
Other |  | 19,886 |  | (31) |  | 3,696 |  | - |  | 23,551
|  | Total |  | 3,948,126 |  | 477,385 |  | 451,548 |  | 27,707 |  | 4,904,766
Exploration Costs |  | 156,252 |  | 17,597 |  | 2,277 |  | 11,255 |  | 187,381
Dry Hole Costs |  | 30,927 |  | 14,875 |  | 5,000 |  | 21,684 |  | 72,486
Transportation Costs |  | 372,466 |  | 9,892 |  | 1,348 |  | 1,483 |  | 385,189
Production Costs |  | 763,769 |  | 174,667 |  | 51,125 |  | 8,504 |  | 998,065
Impairments |  | 271,466 |  | 451,703 |  | 1,465 |  | 418 |  | 725,052
Depreciation, Depletion and Amortization |  | 1,430,408 |  | 314,663 |  | 70,553 |  | 15,399 |  | 1,831,023
Income (Loss) Before Income Taxes |  | 922,838 |  | (506,012) |  | 319,780 |  | (31,036) |  | 705,570
Income Tax Provision (Benefit) |  | 375,855 |  | (151,315) |  | 140,413 |  | (14,245) |  | 350,708
Results of Operations | $ | 546,983 | $ | (354,697) | $ | 179,367 | $ | (16,791) | $ | 354,862
(1) | Excludes gains or losses on the mark-to-market of financial commodity derivative contracts, gains or losses on sales of reserves and related assets, interest charges and general corporate expenses for each of the three years in the period ended December 31, 2012.
(2) | Other International primarily consists of EOG's United Kingdom, China and Argentina operations.
Production Costs Per Barrel of Oil Equivalent | The following table sets forth production costs per barrel of oil equivalent, excluding severance/production and ad valorem taxes, for the years ended December 31, 2012, 2011 and 2010:
|  | United |  |  |  |  |  | Other |  |
|  | States |  | Canada |  | Trinidad |  | International (1) |  | Composite
Year Ended December 31, 2012 | $ | 5.96 | $ | 16.42 | $ | 0.98 | $ | 18.97 | $ | 5.85
Year Ended December 31, 2011 | $ | 6.19 | $ | 14.26 | $ | 0.78 | $ | 13.82 | $ | 6.03
Year Ended December 31, 2010 | $ | 5.00 | $ | 10.28 | $ | 0.65 | $ | 9.34 | $ | 4.85
(1) Other International primarily consists of EOG's United Kingdom, China and Argentina operations.
Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves Table | The following table sets forth the standardized measure of discounted future net cash flows from projected production of EOG's oil and gas reserves for the years ended December 31, 2012, 2011 and 2010:
|  | United |  |  |  |  |  | Other |  |
|  | States |  | Canada |  | Trinidad |  | International (1) |  | Total
2012 |  |  |  |  |  |  |  |  |  |
| Future cash inflows (2) | $ | 89,324,274 | $ | 1,816,369 | $ | 2,408,116 | $ | 1,063,854 | $ | 94,612,613
| Future production costs |  | (35,892,997) |  | (751,113) |  | (342,113) |  | (198,609) |  | (37,184,832)
| Future development costs |  | (15,825,040) |  | (813,061) |  | (171,737) |  | (221,893) |  | (17,031,731)
| Future income taxes |  | (10,247,007) |  | - |  | (691,109) |  | (212,626) |  | (11,150,742)
| Future net cash flows |  | 27,359,230 |  | 252,195 |  | 1,203,157 |  | 430,726 |  | 29,245,308
| Discount to present value at 10% annual rate |  | (12,177,896) |  | 146,954 |  | (242,087) |  | (56,807) |  | (12,329,836)
| Standardized measure of discounted future net cash flows relating to proved oil and gas reserves | $ | 15,181,334 | $ | 399,149 | $ | 961,070 | $ | 373,919 | $ | 16,915,472
2011 |  |  |  |  |  |  |  |  |  |
| Future cash inflows (3) | $ | 84,518,638 | $ | 5,056,501 | $ | 2,851,545 | $ | 103,853 | $ | 92,530,537
| Future production costs |  | (33,294,343) |  | (2,315,110) |  | (388,199) |  | (62,938) |  | (36,060,590)
| Future development costs |  | (13,811,449) |  | (1,566,917) |  | (149,884) |  | (331) |  | (15,528,581)
| Future income taxes |  | (10,539,182) |  | (81,590) |  | (794,856) |  | (2,457) |  | (11,418,085)
| Future net cash flows |  | 26,873,664 |  | 1,092,884 |  | 1,518,606 |  | 38,127 |  | 29,523,281
| Discount to present value at 10% annual rate |  | (12,498,010) |  | (456,537) |  | (334,399) |  | (9,054) |  | (13,298,000)
| Standardized measure of discounted future net cash flows relating to proved oil and gas reserves | $ | 14,375,654 | $ | 636,347 | $ | 1,184,207 | $ | 29,073 | $ | 16,225,281
2010 |  |  |  |  |  |  |  |  |  |
| Future cash inflows (4) | $ | 62,063,123 | $ | 6,040,422 | $ | 2,760,819 | $ | 91,805 | $ | 70,956,169
| Future production costs |  | (22,616,039) |  | (2,711,415) |  | (384,147) |  | (48,953) |  | (25,760,554)
| Future development costs |  | (9,596,005) |  | (1,716,734) |  | (198,072) |  | (334) |  | (11,511,145)
| Future income taxes |  | (8,503,301) |  | (129,816) |  | (850,699) |  | (3,598) |  | (9,487,414)
| Future net cash flows |  | 21,347,778 |  | 1,482,457 |  | 1,327,901 |  | 38,920 |  | 24,197,056
| Discount to present value at 10% annual rate |  | (10,718,854) |  | (736,222) |  | (339,035) |  | (11,121) |  | (11,805,232)
| Standardized measure of discounted future net cash flows relating to proved oil and gas reserves | $ | 10,628,924 | $ | 746,235 | $ | 988,866 | $ | 27,799 | $ | 12,391,824
(1) | Other International includes EOG's United Kingdom, China and Argentina operations.
(2) | Estimated crude oil prices used to calculate 2012 future cash inflows for the United States, Canada, Trinidad and Other International were $99.78, $84.77, $94.46 and $109.94, respectively. Estimated NGLs prices used to calculate 2012 future cash inflows for the United States and Canada were $36.95 and $47.80, respectively. Estimated natural gas prices used to calculate 2012 future cash inflows for the United States, Canada, Trinidad and Other International were $2.63, $2.22, $3.61 and $5.04, respectively.
(3) | Estimated crude oil prices used to calculate 2011 future cash inflows for the United States, Canada, Trinidad and Other International were $97.75, $90.70, $92.50 and $102.86, respectively. Estimated NGLs prices used to calculate 2011 future cash inflows for the United States and Canada were $51.77 and $46.97, respectively. Estimated natural gas prices used to calculate 2011 future cash inflows for the United States, Canada, Trinidad and Other International were $4.03, $3.28, $3.37, and $5.07, respectively.
(4) | Estimated crude oil prices used to calculate 2010 future cash inflows for the United States, Canada, Trinidad and Other International were $76.38, $72.59, $69.56 and $73.88, respectively. Estimated NGLs prices used to calculate 2010 future cash inflows for the United States and Canada were $43.85 and $26.56, respectively. Estimated natural gas prices used to calculate 2010 future cash inflows for the United States, Canada, Trinidad and Other International were $4.36, $3.67, $2.94 and $5.02, respectively.
Changes in Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Reserves | Changes in Standardized Measure of Discounted Future Net Cash Flows. The following table sets forth the changes in the standardized measure of discounted future net cash flows at December 31, for each of the three years in the period ended December 31, 2012:
|  | United |  |  |  |  |  | Other |  |
|  | States |  | Canada |  | Trinidad |  | International |  | Total
December 31, 2009 | $ | 5,822,916 | $ | 1,037,244 | $ | 665,563 | $ | 15,295 | $ | 7,541,018
| Sales and transfers of oil and gas produced, net of production costs |  | (2,792,005) |  | (292,857) |  | (395,379) |  | (17,720) |  | (3,497,961)
| Net changes in prices and production costs |  | 2,468,907 |  | (559) |  | 721,796 |  | 7,259 |  | 3,197,403
| Extensions, discoveries, additions and improved recovery, net of related costs |  | 4,319,659 |  | 75,162 |  | 183,453 |  | - |  | 4,578,274
| Development costs incurred |  | 864,700 |  | 175,100 |  | 67,300 |  | - |  | 1,107,100
| Revisions of estimated development cost |  | (257,360) |  | 260,290 |  | (767) |  | 9 |  | 2,172
| Revisions of previous quantity estimates |  | (164,748) |  | (38,382) |  | (175,002) |  | 4,006 |  | (374,126)
| Accretion of discount |  | 755,001 |  | 102,022 |  | 101,549 |  | 1,778 |  | 960,350
| Net change in income taxes |  | (1,171,384) |  | 101,966 |  | (258,354) |  | 2,469 |  | (1,325,303)
| Purchases of reserves in place |  | 265 |  | - |  | - |  | - |  | 265
| Sales of reserves in place |  | (54,057) |  | (290,592) |  | - |  | - |  | (344,649)
| Changes in timing and other |  | 837,030 |  | (383,159) |  | 78,707 |  | 14,703 |  | 547,281
December 31, 2010 |  | 10,628,924 |  | 746,235 |  | 988,866 |  | 27,799 |  | 12,391,824
| Sales and transfers of oil and gas produced, net of production costs |  | (4,296,926) |  | (278,910) |  | (504,205) |  | (15,614) |  | (5,095,655)
| Net changes in prices and production costs |  | 716,682 |  | (57,545) |  | 331,196 |  | 3,328 |  | 993,661
| Extensions, discoveries, additions and improved recovery, net of related costs |  | 6,223,552 |  | 22,591 |  | 102,548 |  | - |  | 6,348,691
| Development costs incurred |  | 1,422,500 |  | 48,200 |  | 74,800 |  | - |  | 1,545,500
| Revisions of estimated development cost |  | (210,919) |  | 64,001 |  | (14,074) |  | 2 |  | (160,990)
| Revisions of previous quantity estimates |  | (482,496) |  | (70,718) |  | (56,884) |  | 801 |  | (609,297)
| Accretion of discount |  | 1,352,740 |  | 62,725 |  | 159,715 |  | 2,782 |  | 1,577,962
| Net change in income taxes |  | (1,049,641) |  | (118,988) |  | 9,511 |  | 13 |  | (1,159,105)
| Purchases of reserves in place |  | 5,241 |  | - |  | - |  | - |  | 5,241
| Sales of reserves in place |  | (658,468) |  | - |  | - |  | - |  | (658,468)
| Changes in timing and other |  | 724,465 |  | 218,756 |  | 92,734 |  | 9,962 |  | 1,045,917
December 31, 2011 |  | 14,375,654 |  | 636,347 |  | 1,184,207 |  | 29,073 |  | 16,225,281
| Sales and transfers of oil and gas produced, net of production costs |  | (5,192,392) |  | (159,577) |  | (526,134) |  | (10,214) |  | (5,888,317)
| Net changes in prices and production costs |  | (393,585) |  | (67,964) |  | 162,600 |  | (2,283) |  | (301,232)
| Extensions, discoveries, additions and improved recovery, net of related costs |  | 5,517,945 |  | 79,529 |  | - |  | 484,648 |  | 6,082,122
| Development costs incurred |  | 2,042,300 |  | 23,600 |  | 23,500 |  | 5,200 |  | 2,094,600
| Revisions of estimated development cost |  | 1,987,330 |  | 383,215 |  | (28,835) |  | (234) |  | 2,341,476
| Revisions of previous quantity estimates |  | (3,286,943) |  | (396,408) |  | (62,285) |  | 2,809 |  | (3,742,827)
| Accretion of discount |  | 1,832,377 |  | 63,635 |  | 178,298 |  | 2,907 |  | 2,077,217
| Net change in income taxes |  | 174,418 |  | - |  | 88,853 |  | (138,206) |  | 125,065
| Purchases of reserves in place |  | 64,317 |  | - |  | - |  | 5,623 |  | 69,940
| Sales of reserves in place |  | (869,534) |  | (44,227) |  | - |  | - |  | (913,761)
| Changes in timing and other |  | (1,070,553) |  | (119,001) |  | (59,134) |  | (5,404) |  | (1,254,092)
December 31, 2012 | $ | 15,181,334 | $ | 399,149 | $ | 961,070 | $ | 373,919 | $ | 16,915,472

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