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Supplemental information on oil and gas activities (Tables) | 12 Months Ended
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Dec. 31, 2021
Disclosure of Supplemental information on oil and gas activities [Abstract] |
Schedule of Costs Incurred in Exploration, Property Acquisitions and Development | Development costs include drilling costs and equipment for developmental wells, the construction of facilities for extraction, treatment and storage of hydrocarbons and all necessary costs to maintain facilities for the existing developed reserves. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amounts in US$‘000 | ​ | Colombia | ​ | Chile | ​ | Brazil | ​ | Argentina | ​ | Total
Year ended December 31, 2021 | ​ |  | ​ |  | ​ |  | ​ |  | ​ |
Acquisition of properties | ​ |  | ​ |  | ​ |  | ​ |  | ​ |
Proved | ​ | — | ​ | — | ​ | — | ​ | — | ​ | —
Unproved | ​ | — | ​ | — | ​ | — | ​ | — | ​ | —
Total property acquisition | ​ | — | ​ | — | ​ | — | ​ | — | ​ | —
Exploration | ​ | 40,828 | ​ | 3,940 | ​ | 3 | ​ | 998 | ​ | 45,769
Development (a) | ​ | 81,310 | ​ | 1,900 | ​ | (2,212) | ​ | 2 | ​ | 81,000
Total costs incurred | ​ | 122,138 | ​ | 5,840 | ​ | (2,209) | ​ | 1,000 | ​ | 126,769
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amounts in US$‘000 | ​ | Colombia | ​ | Chile | ​ | Brazil | ​ | Argentina | ​ | Total
Year ended December 31, 2020 | ​ |  | ​ |  | ​ |  | ​ |  | ​ |
Acquisition of properties | ​ |  | ​ |  | ​ |  | ​ |  | ​ |
Proved | ​ | 202,913 | ​ | — | ​ | — | ​ | — | ​ | 202,913
Unproved | ​ | 73,310 | ​ | — | ​ | — | ​ | — | ​ | 73,310
Total property acquisition | ​ | 276,223 | ​ | — | ​ | — | ​ | — | ​ | 276,223
Exploration | ​ | 19,142 | ​ | 9,447 | ​ | 668 | ​ | 694 | ​ | 29,951
Development (a) | ​ | 51,793 | ​ | 3,580 | ​ | 412 | ​ | (3,855) | ​ | 51,930
Total costs incurred | ​ | 70,935 | ​ | 13,027 | ​ | 1,080 | ​ | (3,161) | ​ | 81,881
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amounts in US$‘000 | ​ | Colombia | ​ | Chile | ​ | Brazil | ​ | Argentina | ​ | Peru | ​ | Total
Year ended December 31, 2019 | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ |
Acquisition of properties | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ |
Proved | ​ | — | ​ | — | ​ | — | ​ | — | ​ | — | ​ | —
Unproved | ​ | — | ​ | — | ​ | — | ​ | — | ​ | — | ​ | —
Total property acquisition | ​ | — | ​ | — | ​ | — | ​ | — | ​ | — | ​ | —
Exploration | ​ | 22,008 | ​ | 8,483 | ​ | 5,219 | ​ | 4,116 | ​ | — | ​ | 39,826
Development (a) | ​ | 68,818 | ​ | 2,611 | ​ | 143 | ​ | 25,109 | ​ | 14,408 | ​ | 111,089
Total costs incurred | ​ | 90,826 | ​ | 11,094 | ​ | 5,362 | ​ | 29,225 | ​ | 14,408 | ​ | 150,915
(a) | Includes the effect of change in estimate of assets retirement obligations.
Schedule of Capitalized Costs Related to Oil and Gas Producing Activities | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amounts in US$‘000 | ​ | Colombia | ​ | Chile | ​ | Brazil | ​ | Argentina | ​ | Total
As of December 31, 2021 | ​ |  | ​ |  | ​ |  | ​ |  | ​ |
Proved properties (a) | ​ |  | ​ |  | ​ |  | ​ |  | ​ |
Equipment, camps and other facilities | ​ | 125,078 | ​ | 72,766 | ​ | 3,333 | ​ | — | ​ | 201,177
Mineral interest and wells | ​ | 580,931 | ​ | 334,993 | ​ | 42,008 | ​ | — | ​ | 957,932
Other uncompleted projects | ​ | 26,136 | ​ | 818 | ​ | 250 | ​ | — | ​ | 27,204
Unproved properties (b) | ​ | 94,419 | ​ | — | ​ | 271 | ​ | — | ​ | 94,690
Gross capitalized costs | ​ | 826,564 | ​ | 408,577 | ​ | 45,862 | ​ | — | ​ | 1,281,003
Accumulated depreciation | ​ | (282,616) | ​ | (358,417) | ​ | (38,741) | ​ | — | ​ | (679,774)
Total net capitalized costs | ​ | 543,948 | ​ | 50,160 | ​ | 7,121 | ​ | — | ​ | 601,229
(a) | Includes capitalized amounts related to asset retirement obligations, impairment loss recognized in Chile for US$ 17,641,000 and impairment loss reversed in Argentina for US$ 13,307,000.
(b) | Do not include Ecuador capitalized costs.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amounts in US$‘000 | ​ | Colombia | ​ | Chile | ​ | Brazil | ​ | Argentina | ​ | Total
As of December 31, 2020 | ​ |  | ​ |  | ​ |  | ​ |  | ​ |
Proved properties (a) | ​ |  | ​ |  | ​ |  | ​ |  | ​ |
Equipment, camps and other facilities | ​ | 115,577 | ​ | 74,363 | ​ | 3,580 | ​ | 4,309 | ​ | 197,829
Mineral interest and wells | ​ | 511,040 | ​ | 348,366 | ​ | 47,729 | ​ | 61,482 | ​ | 968,617
Other uncompleted projects (b) | ​ | 13,048 | ​ | 2,158 | ​ | 245 | ​ | 26 | ​ | 15,477
Unproved properties (c) | ​ | 77,388 | ​ | — | ​ | 432 | ​ | — | ​ | 77,820
Gross capitalized costs | ​ | 717,053 | ​ | 424,887 | ​ | 51,986 | ​ | 65,817 | ​ | 1,259,743
Accumulated depreciation | ​ | (228,929) | ​ | (345,611) | ​ | (38,273) | ​ | (45,619) | ​ | (658,432)
Total net capitalized costs | ​ | 488,124 | ​ | 79,276 | ​ | 13,713 | ​ | 20,198 | ​ | 601,311
(a) | Includes capitalized amounts related to asset retirement obligations, impairment loss in Chile, Argentina and Brazil for US$ 81,967,000, US$ 16,205,000 and US$ 1,717,000, respectively.
(b) | Do not include Peru capitalized costs.
(c) | Do not include Ecuador capitalized costs.
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amounts in US$‘000 | ​ | Colombia | ​ | Chile | ​ | Brazil | ​ | Argentina | ​ | Total
As of December 31, 2019 | ​ |  | ​ |  | ​ |  | ​ |  | ​ |
Proved properties (a) | ​ |  | ​ |  | ​ |  | ​ |  | ​ |
Equipment, camps and other facilities | ​ | 79,999 | ​ | 84,069 | ​ | 4,615 | ​ | 3,824 | ​ | 172,507
Mineral interest and wells | ​ | 282,973 | ​ | 402,392 | ​ | 64,179 | ​ | 81,393 | ​ | 830,937
Other uncompleted projects (b) | ​ | 19,754 | ​ | 11,984 | ​ | 209 | ​ | 765 | ​ | 32,712
Unproved properties | ​ | 567 | ​ | 45,681 | ​ | 1,788 | ​ | — | ​ | 48,036
Gross capitalized costs | ​ | 383,293 | ​ | 544,126 | ​ | 70,791 | ​ | 85,982 | ​ | 1,084,192
Accumulated depreciation | ​ | (172,207) | ​ | (313,379) | ​ | (46,370) | ​ | (30,897) | ​ | (562,853)
Total net capitalized costs | ​ | 211,086 | ​ | 230,747 | ​ | 24,421 | ​ | 55,085 | ​ | 521,339
(a) | Includes capitalized amounts related to asset retirement obligations, impairment loss in Argentina for US$ 7,559,000.
(b) | Do not include Peru capitalized costs.
Schedule of Results of Operations for Oil and Gas Producing Activities | The breakdown of results of the operations shown below summarizes revenues and expenses directly associated with oil and gas producing activities for the years ended December 31, 2021, 2020 and 2019. Income tax for the years presented was calculated utilizing the statutory tax rates. ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amounts in US$‘000 | ​ | Colombia | ​ | Chile | ​ | Brazil | ​ | Argentina | ​ | Total
Year ended December 31, 2021 | ​ |  | ​ |  | ​ |  | ​ |  | ​ |
Revenue | ​ | 618,268 | ​ | 21,471 | ​ | 20,109 | ​ | 28,695 | ​ | 688,543
Production costs, excluding depreciation | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating costs | ​ | (72,043) | ​ | (10,280) | ​ | (2,954) | ​ | (14,490) | ​ | (99,767)
Royalties | ​ | (106,341) | ​ | (770) | ​ | (1,642) | ​ | (4,270) | ​ | (113,023)
Total production costs | ​ | (178,384) | ​ | (11,050) | ​ | (4,596) | ​ | (18,760) | ​ | (212,790)
Exploration expenses (a) | ​ | (11,276) | ​ | (4,509) | ​ | — | ​ | (998) | ​ | (16,783)
Accretion expense (b) | ​ | (576) | ​ | (1,319) | ​ | (535) | ​ | (710) | ​ | (3,140)
Impairment loss for non-financial assets | ​ | — | ​ | (17,641) | ​ | — | ​ | 13,307 | ​ | (4,334)
Depreciation, depletion and amortization | ​ | (54,588) | ​ | (12,806) | ​ | (2,933) | ​ | (8,152) | ​ | (78,479)
Results of operations before income tax | ​ | 373,444 | ​ | (25,854) | ​ | 12,045 | ​ | 13,382 | ​ | 373,017
Income tax (expense) benefit | ​ | (115,989) | ​ | 3,878 | ​ | (4,095) | ​ | (4,684) | ​ | (120,890)
Results of oil and gas operations | ​ | 257,455 | ​ | (21,976) | ​ | 7,950 | ​ | 8,698 | ​ | 252,127
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amounts in US$‘000 | ​ | Colombia | ​ | Chile | ​ | Brazil | ​ | Argentina | ​ | Total
Year ended December 31, 2020 | ​ |  | ​ |  | ​ |  | ​ |  | ​ |
Revenue | ​ | 334,606 | ​ | 21,704 | ​ | 12,783 | ​ | 24,599 | ​ | 393,692
Production costs, excluding depreciation | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating costs | ​ | (61,866) | ​ | (9,491) | ​ | (2,827) | ​ | (15,013) | ​ | (89,197)
Royalties | ​ | (30,453) | ​ | (753) | ​ | (1,049) | ​ | (3,620) | ​ | (35,875)
Total production costs | ​ | (92,319) | ​ | (10,244) | ​ | (3,876) | ​ | (18,633) | ​ | (125,072)
Exploration expenses (a) | ​ | (12,493) | ​ | (50,301) | ​ | (1,000) | ​ | (694) | ​ | (64,488)
Accretion expense (b) | ​ | (670) | ​ | (1,358) | ​ | (867) | ​ | (1,381) | ​ | (4,276)
Impairment loss for non-financial assets | ​ | — | ​ | (81,967) | ​ | (1,717) | ​ | (16,205) | ​ | (99,889)
Depreciation, depletion and amortization | ​ | (56,720) | ​ | (32,233) | ​ | (2,488) | ​ | (14,723) | ​ | (106,164)
Results of operations before income tax | ​ | 172,404 | ​ | (154,399) | ​ | 2,835 | ​ | (27,037) | ​ | (6,197)
Income tax (expense) benefit | ​ | (55,169) | ​ | 23,160 | ​ | (964) | ​ | 8,111 | ​ | (24,862)
Results of oil and gas operations | ​ | 117,235 | ​ | (131,239) | ​ | 1,871 | ​ | (18,926) | ​ | (31,059)
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amounts in US$‘000 | ​ | Colombia | ​ | Chile | ​ | Brazil | ​ | Argentina | ​ | Total
Year ended December 31, 2019 | ​ |  | ​ |  | ​ |  | ​ |  | ​ |
Revenue | ​ | 538,917 | ​ | 32,336 | ​ | 23,049 | ​ | 34,605 | ​ | 628,907
Production costs, excluding depreciation | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Operating costs | ​ | (60,545) | ​ | (18,608) | ​ | (4,098) | ​ | (21,137) | ​ | (104,388)
Royalties | ​ | (56,399) | ​ | (1,181) | ​ | (1,855) | ​ | (5,141) | ​ | (64,576)
Total production costs | ​ | (116,944) | ​ | (19,789) | ​ | (5,953) | ​ | (26,278) | ​ | (168,964)
Exploration expenses (a) | ​ | (10,921) | ​ | (126) | ​ | (6,152) | ​ | (13,947) | ​ | (31,146)
Accretion expense (b) | ​ | (813) | ​ | (1,283) | ​ | (832) | ​ | (722) | ​ | (3,650)
Impairment loss for non-financial assets | ​ | — | ​ | — | ​ | — | ​ | (7,559) | ​ | (7,559)
Depreciation, depletion and amortization | ​ | (44,906) | ​ | (34,344) | ​ | (6,200) | ​ | (14,534) | ​ | (99,984)
Results of operations before income tax | ​ | 365,333 | ​ | (23,206) | ​ | 3,912 | ​ | (28,435) | ​ | 317,604
Income tax (expense) benefit | ​ | (120,560) | ​ | 3,481 | ​ | (1,330) | ​ | 8,531 | ​ | (109,878)
Results of oil and gas operations | ​ | 244,773 | ​ | (19,725) | ​ | 2,582 | ​ | (19,904) | ​ | 207,726
(a) | Do not include Peru and Ecuador costs.
(b) | Represents accretion of ARO and other environmental liabilities.
Schedule of Reserve Quantity Information | The estimated GeoPark net proved reserves for the properties evaluated as of December 31, 2021, 2020, 2019 and 2018 are summarized as follows, expressed in thousands of barrels (Mbbl) and millions of cubic feet (MMcf): ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | As of December 31, 2021 | ​ | As of December 31, 2020 | ​ | As of December 31, 2019 | ​ | As of December 31, 2018
​ | ​ | Oil and | ​ | ​ | ​ | Oil and | ​ | ​ | ​ | Oil and | ​ | ​ | ​ | Oil and | ​ | ​
​ | ​ | condensate | ​ | Natural gas | ​ | condensate | ​ | Natural gas | ​ | condensate | ​ | Natural gas | ​ | condensate | ​ | Natural gas
​ |  | (Mbbl) |  | (MMcf) |  | (Mbbl) |  | (MMcf) |  | (Mbbl) |  | (MMcf) |  | (Mbbl) |  | (MMcf)
Net proved developed | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ |
Colombia (a) | ​ | 47,766 | ​ | 1,207 | ​ | 43,817 | ​ | 1,695 | ​ | 39,397 | ​ | 2,319 | ​ | 32,326 | ​ | 1,763
Chile (b) | ​ | 755 | ​ | 15,196 | ​ | 798 | ​ | 19,054 | ​ | 898 | ​ | 14,406 | ​ | 696 | ​ | 11,944
Brazil (c) | ​ | 43 | ​ | 13,601 | ​ | 34 | ​ | 13,927 | ​ | 48 | ​ | 14,872 | ​ | 55 | ​ | 17,339
Argentina (d) | ​ | 1,186 | ​ | 3,379 | ​ | 1,685 | ​ | 5,599 | ​ | 1,658 | ​ | 5,785 | ​ | 2,058 | ​ | 6,207
Total consolidated | ​ | 49,750 | ​ | 33,383 | ​ | 46,334 | ​ | 40,275 | ​ | 42,001 | ​ | 37,382 | ​ | 35,135 | ​ | 37,253
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Net proved undeveloped | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ | ​
Colombia (e) | ​ | 31,019 | ​ | — | ​ | 45,240 | ​ | — | ​ | 51,212 | ​ | — | ​ | 42,449 | ​ | 359
Chile (b) | ​ | 575 | ​ | 1,563 | ​ | 1,229 | ​ | 5,661 | ​ | 2,809 | ​ | 6,413 | ​ | 2,622 | ​ | 8,823
Argentina (f) | ​ | 603 | ​ | — | ​ | 104 | ​ | — | ​ | 1,370 | ​ | 450 | ​ | 1,440 | ​ | 3,174
Peru (g) | ​ | — | ​ | — | ​ | — | ​ | — | ​ | 19,210 | ​ | — | ​ | 18,460 | ​ | —
Total consolidated | ​ | 32,197 | ​ | 1,563 | ​ | 46,573 | ​ | 5,661 | ​ | 74,601 | ​ | 6,863 | ​ | 64,971 | ​ | 12,356
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Total proved reserves | ​ | 81,947 | ​ | 34,946 | ​ | 92,907 | ​ | 45,936 | ​ | 116,602 | ​ | 44,245 | ​ | 100,106 | ​ | 49,609
(a) | Llanos 34 Block, CPO-5 Block, Llanos 32 Block and Platanillo Block account for 88%, 8%, 2% and 2% (Llanos 34 Block, CPO-5 Block, Llanos 32 Block and Platanillo Block account for 86%, 8%, 3% and 3% in 2020, Llanos 34
| Block and Llanos 32 Block account for 97% and 3% in 2019, and Llanos 34 Block, La Cuerva Block, Yamu Block and Llanos 32 Block account for 96%, 1.5%, 1.5% and 1% in 2018) of the proved developed reserves, respectively.
(b) | Fell Block accounts for 100% of the reserves.
(c) | BCAM-40 Block accounts for 100% of the reserves.
(d) | Aguada Baguales Block, Puesto Touquet Block, and El Porvenir Block account for 45%, 21% and 33% (Aguada Baguales Block, Puesto Touquet Block, and El Porvenir Block account for 50%, 26% and 24% in 2020, 49%, 30% and 21% in 2019 and 48%, 33% and 19% in 2018) of the proved developed reserves, respectively.
(e) | Llanos 34 Block, Llanos 32 Block, CPO-5 Block and Platanillo Block account 88%, 5%, 5% and 3% (Llanos 34 Block, Llanos 32 Block and CPO-5 Block account 91%, 5% and 4% in 2020, Llanos 34 Block and Llanos 32 Block account 96% and 4% in 2019, and Llanos 34 Block, La Cuerva Block and Yamu Block account for 97%, 2% and 1% in 2018) of the proved undeveloped reserves, respectively.
(f) | Aguada Baguales Block accounts for 100% (Aguada Baguales Block accounts for 100% in 2020 and 2019, and Aguada Baguales Block and El Porvenir Block account for 75% and 25% in 2018) of the proved undeveloped reserves, respectively.
(g) | Morona Block accounted for 100% of the reserves.
​
Schedule of Net Proved Reserves of Oil, Condensate and Natural Gas | Net proved reserves (developed and undeveloped) of oil and condensate: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Thousands of barrels | ​ | Colombia | ​ | Chile | ​ | Brazil | ​ | Argentina | ​ | Peru | ​ | Total
Reserves as of December 31, 2018 | ​ | 74,775 | ​ | 3,318 | ​ | 55 | ​ | 3,498 | ​ | 18,460 | ​ | 100,106
Increase (decrease) attributable to: | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ |
Revisions (a) | ​ | 18,341 | ​ | 541 | ​ | 4 | ​ | 95 | ​ | 750 | ​ | 19,731
Extensions and discoveries (b) | ​ | 8,071 | ​ | 36 | ​ | — | ​ | — | ​ | — | ​ | 8,107
Production | ​ | (10,578) | ​ | (188) | ​ | (11) | ​ | (565) | ​ | — | ​ | (11,342)
Reserves as of December 31, 2019 | ​ | 90,609 | ​ | 3,707 | ​ | 48 | ​ | 3,028 | ​ | 19,210 | ​ | 116,602
Increase (decrease) attributable to: | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ | ​
Revisions (c) | ​ | (1,964) | ​ | (1,825) | ​ | (7) | ​ | (734) | ​ | — | ​ | (4,530)
Extensions and discoveries (d) | ​ | 4,545 | ​ | 279 | ​ | — | ​ | — | ​ | — | ​ | 4,824
Purchase or (Disposal) of Minerals in place (e) | ​ | 6,853 | ​ | — | ​ | — | ​ | — | ​ | (19,210) | ​ | (12,357)
Production | ​ | (10,986) | ​ | (134) | ​ | (7) | ​ | (505) | ​ | — | ​ | (11,632)
Reserves as of December 31, 2020 | ​ | 89,057 | ​ | 2,027 | ​ | 34 | ​ | 1,789 | ​ | — | ​ | 92,907
Increase (decrease) attributable to: | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ | ​
Revisions (f) | ​ | (3,207) | ​ | (597) | ​ | 18 | ​ | (169) | ​ | — | ​ | (3,955)
Extensions and discoveries (g) | ​ | 3,375 | ​ | — | ​ | — | ​ | 603 | ​ | — | ​ | 3,978
Production | ​ | (10,440) | ​ | (100) | ​ | (9) | ​ | (434) | ​ | — | ​ | (10,983)
Reserves as of December 31, 2021 | ​ | 78,785 | ​ | 1,330 | ​ | 43 | ​ | 1,789 | ​ | — | ​ | 81,947
(a) | For the year ended December 31, 2019, the Group’s oil and condensate proved reserves were revised upward by 19.7 mmbbl. The primary factors leading to the above were:
- A technical revision of the expected results of future wells in the Jacana and Tigana Fields that led to an increase in reserves of 12.3 mmbbl. - Better than expected performance from existing wells that increase the proved developed reserves, mostly originated in Colombia (6.3 mmbbl) from the Tigana and Jacana fields in the Llanos 34 Block. There were also minor increments in Argentina (0.4 mmbbl) originated in better performance of the Aguada Baguales Field wells; and in Chile (0.3 mmbbl) mostly in the Yagan Norte, Konawentru, Alakaluf and Yagan Fields. - An updated geological model for the Situche Field in the Morona Block originated a new estimation of the proved original oil in place volumes that increased the proved undevelop reserves of the block by 0.7 mmbbl. - Such increase was partially offset by a lower average oil prices resulted in a 0.3 mmbbl and 0.3 mmbbl decrease in reserves from the blocks in Colombia and Argentina, respectively. - There were also better well types considered for the Kiuaku, Loij and Konawentru Field that originated a minor increment of 0.2 mmbbl partially compensated by a reduction of 0.04 mmbbl in Argentina Challaco Field condensate due to an unsuccessful well.
(b) | In Colombia, the extensions and discoveries are primary due to the Tigana and Jacana fields appraisal wells and the Guaco field discovery in the Llanos 34 Block and the Azogue field discovery in the Llanos 32 Block. In the Fell Block in Chile, the discovery of the Jauke field.
( c) | For the year ended December 31, 2020, the Group’s oil and condensate proved reserves were revised downward by 4.5 mmbbl. The primary factors leading to the above were:
- Lower average oil prices resulted in a 4.2 mmbbl, 1.1 mmbbl and 0.3 mmbbl decrease in reserves from the blocks in Colombia, Argentina and Chile, respectively. - A reduction of 1.6 mmbbl in Chile due to the revision of the type well in the Kiaku and Loij fields and a reduction in Argentina of 0.2 mmbbl, associated to the revision of the type of well in the Aguada Baguales fields. - Lower than expected performance from the existing wells in Colombia that reduced the proved developed reserves from the Jacana, Tigana and Tigui fields (2.8 mmbbl). - Such decrease was partially offset by a better performance of proved undeveloped reserves in Colombia (5.1 mmbbl) originated by a new estimation of original oil in place and better type wells considered in the Jacana and Tigana fields. In addition, the proved developed reserves increased in the Aguada Baguales Block in Argentina (0.5 mmbbl) and the Konawentru and Guanaco Fields in Chile of 0.1 mmbbl due to better performance of the existing wells. (d) In Colombia, the extensions and discoveries are primary due to the Tigui Field appraisal wells and in Chile are due to the Jauke Field discovery in the Fell Block. (e) Purchase of Minerals in place refers to the CPO-5 and Platanillo Blocks acquisition during 2020 in Colombia. The reduction in Peru is due to the decision to retire from the Morona Block (see Note 36.4.1). (f) For the year ended December 31, 2021, the Group’s oil and condensate proved reserves were revised downward by 4.0 mmbbl. The primary factors leading to the above were: - Lower than expected performance from the existing wells that reduced the proved developed reserves in Colombia (8.9 mmbbl), in Argentina (0.3 mmbbl), and in Chile (0.3 mmbbl). - A decrease of 0.6 mmbbl in Chile due to a change in a previously adopted development plan in the Fell Block. - Such decrease was partially offset by a higher average oil prices resulted in a 5.7 mmbbl, 0.1 mmbbl and 0.3 mmbbl increase in reserves from the blocks in Colombia, Argentina and Chile, respectively. (g) In Colombia, the extensions and discoveries are primary due to the Tigui Field appraisal wells and in Argentina are due to the Aguada Baguales Field. ​ Net proved reserves (developed and undeveloped) of natural gas: ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Millions of cubic feet | ​ | Colombia | ​ | Chile | ​ | Brazil | ​ | Argentina | ​ | Total
Reserves as of December 31, 2018 | ​ | 2,122 | ​ | 20,767 | ​ | 17,339 | ​ | 9,381 | ​ | 49,609
Increase (decrease) attributable to: | ​ |  | ​ |  | ​ |  | ​ |  | ​ | ​
Revisions (a) | ​ | 621 | ​ | (167) | ​ | 1,812 | ​ | (1,791) | ​ | 475
Extensions and discoveries (b) | ​ | 295 | ​ | 5,386 | ​ | — | ​ | — | ​ | 5,681
Production | ​ | (719) | ​ | (5,167) | ​ | (4,279) | ​ | (1,355) | ​ | (11,520)
Reserves as of December 31, 2019 | ​ | 2,319 | ​ | 20,819 | ​ | 14,872 | ​ | 6,235 | ​ | 44,245
Increase (decrease) attributable to: | ​ |  | ​ |  | ​ |  | ​ |  | ​ | ​
Revisions (c) | ​ | (211) | ​ | (385) | ​ | 1,840 | ​ | 889 | ​ | 2,133
Extensions and discoveries (d) | ​ | — | ​ | 10,456 | ​ | — | ​ | — | ​ | 10,456
Production | ​ | (413) | ​ | (6,175) | ​ | (2,785) | ​ | (1,525) | ​ | (10,898)
Reserves as of December 31, 2020 | ​ | 1,695 | ​ | 24,715 | ​ | 13,927 | ​ | 5,599 | ​ | 45,936
Increase (decrease) attributable to: | ​ |  | ​ | ​ | ​ |  | ​ |  | ​ | ​
Revisions (e) | ​ | 14 | ​ | (3,553) | ​ | 3,470 | ​ | (636) | ​ | (705)
Production | ​ | (502) | ​ | (4,403) | ​ | (3,796) | ​ | (1,584) | ​ | (10,285)
Reserves as of December 31, 2021 | ​ | 1,207 | ​ | 16,759 | ​ | 13,601 | ​ | 3,379 | ​ | 34,946
(a) | For the year ended December 31, 2019, the Group’s proved natural gas reserves were revised upward by 0.5 billion cubic feet. This was the combined effect of:
- An increase of proved developed reserves due to better performance of existing wells in Chile (2.2 billion cubic feet) mostly associated to the Pampa Larga, Ache and Monte Aymond Fields; in Brazil (1.8 billion cubic feet) in the Manati Field; Colombia (0.6 billion cubic feet) due to a better performance of the Tigana and Jacana Fields; and Argentina (0.1 billion cubic feet) mostly associated to a better performance of wells in the Aguada Baguales Field. - The above was partially offset by lower than expected performance for the proved undeveloped reserves in Chile (2.4 billion cubic feet) mostly associated to the increase of water production in Ache Field; and Argentina (1.3 billion cubic feet) associated to an unsuccessful well drilled in the Challaco Bajo Field. - Lower average prices resulted in a decrease of 0.5 billion cubic feet reduction in gas proved developed reserves in Argentina.
(b) | The extensions and discoveries are primary due to the Jauke Field discovery in the Fell Block, in Chile, and the gas discovery of the Une Formation in the Azogue field in the Llanos 32 Block, in Colombia.
(c) | For the year ended December 31, 2020, the Group’s proved natural gas reserves were revised upwards by 2.1 billion cubic feet. This was the combined effect of:
- An increase of proved developed reserves due to better performance of existing wells in Chile (7.9 billion cubic feet) mostly associated to the Jauke and Ache Fields, in Brazil (3.0 billion cubic feet) associated to new gas sales plateau in 2021 and forward which leads to better than expected performance of the Manati Field and in Argentina (1.9 billion cubic feet) due to better performance of the Puesto Touquet and El Porvenir Blocks. - The above was partially offset by lower than expected performance of proved undeveloped reserves in Chile (5.8 billion cubic feet) due to revisions of the type of well in the Pampa Larga Field. - Lower average prices resulted in a decrease of 2.5 billion cubic feet, 1.2 billion cubic feet and 1.2 billion cubic feet reduction in gas reserves in Chile, Brazil and Argentina, respectively.
(d) | The extensions and discoveries are primary due to the Jauke Field discovery in the Fell Block, in Chile.
(e) | For the year ended December 31, 2021, the Group’s proved natural gas reserves were revised downward by 0.7 billion cubic feet. This was the combined effect of:
- A decrease of proved developed reserves due to lower performance of existing wells in Argentina (1.6 billion cubic feet) and in Chile (2.7 billion cubic feet) partially offset by better than expected performance in the Manati Field in Brazil (2.5 billion cubic feet). - A decrease of 3.4 billion cubic feet in Chile due to the revision of the type well associated with the incremental activity that reduced the proved undeveloped reserves. - A decrease of 1.5 billion cubic feet in Chile due to a change in a previously adopted development plan in the Fell Block. -Such decrease was partially offset by higher average prices which resulted in an increase of 4.0 billion cubic feet, 1 billion cubic feet and 1 billion cubic feet in Chile, Brazil, and Argentina, respectively. ​
Schedule of Standardized Measure of Discounted Future Net Cash Flows Related to Proved Oil and Gas Reserves | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amounts in US$‘000 |  | Colombia |  | Chile |  | Brazil |  | Argentina |  | Peru |  | Total
As of December 31, 2021 | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ |
Future cash inflows | ​ | 4,381,191 | ​ | 136,152 | ​ | 89,208 | ​ | 109,678 | ​ | — | ​ | 4,716,229
Future production costs | ​ | (1,715,554) | ​ | (69,067) | ​ | (34,930) | ​ | (61,660) | ​ | — | ​ | (1,881,211)
Future development costs | ​ | (197,461) | ​ | (40,339) | ​ | (1,955) | ​ | (49,200) | ​ | — | ​ | (288,955)
Future income taxes | ​ | (754,205) | ​ | — | ​ | (3,449) | ​ | (2,947) | ​ | — | ​ | (760,601)
Undiscounted future net cash flows | ​ | 1,713,971 | ​ | 26,746 | ​ | 48,874 | ​ | (4,129) | ​ | — | ​ | 1,785,462
10% annual discount | ​ | (496,150) | ​ | 6,121 | ​ | (7,171) | ​ | 4,471 | ​ | — | ​ | (492,729)
Standardized measure of discounted future net cash flows | ​ | 1,217,821 | ​ | 32,867 | ​ | 41,703 | ​ | 342 | ​ | — | ​ | 1,292,733
As of December 31, 2020 | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ | ​
Future cash inflows | ​ | 2,561,947 | ​ | 130,200 | ​ | 68,857 | ​ | 83,125 | ​ | — | ​ | 2,844,129
Future production costs | ​ | (850,029) | ​ | (82,290) | ​ | (36,254) | ​ | (65,536) | ​ | — | ​ | (1,034,109)
Future development costs | ​ | (197,859) | ​ | (28,620) | ​ | (2,355) | ​ | (24,640) | ​ | — | ​ | (253,474)
Future income taxes | ​ | (409,276) | ​ | — | ​ | (327) | ​ | — | ​ | — | ​ | (409,603)
Undiscounted future net cash flows | ​ | 1,104,783 | ​ | 19,290 | ​ | 29,921 | ​ | (7,051) | ​ | — | ​ | 1,146,943
10% annual discount | ​ | (345,550) | ​ | (2,258) | ​ | (4,543) | ​ | 7,032 | ​ | — | ​ | (345,319)
Standardized measure of discounted future net cash flows | ​ | 759,233 | ​ | 17,032 | ​ | 25,378 | ​ | (19) | ​ | — | ​ | 801,624
As of December 31, 2019 | ​ |  | ​ |  | ​ |  | ​ |  | ​ |  | ​ | ​
Future cash inflows | ​ | 4,323,914 | ​ | 294,202 | ​ | 86,191 | ​ | 187,064 | ​ | 1,255,239 | ​ | 6,146,610
Future production costs | ​ | (1,159,621) | ​ | (104,688) | ​ | (32,608) | ​ | (118,797) | ​ | (512,607) | ​ | (1,928,321)
Future development costs | ​ | (276,804) | ​ | (35,420) | ​ | (2,166) | ​ | (49,595) | ​ | (278,388) | ​ | (642,373)
Future income taxes | ​ | (858,700) | ​ | (5,594) | ​ | (1,409) | ​ | (2,251) | ​ | (143,416) | ​ | (1,011,370)
Undiscounted future net cash flows | ​ | 2,028,789 | ​ | 148,500 | ​ | 50,008 | ​ | 16,421 | ​ | 320,828 | ​ | 2,564,546
10% annual discount | ​ | (715,217) | ​ | (44,277) | ​ | (6,626) | ​ | (5,080) | ​ | (199,611) | ​ | (970,811)
Standardized measure of discounted future net cash flows | ​ | 1,313,572 | ​ | 104,223 | ​ | 43,382 | ​ | 11,341 | ​ | 121,217 | ​ | 1,593,735
Schedule of Changes in the Standardized Measure of Discounted Future Net Cash Flows from Proved Reserves | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Amounts in US$‘000 |  | Colombia |  | Chile |  | Brazil |  | Argentina |  | Peru |  | Total
Present value as of December 31, 2018 | ​ | 1,379,063 | ​ | 89,830 | ​ | 41,549 | ​ | 34,867 | ​ | 238,533 | ​ | 1,783,842
Sales of hydrocarbon, net of production costs | ​ | (411,528) | ​ | (14,284) | ​ | (17,289) | ​ | (13,280) | ​ | — | ​ | (456,381)
Net changes in sales price and production costs | ​ | (299,642) | ​ | 12,799 | ​ | 6,923 | ​ | (20,694) | ​ | (48,823) | ​ | (349,437)
Changes in estimated future development costs | ​ | (268,377) | ​ | (22,163) | ​ | 1,165 | ​ | 573 | ​ | (175,248) | ​ | (464,050)
Extensions and discoveries less related costs | ​ | 182,857 | ​ | 17,300 | ​ | — | ​ | — | ​ | — | ​ | 200,157
Development costs incurred | ​ | 69,694 | ​ | 4,023 | ​ | 445 | ​ | 4,325 | ​ | — | ​ | 78,487
Revisions of previous quantity estimates | ​ | 415,349 | ​ | 9,508 | ​ | 5,482 | ​ | (2,358) | ​ | 11,992 | ​ | 439,973
Net changes in income taxes | ​ | 23,398 | ​ | (2,025) | ​ | 729 | ​ | 3,760 | ​ | 51,917 | ​ | 77,779
Accretion of discount | ​ | 222,758 | ​ | 9,235 | ​ | 4,378 | ​ | 4,148 | ​ | 42,846 | ​ | 283,365
Present value as of December 31, 2019 | ​ | 1,313,572 | ​ | 104,223 | ​ | 43,382 | ​ | 11,341 | ​ | 121,217 | ​ | 1,593,735
Sales of hydrocarbon, net of production costs | ​ | (221,620) | ​ | (12,803) | ​ | 8,080 | ​ | (10,454) | ​ | — | ​ | (236,797)
Net changes in sales price and production costs | ​ | (975,716) | ​ | (117,895) | ​ | (14,580) | ​ | (113) | ​ | — | ​ | (1,108,304)
Changes in estimated future development costs | ​ | 514,317 | ​ | 20,870 | ​ | (19,606) | ​ | (2,587) | ​ | — | ​ | 512,994
Extensions and discoveries less related costs | ​ | 59,898 | ​ | 13,914 | ​ | — | ​ | — | ​ | — | ​ | 73,812
Development costs incurred | ​ | 69,694 | ​ | 10,743 | ​ | 394 | ​ | 445 | ​ | — | ​ | 81,276
Revisions of previous quantity estimates | ​ | (27,190) | ​ | (13,002) | ​ | 3,519 | ​ | (10) | ​ | — | ​ | (36,683)
Purchase or (Disposals) of Minerals in place | ​ | 90,315 | ​ | — | ​ | — | ​ | — | ​ | (121,217) | ​ | (30,902)
Net changes in income taxes | ​ | (281,264) | ​ | — | ​ | (290) | ​ | — | ​ | — | ​ | (281,554)
Accretion of discount | ​ | 217,227 | ​ | 10,982 | ​ | 4,479 | ​ | 1,359 | ​ | — | ​ | 234,047
Present value as of December 31, 2020 | ​ | 759,233 | ​ | 17,032 | ​ | 25,378 | ​ | (19) | ​ | — | ​ | 801,624
Sales of hydrocarbon, net of production costs | ​ | (516,844) | ​ | (11,520) | ​ | (15,677) | ​ | (16,855) | ​ | — | ​ | (560,896)
Net changes in sales price and production costs | ​ | 924,875 | ​ | 64,048 | ​ | 19,393 | ​ | (3,145) | ​ | — | ​ | 1,005,171
Changes in estimated future development costs | ​ | 96,364 | ​ | (18,731) | ​ | 861 | ​ | 20,674 | ​ | — | ​ | 99,168
Extensions and discoveries less related costs | ​ | 80,933 | ​ | — | ​ | — | ​ | (1,020) | ​ | — | ​ | 79,913
Development costs incurred | ​ | 87,877 | ​ | 4,111 | ​ | — | ​ | — | ​ | — | ​ | 91,988
Revisions of previous quantity estimates | ​ | (76,850) | ​ | (23,776) | ​ | 11,957 | ​ | 465 | ​ | — | ​ | (88,204)
Net changes in income taxes | ​ | (254,618) | ​ | — | ​ | (2,780) | ​ | 244 | ​ | — | ​ | (257,154)
Accretion of discount | ​ | 116,851 | ​ | 1,703 | ​ | 2,571 | ​ | (2) | ​ | — | ​ | 121,123
Present value as of December 31, 2021 | ​ | 1,217,821 | ​ | 32,867 | ​ | 41,703 | ​ | 342 | ​ | — | ​ | 1,292,733

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