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SUPPLEMENTAL INFORMATION ON OIL AND GAS EXPLORATION AND PRODUCTION ACTIVITIES (UNAUDITED) (Tables) | 12 Months Ended
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Dec. 31, 2021
Extractive Industries [Abstract] |
Schedule of capitalized costs related to oil and gas producing activities | Capitalized Costs Related to Oil and Gas Producing Activities (in thousands)
| Year ended December 31,
| Successor |  |  | Predecessor
| 2021 |  |  | 2020
Proved properties | $ | 1,917,833 |  |  |  | $ | 9,359,866 |
Unproved properties | 211,007 |  |  |  | 1,457,043 |
Total oil and natural gas properties | 2,128,840 |  |  |  | 10,816,909 |
Accumulated depreciation, depletion, amortization and impairment | (277,331) |  |  |  | (8,778,759) |
Net capitalized costs | $ | 1,851,509 |  |  |  | $ | 2,038,150 |
Schedule of cost incurred in oil and gas property acquisition and development activities | Costs Incurred in Oil and Gas Property Acquisition and Development Activities (in thousands)
| Successor |  |  | Predecessor
| Period from May 18, 2021 through December 31, 2021 |  |  | Period from January 1, 2021 through May 17, 2021 |  | Year Ended December 31, 2020 |  | Year Ended December 31, 2019
Acquisition | $ | 13,411 |  |  |  | $ | 3,922 |  |  | $ | 15,260 |  |  | $ | 37,598 |
Development | 191,193 |  |  |  | 112,986 |  |  | 276,622 |  |  | 594,673 |
Exploratory | — |  |  |  | — |  |  | — |  |  | 9,762 |
Total | $ | 204,604 |  |  |  | $ | 116,908 |  |  | $ | 291,882 |  |  | $ | 642,033 |
Schedule of results of operations for oil and gas production activities | The results of operations exclude general office overhead and interest expense attributable to oil and gas production.
| Successor |  |  | Predecessor
| Period from May 18, 2021 through December 31, 2021 |  |  | Period from January 1, 2021 through May 17, 2021 |  | Year Ended December 31, 2020 |  | Year Ended December 31, 2019
Revenues | $ | 1,092,584 |  |  |  | $ | 410,276 |  |  | $ | 801,251 |  |  | $ | 1,354,766 |
Production costs | (274,428) |  |  |  | (192,959) |  |  | (537,609) |  |  | (620,412) |
Depletion | (159,518) |  |  |  | (60,831) |  |  | (229,702) |  |  | (539,379) |
Impairment | (117,813) |  |  |  | — |  |  | (1,357,099) |  |  | (2,039,770) |
Income tax benefit (expense) | 39 |  |  |  | 7,968 |  |  | (7,290) |  |  | 7,563 |
Results of operations from producing activities | $ | 540,864 |  |  |  | $ | 164,454 |  |  | $ | (1,330,449) |  |  | $ | (1,837,232) |
Depletion per Mcf of gas equivalent (Mcfe) | $ | 0.69 |  |  |  | $ | 0.45 |  |  | $ | 0.61 |  |  | $ | 1.08 |
Schedule of oil and gas reserves | These estimates are reviewed annually and revised, either upward or downward, as warranted by additional performance data.
| Oil (MMBbl) |  | Natural Gas (Bcf) |  | NGL (MMBbl) |  | Natural Gas Equivalent (Bcfe)
Proved Reserves |  |  |  |  |  |  |
December 31, 2018 (Predecessor) | 21 |  |  | 4,134 |  |  | 81 |  |  | 4,743 |
Purchases of reserves | — |  |  | — |  |  | — |  |  | — |
Extensions and discoveries | 4 |  |  | 997 |  |  | 13 |  |  | 1,097 |
Sales of reserves | (2) |  |  | (63) |  |  | — |  |  | (77) |
Revisions of prior reserve estimates | (2) |  |  | (562) |  |  | (27) |  |  | (734) |
Current production | (2) |  |  | (458) |  |  | (5) |  |  | (502) |
December 31, 2019 (Predecessor) | 18 |  |  | 4,048 |  |  | 62 |  |  | 4,528 |
Purchases of reserves | — |  |  | — |  |  | — |  |  | — |
Extensions and discoveries | 1 |  |  | 216 |  |  | 3 |  |  | 240 |
Sales of reserves | — |  |  | (74) |  |  | — |  |  | (75) |
Revisions of prior reserve estimates | (4) |  |  | (1,564) |  |  | (23) |  |  | (1,725) |
Current production | (2) |  |  | (345) |  |  | (4) |  |  | (380) |
December 31, 2020 (Predecessor) | 13 |  |  | 2,281 |  |  | 38 |  |  | 2,588 |
Purchases of reserves | — |  |  | — |  |  | — |  |  | — |
Extensions and discoveries | 2 |  |  | 617 |  |  | 11 |  |  | 695 |
Sales of reserves | — |  |  | — |  |  | — |  |  | — |
Revisions of prior reserve estimates | 2 |  |  | 913 |  |  | 9 |  |  | 982 |
Current production | (2) |  |  | (333) |  |  | (4) |  |  | (366) |
December 31, 2021 (Successor) | 16 |  |  | 3,478 |  |  | 54 |  |  | 3,898 |
Proved developed reserves |  |  |  |  |  |  |
December 31, 2019 (Predecessor) | 8 |  |  | 1,757 |  |  | 30 |  |  | 1,984 |
December 31, 2020 (Predecessor) | 7 |  |  | 1,358 |  |  | 22 |  |  | 1,527 |
December 31, 2021 (Successor) | 8 |  |  | 1,928 |  |  | 31 |  |  | 2,165 |
Proved undeveloped reserves |  |  |  |  |  |  |
December 31, 2019 (Predecessor) | 10 |  |  | 2,291 |  |  | 32 |  |  | 2,544 |
December 31, 2020 (Predecessor) | 7 |  |  | 923 |  |  | 16 |  |  | 1,061 |
December 31, 2021 (Successor) | 8 |  |  | 1,550 |  |  | 22 |  |  | 1,733 |
Totals may not sum or recalculate due to rounding. |  |  |  |  |  |  |
Schedule of standardized measure of discounted future net cash flows relating to proved oil and gas reserves |
| Year ended December 31,
| Successor |  |  | Predecessor
| 2021 |  |  | 2020 |  | 2019
Future cash flows | $ | 14,938 |  |  |  | $ | 4,079 |  |  | $ | 10,451 |
Future development and abandonment costs | (1,141) |  |  |  | (652) |  |  | (2,058) |
Future production costs | (5,227) |  |  |  | (2,325) |  |  | (4,513) |
Future production taxes | (336) |  |  |  | (137) |  |  | (333) |
Future income taxes | (437) |  |  |  | — |  |  | — |
Future net cash flows | 7,797 |  |  |  | 965 |  |  | 3,547 |
10% discount to reflect timing of cash flows | (3,659) |  |  |  | (425) |  |  | (1,844) |
Standardized measure of discounted future net cash flows | $ | 4,138 |  |  |  | $ | 540 |  |  | $ | 1,703 |
Schedule of changes in standardized measure of discounted future net cash flows relating to proved oil and gas reserves | Changes in Standardized Measure of Discounted Future Net Cash Flows Relating to Proved Oil and Gas Reserves The principal source of change in the standardized measure of discounted future net cash flows relating to proved reserves is presented in the table below (in millions):
| Year ended December 31,
| Successor |  |  | Predecessor
| 2021 |  |  | 2020 |  | 2019
Sales and transfers of oil and gas produced, net of production costs | $ | (1,035) |  |  |  | $ | (264) |  |  | $ | (734) |
Net changes in prices, production costs, and development costs | 2,596 |  |  |  | (954) |  |  | (1,372) |
Acquisition of oil and gas reserves in place | — |  |  |  | — |  |  | — |
Extensions and discoveries | 639 |  |  |  | 38 |  |  | 388 |
Previously estimated development costs incurred during the period | 149 |  |  |  | 215 |  |  | 406 |
Revisions of previous quantity estimates, less related production costs | 858 |  |  |  | (255) |  |  | (321) |
Sales of oil and gas reserves in place | (1) |  |  |  | (6) |  |  | (49) |
Accretion of discount | 54 |  |  |  | 170 |  |  | 298 |
Net changes in income taxes | (178) |  |  |  | — |  |  | 425 |
Change in production rates and other | 516 |  |  |  | (109) |  |  | (319) |
Total change in standardized measure of discounted future net cash flows | $ | 3,598 |  |  |  | $ | (1,165) |  |  | $ | (1,278) |

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- Definition Tabular disclosure of the net quantities of an enterprise's interests in proved developed and undeveloped reserves of (a) crude oil (including condensate and natural gas liquids), (b) natural gas (including coal bed methane), (c) synthetic oil, (d) synthetic gas, and (e) other nonrenewable natural resources that are intended to be upgraded during the period as of the beginning of the period, changes in quantities during the period, and as of the end of the period. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Form 20-F -Section Item 18 -Subsection Instruction 2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=123377692&loc=d3e61884-109447 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=123377692&loc=d3e61858-109447 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=123377692&loc=d3e61872-109447 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=123377692&loc=d3e61831-109447 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=123377692&loc=d3e61797-109447 Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=123377692&loc=d3e61869-109447 + Details
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