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SUPPLEMENTAL INFORMATION ON OIL AND GAS EXPLORATION AND PRODUCTION ACTIVITIES (UNAUDITED) (Tables)

12 Months Ended

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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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.

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Tabular disclosure of the future net cash flows relating to proved oil and gas reserves and oil and gas subject to purchase under long-term agreements in which the enterprise participates in the operation of the properties on which the oil and gas is located or otherwise serves as the producer. This information is presented in aggregate and for each geographic area for which reserve quantities are disclosed.

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Tabular disclosure of aggregate capitalized costs relating to an enterprise's oil and gas producing activities and the aggregate related accumulated depreciation, depletion, amortization, and valuation allowances.

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