Number of Wells Resulting in Area Production Decline

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Period of Production of Wells with Decline in Production

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- Definition

Proved Developed and Undeveloped Reserves, (Energy), Revision of Previous Estimate, Change in Pricing

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Proved Developed and Undeveloped Reserves, (Energy), Revision of Previous Estimate, Change in Well Performance

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- Definition

Proved Developed and Undeveloped Reserves, Net (Energy), Adjustment for Change in Accounting

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Proved Developed and Undeveloped Reserves, Net, Percent Period Increase (Decrease)

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- Definition

Energy measure of increase in quantity of proved reserve of oil and gas resulting from the extension of the proved acreage of previously discovered reservoir or discovery of new field with proved reserve or of new reservoir of proved reserve in old field, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 5
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61831-109447

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- Definition

Energy measure of increase in quantity of proved reserve of oil and gas resulting from purchase of mineral in place, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61831-109447

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- Definition

Energy measure of increase (decrease) in quantity of proved reserve of oil and gas related to revision of a previous estimate resulting from new information, except for an increase in proved acreage, or change in economic factors, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61831-109447

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Additions to proved reserves that result from (1) extension of the proved acreage of previously discovered (old) reservoirs through additional drilling in periods after discovery and (2) discovery of new fields with proved reserves or of new reservoirs of proved reserves in old fields.

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Revisions represent changes in previous estimates of proved reserves, either upward or downward, resulting from new information (except for an increase in proved acreage) normally obtained from development drilling and production history or resulting from change in economic factors.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 5
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61831-109447

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- Definition

Energy measure of decrease in quantity of proved reserve of oil and gas resulting from sale of mineral in place, stated in a unit of energy. For example, but not limited to, barrel of oil equivalents (BOE) or one thousand cubic feet of natural gas equivalent (Mcfe).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 932
-SubTopic 235
-Section 50
-Paragraph 5
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=68064819&loc=d3e61831-109447

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Supplemental Information on Oil and Natural Gas Producing Activities (Unaudited) - Narrative (Details) Mcf in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2016 MBoe MBbls Mcf	Oct. 01, 2016 MBoe MBbls Mcf	Dec. 31, 2017 MBoe well MBbls Mcf	Dec. 31, 2016 MBoe	Dec. 31, 2015 MBoe MMBoe MBbls Mcf
Reserve Quantities [Line Items]
Upward revision of estimates due to extensions (MBoe) \| MBoe				7,800
Decrease in reserves due to sale (MBoe) \| MBoe				24,600
Revision of previous estimates (MBoe) \| MBoe				(105,400)
Revision of previous estimates due to changes in well performance (MBoe) \| MBoe				94,700
Revision of previous estimates due to changes in commodity pricing (MBoe) \| MBoe				12,100
Decrease in reserves due to changes in accounting \| MBoe				19,100
Natural Gas and LNG
Reserve Quantities [Line Items]
Percent share of downward revision				85.00%
Oil
Reserve Quantities [Line Items]
Percent share of downward revision				15.00%
Mid-Continent
Reserve Quantities [Line Items]
Minimum number of wells in areas with decline in production \| well			3
Number of years wells in production seeing decline in production			2 years
Successor
Reserve Quantities [Line Items]
Upward revision of estimates due to extensions (MBoe) \| MBoe	5,034		19,373
Decrease in reserves due to sale (MBoe) \| MBoe			1,909
Revision of previous estimates (MBoe) \| MBoe	25,270		10,879
Acquisitions of new reserves (MBoe) \| MBoe			202
Successor \| Oil
Reserve Quantities [Line Items]
Extensions and discoveries (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| MBbls	2,868		12,446
Positive (negative) Revisions of previous estimates (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| MBbls	23,978		804
Successor \| Natural Gas
Reserve Quantities [Line Items]
Extensions and discoveries (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| Mcf	10,309		30,080
Positive (negative) Revisions of previous estimates (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| Mcf	915		44,679
Successor \| NGL
Reserve Quantities [Line Items]
Extensions and discoveries (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| MBbls	448		1,914
Positive (negative) Revisions of previous estimates (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| MBbls	1,139		2,628
Predecessor
Reserve Quantities [Line Items]
Upward revision of estimates due to extensions (MBoe) \| MBoe		2,785			45,809
Decrease in reserves due to sale (MBoe) \| MBoe		24,598
Revision of previous estimates (MBoe) \| MBoe		(130,709)			(234,610)
Acquisitions of new reserves (MBoe) \| MBoe					27,566
Predecessor \| Oil
Reserve Quantities [Line Items]
Extensions and discoveries (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| MBbls		987			9,741
Positive (negative) Revisions of previous estimates (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| MBbls		(39,973)			(70,708)
Predecessor \| Natural Gas
Reserve Quantities [Line Items]
Extensions and discoveries (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| Mcf		7,955			160,865
Positive (negative) Revisions of previous estimates (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| Mcf		(415,568)			(759,106)
Predecessor \| NGL
Reserve Quantities [Line Items]
Extensions and discoveries (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| MBbls		472			9,257
Positive (negative) Revisions of previous estimates (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| MBbls		(21,475)			(37,384)
Predecessor \| Lower Commodity Price \| Oil
Reserve Quantities [Line Items]
Positive (negative) Revisions of previous estimates (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| MBbls					(54,000)
Predecessor \| Lower Commodity Price \| Natural Gas
Reserve Quantities [Line Items]
Positive (negative) Revisions of previous estimates (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| Mcf					(687,000)
Predecessor \| Lower Commodity Price \| NGL
Reserve Quantities [Line Items]
Positive (negative) Revisions of previous estimates (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| MBbls					(36,000)
Predecessor \| Mid-Continent \| Oil
Reserve Quantities [Line Items]
Extensions and discoveries (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| MBbls					9,700
Positive (negative) Revisions of previous estimates (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| MBbls					(16,000)
Predecessor \| Mid-Continent \| Natural Gas
Reserve Quantities [Line Items]
Extensions and discoveries (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| Mcf					160,900
Positive (negative) Revisions of previous estimates (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| Mcf					(74,000)
Predecessor \| Mid-Continent \| NGL
Reserve Quantities [Line Items]
Extensions and discoveries (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| MBbls					9,300
Positive (negative) Revisions of previous estimates (in MBbls for Oil and NGLs/Mcf for Natural Gas) \| MBbls					(1,000)
Predecessor \| North Park Basin, Jackson County, Colorado [Member]
Reserve Quantities [Line Items]
Acquisitions of new reserves (MBoe) \| MMBoe					27.6