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DISCLOSURES ABOUT OIL AND GAS PRODUCING ACTIVITIES (UNAUDITED) - Average Wellhead Prices Used in Determining Future Net Revenues (Details) | 12 Months Ended
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Dec. 31, 2021 $ / bbl $ / MMcf | Dec. 31, 2020 $ / bbl $ / MMcf | Dec. 31, 2019 $ / MMcf $ / bbl
Oil contracts |  |  |
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items] |  |  |
Average sales price (in dollars per Bbl for oil and dollars per Mcf for gas) | 61.60 | 34.96 | 51.22
Gas contracts |  |  |
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items] |  |  |
Average sales price (in dollars per Bbl for oil and dollars per Mcf for gas) | $ / MMcf | 2.60 | 0.95 | 1.44
Natural gas liquids (per Bbl) |  |  |
Oil and Gas, Average Sale Price and Production Cost Per Unit [Line Items] |  |  |
Average sales price (in dollars per Bbl for oil and dollars per Mcf for gas) | 30.60 | 6.12 | 10.07

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- Definition Sales price per unit of oil and gas produced. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1204 -Paragraph (b) -Subparagraph (1) + Details
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