2020 2021 Oil 2022 Oil Gas Gas Oil Year ended Dec. 31 779 234 783 Gas 171 335 10 12 15 31 11 724 Beginning of year 21 30 25 23 15 22 Revisions of previous estimates 0 0 12 12 50 Improved recovery 0 (12) (20) (99) (70) 24 Purchases of reserves-in-place (12) 69 78 90 42 (24) Sales of reserves-in-place 6 (104) 1 (68) 150 Extensions & discoveries (25) (24) 234 783 335 724 Production 251 870 End of year totals Net Wells Gross Wells Year 750 2,010 2020 840 1,910 2021 900 2,050 2022