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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Conocophillips Company | New Mexico | 390,072 BBLs | 1,792,923 MCF | Jan 2003 - Aug 2024 |
| Contango Resources LLC | Wyoming | 417,946 BBLs | 10,485,259 MCF | Feb 2020 - Aug 2024 |
| Contango Resources, Inc. | Montana | 20,566 BBLs | 73,406 MCF | Dec 2020 - Aug 2024 |
| Contango Resources, LLC | New Mexico | 8,185 BBLs | 51,587 MCF | Feb 2021 - Aug 2024 |
| Continental Resources Inc | Montana | 128,140 BBLs | 292,588 MCF | Jan 1991 - Jul 2024 |
| Continental Resources Inc | Wyoming | 614,164 BBLs | 2,675,235 MCF | Jan 1993 - Aug 2024 |
| Continental Resources Inc. | Louisiana | 1,490 BBLs | 342 MCF | Sep 1995 - Jun 2024 |
| Continental Resources, Inc. | North Dakota | 5,096,765 BBLs | 19,773,263 MCF | Sep 1978 - Aug 2024 |
| Cook Inlet Energy, LLC. | Alaska | 67,516 BBLs | 27,738 MCF | Dec 2009 - Aug 2024 |
| Coral Production Corporation | Kansas | 2,793 BBLs | 0 MCF | Jan 1980 - Jun 2024 |
| Core Energy LLC | Michigan | 34,607 BBLs | 13,483 MCF | Jan 2006 - Aug 2024 |
| Cornerstone Natural Resources LLC | North Dakota | 9,739 BBLs | 18,282 MCF | Jan 2007 - Aug 2024 |
| Coteau Energy LLC | Louisiana | 11,991 BBLs | 74,072 MCF | Aug 2021 - Jun 2024 |
| Crawford Production Company | Kansas | 2,175 BBLs | 767 MCF | Jan 1980 - Jun 2024 |
| Crescent Pass Energy, LLC | Louisiana | 77 BBLs | 109,842 MCF | Aug 2018 - Jun 2024 |
| Crestone Peak Resources Operating LLC | Colorado | 1,000,380 BBLs | 6,829,233 MCF | Aug 2016 - Jul 2024 |
| Crosbys Creek Oil & Gas, LLC | Alabama | 4,259 BBLs | 24,650 MCF | Apr 1982 - Jun 2024 |
| Cross Bar Energy, LLC | Kansas | 2,928 BBLs | 0 MCF | Jan 1980 - Jun 2024 |
| Cross Timbers Energy, LLC | New Mexico | 30,273 BBLs | 407,175 MCF | Jul 2013 - Jul 2024 |
| Crowheart Energy LLC | Wyoming | 184,551 BBLs | 7,934,862 MCF | Feb 2018 - Jul 2024 |
| Crown Energy Company | Kansas | 1,922 BBLs | 0 MCF | Jan 1980 - Jun 2024 |
| Curt'S Oil Operation, LLC | Kansas | 5,827 BBLs | 0 MCF | Jan 2010 - Jun 2024 |
| CWT Operating, LLC | Montana | 1,475 BBLs | 464 MCF | Dec 2021 - Jul 2024 |
| Cypress Operating, Inc | Arkansas | 2,357 BBLs | 0 MCF | Jan 2001 - Jul 2024 |
| D90 Energy LLC | Wyoming | 2,505 BBLs | 22,032 MCF | Jan 2020 - Jul 2024 |
| Dakota Crude, Inc. | North Dakota | 1,474 BBLs | 0 MCF | May 2003 - Aug 2024 |
| Dale E. Jackson Production Co. | Kansas | 2,169 BBLs | 0 MCF | Jan 1980 - Jun 2024 |
| Darrah Oil Company LLC | Colorado | 1,484 BBLs | 0 MCF | Oct 2018 - Aug 2024 |
| Darrah Oil Company, LLC | Kansas | 20,098 BBLs | 5,722 MCF | Jan 2010 - Jun 2024 |
| Daube Company The | Wyoming | 7,180 BBLs | 450 MCF | Jan 1990 - Aug 2024 |
| Daylight Petroleum LLC | Louisiana | 8,383 BBLs | 32,179 MCF | Feb 2019 - Jul 2024 |
| Daystar Petroleum, Inc. | Kansas | 11,067 BBLs | 14,712 MCF | Jan 1980 - Jun 2024 |
| De Soto Oil Properties, LLC | Alabama | 1,758 BBLs | 1,299 MCF | May 1988 - Jun 2024 |
| Delta Royalties LLC | Louisiana | 2,421 BBLs | 5,625 MCF | Dec 2019 - Jun 2024 |
| Denbury Onshore LLC | Wyoming | 220,254 BBLs | 136,301 MCF | Jan 2011 - Jul 2024 |
| Denbury Onshore, LLC | Alabama | 21,139 BBLs | 0 MCF | Jan 1956 - Jun 2024 |
| Denbury Onshore, LLC | Louisiana | 64,360 BBLs | 76,316 MCF | Jan 2004 - Jun 2024 |
| Denbury Onshore, LLC | Mississippi | 154,009 BBLs | 2,676,715 MCF | Jun 1971 - Jul 2024 |
| Denbury Onshore, LLC | Montana | 120,245 BBLs | 35,601 MCF | Jan 2011 - Jul 2024 |
| Denbury Onshore, LLC | North Dakota | 88,351 BBLs | 23,335 MCF | Oct 2007 - Aug 2024 |
| Deutsch Oil Company | Kansas | 3,699 BBLs | 1,916 MCF | Jan 1980 - Jun 2024 |
| Devon Energy Production Company LP | Wyoming | 571,245 BBLs | 998,826 MCF | Jan 1978 - Aug 2024 |
| Devon Energy Production Company, LP | New Mexico | 5,613,485 BBLs | 27,280,359 MCF | Jan 1993 - Jul 2024 |
| Dews Production LLC | Arkansas | 2,454 BBLs | 2,023 MCF | Nov 2016 - Jun 2024 |
| DGH Oil, LLC | Kansas | 4,151 BBLs | 0 MCF | Jan 1980 - Jun 2024 |
| Diamond Oil & Gas LLC | Wyoming | 1,603 BBLs | 11,768 MCF | Oct 2011 - Aug 2024 |
| Diehl Oil Inc | Kansas | 2,750 BBLs | 0 MCF | Jan 1980 - Jun 2024 |
| Diversified Production LLC | Louisiana | 13,745 BBLs | 3,480,756 MCF | May 2021 - Jun 2024 |
| Dixon Operating Company, LLC | Kansas | 16,157 BBLs | 47,936 MCF | Jan 2010 - Jun 2024 |
| DJR Operating, LLC | New Mexico | 436,070 BBLs | 1,297,830 MCF | Nov 2017 - Aug 2024 |