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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| O'Brien Energy Resources Corp. | Kansas | 3,308 BBLs | 35,329 MCF | May 2008 - Dec 2023 |
| O'Brien Energy Resources Corporation | Wyoming | 1,332 BBLs | 0 MCF | Feb 2002 - Feb 2024 |
| Oasis Petroleum North America LLC | Montana | 48,656 BBLs | 54,943 MCF | Mar 2007 - Feb 2024 |
| Oasis Petroleum North America LLC | North Dakota | 2,389,965 BBLs | 6,815,428 MCF | May 2007 - Feb 2024 |
| Occidental Permian LTD | New Mexico | 427,610 BBLs | 946,996 MCF | Mar 1997 - Feb 2024 |
| Oil Mountain Energy Inc | Wyoming | 1,322 BBLs | 0 MCF | Oct 2018 - Feb 2024 |
| Oil Producers, Inc. Of Kansas | Kansas | 8,044 BBLs | 60,864 MCF | Jan 1980 - Dec 2023 |
| Oildigger Resources Fund L LLLP | Wyoming | 9,916 BBLs | 6,690 MCF | Sep 2016 - Feb 2024 |
| Oilfield Salvage & Service Company | Wyoming | 2,458 BBLs | 3,481 MCF | Jan 1978 - Feb 2024 |
| Oleum Energy LLC | New Mexico | 4,092 BBLs | 0 MCF | Aug 2022 - Jan 2024 |
| Olipdp II, LLC | Louisiana | 19,146 BBLs | 98,868 MCF | Jun 2022 - Dec 2023 |
| Opal Operating Company LLC | New Mexico | 3,707 BBLs | 239,343 MCF | Sep 2021 - Jan 2024 |
| Organic Energy Company LLC | Colorado | 2,481 BBLs | 2,513 MCF | Nov 2020 - Feb 2024 |
| Ovintiv USA Inc | Wyoming | 5 BBLs | 128,561 MCF | Mar 2001 - Feb 2024 |
| Owens Oil Company, LLC | Kansas | 2,628 BBLs | 0 MCF | Jan 2010 - Dec 2023 |
| Owens Petroleum LLC | Kansas | 2,466 BBLs | 0 MCF | Jan 1980 - Dec 2023 |
| Own Resources Operating LLC | Colorado | 71 BBLs | 893,789 MCF | Jul 2018 - Feb 2024 |
| Own Resources Operating LLC | Kansas | 168 BBLs | 58,488 MCF | Jan 2010 - Dec 2023 |
| Oxy USA Inc | Colorado | 0 BBLs | 246,457 MCF | Jan 1999 - Feb 2024 |
| Oxy USA Inc | New Mexico | 3,695,241 BBLs | 19,011,544 MCF | Jan 1993 - Jan 2024 |
| Oxy USA Inc. | Kansas | 1,349 BBLs | 14,421 MCF | Jan 1980 - Dec 2023 |
| Oxy USA WTP Limited Partnership | New Mexico | 45,764 BBLs | 427,162 MCF | Jan 2001 - Feb 2024 |
| P O & G Operating LLC | Wyoming | 10,341 BBLs | 10,275 MCF | Jan 2017 - Feb 2024 |
| P. O. & G. Operating, LLC | Mississippi | 2,541 BBLs | 0 MCF | Dec 1976 - Jan 2024 |
| P.O. & G. Operating, LLC | North Dakota | 2,841 BBLs | 1,025 MCF | Jun 2018 - Feb 2024 |
| Padco LLC | Colorado | 1,357 BBLs | 0 MCF | Jan 1999 - Feb 2024 |
| Page Development, L.L.C. | Louisiana | 2,494 BBLs | 0 MCF | May 2004 - Jan 2024 |
| Palmer Oil, Inc. | Kansas | 4,798 BBLs | 34,982 MCF | Nov 2005 - Dec 2023 |
| Palmer Petroleum, Inc. | Louisiana | 3,343 BBLs | 2,995 MCF | Apr 1981 - Dec 2023 |
| Paloma Natural Gas, LLC | Louisiana | 0 BBLs | 14,263,799 MCF | Mar 2022 - Dec 2023 |
| Palomino Petroleum, Inc. | Kansas | 38,054 BBLs | 6,093 MCF | Jan 1980 - Dec 2023 |
| Pan-Ok Production Company | Louisiana | 11,237 BBLs | 393,395 MCF | Aug 1986 - Dec 2023 |
| Pantera Energy Company | Kansas | 21,479 BBLs | 119,177 MCF | Jan 2010 - Dec 2023 |
| Paradigm Energy LLC | Louisiana | 2,421 BBLs | 0 MCF | Dec 2014 - Dec 2023 |
| Pathfinder Energy Inc | Wyoming | 2,011 BBLs | 10 MCF | Jun 2000 - Feb 2024 |
| Patterson Energy LLC | Kansas | 23,535 BBLs | 0 MCF | Jan 2010 - Dec 2023 |
| Patterson Operations LLC | Kansas | 1,317 BBLs | 0 MCF | Apr 1982 - Dec 2023 |
| Paul Bowman Oil Trust | Kansas | 1,470 BBLs | 0 MCF | Jan 1980 - Dec 2023 |
| Paul Rankin Inc. | North Dakota | 1,833 BBLs | 78 MCF | May 2002 - Feb 2024 |
| Pauley Oil | Kansas | 3,498 BBLs | 0 MCF | Jan 1980 - Dec 2023 |
| Paxton Resources LLC | Michigan | 11,476 BBLs | 64,230 MCF | Dec 1995 - Feb 2024 |
| Pay Ventures, L.L.C. | Louisiana | 1,912 BBLs | 0 MCF | May 2006 - Jan 2024 |
| PDS Resources LLC | Wyoming | 4,168 BBLs | 7,272 MCF | Aug 2023 - Feb 2024 |
| Peak Operating Co. | Louisiana | 3,405 BBLs | 83,989 MCF | Jan 2003 - Dec 2023 |
| Peak Operating LLC | Kansas | 2,108 BBLs | 0 MCF | Jan 2010 - Dec 2023 |
| Peak Powder River Resources LLC | Wyoming | 105,891 BBLs | 410,728 MCF | Jan 2013 - Jan 2024 |
| Pennington Oil & Gas Int, LLC | Louisiana | 1,612 BBLs | 1,197 MCF | May 2001 - Dec 2023 |
| Penroc Oil Corp | New Mexico | 10,676 BBLs | 131,702 MCF | Jan 1993 - Jan 2024 |
| Perdido Energy Louisiana, LLC | Louisiana | 108,333 BBLs | 343,581 MCF | Dec 2017 - Dec 2023 |
| Permian Resources Operating, LLC | New Mexico | 1,372,955 BBLs | 3,503,595 MCF | Jul 2017 - Feb 2024 |