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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Beard Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Mar 1993 |
| Beartooth Oil And Gas Co | Wyoming | 109 BBLs | 0 MCF | Jun 1984 - Apr 2025 |
| Becker Clyde M Jr | Wyoming | 0 BBLs | 0 MCF | Apr 1996 - Apr 2004 |
| Beersheba Oil | Wyoming | 0 BBLs | 0 MCF | Jan 1983 - Oct 1985 |
| Belco Energy Corporation | Wyoming | 0 BBLs | 0 MCF | Aug 1993 - Dec 2001 |
| Belden & Blake Corporation | Wyoming | 0 BBLs | 0 MCF | Jan 1982 - Jan 1986 |
| Bell Resources Inc | Wyoming | 0 BBLs | 0 MCF | Sep 1987 - Jun 2016 |
| Belleview Capital Corporation | Wyoming | 0 BBLs | 0 MCF | Feb 1993 - Apr 2002 |
| Bellevue Resources Inc | Wyoming | 0 BBLs | 0 MCF | Sep 1989 - Feb 2009 |
| Benchmark Energy LLC | Wyoming | 0 BBLs | 0 MCF | Dec 2010 - Dec 2016 |
| Bennett Petroleum Corporation | Wyoming | 0 BBLs | 0 MCF | Mar 1985 - Jun 1985 |
| Benson-Montin-Greer DRLG Corp | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Jan 2010 |
| Berco Resources LLC | Wyoming | 0 BBLs | 0 MCF | Jul 1987 - Sep 2009 |
| Beren Corporation | Wyoming | 1,615 BBLs | 0 MCF | Jan 1978 - May 2025 |
| Berenergy Corporation | Wyoming | 2,217 BBLs | 3,651 MCF | Jan 1987 - Apr 2025 |
| Bernard Albert | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Aug 1987 |
| Berry Petroleum Company | Wyoming | 0 BBLs | 0 MCF | Sep 2003 - May 2007 |
| Beta Oil Company Inc | Wyoming | 0 BBLs | 0 MCF | May 1981 - Feb 1990 |
| Betop Inc | Wyoming | 0 BBLs | 0 MCF | Sep 1987 - Dec 1996 |
| BHB Oil Partners LLC | Wyoming | 0 BBLs | 0 MCF | Mar 2007 - Apr 2025 |
| BHP Petroleum (USA) Inc | Wyoming | 0 BBLs | 0 MCF | Oct 1984 - Mar 1993 |
| BHP Petroleum Company Inc | Wyoming | 0 BBLs | 0 MCF | Jul 1986 - Dec 1990 |
| Big Basin Petroleum LLC | Wyoming | 0 BBLs | 0 MCF | Jan 1998 - Oct 2008 |
| Big Chief Exploration | Wyoming | 0 BBLs | 0 MCF | Oct 1979 - Oct 1993 |
| Big Muddy Operating LLC | Wyoming | 3,299 BBLs | 0 MCF | Oct 2016 - Apr 2025 |
| Big Piney Oil & Gas Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Sep 1992 |
| Big Wells Energy Corp | Wyoming | 0 BBLs | 0 MCF | Nov 1992 - Feb 1997 |
| Bill Barrett Corporation | Wyoming | 0 BBLs | 0 MCF | Mar 2002 - Nov 2015 |
| Bing Harold C | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Jun 1992 |
| Bird Oil Corporation | Wyoming | 0 BBLs | 0 MCF | Feb 1981 - Jul 1992 |
| Bison IV Operating LLC | Wyoming | 28,442 BBLs | 30,156 MCF | Mar 2023 - Apr 2025 |
| Bison Operating LLC | Wyoming | 6,540 BBLs | 3,127 MCF | Nov 2022 - Apr 2025 |
| Bissell Oil Operating Co Inc | Wyoming | 0 BBLs | 0 MCF | Nov 1996 - Jan 2005 |
| Bitterroot Energy Partners LLC | Wyoming | 472 BBLs | 572 MCF | Jan 2023 - Apr 2025 |
| Black Bank LLC | Wyoming | 212 BBLs | 0 MCF | Dec 2021 - Apr 2025 |
| Black Bear Oil Corporation | Wyoming | 10,455 BBLs | 37,661 MCF | May 2003 - Apr 2025 |
| Black Butte Gas Company | Wyoming | 0 BBLs | 0 MCF | Feb 1991 - Dec 2013 |
| Black Coal Resources Company | Wyoming | 0 BBLs | 0 MCF | Jan 1986 - Dec 1991 |
| Black Diamond Energy Inc | Wyoming | 0 BBLs | 0 MCF | Feb 2001 - May 2016 |
| Black Diamond Energy Of Delaware Inc | Wyoming | 0 BBLs | 0 MCF | Apr 2007 - May 2025 |
| Black Gold Services Inc | Wyoming | 0 BBLs | 0 MCF | Jan 2021 - Mar 2025 |
| Black Hawk Resources Corporation | Wyoming | 0 BBLs | 0 MCF | May 1982 - Mar 1986 |
| Black Hills Exploration & Production Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Mar 2018 |
| Black Hills Oil & Gas Inc | Wyoming | 0 BBLs | 0 MCF | Mar 1981 - May 1984 |
| Black Hills Wyoming Gas LLC | Wyoming | 0 BBLs | 89 MCF | Apr 2007 - Apr 2025 |
| Black Island Resources USA Inc | Wyoming | 0 BBLs | 0 MCF | Jul 2003 - Apr 2011 |
| Black Jack Oil Co Inc | Wyoming | 0 BBLs | 0 MCF | Oct 1980 - Feb 1988 |
| Black Thunder Oil LLC | Wyoming | 578 BBLs | 0 MCF | Aug 2015 - Apr 2025 |
| Blackjack Oil Inc | Wyoming | 0 BBLs | 0 MCF | Apr 2000 - Apr 2012 |
| Blackstone Energy Inc | Wyoming | 0 BBLs | 0 MCF | Mar 1996 - Nov 2010 |