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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| River Gas Corporation | Wyoming | 0 BBLs | 0 MCF | Sep 1997 - Dec 1999 |
| Rki Exploration & Production LLC | Wyoming | 0 BBLs | 0 MCF | Oct 2010 - Oct 2015 |
| Rme Petroleum Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Feb 2003 |
| Robb Ronald R | Wyoming | 0 BBLs | 0 MCF | Apr 2004 - May 2011 |
| Robert Hawkins Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Jul 2023 |
| Roberts S E | Wyoming | 0 BBLs | 0 MCF | Feb 2001 - Mar 2001 |
| Rochelle Oil & Gas | Wyoming | 0 BBLs | 0 MCF | Jun 1998 - Mar 2024 |
| Rock Creek Resources LLC | Wyoming | 0 BBLs | 0 MCF | Sep 2012 - Dec 2021 |
| Rock Oil Corporation | Wyoming | 0 BBLs | 0 MCF | Nov 1983 - Dec 1988 |
| Rock River Operating Inc | Wyoming | 2,274 BBLs | 4,415 MCF | Apr 1994 - Jan 2026 |
| Rockies Resources Holdings LLC | Wyoming | 198,366 BBLs | 291,716 MCF | Sep 2019 - Jan 2026 |
| Rocky Mountain Gas Inc | Wyoming | 0 BBLs | 0 MCF | Apr 2000 - Nov 2009 |
| Rocky Mountain Methane Company | Wyoming | 0 BBLs | 0 MCF | Apr 1992 - Aug 2003 |
| Rocky Mountain Oilfinders Inc | Wyoming | 0 BBLs | 0 MCF | Aug 1986 - Apr 1991 |
| Rocky Mountain Operating Co Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1998 - May 2010 |
| Roemer Oil Company | Wyoming | 0 BBLs | 0 MCF | Jan 1989 - May 1994 |
| Roff Operating Company LLC | Wyoming | 0 BBLs | 0 MCF | Jun 2014 - Jun 2020 |
| Ronadero Company Inc | Wyoming | 0 BBLs | 0 MCF | Sep 1992 - Dec 1996 |
| Rosa Petroleum | Wyoming | 0 BBLs | 0 MCF | Oct 1987 - Dec 1995 |
| Rosetta Resource Operating LP | Wyoming | 0 BBLs | 0 MCF | Feb 2009 - Dec 2010 |
| Royal Oil LLC | Wyoming | 0 BBLs | 0 MCF | Jun 2003 - Dec 2015 |
| Royal Resources Exploration | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Mar 1984 |
| Ruby Drilling Co/Wycan Inc | Wyoming | 0 BBLs | 0 MCF | Feb 1990 - Aug 1998 |
| Ruby Drilling Company Inc | Wyoming | 0 BBLs | 0 MCF | Oct 1983 - Oct 2007 |
| Runge Oil Company | Wyoming | 0 BBLs | 0 MCF | Oct 1985 - Jul 1986 |
| Russell George | Wyoming | 0 BBLs | 0 MCF | Sep 1990 - Aug 2010 |
| S & J Operating Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Sep 1986 |
| S & S Energy Inc | Wyoming | 0 BBLs | 0 MCF | Aug 1987 - Mar 1991 |
| Saba Energy Of Texas Inc | Wyoming | 0 BBLs | 0 MCF | Oct 1980 - May 2002 |
| Sabine Corporation | Wyoming | 0 BBLs | 0 MCF | Jul 1985 - Mar 1986 |
| Sabine Oil & Gas Corporation | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Mar 2015 |
| Sabine Production Company | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Jun 1985 |
| Sabre Energy Inc | Wyoming | 0 BBLs | 0 MCF | Aug 2008 - Oct 2011 |
| Saga Petroleum LLC Of Colorado | Wyoming | 0 BBLs | 0 MCF | Jul 2000 - Sep 2018 |
| Sage Butte PRB Operating, LLC | Wyoming | 133,009 BBLs | 416,067 MCF | Mar 2018 - Feb 2026 |
| Sage Petroleum LLC | Wyoming | 0 BBLs | 0 MCF | Mar 2000 - Jun 2008 |
| Salt Creek Operating LLC | Wyoming | 0 BBLs | 0 MCF | May 2013 - Mar 2020 |
| Salt Creek West Partners | Wyoming | 0 BBLs | 0 MCF | Jan 1980 - Jul 1995 |
| Samedan Oil Corporation | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 2002 |
| Samson Exploration LLC | Wyoming | 107,903 BBLs | 176,973 MCF | Mar 2015 - Feb 2026 |
| Samson Oil & Gas USA Inc | Wyoming | 0 BBLs | 0 MCF | Apr 2007 - Feb 2026 |
| Samson Resources Company LLC | Wyoming | 0 BBLs | 0 MCF | Aug 1982 - Feb 2021 |
| San Marco Petroleum Inc | Wyoming | 0 BBLs | 0 MCF | Feb 1994 - Apr 2011 |
| Sanchez-O'Brien | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Dec 1984 |
| Sands Oil Company Inc | Wyoming | 0 BBLs | 0 MCF | Aug 2000 - Dec 2016 |
| Sands-American Corp | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Jan 1990 |
| Santa Rosa Petroleum LLC | Wyoming | 0 BBLs | 60 MCF | Jun 2016 - Feb 2026 |
| Santee Inc | Wyoming | 0 BBLs | 0 MCF | Jan 1996 - Dec 1996 |
| Sauer Bill Oil & Gas Company LLC | Wyoming | 0 BBLs | 0 MCF | Jan 1978 - Jun 1999 |
| Saurus Resources Inc | Wyoming | 0 BBLs | 0 MCF | Jun 2000 - May 2002 |