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| Operator | Operating State | Recent Oil Production | Recent Gas Production | Production Dates on File |
|---|---|---|---|---|
| Eden Energy Colorado LLC Adba Eden Energy Corp | Colorado | 0 BBLs | 0 MCF | Sep 2007 - Jan 2009 |
| Edge Energy II LLC | Colorado | 971 BBLs | 2,469 MCF | Sep 2017 - Feb 2024 |
| Edge Energy LLC | Colorado | 79,845 BBLs | 424,051 MCF | Dec 2015 - Feb 2024 |
| Edwards Energy Corporation | Colorado | 0 BBLs | 0 MCF | Dec 2006 - Dec 2011 |
| Ee3 LLC | Colorado | 0 BBLs | 0 MCF | Nov 2012 - Nov 2015 |
| El Paso E & P Company LP | Colorado | 0 BBLs | 0 MCF | Jan 2006 - May 2012 |
| El Paso Energy Raton LLC | Colorado | 0 BBLs | 0 MCF | Sep 2000 - Sep 2008 |
| Elk Exploration Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2001 |
| Ellora LLC | Colorado | 0 BBLs | 0 MCF | Nov 2004 - Feb 2010 |
| Elm Ridge Exploration Company LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Apr 2017 |
| Encana Energy Resources Inc | Colorado | 0 BBLs | 0 MCF | Dec 2001 - Dec 2004 |
| Encana Oil & Gas (USA) Inc | Colorado | 0 BBLs | 0 MCF | Jul 1999 - Jul 2017 |
| Endeavor Energy Resources LP | Colorado | 0 BBLs | 0 MCF | Mar 2016 - Oct 2017 |
| Endeavour Operating Corporation | Colorado | 0 BBLs | 0 MCF | Jun 2013 - Sep 2015 |
| Enduring Resources LLC | Colorado | 0 BBLs | 0 MCF | Nov 2017 - Jan 2024 |
| Energen Resources Corporation | Colorado | 0 BBLs | 0 MCF | Mar 2003 - Mar 2015 |
| Energy Alliance Company Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2018 |
| Energy Investment Partners LLC | Colorado | 0 BBLs | 0 MCF | Jun 2006 - Jan 2019 |
| Energy Investments Inc | Colorado | 646 BBLs | 857 MCF | May 2013 - Feb 2024 |
| Energy Oil And Gas Inc | Colorado | 0 BBLs | 0 MCF | Sep 2002 - Dec 2010 |
| Energy Operations Colorado LP | Colorado | 0 BBLs | 0 MCF | Jun 2005 - Nov 2009 |
| Energy Operatng Company Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2000 |
| Energy Quest II LLC | Colorado | 0 BBLs | 0 MCF | Jan 2014 - May 2019 |
| Energy Search Company | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jun 2021 |
| Enerplus Resources (USA) Corporation | Colorado | 27,083 BBLs | 44,941 MCF | Dec 2009 - Feb 2024 |
| Enervest Management Co LLC | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jun 2000 |
| Enervest Operating LLC | Colorado | 0 BBLs | 0 MCF | Feb 2005 - Jul 2019 |
| Enervest San Juan Operating | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2001 |
| Enprop Inc | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Feb 2013 |
| Entek GRB LLC | Colorado | 0 BBLs | 0 MCF | May 2010 - Oct 2021 |
| EOG Resources Inc | Colorado | 0 BBLs | 0 MCF | Apr 2002 - Mar 2024 |
| EP Energy E&P Company LP | Colorado | 0 BBLs | 0 MCF | Jun 2012 - Jul 2013 |
| EP Energy Management LLC | Colorado | 0 BBLs | 0 MCF | Dec 2000 - Jun 2006 |
| Ephphatha LLC | Colorado | 0 BBLs | 0 MCF | Dec 2004 - Feb 2024 |
| Epic Energy LLC | Colorado | 0 BBLs | 0 MCF | Nov 2018 - Dec 2023 |
| Equity Oil Co | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Aug 2004 |
| Erg Resources LLC | Colorado | 0 BBLs | 0 MCF | Mar 2006 - Feb 2007 |
| Evergreen Natural Resources LLC | Colorado | 0 BBLs | 2,182,818 MCF | Dec 2018 - Feb 2024 |
| Evergreen Operating Corporation | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Sep 2006 |
| Evertson Operating Inc | Colorado | 0 BBLs | 0 MCF | Oct 2002 - Nov 2004 |
| Excell Operating LLC | Colorado | 0 BBLs | 0 MCF | Oct 2015 - Aug 2018 |
| Exco Resources Inc | Colorado | 0 BBLs | 0 MCF | Oct 2000 - Oct 2007 |
| Extraction Oil & Gas LLC | Colorado | 702,748 BBLs | 6,801,705 MCF | Jul 2013 - Feb 2024 |
| Exxon Mobil Corporation | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2011 |
| Exxon Mobil Oil Corporation | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2011 |
| Fahey Oil & Gas | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jul 2021 |
| Fancher Oil LLC | Colorado | 0 BBLs | 0 MCF | Jan 2001 - Jun 2006 |
| Faulconer Inc* Vernon E | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Dec 2018 |
| Fees Jr And Son Oil & Gas* Walter S | Colorado | 0 BBLs | 0 MCF | Jan 1999 - Jan 2024 |
| Fidelity Exploration & Production Company | Colorado | 0 BBLs | 0 MCF | Oct 1999 - Jan 2012 |