| See-Yegua Unit G-3-142842 | Enervest Operating, L.L.C. | Clay, NE (Austin Chalk 11350) | Burleson | 1 | 101K | 2.22M | by Jan 1993 – Sep 2007 |
| McCoy O-3-12627 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Lee | 2 | 99.7K | 930K | by Jan 1993 – Jul 2007 |
| Brown Oil Unit #2 O-3-21746 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Fayette | 1 | 97.5K | 868K | by Jan 1993 – Mar 2008 |
| Sprankle O-3-22164 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Washington | 1 | 96.6K | 1.39M | Aug 1993 – Jun 2003 |
| Yegua-Schawe Unit G-3-147595 | Enervest Operating, L.L.C. | Clay, NE (Austin Chalk 11350) | Burleson | 1 | 95.1K | 2.3M | Nov 1993 – Oct 2013 |
| Pecan Creek-Guenther O-3-22714 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Fayette | 1 | 90.4K | 964K | Feb 1995 – Aug 2012 |
| Bing Unit O-3-17369 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Fayette | 2 | 85.9K | 180K | by Jan 1993 – Aug 2006 |
| Bscu USA 27328 O-6-13586 | Enervest Operating, L.L.C. | Brookeland (Austin Chalk, 8800) | Sabine | 1 | 85.6K | 365K | Apr 1996 – Aug 2004 |
| Olden-Olden Unit O-3-21711 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Brazos | 1 | 84K | 1.31M | by Jan 1993 – Jan 2013 |
| Butler G-3-152845 | Enervest Operating, L.L.C. | Giddings (Austin Chalk, Gas) | Washington | 1 | 81.5K | 2.46M | Nov 1994 – Feb 2015 |
| Brazos Coal Ltd.-Raceway Ut. O-3-21668 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Brazos | 1 | 81.2K | 679K | by Jan 1993 – Jan 2013 |
| Goldapp-Withers O-3-22465 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Fayette | 1 | 79.1K | 246K | Jun 1994 – Feb 2005 |
| Keng Unit O-3-22370 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Lee | 1 | 76.3K | 84.3K | Apr 1994 – May 2009 |
| Koenning-Caldwell Unit O-3-21902 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Fayette | 1 | 74.1K | 222K | by Jan 1993 – May 2013 |
| Hoefer-Smith Uint O-3-21512 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Fayette | 1 | 73.5K | 282K | by Jan 1993 – Jan 2012 |
| Washington Unit O-3-22508 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Fayette | 1 | 72.2K | 564K | Jul 1994 – Jul 2007 |
| Jones-Foster Unit O-3-22302 | Enervest Operating, L.L.C. | Kurten (Buda) | Brazos | 1 | 66K | 173K | Dec 1993 – Aug 2010 |
| Humphreys 59 O-14-7339 | Enervest Operating, L.L.C. | Sparks (Tonkawa) | Hemphill | 3 | 65.8K | 454K | Jan 2000 – Dec 2012 |
| Britt G-14-270579 | Enervest Operating, L.L.C. | Mills Ranch (Granite Wash Cons.) | Wheeler | 1 | 64.7K | 121K | May 2013 – May 2014 |
| Reed 2 O-14-8557 | Enervest Operating, L.L.C. | Frye Ranch (Consolidated) | Wheeler | 1 | 63.8K | 684K | Aug 2011 – Apr 2014 |
| Reveille Unit O-3-22979 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Brazos | 1 | 61.5K | 451K | Feb 1996 – Dec 2015 |
| Brown O-3-22243 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Fayette | 1 | 60.4K | 83.1K | Oct 1993 – Aug 2005 |
| Dallmeyer Unit G-3-163806 | Enervest Operating, L.L.C. | Giddings (Austin Chalk, Gas) | Washington | 1 | 60.1K | 1.32M | May 1997 – Jul 2013 |
| Freeman-Creagor Unit O-3-22324 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Brazos | 1 | 58.3K | 944K | Feb 1994 – Dec 2012 |
| Martindale-McGraw Unit A-33 G-6-167871 | Enervest Operating, L.L.C. | Brookeland (Austin Chalk, 8800) | Jasper | 1 | 56.4K | 1.01M | Sep 1997 – May 2011 |
| Dunlap-Keyser Unit G-3-148011 | Enervest Operating, L.L.C. | Giddings (Austin Chalk, Gas) | Brazos | 1 | 54K | 1.77M | Nov 1993 – May 1998 |
| Tison-Geudry Unit G-3-146847 | Enervest Operating, L.L.C. | Giddings (Austin Chalk, Gas) | Brazos | 1 | 53.7K | 899K | Sep 1993 – Oct 2007 |
| Wheeler "B" O-3-21587 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Brazos | 1 | 52.4K | 476K | by Jan 1993 – Aug 2003 |
| Weedon-Weedon Unit O-3-21123 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Brazos | 2 | 51.4K | 457K | by Jan 1993 – Mar 2002 |
| Moczygemba, C. J. O-2-2955 | Enervest Operating, L.L.C. | Panna Maria (Edwards) | Karnes | 1 | 49.7K | 249K | May 1993 – Apr 2016 |
| Harbers Unit O-3-22541 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Fayette | 1 | 47.5K | 372K | Jul 1994 – Oct 2014 |
| Triolo Unit O-3-20291 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Fayette | 2 | 47.4K | 242K | Sep 1993 – Apr 2006 |
| Graham-Graham a Unit O-3-21742 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Fayette | 1 | 47K | 360K | by Jan 1993 – Jan 2003 |
| Brennand O-11-4483 | Enervest Operating, L.L.C. | Mungerville (Pennsylvanian) | Dawson | 4 | 46.6K | 21 | by Jan 1993 – Oct 2009 |
| Falkenberg BH Unit G-3-153583 | Enervest Operating, L.L.C. | Giddings (Austin Chalk, Gas) | Lee | 1 | 45.2K | 2.09M | Oct 1994 – Dec 2013 |
| 247 Land Co O-3-24755 | Enervest Operating, L.L.C. | Ft. Trinidad, SW. (Buda) | Madison | 1 | 44.9K | 34.1K | Feb 2005 – Apr 2009 |
| Golden Triangle Unit O-3-21666 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Brazos | 1 | 44.8K | 160K | by Jan 1993 – Jul 2001 |
| Blackstone Minerals Unit A-956 G-6-160926 | Enervest Operating, L.L.C. | Brookeland (Austin Chalk, 8800) | Newton | 1 | 43K | 847K | Aug 1996 – Jul 2007 |
| DJ Rater a Unit O-13-31884 | Enervest Operating, L.L.C. | Newark, East (Barnett Shale) | Montague | 1 | 42K | 92.3K | Sep 2010 – Dec 2010 |
| Yegua-Porter Unit G-3-150305 | Enervest Operating, L.L.C. | Giddings (Austin Chalk, Gas) | Burleson | 1 | 41.3K | 946K | Feb 1994 – Mar 2005 |
| Mertink Unit O-3-14895 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Lee | 2 | 40.8K | 34.7K | by Jan 1993 – Jun 1997 |
| Puryear G-14-124240 | Enervest Operating, L.L.C. | Britt Ranch W. (Granite Wash a ) | Wheeler | 1 | 40.2K | 1.08M | by Jan 1993 – Jun 2013 |
| Raceway O-3-23445 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Brazos | 1 | 37.1K | 280K | Nov 1997 – Mar 2012 |
| Butler G-3-153696 | Enervest Operating, L.L.C. | Giddings (Austin Chalk, Gas) | Washington | 1 | 37K | 2.79M | Jan 1995 – Dec 2014 |
| Wagnon Unit O-3-23804 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Grimes | 1 | 36.1K | 360K | Sep 1999 – Nov 2012 |
| Kotara-Janysek G-2-157823 | Enervest Operating, L.L.C. | Person (Edwards) | Karnes | 1 | 35.3K | 606K | Feb 1996 – May 2018 |
| Janysek, Joe J. O-2-11194 | Enervest Operating, L.L.C. | Labus (Austin) | Karnes | 1 | 35K | 38.9K | Apr 2014 – Oct 2017 |
| Dominik-Holligan Unit O-3-21543 | Enervest Operating, L.L.C. | Giddings (Austin Chalk-3) | Brazos | 1 | 34.9K | 55.4K | by Jan 1993 – Sep 2006 |
| Chadbourne Ranch 431 O-9-12804 | Enervest Operating, L.L.C. | Fort Chadbourne | Coke | 1 | 33.7K | 37.6K | by Jan 1993 – Jun 2000 |
| University -DJ- R/a -A- O-10-13432 | Enervest Operating, L.L.C. | University Block 9 (Penn.) | Andrews | 6 | 33.4K | 15.3K | by Jan 1993 – Nov 1993 |