| Wolf Unit #1 G-3-180662 | Lindenmuth & Associates, Inc. only | Lucky, West (Gola) | Matagorda | 1 | 37.8K | 2.47M | Dec 2000 – Nov 2001 |
| Lawrence Gas Unit G-2-167301 | Indexgeo & Associates, Inc. only | Hallettsville, South (Wx. 6900) | Lavaca | 1 | 5.36K | 348K | Jan 1998 – Oct 1999 |
| Powell G-9-157094 | RBJ & Associates, LP only | Pegasus (Pennsylvanian) | Upton | 1 | 3.21K | 102K | Dec 1995 – Feb 2001 |
| Krejci "a" Gas Unit G-2-169350 | Indexgeo & Associates, Inc. only | Hallettsville, S. (Yegua 3650) | Lavaca | 1 | 1.81K | 230K | Mar 1998 – Jun 2001 |
| Konvicka G-2-155157 | Indexgeo & Associates, Inc. only | Hallettsville, S. (Yegua 3650) | Lavaca | 1 | 1.39K | 112K | Jun 1995 – Oct 1995 |
| Pena - Rodriguez Gas Unit G-4-126540 | Gasper Rice & Associates, Inc. only | Ortiz (Lobo) | Webb | 1 | 1.28K | 309K | Jan 1993 – Mar 1998 |
| Rucks, A. R. Fee G-3-90724 | Lindenmuth & Associates, Inc. only | Danbury, SW. (13,300) | Brazoria | 1 | 1.2K | 159K | Jan 1993 – Aug 1995 |
| Griffith & Associates G-2-184577 | C & E Operating, Inc. only | Papalote (4500) | Bee | 1 | 861 | 18.7K | Jun 2001 – Apr 2002 |
| Wooton-Sanderson Gas Unit G-3-160734 | Indexgeo & Associates, Inc. only | Alleyton (Yegua) | Colorado | 1 | 838 | 2.37M | Sep 1996 – Mar 2001 |
| Sullivan G-5-134309 | Machin & Associates, Inc. only | Eileen Sullivan (Glen Rose) | Leon | 1 | 714 | 933 | Jan 1993 – Jun 1993 |
| New-Henderson Gas Unit G-2-170746 | Indexgeo & Associates, Inc. only | Hallettsville, S. (Yegua 3650) | Lavaca | 1 | 529 | 25.4K | Jul 1998 – Feb 1999 |
| Wolf Unit #1 G-3-195173 | Lindenmuth & Associates, Inc. only | Lucky, West ( F-12) | Matagorda | 1 | 435 | 69.5K | May 2003 – Mar 2004 |
| McMichael G-6-235349 | Machin & Associates, Inc. only | Danville (TP-CV Cons.) | Gregg | 1 | 343 | 16.7K | Jan 2008 – Sep 2011 |
| Double M Ranch Co. G-8-112087 | Bloomer & Associates, Inc. only | Double M (Odom Limestone) | Nolan | 1 | 280 | 7.39K | Jan 1993 – Jan 1994 |
| Craig G-6-119926 | Machin & Associates, Inc. only | Penn-Griffith (Travis Peak, Up.) | Rusk | 1 | 116 | 19.5K | Jan 1993 – Aug 1995 |
| Scottish Rite "127" G-9-220295 | BCM & Associates, Inc. only | Q Man (Canyon Sand) | Reagan | 1 | 17 | 192 | Apr 2006 – Aug 2012 |
| Bosch, J. M. G-6-91225 | Machin & Associates, Inc. only | Lansing, North (Travis Peak) | Harrison | 1 | 6 | 658 | Jan 1993 – Feb 1993 |
| Crain-Lowery G-2-142831 | Westhall Associates, Inc. only | Telferner, North (2500) | Victoria | 1 | 2 | 14.6K | Jan 1993 – Aug 1993 |
| Obenhaus G-3-174342 | Indexgeo & Associates, Inc. only | Alleyton (Yegua) | Colorado | 1 | 0 | 49K | Jul 1999 – Apr 2000 |
| Obenhaus Gas Unit G-3-174384 | Indexgeo & Associates, Inc. only | Alleyton (Yegua) | Colorado | 1 | 0 | 422K | Jul 1999 – Aug 2001 |
| Isgrig G-3-175627 | Indexgeo & Associates, Inc. only | Columbus (Consolidated) | Colorado | 1 | 0 | 583K | Nov 1999 – Nov 2003 |
| Obenhaus, Richard R. Gas Unit G-3-175703 | Indexgeo & Associates, Inc. only | Alleyton (Yegua) | Colorado | 1 | 0 | 82.4K | Oct 1999 – Feb 2000 |
| Ilse-Miller Gas Unit G-3-187133 | Indexgeo & Associates, Inc. only | New Taiton (Frio 4030) | Wharton | 1 | 0 | 158K | Dec 2001 – Feb 2003 |
| Teel G-3-203951 | Indexgeo & Associates, Inc. only | Teel (3750) | Jasper | 1 | 0 | 244K | May 2004 – Sep 2006 |
| Teel G-3-204725 | Indexgeo & Associates, Inc. only | Teel (3750) | Jasper | 1 | 0 | 22.7K | Sep 2004 – May 2005 |
| Baker G-3-231727 | Indexgeo & Associates, Inc. only | Copeland Creek (2308) | Polk | 1 | 0 | 59.8K | Sep 2007 – Nov 2008 |
| Hayes, Martin G-6-54208 | Machin & Associates, Inc. only | Willow Springs (Bodenheim-Trans) | Gregg | 1 | 0 | 0 | — |
| Wayman, E. G-6-124955 | Machin & Associates, Inc. only | Gooch-Gant (Rodessa) | Harrison | 1 | 0 | 0 | — |
| Roberson G-6-222470 | Machin & Associates, Inc. only | Boggy Creek* | Anderson | 1 | 0 | 6.86K | Feb 2007 – Nov 2007 |
| Jordan G-6-250093 | Machin & Associates, Inc. only | Pleasant Grove, E. (Woodbine) | Rusk | 1 | 0 | 14.5K | May 2009 – Nov 2011 |
| Hebert G-6-267382 | Henley & Associates, LLC only | Wildcat | Cass | 1 | 0 | 0 | — |
| Associates G-8-66001 | Ryder Scott Oil Company only | Stephens County Regular (Gas) | Stephens | 1 | 0 | 0 | — |
| Associates G-8-69721 | McClymond, Ltd. only | Stephens County Regular (Gas) | Stephens | 1 | 0 | 33.9K | Jan 1993 – Jan 2007 |
| Allison G-9-133844 | Mulloy, J. W. Associates, Inc. only | Branch, North (Adams Branch) | Sutton | 1 | 0 | 2.83K | Jan 1993 – Oct 1993 |
| BC Associates G-13-259233 | TEP Barnett USA, LLC only | Newark, East (Barnett Shale) | Tarrant | 1 | 0 | 3.6M | May 2011 – Apr 2026 |
| BC Associates G-13-259408 | TEP Barnett USA, LLC only | Newark, East (Barnett Shale) | Tarrant | 1 | 0 | 2.88M | Sep 2011 – Apr 2026 |
| Howard G-1-74308 | Wayne E. Glenn Associates, Inc. only | Big Foot, West (Gas) | Frio | 1 | 0 | 137K | Jul 1993 – Dec 2015 |
| BC Associates G-13-259926 | TEP Barnett USA, LLC only | Newark, East (Barnett Shale) | Tarrant | 1 | 0 | 2.04M | Nov 2011 – Apr 2026 |
| Gracey G-1-78318 | Wayne E. Glenn Associates, Inc. only | Big Foot, West (Gas) | Frio | 1 | 0 | 165K | Jul 1993 – Dec 2015 |
| Vance, John T. G-2-38624 | Harper-Smith & Associates, Inc. only | Texana, N. (Frio 6240) | Jackson | 1 | 0 | 0 | — |
| Lang, Paul G-2-54614 | Lindenmuth & Associates, Inc. only | Holly, East (Massive 2) | De Witt | 1 | 0 | 0 | — |
| Weathersby G-2-107086 | Dennis, L.W. & Associates, Inc. only | Mount Lucas, N.W. (Hockley-A-) | Live Oak | 1 | 0 | 0 | — |
| McCan G-2-140671 | Westhall Associates, Inc. only | Salem (3180) | Victoria | 1 | 0 | 3.1K | Jan 1993 – Mar 1993 |
| Whitlow G-2-147026 | Westhall Associates, Inc. only | Wildcat | Bee | 1 | 0 | 0 | — |
| Albrecht G-2-147029 | Westhall Associates, Inc. only | Wildcat | Victoria | 1 | 0 | 0 | — |
| Stange G-2-147668 | Westhall Associates, Inc. only | Maetze (1300 Miocene) | Goliad | 1 | 0 | 54.7K | Oct 1993 – Feb 1995 |
| Pilgreen Gas Unit G-2-148416 | Indexgeo & Associates, Inc. only | Speaks, SW. (3410) | Lavaca | 1 | 0 | 151K | Dec 1993 – Jan 1996 |
| Zmeskal G-2-150744 | Indexgeo & Associates, Inc. only | Felix D. L. (Frio 3300) | Victoria | 1 | 0 | 255K | Jun 1994 – Apr 1999 |
| Leeper G-2-155495 | Indexgeo & Associates, Inc. only | Schroeder (Frio 3200) | Victoria | 1 | 0 | 113K | Jun 1995 – May 1997 |
| Zmeskal G-2-156836 | Indexgeo & Associates, Inc. only | Stapp (Frio 3600) | Victoria | 1 | 0 | 144K | Nov 1995 – Sep 1998 |