| Lange Gas Unit G-3-158255 | Cox & Perkins Exploration, Inc. | Phase Four (9370 Yegua) | Wharton | 1 | 316K | 4.51M | Feb 1996 – Jun 1998 |
| Vrana G-3-191567 | Cox & Perkins Exploration, Inc. | Black Owl (Yegua 9200) | Wharton | 1 | 173K | 2.22M | Oct 2002 – Jan 2010 |
| Leona Unit No. 2 O-3-23234 | Cox & Perkins Exploration, Inc. | Gracey Ranch (Yegua 6850) | Colorado | 1 | 152K | 1.11M | Dec 1996 – Apr 2001 |
| Lange-Boatright Gas Unit G-3-158253 | Cox & Perkins Exploration, Inc. | Phase Four (9050 Yegua) | Wharton | 1 | 115K | 4.92M | Feb 1996 – Dec 2006 |
| Mollnar No. 1 Gas Unit G-3-153815 | Cox & Perkins Exploration, Inc. | Phase Four (9220 Yegua) | Wharton | 1 | 110K | 4.84M | Mar 1995 – Jun 2004 |
| Runnells G-3-155365 | Cox & Perkins Exploration, Inc. | Phase Four (9220 Yegua) | Wharton | 1 | 91.9K | 3.48M | Jul 1995 – Mar 2000 |
| Duson G-3-187575 | Cox & Perkins Exploration, Inc. | Shanghai, East (10500) | Wharton | 1 | 79.7K | 922K | Jan 2002 – Apr 2008 |
| M Plus Land O-3-23270 | Cox & Perkins Exploration, Inc. | Gracey Ranch (Yegua 6850) | Colorado | 2 | 78.6K | 167K | May 1997 – Dec 1998 |
| Gold Zapp-Mollnar Unit G-3-155698 | Cox & Perkins Exploration, Inc. | Phase Four (8360 Yegua) | Wharton | 1 | 62.9K | 2.1M | Sep 1995 – Aug 2001 |
| Ratcliffe-Hyvl Unit O-3-21062 | Cox & Perkins Exploration, Inc. | Caldwell (Austin Chalk) | Burleson | 1 | 60.9K | 814K | Jan 1993 – Feb 2007 |
| Lutringer Gas Unit G-3-158695 | Cox & Perkins Exploration, Inc. | Phase Four (8300 Yegua) | Wharton | 1 | 51K | 3.69M | Mar 1996 – Aug 2001 |
| Germer-Sample G-2-153712 | Cox & Perkins Exploration, Inc. | Bright Falcon (Yegua 9580) | Jackson | 1 | 46.3K | 352K | Jan 1995 – Jul 1997 |
| Stafford-Menefee G-2-198957 | Cox & Perkins Exploration, Inc. | Lost Bridge (Yegua 9400) | Jackson | 1 | 45.8K | 767K | Sep 2003 – Jun 2011 |
| Leona G-3-160842 | Cox & Perkins Exploration, Inc. | Gracey Ranch (Yegua 6850) | Colorado | 1 | 42.3K | 3.47M | Jul 1996 – Apr 2001 |
| Mitchell G-3-162706 | Cox & Perkins Exploration, Inc. | Phase Four (8800 Yegua) | Wharton | 1 | 41.2K | 1.17M | Feb 1997 – Apr 2002 |
| M Plus Land G-3-160816 | Cox & Perkins Exploration, Inc. | Gracey Ranch (Yegua 6850) | Colorado | 1 | 40.1K | 3.59M | Sep 1996 – May 2001 |
| Catherine G-2-149024 | Cox & Perkins Exploration, Inc. | Lost Bridge (Yegua 10,700) | Jackson | 1 | 36.5K | 998K | Mar 1994 – Jun 1999 |
| Hillman G-2-120172 | Cox & Perkins Exploration, Inc. | Bright Falcon (Yegua 9600) | Jackson | 1 | 35.9K | 7.55M | Jan 1993 – Oct 2004 |
| Kilian 2 Unit O-3-17351 | Cox & Perkins Exploration, Inc. | Giddings (Austin Chalk-3) | Fayette | 1 | 32.4K | 23.3K | Jan 1993 – Nov 1997 |
| Hillman G-2-176507 | Cox & Perkins Exploration, Inc. | Bright Falcon (Yegua 9600) | Jackson | 1 | 32.2K | 11.2M | Mar 2000 – Jan 2012 |
| Porche No. 1 Gas Unit G-2-151501 | Cox & Perkins Exploration, Inc. | Bright Falcon (Yegua 10,400) | Jackson | 1 | 31.8K | 928K | Aug 1994 – Dec 2001 |
| Bartos G-3-127228 | Cox & Perkins Exploration, Inc. | Phase Four (8900 Yegua) | Wharton | 1 | 29.8K | 728K | Jan 1993 – Feb 1998 |
| Sue G-3-161467 | Cox & Perkins Exploration, Inc. | Gracey Ranch (Wilcox 9700) | Colorado | 1 | 27.6K | 2.93M | Sep 1996 – Jun 2000 |
| Sonat Minerals O-3-23345 | Cox & Perkins Exploration, Inc. | Orangefield (Hackberry 8000) | Orange | 1 | 27.1K | 19.2K | Sep 1997 – Sep 1999 |
| Wegenhoft G-3-161598 | Cox & Perkins Exploration, Inc. | Gracey Ranch (Yegua 6850) | Colorado | 1 | 26.5K | 2.72M | Jan 1997 – May 2001 |
| Gold-Zapp G-3-124516 | Cox & Perkins Exploration, Inc. | Phase Four (10500 Yegua) | Wharton | 1 | 25.4K | 958K | Jan 1993 – Jul 1998 |
| L. Peters Unit O-3-13580 | Cox & Perkins Exploration, Inc. | Giddings (Buda) | Fayette | 1 | 25K | 127K | Jan 1993 – Nov 1999 |
| Clara G-3-162033 | Cox & Perkins Exploration, Inc. | Gracey Ranch (Wilcox 9700) | Colorado | 1 | 23K | 2.56M | Jan 1997 – Dec 2000 |
| Germer-Sample O-2-8317 | Cox & Perkins Exploration, Inc. | Bright Falcon (Yegua 9580) | Jackson | 1 | 21.5K | 163K | Jul 1997 – Jan 2003 |
| Pierce-Mollnar G-3-181911 | Cox & Perkins Exploration, Inc. | Phase Four (9800 Yegua) | Wharton | 1 | 19.9K | 1.02M | Dec 2000 – Jul 2006 |
| Gold-Zapp G-3-128427 | Cox & Perkins Exploration, Inc. | Phase Four (8900 Yegua) | Wharton | 1 | 19.7K | 644K | Aug 1995 – Mar 2000 |
| Webb O-4-11490 | Cox & Perkins Exploration, Inc. | Webb (5500) | San Patricio | 1 | 19.3K | 19.6K | Jan 1993 – Sep 1995 |
| Crook Unit O-3-20862 | Cox & Perkins Exploration, Inc. | Caldwell (Austin Chalk) | Burleson | 2 | 19K | 345K | Jan 1993 – Oct 2003 |
| Mazoch Gas Unit G-3-157455 | Cox & Perkins Exploration, Inc. | Black Owl (Yegua 7560) | Wharton | 1 | 18.6K | 1.28M | Jan 1996 – Mar 1999 |
| M Plus Land G-3-163298 | Cox & Perkins Exploration, Inc. | Gracey Ranch (Wilcox 9600) | Colorado | 1 | 18.4K | 68.4K | May 1997 – Nov 1998 |
| Reinhardt -M- O-3-14394 | Cox & Perkins Exploration, Inc. | Giddings (Austin Chalk-3) | Fayette | 1 | 18K | 14.3K | Jan 1993 – Sep 1997 |
| Sonat Minerals G-3-164070 | Cox & Perkins Exploration, Inc. | Orangefield (Hackberry 8000) | Orange | 1 | 17.6K | 251K | Dec 1996 – Sep 1997 |
| Schrader-Stonehenge Unit O-3-21061 | Cox & Perkins Exploration, Inc. | Caldwell (Austin Chalk) | Burleson | 1 | 17.6K | 285K | Jan 1993 – Nov 2002 |
| Wegenhoft O-3-24361 | Cox & Perkins Exploration, Inc. | Garwood East (Yegua 6650) | Colorado | 1 | 16.6K | 94.5K | May 2003 – Aug 2005 |
| Gadeke Gas Unit G-3-158645 | Cox & Perkins Exploration, Inc. | Black Owl (Yegua 8260) | Wharton | 1 | 16.5K | 552K | Apr 1996 – Jul 1997 |
| Leona Unit No. 2 G-3-163020 | Cox & Perkins Exploration, Inc. | Gracey Ranch (Wilcox 9600) | Colorado | 1 | 16.2K | 1.75M | Dec 1996 – Apr 2003 |
| Keyser-Kroll G-3-166130 | Cox & Perkins Exploration, Inc. | Ulrich (11370) | Harris | 1 | 16.1K | 792K | Nov 1997 – May 1999 |
| Germer-Sample O-2-7997 | Cox & Perkins Exploration, Inc. | Bright Falcon (Yegua 10,800) | Jackson | 1 | 15.3K | 22.5K | Jul 1994 – Jan 1995 |
| Yockey G-3-125947 | Cox & Perkins Exploration, Inc. | Phase Four (10500 Yegua) | Wharton | 1 | 15.2K | 359K | Jan 1993 – May 1999 |
| Hanover, Joe O-3-12974 | Cox & Perkins Exploration, Inc. | Caldwell (Austin Chalk) | Burleson | 1 | 14.7K | 225K | Jan 1993 – Dec 2010 |
| Della G-3-163324 | Cox & Perkins Exploration, Inc. | Phase Four (9560 Yegua) | Wharton | 1 | 14.7K | 531K | Mar 1997 – Nov 2001 |
| Pierce Estate G-3-129900 | Cox & Perkins Exploration, Inc. | El Campo, NE (Yegua) | Wharton | 1 | 13.7K | 250K | Jan 1993 – Oct 1996 |
| Kainer G-3-183692 | Cox & Perkins Exploration, Inc. | Shanghai, East (10500) | Wharton | 1 | 11.8K | 1.5M | Jul 2001 – Sep 2003 |
| Lange Gas Unit G-3-160439 | Cox & Perkins Exploration, Inc. | Phase Four (9370 Yegua) | Wharton | 1 | 11.6K | 146K | Aug 1996 – Jan 1997 |
| Mollnar No. 1 Gas Unit G-3-163302 | Cox & Perkins Exploration, Inc. | Phase Four (9220 Yegua) | Wharton | 1 | 11.1K | 630K | Apr 1997 – Nov 1998 |