| Rathmell, J. G. G-4-196958 | M & F (Wilcox 6500) | Zapata | 1 | 0 | 144 | Nov 2002 – Dec 2005 |
| State-Cuatro-Delozeis Unit G-4-189377 | Los Mogotes (7400) | Zapata | 1 | 0 | 0 | May 2002 – Dec 2005 |
| Hereford "T" G-4-161418 | Bashara-Hereford (7300) | Webb | 1 | 0 | 93.6K | Oct 1996 – Nov 2005 |
| Hereford -T- G-4-151017 | Hereford (Lobo) | Webb | 1 | 0 | 2.79M | Jul 1994 – Nov 2005 |
| Hereford -T- G-4-88229 | Bashara-Hereford | Webb | 1 | 0 | 123K | Jan 1993 – Nov 2005 |
| Zachry, H. B. G-4-170162 | Rio Bravo (L-6) | Webb | 1 | 0 | 166K | May 1998 – Apr 2004 |
| Belcher, W. T. -B- G-3-125185 | Manvel (F.B. I, Oligocene) | Brazoria | 1 | 0 | 0 | Jan 1993 – Mar 2004 |
| Belcher, W. T. "B" G-3-154388 | Manvel (Basal Miocene) | Brazoria | 1 | 0 | 0 | Dec 1994 – Mar 2004 |
| Belcher, W. T. -B- O-3-10660 | Manvel (F. B. 1, Oligocene E) | — | 2 | 16.8K | 24.2K | Jan 1993 – Dec 2003 |
| H. B. Zachry Unit G-4-181550 | Bashara-Hereford (7300) | Webb | 1 | 0 | 7.58K | Feb 2001 – Dec 2003 |
| H. B. Zachry Unit G-4-152731 | Zachry (Lobo 6200) | Webb | 1 | 0 | 1.08M | Jul 1994 – Dec 2003 |
| Davis, E. F. Trust G-3-170771 | Manvel (Miocene 2900) | Brazoria | 1 | 0 | 1.12M | Sep 1998 – Nov 2003 |
| Haynes, Leonard Estate G-4-122997 | Charco (9200) | Zapata | 1 | 0 | 91K | Jan 1993 – Nov 2003 |
| Welhausen, J.R. G-4-89238 | Vaquillas Ranch (Lobo Cons.) | Webb | 1 | 0 | 101K | Jan 1993 – Oct 2003 |
| Belcher, W. T. "A" G-3-189775 | Manvel (1900) | Brazoria | 1 | 0 | 2.6K | Jul 2002 – Oct 2003 |
| Russell - Winch G-4-194735 | Belle Jeffers (7850) | Webb | 1 | 0 | 0 | May 2003 – Oct 2003 |
| Sanchez-McMurrey G-4-103181 | Hundido (Lobo) | Zapata | 1 | 0 | 0 | Jan 1993 – Oct 2003 |
| H.B. Zachry Unit G-4-155951 | Rodriguez (Lobo 6) | Webb | 1 | 0 | 528K | Jun 1995 – Oct 2003 |
| Rathmell, J. G. G-4-166979 | Hundido (Lobo) | Zapata | 1 | 0 | 238K | Feb 1998 – Sep 2003 |
| Webb County School Board G-4-154827 | Big Cowboy (Lobo) | Webb | 1 | 0 | 286K | May 1995 – Sep 2003 |
| 7-A Investment, Ltd. G-4-186039 | Charco (9200) | Zapata | 1 | 0 | 0 | Nov 2001 – Sep 2003 |
| Haynes, Leonard Estate G-4-135058 | Los Mogotes (7400) | Zapata | 1 | 0 | 59.7K | Jan 1993 – Sep 2003 |
| H. O. F. A. G-3-194233 | Manvel (4000) | Brazoria | 1 | 0 | 0 | Apr 2003 – May 2003 |
| Russell-Winch G-4-165987 | Vaquillas Ranch (Lobo Cons.) | Webb | 1 | 0 | 218K | Dec 1997 – May 2003 |
| Colby, E. H., et AL O-3-10383 | Manvel (F.B. I, Oligocene) | Brazoria | 2 | 34.8K | 8.65K | Jan 1993 – Feb 2003 |
| Belcher, W. T., -B- O-3-10053 | Manvel (FB- I, Miocene 4550) | — | 2 | 0 | 0 | Jan 1993 – Feb 2003 |
| Belcher, W.T. "A" G-3-90416 | Manvel (Basal Miocene) | Brazoria | 1 | 0 | 0 | Jan 1993 – Jun 2002 |
| McMurrey-Talbert G-4-169176 | Hundido (Lobo) | Zapata | 1 | 0 | 329K | Jun 1998 – Jun 2002 |
| McMurrey- Talbert G-4-179221 | Hundido (Lobo) | Zapata | 1 | 0 | 248K | Sep 2000 – Jun 2002 |
| McMurrey- Talbert G-4-179284 | Hundido (9300) | Zapata | 1 | 0 | 0 | Oct 2000 – Jun 2002 |
| Mann Trust et AL G-4-176271 | Roleta (Wilcox Consolidated) | Zapata | 1 | 0 | 152K | Jan 2000 – Feb 2002 |
| Davis, E. F., Tr. O-3-7850 | Manvel (Miocene) | Brazoria | 3 | 21K | 42.7K | Jan 1993 – Jan 2002 |
| Way, H. J., "A" O-3-10392 | Manvel (F.B. I, Oligocene) | — | 3 | 0 | 0 | Jan 1993 – Jan 2002 |
| Belcher, W.T. "B" G-3-108997 | Manvel (Miocene 4500) | Brazoria | 1 | 0 | 407 | Jan 1993 – Nov 2001 |
| Belcher, W. T. "A" G-3-105872 | Manvel (Miocene Upper) | Brazoria | 1 | 0 | 5.25K | Jan 1993 – Nov 2001 |
| Belcher W. T. -A- G-3-123791 | Manvel (Miocene) | — | 1 | 0 | 0 | Jan 1993 – Oct 2001 |
| State Tract 278 B O-4-12334 | Conn Brown Harbor (Frio "E" FB-B | Aransas | 1 | 59.2K | 221K | Feb 1994 – Apr 2001 |
| Way, et al Unit O-3-10937 | Manvel (4970) | — | 1 | 15.1K | 6.96K | Jan 1993 – Oct 2000 |
| Benavides, R.V. G-4-118699 | Volz (Lobo) | Webb | 1 | 0 | 271K | Jan 1993 – Sep 2000 |
| Scopel, S., NCT-1 O-3-10391 | Manvel (F.B. I, Oligocene) | — | 1 | 0 | 0 | Jan 1993 – Sep 2000 |
| Ewing, O. F. O-3-2928 | Manvel (Miocene) | Brazoria | 7 | 20.1K | 3.87K | Jan 1993 – Aug 2000 |
| Ewing, O. F. O-3-9833 | Manvel (FB-II, Oakville 1) | — | 1 | 0 | 0 | Jan 1993 – Aug 2000 |
| Decarreon, G. G. G-4-145773 | Hundido (9300) | Zapata | 1 | 0 | 508K | May 1993 – Jun 2000 |
| Sanchez-McMurrey G-4-177388 | M & F (Wilcox 6500) | Zapata | 1 | 0 | 0 | May 2000 – Jun 2000 |
| Las Piedras Gas Unit G-4-177261 | Roleta (Wilcox Consolidated) | Zapata | 1 | 0 | 0 | Apr 2000 – Jun 2000 |
| Sanchez-McMurrey G-4-161756 | Hundido (Lobo) | Zapata | 1 | 0 | 161K | Jan 1997 – May 2000 |
| Belcher, W. T., -A- O-3-7051 | Manvel (Miocene -B-, Upper) | Brazoria | 2 | 0 | 0 | Jan 1993 – May 2000 |
| Belcher, W. T., -A- O-3-9894 | Manvel (FB-II, Oakville 1) | — | 1 | 0 | 0 | Jan 1993 – May 2000 |
| Decarreon, G.G. G-4-148680 | Hundido (Midway) | Zapata | 1 | 0 | 33.2K | Jan 1994 – Mar 2000 |
| Sanchez-McMurrey G-4-147579 | Hundido (Lobo) | Zapata | 1 | 0 | 33.2K | Dec 1993 – Feb 2000 |