| McAllen, A. A. G-4-177886 | Shell Western E&P only | McAllen Ranch (Vksbg. S-T-U, N.) | Hidalgo | 1 | 0 | 0 | May 2000 – Dec 2000 |
| Pharr Fieldwide Unit G-4-178499 | Shell Western E&P only | Pharr (Hensley) | Hidalgo | 1 | 0 | 3.02M | Jun 2000 – May 2010 |
| Shell-Santa FE G-4-178921 | CB Energy, LLC only | Santa FE (2590) | Brooks | 1 | 0 | 41.6K | Jul 2000 – Jul 2002 |
| Shell-Santa FE Ranch G-4-178927 | CB Energy, LLC only | Santa FE, East (6850) | Brooks | 1 | 0 | 151K | Jul 2000 – Nov 2002 |
| Beaurline, A. W. G-4-168937 | Shell Western E&P only | McAllen Ranch (Vicksburg S, E.) | Hidalgo | 1 | 0 | 263K | Jun 1998 – Dec 2009 |
| Southwest Farm & Ranch-State G-4-168572 | Shell Western E&P only | Hinde, West (Marker III Sd.) | Starr | 1 | 0 | 2.29M | Dec 1997 – Sep 2006 |
| Hamman Ranch G-4-114201 | Shell Western E&P Inc. only | Monte Christo (Vksbg HH) | Hidalgo | 1 | 0 | 0 | Jan 1993 – Apr 1994 |
| Hinojosa, G.G. G-4-168271 | Shell Western E&P only | Wildcat | Zapata | 1 | 0 | 1.77K | Feb 1998 – Jun 2001 |
| Santa FE Ranch G-4-168175 | Shell Western E&P Inc. only | Santa FE, East (Zone 3) | Brooks | 1 | 0 | 69.2K | Mar 1998 – Jul 1999 |
| Longoria, Octavio et al Gas Unit G-4-112202 | Shell Western E&P Inc. only | Lopez Ranch (Vksbg 10900 S) | Brooks | 1 | 0 | 42.6K | Jan 1993 – Sep 1993 |
| Guerra, E. E. Jr. G-4-49297 | Shell Western E&P only | Schmidt (Frio Vicksburg) | — | 1 | 0 | 486K | Jan 1993 – Jan 2007 |
| Chapman, J. O. G-4-168069 | Shell Western E&P Inc. only | Chapman Ranch (9650) | Nueces | 1 | 0 | 0 | Sep 1997 – Jul 1998 |
| Santa FE Ranch G-4-168068 | Shell Western E&P Inc. only | Santa FE, East (Massive 1ST 2) | Brooks | 1 | 0 | 6.58K | Mar 1998 – Jan 1999 |
| Beaurline, A. W. G-4-111299 | Shell Western E&P Inc. only | Los Indios, SW. (Frio 6000) | Hidalgo | 1 | 0 | 0 | Jan 1993 – Jan 2000 |
| Santa FE Ranch G-4-168063 | Shell Western E&P only | Santa FE, East (Zone 3) | Brooks | 1 | 0 | 66.3K | Mar 1998 – Sep 2011 |
| State-Slick G-4-167529 | Shell Western E&P only | Wildcat | Starr | 1 | 0 | 218K | May 1996 – Dec 2006 |
| Beaurline, A. W. G-4-110796 | Shell Western E&P Inc. only | McAllen Ranch(vicksburg-U-V-,se) | Hidalgo | 1 | 0 | 430K | Jan 1993 – Jun 1998 |
| Wiesehan-Walker Gas Unit G-4-48443 | Shell Western E&P only | McCook, E. (Vicksburg, Lo.) | — | 1 | 0 | 0 | Jan 1993 – Mar 2000 |
| S.T. 446L SW, Shell S.T. 77323 G-3-104741 | Capco Offshore of Texas, Inc. only | Brazos Block 446L SW-4 (M15C) | Brazos-LB | 1 | 0 | 0 | Jan 1993 – Jul 2017 |
| Santa FE Ranch G-4-166613 | Shell Western E&P only | Santa FE, East (Zone 3) | Brooks | 1 | 0 | 581K | Nov 1997 – Sep 2011 |
| Christian, Woods G-4-166503 | Shell Western E&P only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 0 | 1.72M | Nov 1997 – Jan 2005 |
| McAllen, A. A. G-4-110673 | Shell Western E&P only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 0 | 1.17M | Jan 1993 – Sep 2006 |
| Chapman, J. O. G-4-166317 | Shell Western E&P Inc. only | Mobil-David, W. (Anderson) | Nueces | 1 | 0 | 0 | Nov 1997 – May 1998 |
| Beaurline, A.W. G-4-163873 | Shell Western E&P only | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 0 | 1.61M | Jun 1997 – Dec 2001 |
| SW Farm & Ranch - State of TX G-4-110316 | Shell Western E&P only | Hinde,west (Vicksburg-18) | Starr | 1 | 0 | 356K | Jan 1993 – Dec 2006 |
| Chapman, J. O. G-4-45804 | Shell Western E&P Inc. only | Chapman Ranch (L-23) | — | 1 | 0 | 0 | Jan 1993 – Nov 1996 |
| McAllen, A.A. G-4-163796 | Shell Western E&P only | McAllen Ranch (Vicksburg R Cent) | Hidalgo | 1 | 0 | 0 | May 1997 – Mar 2002 |
| La Blanca Gas Unit G-4-163654 | Shell Western E&P Inc. only | La Blanca (Frio 11300) | Hidalgo | 1 | 0 | 194K | Mar 1997 – Jan 1998 |
| Santa FE Ranch G-4-110142 | Shell Western E&P only | Santa FE, East (Massive 1ST 5) | Brooks | 1 | 0 | 0 | Jan 1993 – Oct 2013 |
| State Slick "D" G-4-163624 | Shell Western E&P only | Borosa, S. (T-4) | Starr | 1 | 0 | 850K | Jun 1996 – Dec 2006 |
| La Blanca Gas Unit G-4-163568 | Shell Western E&P Inc. only | La Blanca (Hamilton) | Hidalgo | 1 | 0 | 3.64K | Feb 1997 – Sep 1997 |
| Hinojosa, G. G. G-4-108737 | Shell Western E&P only | Fandango (Wilcox, Upper T10) | Zapata | 1 | 0 | 111K | Jan 1993 – Jun 2001 |
| McAllen, A. A. G-4-45725 | Shell Western E&P only | McAllen Ranch (Vicksburg S, S.) | — | 1 | 0 | 329K | Jan 1993 – Apr 2000 |
| Shelly Branch Unit No. 2 G-3-100625 | Exxon Corp. only | Giddings (Austin Chalk, Gas) | Lee | 1 | 0 | 0 | Jan 1993 – Sep 1996 |
| Ryals, Shelly G-2-135011 | Laquey, E. C. only | Refugio Heard (Area) | — | 1 | 0 | 0 | Jan 1993 – May 1993 |
| Legacy Btlt (Shell) #1 G-4-162173 | Legacy Corporation, The only | Javelina (Nuevo Stray) | Hidalgo | 1 | 0 | 3.59K | Feb 1997 – Oct 1997 |
| Ferguson, Belle Gas Unit G-4-161413 | Shell Western E&P only | Belle Ferguson (Lo. Frio Cons.) | Hidalgo | 1 | 0 | 4.4M | Oct 1996 – Jul 2007 |
| Muzza, G. P. G-4-107527 | Shell Western E&P only | Fandango (Wilcox, Upper T2-T3) | Zapata | 1 | 0 | 3.65M | Jan 1993 – Jan 2001 |
| McAllen, A. A. G-4-161036 | Shell Western E&P only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 0 | 10.9M | Jul 1996 – Apr 2007 |
| McAllen, A. A. "A" G-4-159926 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg K Cons) | Hidalgo | 1 | 0 | 1.81K | May 1996 – Jul 1998 |
| La Copita Gas Unit G-4-106343 | Shell Western E&P Inc. only | La Copita (Vicksburg Z) | Starr | 1 | 0 | 0 | Jan 1993 – Sep 1994 |
| McAllen, A. A. G-4-44579 | Shell Western E&P only | McAllen Ranch (Vicksburg S) | — | 1 | 0 | 880K | Jan 1993 – Nov 2000 |
| Boston Texas Land & Trust G-4-159248 | Shell Western E&P only | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 0 | 420K | Apr 1996 – May 2009 |
| Woods Christian G-4-158836 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg K Cons) | Hidalgo | 1 | 0 | 32.2K | May 1996 – Mar 1998 |
| Bright & Schiff Hamman Gas Unit G-4-104355 | Shell Western E&P Inc. only | Monte Christo (Vicksburg 15300) | Hidalgo | 1 | 0 | 0 | Jan 1993 – Jun 1993 |
| Woods Christian G-4-158746 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg L) | Hidalgo | 1 | 0 | 125K | May 1996 – Jun 1999 |
| McAllen, A.A. G-4-158636 | Shell Western E&P only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 0 | 1.92M | Feb 1996 – Oct 2008 |
| Ed Rachal "Shell" G-4-104028 | Lewis Petro Properties, Inc. only | Gold River (Olmos) | Webb | 1 | 0 | 6.27K | Jan 1993 – Oct 1999 |
| Garza, A. M., -State- G-4-42817 | Shell Western E&P Inc. only | Rincon, N. (Vicksburg Cons.) | — | 1 | 0 | 194K | Jan 1993 – Oct 1999 |
| Shelly Branch Unit G-3-98992 | Exxon Corp. only | Giddings (Austin Chalk, Gas) | Lee | 1 | 0 | 24.8K | Jan 1993 – Mar 1994 |