| Parker, Dorothy S. G-3-156432 | Shell Western E&P Inc. only | Wildcat | Matagorda | 1 | 0 | 0 | Oct 1994 – Oct 1997 |
| State Lease M-96872 G-3-165043 | Shell Offshore Inc. only | Putski (Marg. A) | Galveston-LB | 1 | 0 | 487K | Nov 1996 – Nov 1999 |
| High Island State Tract 10-L G-3-226399 | Shell Offshore Inc. only | Wildcat | High IS-LB | 1 | 0 | 0 | Jun 2005 – Jan 2008 |
| Chapman, J. O. G-4-9814 | Shell Western E&P Inc. only | Chapman Ranch (L-20) | — | 1 | 0 | 0 | Jan 1993 – Nov 1996 |
| Bentsen Bros. -B- G-4-11362 | Shell Western E&P Inc. only | La Copita (Vicksburg Lower) | Starr | 1 | 0 | 0 | Jan 1993 – Jan 1995 |
| Bentsen Bros. -B- G-4-11363 | Shell Western E&P only | La Copita (Vicksburg Lower) | Starr | 1 | 0 | 148K | Jan 1993 – Feb 2006 |
| Christian, Woods G-4-11968 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg P, Q) | Hidalgo | 1 | 0 | 217K | Jan 1993 – Nov 1998 |
| Christian, Woods G-4-11970 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg Q) | Hidalgo | 1 | 0 | 1.65M | Jan 1993 – Nov 1997 |
| Garza, A. M.,-State G-4-12989 | Shell Western E&P Inc. only | Rincon, N. (Vicksburg Cons.) | — | 1 | 0 | 0 | Jan 1993 – Oct 1999 |
| Garza, A. M., State G-4-13023 | Shell Western E&P only | Rincon, N. (Vicksburg Cons.) | — | 1 | 0 | 0 | Jan 1993 – Mar 2008 |
| McAllen, A. A. G-4-14054 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg R) | — | 1 | 0 | 11.2K | Jan 1993 – Mar 1996 |
| Santa FE Ranch G-4-14063 | Shell Western E&P Inc. only | Santa FE, East (Massive 1ST 1E.) | Brooks | 1 | 0 | 61.6K | Jan 1993 – Jan 1999 |
| Santa FE Ranch G-4-14065 | Shell Western E&P Inc. only | Santa FE, East (Massive 2ND) | Brooks | 1 | 0 | 19.1K | Jan 1993 – Mar 1998 |
| Esparza, Pablo, et al Unit G-4-31290 | Shell Western E&P only | McAllen, South (J-8) | — | 1 | 0 | 2.38M | Jan 1993 – Oct 2010 |
| Santa FE Ranch G-4-33207 | Shell Western E&P Inc. only | Santa FE, East (Massive 1ST 5) | Brooks | 1 | 0 | 118K | Jan 1993 – Mar 1998 |
| McAllen, A. A. G-4-34507 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg S) | — | 1 | 0 | 219K | Jan 1993 – Jun 1997 |
| Santa FE Ranch G-4-36231 | Shell Western E&P only | Santa FE, East (Massive 1ST 5) | Brooks | 1 | 0 | 0 | Jan 1993 – Feb 2004 |
| McAllen, A. A. G-4-37083 | Shell Western E&P only | McAllen Ranch (Vksbg P-V,s Cons) | — | 1 | 0 | 3.2M | Jan 1993 – Jan 2006 |
| Chapman, J. O. G-4-38433 | Shell Western E&P Inc. only | Mobil-David, W. (Howell Hight) | Nueces | 1 | 0 | 0 | Jan 1993 – Jan 1997 |
| McAllen Fieldwide Unit G-4-41185 | Shell Western E&P only | McAllen (Marks FB C) | — | 1 | 0 | 1.65M | Jan 1993 – Nov 2006 |
| Garza, A. M., -State- G-4-42817 | Shell Western E&P Inc. only | Rincon, N. (Vicksburg Cons.) | — | 1 | 0 | 194K | Jan 1993 – Oct 1999 |
| McAllen, A. A. G-4-44579 | Shell Western E&P only | McAllen Ranch (Vicksburg S) | — | 1 | 0 | 880K | Jan 1993 – Nov 2000 |
| McAllen, A. A. G-4-45725 | Shell Western E&P only | McAllen Ranch (Vicksburg S, S.) | — | 1 | 0 | 329K | Jan 1993 – Apr 2000 |
| Chapman, J. O. G-4-45804 | Shell Western E&P Inc. only | Chapman Ranch (L-23) | — | 1 | 0 | 0 | Jan 1993 – Nov 1996 |
| Wiesehan-Walker Gas Unit G-4-48443 | Shell Western E&P only | McCook, E. (Vicksburg, Lo.) | — | 1 | 0 | 0 | Jan 1993 – Mar 2000 |
| Guerra, E. E. Jr. G-4-49297 | Shell Western E&P only | Schmidt (Frio Vicksburg) | — | 1 | 0 | 486K | Jan 1993 – Jan 2007 |
| McAllen, A. A. G-4-53154 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg T, SE.) | Hidalgo | 1 | 0 | 0 | Jan 1993 – Jul 1997 |
| McAllen, A. A. G-4-54803 | Shell Western E&P only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 0 | 712K | Jan 1993 – Feb 2006 |
| McAllen, A. A. G-4-54906 | Shell Western E&P only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 0 | 65.7K | Jan 1993 – Mar 2011 |
| Chapman, J. O. G-4-55009 | Shell Western E&P Inc. only | Chapman Ranch (L-24) | — | 1 | 0 | 0 | Jan 1993 – Dec 1996 |
| McAllen, A. A. G-4-55456 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg S, S.) | Hidalgo | 1 | 0 | 88.2K | Jan 1993 – Dec 1996 |
| Mc Allen, A. A. G-4-56380 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg R Cent) | Hidalgo | 1 | 0 | 0 | Jan 1993 – Jun 1998 |
| McAllen, A.A. G-4-56863 | Shell Western E&P only | McAllen Ranch (Vicksburg S) | Hidalgo | 1 | 0 | 15.3K | Jan 1993 – Aug 2001 |
| Mc Allen,a.a. G-4-57030 | Shell Western E&P only | McAllen Ranch (Vksbg P-V,s Cons) | — | 1 | 0 | 852K | Jan 1993 – Sep 2010 |
| McAllen,a.a. G-4-57433 | Shell Western E&P only | McAllen Ranch (Vicksburg S, S.) | — | 1 | 0 | 617K | Jan 1993 – Oct 2000 |
| McAllen, A. A. G-4-60121 | Shell Western E&P only | McAllen Ranch (Vicksburg S, SE.) | — | 1 | 0 | 1.53M | Jan 1993 – Dec 2000 |
| McAllen, A.A. SWD G-4-61246 | Shell Western E&P only | McAllen Ranch (Vicksburg K Cons) | — | 1 | 0 | 0 | Jan 1993 – Oct 2010 |
| Hopkins, M.A. Gas Unit G-4-65513 | Shell Western E&P Inc. only | McCook, E. (Vicksburg, Lo.-Y) | Hidalgo | 1 | 0 | 0 | Jan 1993 – Jan 1997 |
| Bentsen Bros.-State G-4-67001 | Shell Western E&P only | La Copita (Vicksburg Lower) | Starr | 1 | 0 | 361K | Jan 1993 – Sep 2000 |
| McAllen,a. A. G-4-67648 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg S, SE.) | — | 1 | 0 | 80.1K | Jan 1993 – Dec 1997 |
| McAllen, A. A. G-4-67649 | Shell Western E&P only | McAllen Ranch (Vicksburg S, SE.) | Hidalgo | 1 | 0 | 173K | Jan 1993 – May 2000 |
| Howell, J. J. G-4-72387 | Shell Western E&P Inc. only | Lacopita (Vicksburg Z 2) | Starr | 1 | 0 | 117K | Jan 1993 – Sep 1994 |
| Santa FE Ranch G-4-72676 | Shell Western E&P only | Santa FE, East (Massive 1ST, 4) | Brooks | 1 | 0 | 15.1K | Jan 1993 – Sep 2011 |
| Bentsen Bros. "B" G-4-72955 | Shell Western E&P Inc. only | La Copita (Vicksburg Z) | Starr | 1 | 0 | 0 | Jan 1993 – Jul 1994 |
| Hoskinson, Gladys R. Gas Unit 1 G-4-73808 | EOG Resources, Inc. only | Midway, South (Shell Deep) | San Patricio | 1 | 0 | 978K | Jan 1993 – Sep 2003 |
| Chapman, J. O. G-4-79219 | Shell Western E&P Inc. only | Chapman Ranch (2980) | Nueces | 1 | 0 | 0 | Jan 1993 – Apr 1998 |
| Lips, Barbara G-4-79897 | Shell Western E&P Inc. only | Lips Ranch (Vicksburg) | Hidalgo | 1 | 0 | 0 | Jan 1993 – May 1993 |
| Christian Woods G-4-80762 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg N) | Hidalgo | 1 | 0 | 68K | Jan 1993 – Nov 1994 |
| Shell "B" G-4-81607 | Hec Petroleum, Inc. only | Midway, South (Frio Deep) | San Patricio | 1 | 0 | 34.2K | Jan 1993 – Aug 2003 |
| McAllen, A.A. G-4-81976 | Shell Western E&P only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 0 | 2.08M | Jan 1993 – Mar 2006 |