| Santa FE Ranch G-4-83809 | Shell Western E&P only | Santa FE, East (Massive 1ST 2) | Brooks | 1 | 0 | 228K | Jan 1993 – Sep 2011 |
| Santa FE Ranch-Julian State G-4-83857 | Shell Western E&P Inc. only | Julian, North (I-92) | Kenedy | 1 | 0 | 117K | Jan 1993 – Dec 1998 |
| McAllen, A.A. G-4-84523 | Shell Western E&P only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 0 | 3.51M | Jan 1993 – Jun 2006 |
| Christian, Woods G-4-85735 | Shell Western E&P only | McAllen Ranch (Vicksburg S) | Hidalgo | 1 | 0 | 1.06M | Jan 1993 – Aug 2000 |
| Chapman, J.O. G-4-86013 | Shell Western E&P Inc. only | Chapman Ranch (8400) | Nueces | 1 | 0 | 0 | Jan 1993 – Jun 1998 |
| McAllen, A.A. G-4-86030 | Shell Western E&P only | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 0 | 1.48M | Jan 1993 – Jan 2010 |
| Lips, Barbara "C" (Ecr) G-4-87799 | Shell Western E&P Inc. only | Rucias N. (FB D) | Brooks | 1 | 0 | 6.01M | Jan 1993 – Aug 1998 |
| Lips, Barbara G-4-88563 | Shell Western E&P Inc. only | McAllen Ranch,n(vksbg. LO 14700) | Hidalgo | 1 | 0 | 0 | Jan 1993 – Apr 1993 |
| Christian, Woods G-4-88720 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg Q) | Hidalgo | 1 | 0 | 0 | Jan 1993 – May 1993 |
| Davis, W.J. G-4-88723 | Shell Western E&P only | McCook, E. (Vicksburg 13,700) | Hidalgo | 1 | 0 | 1.14M | Jan 1993 – Sep 2008 |
| Lloyd, F. B. G-4-89818 | Shell Western E&P Inc. only | Rosita, NW (Wilcox R-S-U Cons.) | Duval | 1 | 0 | 0 | Jan 1993 – Feb 1997 |
| Lips, Barbara "B" G-4-89858 | Shell Western E&P Inc. only | Lopez Ranch (Vksbg 12250) | Brooks | 1 | 0 | 0 | Jan 1993 – Apr 1993 |
| Christian, Woods G-4-92246 | Shell Western E&P Inc. only | Guadalupe (Vicksburg L) | Hidalgo | 1 | 0 | 0 | Jan 1993 – Feb 1993 |
| Martinez-State G-4-92978 | Shell Western E&P only | Rincon, N. (Vicksburg Cons.) | Starr | 1 | 0 | 202K | Jan 1993 – Oct 2005 |
| Bright & Schiff Hamman G.U. G-4-93764 | Shell Western E&P Inc. only | Monte Christo (Vksbg-Eckart) | Hidalgo | 1 | 0 | 0 | Jan 1993 – Jun 1993 |
| McAllen, A.A. G-4-94774 | Shell Western E&P only | McAllen Ranch (Vicksburg S, SE.) | Hidalgo | 1 | 0 | 1.85M | Jan 1993 – Mar 2002 |
| Christian, Woods G-4-96191 | Shell Western E&P only | McAllen Ranch (Vicksburg S) | Hidalgo | 1 | 0 | 428K | Jan 1993 – Jun 2000 |
| Lopez, Hector G-4-99074 | Shell Western E&P Inc. only | Lopez Ranch (Vksbg 10900) | Brooks | 1 | 0 | 0 | Jan 1993 – Apr 1997 |
| State Slick "D" G-4-99981 | Shell Western E&P only | Hinde (Vicksburg Consolidated) | Starr | 1 | 0 | 14.6K | Jan 1993 – Jun 2008 |
| Mustang Island State Park TR 2 G-4-102472 | Lamay Corporation only | Shell Point (G-1) | Nueces | 1 | 0 | 0 | Jan 1993 – Jul 2026 |
| Ed Rachal "Shell" G-4-104028 | Lewis Petro Properties, Inc. only | Gold River (Olmos) | Webb | 1 | 0 | 6.27K | Jan 1993 – Oct 1999 |
| 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 |
| 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 |
| 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 |
| Hinojosa, G. G. G-4-108737 | Shell Western E&P only | Fandango (Wilcox, Upper T10) | Zapata | 1 | 0 | 111K | Jan 1993 – Jun 2001 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| 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 |
| Hamman Ranch G-4-114201 | Shell Western E&P Inc. only | Monte Christo (Vksbg HH) | Hidalgo | 1 | 0 | 0 | Jan 1993 – Apr 1994 |
| Cook G-4-115440 | Shell Western E&P only | McAllen (Elkins 6300) | Hidalgo | 1 | 0 | 1.37M | Jan 1993 – Apr 2007 |
| Leyendecker, G.L. G-4-116472 | Shell Western E&P only | Fandango (Wilcox, Upper T2-T3) | Zapata | 1 | 0 | 300K | Jan 1993 – Nov 2002 |
| Santa FE Ranch G-4-116514 | Shell Western E&P only | Santa FE, East (Massive 1ST 2) | Brooks | 1 | 0 | 0 | Jan 1993 – Sep 2011 |
| Santa FE Ranch G-4-116976 | Shell Western E&P Inc. only | Santa FE, East (Massive 1ST 1) | Brooks | 1 | 0 | 0 | Jan 1993 – Nov 1997 |
| Slick, T. B. Estate G-4-117053 | Shell Western E&P only | Hinde (Vicksburg Consolidated) | Starr | 1 | 0 | 76.1K | Jan 1993 – Dec 2006 |
| Garza, A.M. G-4-117327 | Shell Western E&P Inc. only | Rincon, North (Frio P) | — | 1 | 0 | 0 | Jan 1993 – Apr 1993 |
| McAllen, A. A. "A" G-4-117877 | Shell Western E&P Inc. only | McAllen Ranch (Vicksburg L) | Hidalgo | 1 | 0 | 481K | Jan 1993 – Aug 1994 |
| Mustang Is. St. PK Tract 2 G-4-118613 | Oldfield Acquisition LP only | Shell Point (18 Sand) | Nueces | 1 | 0 | 0 | Jan 1993 – Sep 1994 |
| Mustang Island State Park TR 2 G-4-118857 | Lamay Corporation only | Shell Point (6A) | Nueces | 1 | 0 | 0 | Jan 1993 – Jun 2021 |
| Beaurline, A. W. G-4-119440 | Shell Western E&P only | McAllen Ranch(vicksburg-U-V-,se) | Hidalgo | 1 | 0 | 14.9K | Jan 1993 – Jan 2002 |
| Schmidt, J.M. Gas Unit G-4-119702 | Shell Western E&P Inc. only | Schmidt (Vicksburg 14600) | Hidalgo | 1 | 0 | 53.5K | Jan 1993 – Oct 1993 |
| Chapman, J. O. G-4-120196 | Shell Western E&P Inc. only | Chapman Ranch (L-23) | Nueces | 1 | 0 | 0 | Jan 1993 – Apr 1998 |
| Davenport, O. H. Heirs G-4-120469 | Shell Western E&P only | Hinde, West (Vicksburg 8) | Starr | 1 | 0 | 0 | Jan 1993 – Dec 2006 |
| Beaurline, A. W. G-4-121251 | Shell Western E&P Inc. only | McAllen Ranch (Guerra) | Hidalgo | 1 | 0 | 582K | Jan 1993 – Nov 1996 |
| Guerra, E.E. Jr. G-4-122823 | Shell Western E&P Inc. only | McAllen Ranch (Guerra) | Hidalgo | 1 | 0 | 0 | Jan 1993 – Oct 1994 |
| Zachry, H.B. Co. G-4-123378 | Shell Western E&P only | Fandango (Wilcox, Upper T10) | Zapata | 1 | 0 | 0 | Jan 1993 – Nov 2002 |
| Guerra, E.E. "A" G-4-124161 | Shell Western E&P Inc. only | McAllen Ranch (Guerra) | Hidalgo | 1 | 0 | 0 | Jan 1993 – Sep 1996 |
| McAllen, A. A. G-4-124360 | Shell Western E&P only | McAllen Ranch (Vksbg L-V, N Cons | Hidalgo | 1 | 0 | 981K | Jan 1993 – Jan 2010 |