| Jerico, Ltd. Gas Unit G-4-142222 | Shell Western E&P | Cadre (Vicksburg Patriot) | Hidalgo | 1 | 387K | 23M | Jan 1993 – Jan 2002 |
| McAllen, A. A. G-4-149439 | Shell Western E&P | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 350K | 12.6M | Apr 1994 – Jan 2001 |
| McAllen, A. A. G-4-161036 | Shell Western E&P | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 301K | 10.9M | Jul 1996 – Oct 2004 |
| McAllen Fieldwide Unit G-4-172983 | Shell Western E&P | McAllen (Consolidated FB-B) | Hidalgo | 1 | 225K | 19.6M | Sep 1998 – Jan 2006 |
| Jerico, Ltd. Gas Unit G-4-145427 | Shell Western E&P | Cadre (Vicksburg Patriot) | Hidalgo | 1 | 116K | 7.44M | Apr 1993 – Feb 2002 |
| Holland, W. H. Gas Unit G-4-188511 | Shell Western E&P | McAllen Ranch (Vicksburg N) | Hidalgo | 1 | 88.5K | 5.46M | Dec 2001 – May 2006 |
| McAllen, A.A. G-4-156005 | Shell Western E&P | McAllen Ranch (Vicksburg S, S.) | Hidalgo | 1 | 81.6K | 2.94M | Oct 1995 – Jun 1997 |
| McAllen, A. A. G-4-137558 | Shell Western E&P | McAllen Ranch (Vicksburg S, SE.) | Hidalgo | 1 | 76.7K | 2.32M | May 1993 – Nov 1995 |
| McAllen, A.A. G-4-84523 | Shell Western E&P | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 65.2K | 3.51M | Jan 1993 – Sep 1998 |
| McAllen, A. A. G-4-37083 | Shell Western E&P | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 63K | 3.2M | Jan 1993 – Aug 2003 |
| Christian, Woods G-4-139433 | Shell Western E&P | McAllen Ranch (Vicksburg N) | Hidalgo | 1 | 58.8K | 4.91M | Jan 1993 – Oct 2008 |
| McAllen Fieldwide Unit G-4-185710 | Shell Western E&P | McAllen (Hansen) | Hidalgo | 1 | 52K | 2.3M | Nov 2000 – Sep 2006 |
| Pharr Fieldwide Unit G-4-169612 | Shell Western E&P | Pharr (Reichert) | Hidalgo | 1 | 51.6K | 5.99M | May 1998 – Jun 2005 |
| McAllen, A.A. G-4-86030 | Shell Western E&P | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 47.4K | 1.48M | Jan 1993 – Jun 1998 |
| Slick, T. B. Estate G-4-191583 | Shell Western E&P | El Ebanito (Yegua) | Starr | 1 | 42.5K | 2.38M | Aug 2001 – Jan 2011 |
| McAllen, A. A. "B" G-4-147175 | Shell Western E&P | McAllen Ranch (Vicksburg L, R-1) | Hidalgo | 1 | 42.3K | 660K | Oct 1993 – May 1995 |
| Ferguson, Belle Gas Unit G-4-161413 | Shell Western E&P | Belle Ferguson (Lo. Frio Cons.) | Hidalgo | 1 | 39.3K | 4.4M | Oct 1996 – Aug 2005 |
| McConnell State 55-1-42 Lov G-10-277234 | Shell Western E&P | Sandbar (Bone Spring) | Loving | 1 | 38.5K | 838K | Dec 2011 – Aug 2014 |
| McAllen, A.A. G-4-94774 | Shell Western E&P | McAllen Ranch (Vicksburg S, SE.) | Hidalgo | 1 | 38.2K | 1.85M | Jan 1993 – Dec 1995 |
| Jerico, Ltd Gas Unit G-4-152412 | Shell Western E&P | Cadre (Vicksburg Patriot) | Hidalgo | 1 | 37.4K | 1.9M | Nov 1994 – Sep 2000 |
| Slick, T. B. Estate G-4-191405 | Shell Western E&P | El Ebanito (LWR Vicksburg Cons) | Starr | 1 | 34K | 1.55M | Apr 2002 – Jun 2003 |
| Southwest Farm & Ranch-State G-4-168572 | Shell Western E&P | Hinde, West (Marker III Sd.) | Starr | 1 | 33.8K | 2.29M | Dec 1997 – Aug 2005 |
| McAllen, A.A. G-4-81976 | Shell Western E&P | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 30.8K | 2.08M | Jan 1993 – Sep 2003 |
| Beaurline, A.W. G-4-163873 | Shell Western E&P | McAllen Ranch (Vicksburg y, E.) | Hidalgo | 1 | 29.3K | 1.61M | Jul 1997 – May 2000 |
| McAllen, A. A. G-4-60121 | Shell Western E&P | McAllen Ranch (Vicksburg S, SE.) | Hidalgo | 1 | 28.6K | 1.53M | Jan 1993 – Mar 1998 |
| McAllen, A.A. G-4-158636 | Shell Western E&P | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 26.6K | 1.92M | Feb 1996 – Sep 2000 |
| Slick, T. B. Estate G-4-205382 | Shell Western E&P | El Ebanito (Yegua) | Starr | 1 | 25.9K | 1.68M | Sep 2004 – Sep 2010 |
| Davis, W.J. G-4-88723 | Shell Western E&P | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 25K | 1.14M | Mar 1993 – Mar 2005 |
| McAllen Fieldwide Unit G-4-148678 | Shell Western E&P | McAllen (9400) | Hidalgo | 1 | 23.5K | 932K | Nov 1993 – Nov 2009 |
| Wood Christian G-4-174531 | Shell Western E&P | McAllen Ranch (Vicksburg N) | Hidalgo | 1 | 22.8K | 544K | Oct 1999 – Apr 2002 |
| McAllen, A. A. G-4-54803 | Shell Western E&P | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 22.7K | 712K | Jan 1993 – Dec 2003 |
| Christian, Woods G-4-96191 | Shell Western E&P | McAllen Ranch (Vicksburg S) | Hidalgo | 1 | 22.2K | 428K | Jan 1993 – Dec 1998 |
| Johnson 54-2-24 Lov G-10-277188 | Shell Western E&P | Sandbar (Bone Spring) | Loving | 1 | 22.1K | 155K | Apr 2013 – Jun 2015 |
| McAllen, A. A. G-4-110673 | Shell Western E&P | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 21.8K | 1.17M | Jan 1993 – Mar 2000 |
| Christian, Woods G-4-166503 | Shell Western E&P | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 21.3K | 1.72M | Nov 1997 – Nov 2001 |
| Esparza, Pablo, et al Unit G-4-31290 | Shell Western E&P | McAllen, South (J-8) | Hidalgo | 1 | 21.1K | 2.38M | Jan 1993 – Oct 2007 |
| McAllen, A. A. G-4-44579 | Shell Western E&P | McAllen Ranch (Vicksburg S) | Hidalgo | 1 | 20.9K | 880K | Jan 1993 – Oct 2000 |
| Christian, Woods G-4-85735 | Shell Western E&P | McAllen Ranch (Vicksburg S) | Hidalgo | 1 | 20.9K | 1.06M | Jan 1993 – Jan 2000 |
| Mc Allen,a.a. G-4-57030 | Shell Western E&P | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 20.3K | 852K | Dec 1994 – Jan 2007 |
| Pharr Fieldwide Unit G-4-178499 | Shell Western E&P | Pharr (Hensley) | Hidalgo | 1 | 20.2K | 3.02M | Jun 2000 – May 2010 |
| McAllen, A. A. G-4-158393 | Shell Western E&P | McAllen Ranch (Vksbg P-V,s Cons) | Hidalgo | 1 | 19.8K | 506K | Apr 1996 – Nov 1996 |
| Hanging H 55-1-32 Lov G-10-275867 | Shell Western E&P | Sandbar (Bone Spring) | Loving | 1 | 17.7K | 229K | Sep 2013 – Jun 2014 |
| State Slick "D" G-4-163624 | Shell Western E&P | Borosa, S. (T-4) | Starr | 1 | 17.4K | 850K | Jun 1996 – Nov 1997 |
| McAllen,a.a. G-4-57433 | Shell Western E&P | McAllen Ranch (Vicksburg S, S.) | Hidalgo | 1 | 16.3K | 617K | Jan 1993 – Apr 1996 |
| Pharr Fieldwide Unit G-4-151646 | Shell Western E&P | McAllen (Hansen) | Hidalgo | 1 | 16.2K | 1.47M | May 1994 – Dec 2009 |
| Woods Christian G-4-135979 | Shell Western E&P | McAllen Ranch (Vicksburg K Cons) | Hidalgo | 1 | 15.9K | 321K | Jan 1993 – Jan 2000 |
| Boston Texas Land & Trust G-4-159248 | Shell Western E&P | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 15.5K | 420K | May 1996 – Aug 2003 |
| Cummins-V G-10-43217 | Shell Western E&P | Goldsmith, N. (San Andres, Con.) | — | 0 | 15K | 14.1K | Apr 2013 – Apr 2013 |
| Woods, Christian G-4-172593 | Shell Western E&P | McAllen Ranch (Vicksburg N) | Hidalgo | 1 | 14.6K | 723K | Mar 1999 – Jan 2000 |
| T B Slick Estate G-4-197667 | Shell Western E&P | El Ebanito (Yegua) | Starr | 1 | 14.4K | 710K | Jul 2003 – Jan 2007 |