| Briones, J.E. "A" G-4-147343 | Columbus Energy, LLC only | La Perla (Lobo Cons.) | Zapata | 1 | 35.6K | 12.3M | Nov 1993 – Apr 2026 |
| Bernardo Bustamante G.U. G-4-218454 | Killam Oil Co., Ltd. only | Jennings (Wilcox Consolidated) | Zapata | 1 | 4.92K | 930K | Jan 2006 – Jan 2016 |
| Bernardo Bustamante G. U. G-4-216033 | Killam Oil Co., Ltd. only | Jennings (Wilcox Consolidated) | Zapata | 1 | 2.87K | 539K | Jul 2005 – Jan 2007 |
| Briones, J.E. "A" G-4-149234 | Columbus Energy, LLC only | La Perla (Lobo Cons.) | Zapata | 1 | 2.64K | 4.45M | Apr 1994 – Apr 2026 |
| Martinez, B. M. G-4-79748 | Columbus Energy, LLC only | Laredo (Lobo) | Zapata | 1 | 1.75K | 565K | by Jan 1993 – Mar 2014 |
| Bustamante G.u.,bernardo G-4-194486 | Killam Oil Co., Ltd. only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.45K | 952K | Feb 2003 – Oct 2023 |
| Bustamante G. U. G-4-197661 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1.32K | 2.82M | Aug 2003 – Apr 2026 |
| Flores, L. G. G-4-153316 | Hilcorp Energy Company only | Bustamante (7950) | Zapata | 1 | 570 | 113K | Dec 1994 – Aug 2007 |
| Guadalupe G-4-186564 | Columbus Energy, LLC only | San Ygnacio, E. (Wilcox 8600) | Zapata | 1 | 310 | 509K | Nov 2001 – May 2017 |
| Bustamante Gas Unit 1 G-4-144759 | Hilcorp Energy Company only | Munoz (Lobo) | Zapata | 1 | 298 | 5.33M | Mar 1993 – Mar 2008 |
| Vela, J. G-4-246911 | Bustamante Oil Company only | Lopeno (Consolidated) | Zapata | 1 | 206 | 133K | Jul 2008 – Apr 2012 |
| Bustamante Gas Unit 1 G-4-140561 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 179 | 2.89M | by Jan 1993 – Oct 2014 |
| Bustamante Heirs G-4-131596 | Killam Oil Co., Ltd. only | Camaron Grande (11,800) | Zapata | 1 | 117 | 436K | by Jan 1993 – Jan 2016 |
| Briones, J. E. "B" G-4-155190 | Columbus Energy, LLC only | La Perla (Lobo Cons.) | Zapata | 1 | 73 | 467K | Jun 1995 – Aug 2023 |
| Bustamante Gas Unit 1 G-4-127136 | Hilcorp Energy Company only | Munoz (Lobo) | Zapata | 1 | 69 | 1.24M | by Jan 1993 – Apr 2026 |
| Bustamante Gas Unit No. 1 G-4-152599 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 69 | 339K | Dec 1994 – Apr 2026 |
| Bustamante Townsite G-4-127523 | Varas Energy Operating Company, only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 63 | 1.65M | by Jan 1993 – Apr 2026 |
| Briones, J.E. "A" G-4-157499 | Columbus Energy, LLC only | La Perla (Lobo Cons.) | Zapata | 1 | 60 | 921K | Feb 1996 – Jan 2024 |
| Bustamante Gas Unit 1 G-4-124924 | Hilcorp Energy Company only | Munoz (Lobo) | Zapata | 1 | 45 | 660K | by Jan 1993 – Feb 2023 |
| Bustamante Gas Unit 1 G-4-121827 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 42 | 315K | by Jan 1993 – Feb 2017 |
| Bustamante G. U. G-4-197290 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 36 | 712K | Aug 2003 – Apr 2026 |
| Bernardo Bustamante G.U. G-4-201864 | Killam Oil Co., Ltd. only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 17 | 1.81M | Mar 2004 – Dec 2020 |
| Bernardo Bustamante G. U. G-4-201865 | Killam Oil Co., Ltd. only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 17 | 4.19M | Mar 2004 – Apr 2026 |
| Bustamante Heirs G-4-208659 | Killam Oil Co., Ltd. only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 15 | 1.01M | Jan 2005 – Apr 2026 |
| Bustamante Gas Unit 1 G-4-223756 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 13 | 1.71M | Dec 2006 – Apr 2026 |
| Kinnally-Carter-Richardson G-4-184854 | Bustamante Oil Company only | Lopeno (Consolidated) | Zapata | 1 | 12 | 246K | Aug 2001 – Jan 2012 |
| Bustamante Gas Unit 1 G-4-227514 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 10 | 1.37M | Jun 2007 – Apr 2026 |
| Bernardo Bustamante G. U. G-4-207567 | Killam Oil Co., Ltd. only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 6 | 223K | Oct 2004 – Jun 2005 |
| Bustamante Gas Unit 1 G-4-127205 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 5 | 327K | by Jan 1993 – Mar 1997 |
| Bustamante Gas Unit 1 G-4-227172 | Hilcorp Energy Company only | Munoz (Lobo) | Zapata | 1 | 5 | 122K | Jan 2007 – Apr 2026 |
| Bustamante Gas Unit 1 G-4-227918 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 4 | 1.27M | May 2007 – Apr 2026 |
| Abelino G-4-179897 | Killam Oil Co., Ltd. only | Bustamante, South (Wilcox) | Zapata | 1 | 3 | 54.3K | Jul 2000 – Dec 2003 |
| Bustamante Gas Unit 1 G-4-238118 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 2 | 535K | Apr 2008 – Apr 2026 |
| Bustamante Gas Unit 1 G-4-124101 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 1 | 717 | Aug 1993 – Sep 1996 |
| Bustamante Gas Unit 1 G-4-225792 | Hilcorp Energy Company only | Haynes (Middle Wilcox Cons.) | Zapata | 1 | 0 | 0 | — |
| Bustamante Gas Unit 1 G-4-227507 | Hilcorp Energy Company only | Munoz (Lobo) | Zapata | 1 | 0 | 86.7K | Apr 2007 – May 2007 |
| Bustamante Gas Unit 1 G-4-223057 | Hilcorp Energy Company only | Munoz (Lobo) | Zapata | 1 | 0 | 188K | Sep 2006 – Nov 2006 |
| Bustamante Gas Unit 1 G-4-227823 | Forest Oil Corporation only | Wildcat | Zapata | 1 | 0 | 0 | — |
| Bustamante Gas Unit 1 G-4-217907 | Hilcorp Energy Company only | Wildcat | Zapata | 1 | 0 | 0 | — |
| Briones, J.E. "A" G-4-147978 | Columbus Energy Corp. only | La Mangana (Lobo 6) | Zapata | 1 | 0 | 15.2K | Jan 1994 – May 1994 |
| Garza G-4-82508 | Columbus Energy Corp. only | Hundido (Lobo) | Zapata | 1 | 0 | 3.45K | Feb 1993 – May 1993 |
| Bustamante, A. O-4-713 | Dugger, Glenn only | Escobas | Zapata | 2 | 0 | 0 | — |
| Bustamante, J. O-4-717 | Kleiner,c.j.est.-Turner & Fiske only | Escobas | Zapata | 1 | 0 | 0 | — |