| Tom O'Connor (5730 Ft. Sd.) Unit O-2-8569 | Hilcorp Energy Company only | Tom O'Connor (5730, East) | Refugio | 38 | 1.01M | 815K | Oct 2000 – Apr 2026 |
| Clay Pasture -B- State Unit O-2-9381 | T-C Oil Company, LLC only | Anaqua, South (3000) | Refugio | 3 | 539K | 104K | Dec 2009 – Apr 2026 |
| O'Connor, Dennis et al -N- O-2-8738 | T-C Oil Company, LLC only | Huff (3000, FB-W) | Refugio | 1 | 205K | 133K | Sep 2002 – Apr 2026 |
| O'Conner, Mary Ellen O-2-6698 | Dolphin Petroleum, LP only | Mary Ellen Oconnor (FQ-30) | Refugio | 3 | 174K | 391K | Jan 1993 – Jul 2016 |
| Williams, Maude et al -A- O-2-5125 | Hilcorp Energy Company only | Lake Pasture (FT-730) | Refugio | 4 | 131K | 365K | Jan 1993 – Feb 2006 |
| O'Connor-H-Clay Past-State Unit O-2-11509 | T-C Oil Company, LLC only | Anaqua (5300) | Refugio | 1 | 68.9K | 198K | Apr 2018 – May 2024 |
| Anderson, Mary Alice et al "A" O-2-8571 | Maran Oil Company only | Fagan (5830) | Refugio | 2 | 65.7K | 90.2K | Nov 2000 – Feb 2015 |
| Meoc-Mellon-State Unit G-2-295806 | T-C Oil Company, LLC only | Mary Ellen O'Connor (8300) | Refugio | 1 | 63.1K | 168K | May 2023 – Apr 2026 |
| O'Connor -H- O-2-12315 | T-C Oil Company, LLC only | Anaqua, South (3000) | Refugio | 1 | 56.5K | 14K | Jan 2022 – Apr 2026 |
| Clay Pasture -B- State Unit O-2-10101 | T-C Oil Company, LLC only | Anaqua (3000) | Refugio | 1 | 56.2K | 17.6K | Jan 2012 – Apr 2026 |
| Wood River Ranch 'B' O-2-10563 | Kebo Oil & Gas, Inc. only | Woodsboro (6300 Sand) | Refugio | 1 | 53.2K | 21.2K | May 2013 – Feb 2020 |
| Little, G. W. O-2-3762 | Summit Resources Mgmt., LLC. only | Zarsky, S. (Frio 8300) | Refugio | 1 | 51.1K | 22 | Jan 1993 – Oct 2006 |
| Messer, W.H. Jr. et Al O-2-6453 | Cimarron Engineering, LLC only | Bonnie View, South (5300) | Refugio | 1 | 41.3K | 20 | Jan 1993 – Feb 2016 |
| Scanio/Shelton G-2-241967 | High Plains Gas Systems, Inc. only | Mission River (8300 Vksbg) | Refugio | 1 | 30.2K | 611K | Aug 2008 – Dec 2014 |
| Miguelita Scanio O-2-10364 | Digital Operating Company LLC only | Tom Oconnor (7300) | Refugio | 1 | 25.5K | 48K | Jul 2012 – Mar 2020 |
| Braman -A- G-2-286087 | T-C Oil Company, LLC only | Braman (8300) | Refugio | 1 | 24.2K | 1.35M | Jun 2018 – Mar 2024 |
| Mary Claire Bauer et Vir O-2-10664 | Hilcorp Energy Company only | Tom Oconnor (6300) | Refugio | 1 | 23.4K | 26.6K | Sep 2013 – Apr 2016 |
| Lambert Gas Unit G-2-234183 | Hilcorp Energy Company only | Tom Oconnor (7930) | Refugio | 1 | 18.2K | 887K | Jan 2008 – Feb 2009 |
| O'Brien, J. M. "E" G-2-231786 | Greta Operating Company LLC only | Greta, W. (6300) | Refugio | 1 | 14.5K | 568K | Jun 2007 – Apr 2026 |
| Scanio / Shelton G-2-223050 | High Plains Gas Systems, Inc. only | Mission River (8300 Vksbg) | Refugio | 1 | 13.7K | 874K | Mar 2006 – Nov 2010 |
| Heard, F.V.W. "B" O-2-7982 | CTR Petroleum, Inc. only | Refugio Heard (6300) | Refugio | 1 | 13.1K | 83K | Aug 1994 – May 2003 |
| Marberry, M. M. -C- O-2-5497 | Crimson Exploration Oper., Inc. only | McFaddin (5300) | Refugio | 1 | 12.1K | 15.2K | Jan 1993 – Nov 1995 |
| Kentucky-Fagan O-2-8547 | Anderson Oil Ltd. only | McFaddin (5300) | Refugio | 1 | 11.7K | 14.7K | Jun 2000 – Aug 2001 |
| Heard, Mrs. Fannie V. W. G-2-180992 | Hilcorp Energy Company only | Tom Oconnor (5300, East) | Refugio | 1 | 10.4K | 2.31M | Dec 2000 – May 2004 |
| Lambert Gas Unit G-2-234216 | Hilcorp Energy Company only | Tom Oconnor (7930) | Refugio | 1 | 10K | 484K | Feb 2008 – Oct 2008 |
| Braman -A- O-2-11356 | T-C Oil Company, LLC only | Braman (8300) | Refugio | 1 | 9.12K | 248K | Jun 2017 – May 2018 |
| Lambert, M.F. O-2-12684 | Hilcorp Energy Company only | Tom O'Connor (5730, East) | Refugio | 1 | 8.69K | 17.2K | Apr 2023 – Apr 2026 |
| O'Connor, Thomas "B" G-2-143511 | Quintana Pet. Corp. only | Mary Ellen O'Connor (8300) | Refugio | 1 | 8.42K | 108K | Jan 1993 – Jul 1993 |
| O'Connor, Martin -D- O-2-9013 | T - C Oil Company only | Lower River Pasture (6300) | Refugio | 1 | 8.32K | 100K | Oct 2005 – Sep 2006 |
| M. F. Lambert O-2-9323 | Hilcorp Energy Company only | Tom Oconnor (5300, East) | Refugio | 4 | 8.24K | 10.8K | May 2009 – Mar 2019 |
| Shelton O-2-10228 | Kebo Oil & Gas, Inc. only | Lake Pasture (FT-730) | Refugio | 1 | 7.3K | 8.02K | Mar 2012 – Sep 2015 |
| O'Connor, Thomas "B" O-2-7897 | Quintana Pet. Corp. only | Mary Ellen O'Connor (8300) | Refugio | 1 | 7.24K | 135K | Aug 1993 – May 1995 |
| O'Connor -H- O-2-13186 | T-C Oil Company, LLC only | Anaqua (3000) | Refugio | 1 | 7.23K | 2.34K | Dec 2025 – Apr 2026 |
| Reilly, Annie et Vir G-2-180969 | Hilcorp Energy Company only | Tom Oconnor (5300, East) | Refugio | 1 | 6.4K | 1.26M | Dec 2000 – Mar 2001 |
| Williams, Maude et al 'A' O-2-8521 | Quintana Pet. Corp. only | Tom O'Connor (5730, East) | Refugio | 11 | 6.26K | 13.4K | Mar 2000 – Aug 2000 |
| Scanio-Shelton G-2-205677 | Acock/Anaqua Operating Co., LP only | Mission River (6300) | Refugio | 1 | 6.07K | 245K | Nov 2004 – Feb 2015 |
| Heard, Mrs. Fannie V. W. G-2-180968 | Hilcorp Energy Company only | Tom Oconnor (5300, East) | Refugio | 1 | 5.45K | 1.37M | Dec 2000 – Jan 2005 |
| O'Connor O-2-12504 | T-C Oil Company, LLC only | Huff (5300) | Refugio | 1 | 5.34K | 6.49K | Oct 2022 – Sep 2024 |
| Scanio-Shelton O-2-11261 | Paloma Operating, LLC only | Mission River (6300) | Refugio | 1 | 5.08K | 0 | Apr 2015 – Jul 2023 |
| O'Connor O-2-8960 | T - C Oil Company only | Huff (5300) | Refugio | 1 | 5.03K | 33.1K | Apr 2005 – Jul 2006 |
| Heard, Mrs. Fannie V. W. G-2-180967 | Hilcorp Energy Company only | Tom Oconnor (5300, East) | Refugio | 1 | 4.66K | 1.3M | Dec 2000 – Jan 2005 |
| Meoc-Mellon-State Unit O-2-12591 | T-C Oil Company, LLC only | Mary Ellen O'Connor (8300) | Refugio | 1 | 4.51K | 9.46K | Mar 2023 – Apr 2023 |
| Braman -F- G-2-292069 | T-C Oil Company, LLC only | Braman (8300) | Refugio | 1 | 4.41K | 62.8K | Jan 2022 – Jul 2022 |
| Collins Estate O-2-6941 | Pat's P & a, Inc. only | Bonnie View, South (8030) | Refugio | 1 | 4.31K | 3.6K | Jan 1993 – Mar 1995 |
| Heard, F. V. W. -B- G-2-92454 | CTR Petroleum, Inc. only | Refugio Heard (6300) | Refugio | 1 | 4.03K | 47.8K | Jan 1993 – Jul 1994 |
| Scanio/Shelton G-2-205433 | High Plains Gas Systems, Inc. only | Mission River (6300) | Refugio | 1 | 3.91K | 135K | Aug 2004 – Oct 2006 |
| Williams, Maude et al "C" O-2-8549 | Quintana Pet. Corp. only | Tom O'Connor (5730, East) | Refugio | 2 | 3.79K | 4.04K | Feb 2000 – Aug 2000 |
| Mary Claire Bauer et Vir O-2-11288 | Hilcorp Energy Company only | Tom Oconnor (6300) | Refugio | 1 | 3.76K | 3.47K | Oct 2016 – Jul 2020 |
| Vidauri "F" G-2-245908 | Charro Operating, L.L.C. only | Greta, North (6300 Frio) | Refugio | 1 | 3.53K | 365K | Jan 2009 – Oct 2012 |
| Rooke O-2-9082 | Republic Resources, LLC. only | Rooke (Frio 7300) | Refugio | 1 | 3.36K | 114K | Oct 2006 – Jun 2007 |