| Heard, Fannie V. W., Mrs. O-2-2586 | Hilcorp Energy Company only | Tom Oconnor (5500 Sand) | Refugio | 60 | 2.28M | 1.64M | by Jan 1993 – Apr 2026 |
| Oconnor, Thomas, -C- O-2-2587 | Hilcorp Energy Company only | Tom Oconnor (5500 Sand) | Refugio | 51 | 2.22M | 2.1M | by Jan 1993 – Apr 2026 |
| Heard, Fannie V. W., Mrs. O-2-2546 | Hilcorp Energy Company only | Tom Oconnor (4500 Greta Mass.) | Refugio | 46 | 2.17M | 929K | by Jan 1993 – Apr 2026 |
| Heard, Clement O-2-2585 | Hilcorp Energy Company only | Tom Oconnor (5500 Sand) | Refugio | 20 | 1.34M | 986K | by Jan 1993 – Apr 2026 |
| Reilly, Annie, et Vir O-2-2588 | Hilcorp Energy Company only | Tom Oconnor (5500 Sand) | Refugio | 15 | 1.07M | 997K | by Jan 1993 – Apr 2026 |
| Oconnor, Thomas, -C- O-2-2566 | Hilcorp Energy Company only | Tom Oconnor (4500 Greta Mass.) | Refugio | 18 | 646K | 278K | by Jan 1993 – Apr 2026 |
| Heard, Clement O-2-2523 | Hilcorp Energy Company only | Tom Oconnor (4500 Greta Mass.) | Refugio | 16 | 539K | 277K | by Jan 1993 – Apr 2026 |
| Tom O'Connor (4150 Ft. Sd.) Unit O-2-8874 | Hilcorp Energy Company only | Tom O'Connor (4150) | Refugio | 68 | 512K | 461K | Jun 2004 – Jul 2025 |
| BP O-2-8324 | Gilster, Ralph R. III only | Lake Pasture, West (4450) | Refugio | 26 | 485K | 839K | Nov 1997 – Dec 2000 |
| Lambert, M. F. O-2-2590 | Hilcorp Energy Company only | Tom Oconnor (5500 Sand) | Refugio | 39 | 446K | 1.58M | by Jan 1993 – Apr 2026 |
| Lambert, M.F. O-2-9384 | Hilcorp Energy Company only | Tom O'Connor (4650) | Refugio | 3 | 414K | 178K | Mar 2010 – Apr 2026 |
| O'Connor O-2-7505 | T-C Oil Company, LLC only | Huff (5000) | Refugio | 8 | 366K | 452K | by Jan 1993 – Apr 2026 |
| Williams, Maude, Etal, -A- O-2-2589 | Hilcorp Energy Company only | Tom Oconnor (5500 Sand) | Refugio | 9 | 323K | 573K | by Jan 1993 – Apr 2025 |
| Williams, Maude, et al -A- O-2-2906 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 15 | 314K | 643K | by Jan 1993 – Mar 2026 |
| Bauer, Mary Claire, et Vir O-2-2583 | Hilcorp Energy Company only | Tom Oconnor (5500 Sand) | Refugio | 13 | 274K | 419K | by Jan 1993 – Dec 2023 |
| Lambert, M. F. O-2-2581 | Hilcorp Energy Company only | Tom Oconnor (5500 Sand) | Refugio | 6 | 241K | 367K | by Jan 1993 – May 2019 |
| Oconnor, Thomas -A- O-2-4927 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 12 | 238K | 685K | by Jan 1993 – Sep 2023 |
| Heard, Claude E., Etal O-2-2584 | Hilcorp Energy Company only | Tom Oconnor (5500 Sand) | Refugio | 7 | 196K | 433K | by Jan 1993 – Mar 2011 |
| Lambert , M. F. O-2-6256 | Hilcorp Energy Company only | Tom O'Connor (4150) | Refugio | 10 | 193K | 157K | by Jan 1993 – Jul 2019 |
| O'Conner, Thomas -C- O-2-6234 | Hilcorp Energy Company only | Tom O'Connor (4150) | Refugio | 10 | 186K | 393K | by Jan 1993 – May 2004 |
| Maude Williams et al 'A' O-2-11339 | Hilcorp Energy Company only | Lake Pasture (FS-503) | Refugio | 2 | 183K | 400K | Mar 2017 – Apr 2026 |
| Scanio, Miguelita G-2-233636 | Digital Operating Company LLC only | Refugio-Fox (6750) | Refugio | 1 | 180K | 552K | Mar 2007 – Feb 2022 |
| Lambert, M. F. O-2-4958 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 7 | 166K | 421K | by Jan 1993 – May 2025 |
| Lambert, M. F., -A- O-2-4004 | Hilcorp Energy Company only | Greta (3500) | Refugio | 1 | 156K | 374K | by Jan 1993 – Oct 2016 |
| Oconner, M. E. O-2-6867 | T-C Oil Company, LLC only | Refugio Old (5500) | Refugio | 1 | 155K | 204K | by Jan 1993 – Jan 2022 |
| Reilly, Annie, et Vir O-2-2592 | Hilcorp Energy Company only | Tom Oconnor (4500 Greta Mass.) | Refugio | 5 | 153K | 144K | by Jan 1993 – Oct 2023 |
| Oconnor, Thomas, -A- O-2-2627 | Hilcorp Energy Company only | Tom Oconnor (5500 Sand) | Refugio | 9 | 151K | 150K | by Jan 1993 – Jan 2022 |
| Welder "C" O-2-8852 | Hilcorp Energy Company only | Phil Power (5000) | Refugio | 1 | 147K | 218K | May 2002 – Jan 2015 |
| O'Connor, Dennis O-2-3014 | T - C Oil Company only | Lake Pasture, West (4450) | Refugio | 8 | 133K | 1.78M | by Jan 1993 – Dec 2000 |
| O'Connor, Dennis et al -N- O-2-8931 | T-C Oil Company, LLC only | Huff (2950 Sand) | Refugio | 1 | 122K | 128K | Nov 2004 – Apr 2026 |
| Lambert, M.F. O-2-6088 | Hilcorp Energy Company only | Tom O'Connor (4150) | Refugio | 14 | 120K | 314K | by Jan 1993 – Aug 2018 |
| O'Conner, -E- O-2-6466 | T-C Oil Company, LLC only | Huff (2950 Sand) | Refugio | 2 | 118K | 204K | by Jan 1993 – Jun 2011 |
| Lambert, M. F. O-2-9033 | Hilcorp Energy Company only | Tom Oconnor (7750) | Refugio | 1 | 117K | 299K | Jan 2006 – Jan 2010 |
| Welder 'C' G-2-234179 | Hilcorp Energy Company only | Sharps Lake, N. (5040) | Refugio | 1 | 113K | 310K | Jan 2008 – May 2015 |
| O'Conner -H- O-2-7095 | T-C Oil Company, LLC only | Huff (3500) | Refugio | 1 | 106K | 197K | by Jan 1993 – Nov 2011 |
| Heard, Clement O-2-4791 | Hilcorp Energy Company only | Tom Oconnor (7500) | Refugio | 4 | 105K | 332K | by Jan 1993 – Oct 2009 |
| Heard Fannie V.W. Mrs O-2-6800 | Hilcorp Energy Company only | Tom O'Connor (4150) | Refugio | 7 | 101K | 892K | by Jan 1993 – May 2004 |
| Scanio, Miguelita O-2-8611 | Digital Operating Company LLC only | Refugio-Fox (6500) | Refugio | 1 | 101K | 199K | Apr 2001 – Oct 2019 |
| O'Connor, Dennis et al "G" O-2-8384 | T - C Oil Company only | Lake Pasture, West (4500) | Refugio | 1 | 99.1K | 55.1K | Jun 1998 – Oct 2008 |
| Fagan O-2-7924 | Allegiant Resources, LLC only | McFaddin (4500) | Refugio | 6 | 97.3K | 85.7K | Oct 1993 – Sep 2017 |
| Copano Gas Unit O-2-7946 | T - C Oil Company only | Tom Oconnor (5250) | Refugio | 3 | 94.7K | 231K | Feb 1994 – Jan 2001 |
| Miguelita Scanio O-2-9060 | Acock/Anaqua Operating Co., LP only | Refugio-Fox (6750) | Refugio | 2 | 89.3K | 142K | Jun 2006 – Oct 2012 |
| Lambert, M.F. O-2-6619 | Hilcorp Energy Company only | Tom Oconnor (5250) | Refugio | 5 | 85.7K | 295K | by Jan 1993 – Nov 2023 |
| Heard, Claude E. et Al O-2-9330 | Hilcorp Energy Company only | Tom Oconnor, N. (5150) | Refugio | 3 | 83.3K | 21.8K | Jun 2009 – Apr 2026 |
| Lambert, M. F. O-2-4902 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 4 | 79.3K | 106K | by Jan 1993 – Mar 2020 |
| Shelton G-2-208006 | Neumin Production Company only | Refugio-Fox (5500) | Refugio | 1 | 78.4K | 144K | Dec 2004 – Oct 2009 |
| Reilly, Annie et Vir O-2-6938 | Hilcorp Energy Company only | Tom O'Connor (4150) | Refugio | 2 | 75K | 506K | by Jan 1993 – May 2004 |
| Miguelita Scanio O-2-9442 | Digital Operating Company LLC only | Tom Oconnor (6550) | Refugio | 1 | 74.3K | 51.3K | Jun 2010 – Dec 2022 |
| Williams, Maude Etal -B- O-2-5559 | Hilcorp Energy Company only | Tom Oconnor (5650' Sand) | Refugio | 8 | 73.5K | 156K | Jun 1993 – Jul 2015 |
| Clement Heard 42 O-2-11813 | Hilcorp Energy Company only | Tom Oconnor (4500 Greta Mass.) | Refugio | 1 | 69.1K | 7.93K | Aug 2019 – Apr 2026 |