| Williams, Maude, Etal, -A- O-2-2589 | Hilcorp Energy Company only | Tom Oconnor (5500 Sand) | Refugio | 9 | 323K | 573K | Jan 1993 – Jul 2026 |
| Lambert, M. F. O-2-1549 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 26 | 315K | 830K | Jan 1993 – Jul 2026 |
| Oconnor, Dennis, et al -N- O-2-3598 | T-C Oil Company, LLC only | Huff (372) | Refugio | 7 | 314K | 481K | Jan 1993 – Jul 2026 |
| Williams, Maude, et al -A- O-2-2906 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 15 | 314K | 643K | Jan 1993 – Jul 2026 |
| Heard, Fannie V.W. Mrs. O-2-7813 | Hilcorp Energy Company only | Tom Oconnor (5200, East) | Refugio | 17 | 312K | 705K | Jan 1993 – Jul 2026 |
| Heard, F. V. W. O-2-3994 | Greta Operating Company LLC only | Greta (4400) | Refugio | 3 | 310K | 160K | Jan 1993 – Jul 2026 |
| Schirmer "C-120" O-2-8216 | Bent Wing Energy, LLC only | Bonnie View (4700) | Refugio | 1 | 286K | 59.4K | Oct 1996 – Jul 2026 |
| Lambert, M. F. O-2-1527 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 17 | 278K | 330K | Jan 1993 – Jul 2026 |
| Bauer, Mary Claire, et Vir O-2-2583 | Hilcorp Energy Company only | Tom Oconnor (5500 Sand) | Refugio | 13 | 274K | 419K | Jan 1993 – Jul 2026 |
| Lambert, M.F. O-2-8906 | Hilcorp Energy Company only | Tom Oconnor (5200, East) | Refugio | 18 | 274K | 418K | Aug 2004 – Jul 2026 |
| Obrien, J. J., -B- O-2-3960 | Greta Operating Company LLC only | Greta (4400) | Refugio | 4 | 273K | 40.8K | Jan 1993 – Jul 2026 |
| O'Connor, Thomas "A" O-2-3662 | Hilcorp Energy Company only | Tom Oconnor (5400 Sand) | Refugio | 20 | 273K | 1.01M | Jan 1993 – Jul 2026 |
| O'Connor, Thomas -C- O-2-9135 | Hilcorp Energy Company only | Tom Oconnor (5200, East) | Refugio | 12 | 272K | 61.7K | Apr 2007 – Jul 2026 |
| Rooke. B.D. O-2-8019 | Rising Star Energy Partners II, only | La Rosa (Consolidated, Oil) | Refugio | 41 | 272K | 507K | Nov 1994 – Jul 2026 |
| Heard, F. V. W. O-2-8810 | Dorchester Operating Company LLC only | Greta (F-3 West) | Refugio | 2 | 262K | 207K | Jul 2003 – Jul 2026 |
| Williams, Maude et al "A" O-2-8842 | Hilcorp Energy Company only | Lake Pasture (FT-759) | Refugio | 3 | 255K | 432K | Mar 2004 – Dec 2018 |
| Willow Creek -B- O-2-9482 | T-C Oil Company, LLC only | Willow Creek (8000) | Refugio | 5 | 252K | 338K | Sep 2010 – Apr 2019 |
| Lambert, M. F. O-2-2581 | Hilcorp Energy Company only | Tom Oconnor (5500 Sand) | Refugio | 6 | 241K | 367K | Jan 1993 – Jan 2022 |
| Oconnor, Thomas -A- O-2-4927 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 12 | 238K | 685K | Jan 1993 – Jul 2026 |
| Clay Pasture -B- State Unit O-2-9332 | T-C Oil Company, LLC only | Anaqua (3100) | Refugio | 3 | 207K | 76.4K | Jul 2009 – Jul 2026 |
| Braman -D- O-2-11520 | T-C Oil Company, LLC only | Braman (8200) | Refugio | 1 | 206K | 293K | Mar 2018 – Jul 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 – Jul 2026 |
| Heard, Claude E., Etal O-2-2584 | Hilcorp Energy Company only | Tom Oconnor (5500 Sand) | Refugio | 7 | 196K | 433K | Jan 1993 – Jun 2015 |
| Clarkson, Edith O-2-1391 | Kovar Operating, LLC only | Refugio Old | Refugio | 2 | 196K | 175K | Jan 1993 – Nov 2016 |
| Lambert , M. F. O-2-6256 | Hilcorp Energy Company only | Tom O'Connor (4150) | Refugio | 10 | 193K | 157K | Jan 1993 – Aug 2021 |
| O'Connor, Mary Ellen O-2-7933 | O'Connor Energy Management, LLC only | Mary Ellen Oconnor (FS-75) | Refugio | 16 | 192K | 500K | Oct 1993 – Jul 2026 |
| O'Conner, Thomas -C- O-2-6234 | Hilcorp Energy Company only | Tom O'Connor (4150) | Refugio | 10 | 186K | 393K | Jan 1993 – Sep 2004 |
| Lambert, M. F. O-2-8556 | Hilcorp Energy Company only | Tom Oconnor (7940) | Refugio | 2 | 186K | 479K | Aug 2000 – Mar 2006 |
| Maude Williams et al 'A' O-2-11339 | Hilcorp Energy Company only | Lake Pasture (FS-503) | Refugio | 2 | 183K | 400K | Mar 2017 – Jul 2026 |
| Buck O-2-6495 | Christopher Oil & Gas Inc only | Bonnie View (4700) | Refugio | 1 | 182K | 31.5K | Jan 1993 – Apr 2012 |
| T-C Oil Co. -O'Connor O-2-7326 | T-C Oil Company, LLC only | Lake Pasture (FT-570) | Refugio | 1 | 177K | 745K | Jan 1993 – Jul 2017 |
| O'Conner, Mary Ellen O-2-6698 | Dolphin Petroleum, LP only | Mary Ellen Oconnor (FQ-30) | Refugio | 3 | 174K | 391K | Jan 1993 – Jul 2026 |
| Tract 72 O-2-7837 | Kebo Oil & Gas, Inc. only | Siene Bean (5770) | Refugio | 1 | 168K | 163K | Jan 1993 – Jul 2026 |
| Roche, K. D. -A- O-2-3466 | Kovar Operating, LLC only | Roche (-A-) | Refugio | 8 | 166K | 252K | Jan 1993 – Feb 2019 |
| Lambert, M. F. O-2-4958 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 7 | 166K | 421K | Jan 1993 – Jul 2026 |
| Heard, Claude E., et Al O-2-1539 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 12 | 163K | 369K | Jan 1993 – Jul 2026 |
| Williams, Maude, Etal -A- O-2-1548 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 25 | 160K | 372K | Jan 1993 – Jul 2026 |
| Schirmer, Henry O-2-8871 | Bent Wing Energy, LLC only | Bonnie View (5400) | Refugio | 2 | 158K | 139K | Jul 2004 – Jul 2026 |
| O'Connor, Dennis et al -A- O-2-8133 | T-C Oil Company, LLC only | Melon Ranch (5800) | Refugio | 1 | 157K | 201K | Dec 1995 – Jul 2026 |
| Oconner, M. E. O-2-6867 | T-C Oil Company, LLC only | Refugio Old (5500) | Refugio | 1 | 155K | 204K | Jan 1993 – Jul 2026 |
| Miguelita Scanio O-2-9317 | Digital Operating Company LLC only | Tom Oconnor (7200) | Refugio | 1 | 154K | 182K | Mar 2009 – Jul 2026 |
| Reilly, Annie, et Vir O-2-2592 | Hilcorp Energy Company only | Tom Oconnor (4500 Greta Mass.) | Refugio | 5 | 153K | 144K | Jan 1993 – Jul 2026 |
| Bauer, Mary Claire et Vir O-2-8808 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 5 | 152K | 230K | Jul 2003 – Jul 2026 |
| Oconnor, Thomas, -A- O-2-2627 | Hilcorp Energy Company only | Tom Oconnor (5500 Sand) | Refugio | 9 | 151K | 150K | Jan 1993 – Jul 2026 |
| Welder "C" O-2-8852 | Hilcorp Energy Company only | Phil Power (5000) | Refugio | 1 | 147K | 218K | May 2002 – Feb 2016 |
| Oconnor, Thos. O-2-3990 | Greta Operating Company LLC only | Greta (4400) | Refugio | 6 | 147K | 51.5K | Jan 1993 – Jul 2026 |
| Miguelita Scanio O-2-8991 | Digital Operating Company LLC only | Refugio-Fox (6400) | Refugio | 1 | 143K | 144K | Aug 2005 – Jul 2026 |
| Rooke O-2-11255 | San Isidro Development Co, L. C. only | Refugio New (6200 Stringer Sd.) | Refugio | 1 | 142K | 120K | May 2016 – Jul 2026 |
| Oconnor -H- O-2-2571 | T-C Oil Company, LLC only | Huff (372) | Refugio | 5 | 141K | 445K | Jan 1993 – Jul 2026 |
| Lambert, M. F. O-2-4001 | Hilcorp Energy Company only | Greta (4400) | Refugio | 12 | 139K | 211K | Jan 1993 – Jul 2026 |