| Meoc-Mellon-State Unit G-2-295806 | T-C Oil Company, LLC only | Mary Ellen O'Connor (8300) | Refugio | 1 | 65.2K | 169K | May 2023 – Aug 2026 |
| Meoc-Mellon-State Unit G-2-292773 | T-C Oil Company, LLC only | Mary Ellen OCONNOR(8100) | Refugio | 1 | 24.6K | 1.29M | Feb 2022 – Oct 2025 |
| Baumgartner -A- G-2-275006 | T-C Oil Company, LLC only | Dudley Campbell (Frio 6200) | Refugio | 1 | 23.9K | 91.5K | Sep 2014 – May 2017 |
| Welder-Terrell G-2-230170 | C & E Operating, Inc. only | Devils Run (Chamberlain 3A) | Refugio | 1 | 17.4K | 917K | May 2007 – Mar 2016 |
| Meoc-Mellon-State Unit G-2-300938 | T-C Oil Company, LLC only | Mary Ellen O'Connor (7750) | Refugio | 1 | 11.9K | 285K | Nov 2025 – Aug 2026 |
| O'Connor, Thomas "B" G-2-143511 | Quintana Pet. Corp. only | Mary Ellen O'Connor (8300) | Refugio | 1 | 8.42K | 108K | by Jan 1993 – Jul 1993 |
| Meoc-Mellon-State Unit G-2-297464 | T-C Oil Company, LLC only | Mary Ellen OCONNOR(8100) | Refugio | 1 | 7.53K | 439K | Jun 2024 – Aug 2026 |
| Welder-Terrell G-2-194134 | C & E Operating, Inc. only | Devil's Run (6600) | Refugio | 1 | 6.01K | 48.8K | Nov 2002 – Nov 2003 |
| O'Connor, Thomas "B" G-2-144285 | Quintana Pet. Corp. only | Mary Ellen Oconnor (Frio 6500) | Refugio | 1 | 5.6K | 175K | by Jan 1993 – Oct 1993 |
| Kelly, D. M. G-2-63176 | Acock/Anaqua Operating Co., LP only | Refugio Old (4800) | Refugio | 1 | 3.28K | 154K | Oct 1995 – Aug 2008 |
| Roche G-2-182267 | Seguro Well Service, Inc. only | Cactus (Sinton) | Refugio | 1 | 2.81K | 532K | Feb 2000 – Feb 2002 |
| Roche G-2-185229 | Seguro Well Service, Inc. only | Kathleen (Frio B) | Refugio | 1 | 2.79K | 441K | Jun 2001 – Jan 2004 |
| Baptist G-2-170204 | Bellows, Dewey Oper. Co., Ltd. only | Blanco Creek (6620) | Refugio | 1 | 2.67K | 343K | Jul 1998 – Jan 2002 |
| O'Connor, Lawrence W. G-2-263094 | O'Connor Energy Management, LLC only | Mary Ellen Oconnor (FS-1) | Refugio | 1 | 2.47K | 4.08K | May 2011 – Dec 2015 |
| O'Connor, Mary Ellen G-2-147980 | Emerald Oil & Gas LC only | Mary Ellen Oconnor (5500) | Refugio | 1 | 1.96K | 21.1K | Oct 1993 – Jan 1994 |
| Welder-Terrell G-2-194137 | C & E Operating, Inc. only | Devil's Run (5250) | Refugio | 1 | 1.42K | 403K | Jan 2003 – Aug 2004 |
| O'Connor, Thomas 'B' G-2-165954 | Hilcorp Energy Company only | Mary Ellen Oconnor (7900) | Refugio | 1 | 1.29K | 45.3K | Oct 1997 – Apr 1999 |
| Welder-Terrell G-2-204466 | C & E Operating, Inc. only | Devil's Run (5250) | Refugio | 1 | 935 | 261K | Aug 2003 – Jan 2005 |
| Roche G-2-182263 | Wiser Oil Company, The only | Cranell, W. (Frio Massive) | Refugio | 1 | 833 | 236K | Feb 2000 – Feb 2001 |
| O'Connor, Thomas 'B' G-2-166958 | Hilcorp Energy Company only | Mary Ellen Oconnor (H- 50) | Refugio | 1 | 389 | 254K | Nov 1997 – Mar 2018 |
| Zarsky G-2-115587 | Marwell Petroleum, Inc. only | Rooke Ranch (5050) | Refugio | 1 | 277 | 357K | by Jan 1993 – Sep 2000 |
| Welder-Terrell G-2-205471 | C & E Operating, Inc. only | Devil's Run (5250) | Refugio | 1 | 239 | 61.7K | Dec 2004 – Mar 2006 |
| Oconnor, Mary Ellen G-2-51007 | Dolphin Petroleum, LP only | Mary Ellen Oconnor (Stray A) | Refugio | 1 | 205 | 88.5K | Apr 1994 – Aug 2004 |
| O'Connor, Thomas 'B' G-2-179411 | Hilcorp Energy Company only | Mary Ellen Oconnor (FT-5) | Refugio | 1 | 78 | 113K | Aug 2000 – Dec 2009 |
| Shay, Mary A. G-2-148469 | Mueller Engineering Corp. only | Phil Power (5050 Frio) | Refugio | 1 | 62 | 20.9K | Jan 1994 – Jul 1994 |
| Shay, Mary Agnes Power G-2-46196 | Marwell Petroleum, Inc. only | Phil Power (5100) | Refugio | 1 | 27 | 52.8K | by Jan 1993 – Feb 1997 |
| Shelton, J. Isabella -D- G-2-187985 | High Plains Gas Systems, Inc. only | Mission River (6100) | Refugio | 1 | 20 | 12.1K | Jul 2001 – Feb 2008 |
| Shay, Mary A. G-2-102083 | Marwell Petroleum, Inc. only | Phil Power (5000) | Refugio | 1 | 0 | 9.1K | by Jan 1993 – Aug 1994 |
| Oconnor, Mary Ellen G-2-79074 | Dolphin Petroleum, LP only | Mary Ellen Oconnor (D-1) | Refugio | 1 | 0 | 7.07K | Feb 2011 – Jul 2016 |
| Mitchell, John N. G-2-35327 | Beckham Resources, Inc. only | Mission River (8400) | Refugio | 1 | 0 | 2.26K | Mar 1993 – Aug 2001 |
| Oconnor, Thomas -B- G-2-76189 | Quintana Pet. Corp. only | Mary Ellen Oconnor (FQ-25) | Refugio | 1 | 0 | 0 | — |
| Oconnor, Lawrence W. Estate Of G-2-65212 | Pace Oil and Gas Company only | Mary Ellen Oconnor (H- 12) | Refugio | 1 | 0 | 0 | — |
| Mitchell, John N. G-2-31072 | High Plains Gas Systems, Inc. only | Mission River (6300) | Refugio | 1 | 0 | 0 | — |
| Mitchell -B- G-2-3421 | Snowden, H. W. only | Mission River (6300) | Refugio | 1 | 0 | 0 | — |
| St. John -A- G-2-59983 | M. E. Operating only | Mary Ellen Oconnor (4175) | Refugio | 1 | 0 | 0 | — |
| Ryals, Shelly G-2-3953 | Wyrick & Hughes only | Refugio Old (3400) | Refugio | 1 | 0 | 0 | — |
| Shelton, J. Isabella G-2-59027 | Paloma Operating, LLC only | Mission River (5800) | Refugio | 1 | 0 | 210K | by Jan 1993 – Jun 2001 |
| Oconnor, Thomas -B- G-2-57488 | Quintana Pet. Corp. only | Mary Ellen Oconnor (FS-1) | Refugio | 1 | 0 | 0 | — |
| Ryals, Shelly G-2-3947 | Wyrick & Hughes only | Refugio Old (2000) | Refugio | 1 | 0 | 0 | — |
| Mitchell -D- G-2-3417 | Snowden, H. W. only | Mission River (6100) | Refugio | 1 | 0 | 0 | — |
| Oconnor, L. W. G-2-2990 | O'Connor Energy Management, LLC only | Mary Ellen Oconnor (FS-1) | Refugio | 1 | 0 | 162K | by Jan 1993 – Apr 1999 |
| Vincent G-2-137344 | M. J. G., Inc. only | Willow Lake (Stillwell 6260) | Refugio | 1 | 0 | 0 | — |
| Shay, Mary A. G-2-57012 | Marwell Petroleum, Inc. only | Phil Power (5000) | Refugio | 1 | 0 | 45.8K | by Jan 1993 – Mar 1998 |
| Ryals, Shelly G-2-135011 | Laquey, E. C. only | Refugio Heard (Area) | Refugio | 1 | 0 | 0 | — |
| O'Conner, Thomas "B" G-2-134993 | Quintana Pet. Corp. only | Mary Ellen Oconnor (FQ-25) | Refugio | 1 | 0 | 0 | — |
| O'Connor, L. W. G-2-137359 | Emerald Oil & Gas LC only | Mary Ellen Oconnor (FS-75) | Refugio | 1 | 0 | 67.2K | by Jan 1993 – Feb 1994 |
| O'Connor, L. W. G-2-140029 | Dewbre Petroleum Corporation only | Mary Ellen Oconnor (5000) | Refugio | 1 | 0 | 127K | by Jan 1993 – Nov 1994 |
| O'Connor, L. W. G-2-142049 | Emerald Oil & Gas LC only | Mary Ellen O'Connor (FS-20) | Refugio | 1 | 0 | 521K | by Jan 1993 – Feb 2011 |
| Shay, Mary A. G-2-57011 | Marwell Petroleum, Inc. only | Phil Power (4400) | Refugio | 1 | 0 | 0 | — |
| Shelly G-2-3938 | Omelveny, J. M., Prod. Co. only | Refugio Old | Refugio | 1 | 0 | 0 | — |