| O'Connor, M V Est G-2-193246 | Cummins & Walker Oil Co., Inc. only | Hynes Ranch (5300) | Refugio | 1 | 141 | 295K | Feb 2003 – Mar 2005 |
| Heard, F. V. W. -B- O-2-1379 | CTR Petroleum, Inc. only | Refugio New | Refugio | 5 | 140 | 7.18K | Jan 1993 – Feb 1994 |
| Heard, Mrs. Fannie V. W. G-2-186369 | Hilcorp Energy Company only | Tom Oconnor (5300, East) | Refugio | 1 | 139 | 405K | Apr 2001 – Nov 2004 |
| O'Connor, Thomas -A- G-2-180991 | Hilcorp Energy Company only | Tom O'Connor (4925) | Refugio | 1 | 136 | 526K | Dec 2000 – Jul 2015 |
| Miguelita Scanio G-2-185226 | Paloma Operating, LLC only | Refugio-Fox (6220) | Refugio | 1 | 134 | 130K | May 2001 – Apr 2009 |
| Reilly, Annie et Vir O-2-7879 | Quintana Pet. Corp. only | Tom Oconnor (6550) | Refugio | 1 | 131 | 17K | Jun 1993 – Oct 1993 |
| Barber G-2-137030 | Core E & P Corp. only | Blanco Creek (Frio 4700-Carter) | Refugio | 1 | 129 | 18.2K | Jan 1993 – Jun 1994 |
| Williams, Maude et al -A- G-2-176646 | Hilcorp Energy Company only | Tom O'Connor (4910) | Refugio | 1 | 129 | 685K | Feb 2000 – Nov 2008 |
| Reilly, Annie et Vir G-2-244752 | Hilcorp Energy Company only | Tom Oconnor (3550) | Refugio | 1 | 128 | 21.2K | Dec 2008 – Jul 2013 |
| Lambert Gas Unit G-2-260633 | Hilcorp Energy Company only | Tom Oconnor (7930) | Refugio | 1 | 125 | 111K | Feb 2011 – Dec 2019 |
| Rooke, F. B. 4 G-2-209431 | C & E Operating, Inc. only | Woodsboro, West (Corr Sand) | Refugio | 1 | 124 | 71.5K | Jul 2000 – Jan 2004 |
| Vidauri "P" G-2-245524 | Charro Operating, L.L.C. only | Phil Power (5000) | Refugio | 1 | 122 | 112K | Apr 2009 – Dec 2011 |
| Roche G-2-251219 | Salida Exploration, LLC only | Roche (6000 Sand) | Refugio | 1 | 122 | 9.76K | Sep 2009 – Nov 2009 |
| Jowers, F. G-2-179376 | Cummins & Walker Oil Co., Inc. only | Agnes Barber S. (Frio 5250) | Refugio | 1 | 119 | 114K | Aug 2000 – Nov 2001 |
| Duke Ranch "F" G-2-237281 | T-C Oil Company, LLC only | Tejas (Frio 4450) | Refugio | 1 | 116 | 106K | Jun 2008 – Sep 2010 |
| Duke Ranch -L- G-2-212608 | T - C Oil Company only | Tejas (Frio 4450) | Refugio | 1 | 116 | 175K | Jul 2005 – Dec 2006 |
| Williams G-2-183251 | Neumin Production Company only | Bert Harry (Lower Sinton) | Refugio | 1 | 116 | 44.1K | Jan 2001 – Sep 2001 |
| Welder "B" G-2-160762 | Forest Oil Corporation only | Vidauri (2760) | Refugio | 1 | 115 | 523K | Sep 1996 – Aug 2005 |
| Risher-Brandon Unit G-2-143096 | Geiser, D. Allen only | Agnes Barber S. (Frio 5250) | Refugio | 1 | 114 | 34K | Jan 1993 – Jul 1993 |
| Thomas O'Connor "A" O-2-10014 | Hilcorp Energy Company only | Tom Oconnor (5250) | Refugio | 1 | 114 | 0 | Oct 2020 – Oct 2021 |
| Rooke O-2-3573 | Carter Exploration Company only | Mission River | Refugio | 1 | 113 | 175 | Feb 1993 – Mar 1993 |
| Duke Ranch "F" G-2-261263 | T-C Oil Company, LLC only | Tejas (Stray Sand) | Refugio | 1 | 111 | 358K | Jun 2011 – Oct 2025 |
| Welder Heirs Unit G-2-182105 | C & E Operating, Inc. only | Devils Run (6200) | Refugio | 1 | 109 | 176K | Feb 2001 – Jun 2002 |
| O' Connor, Thomas "C" G-2-144281 | Quintana Pet. Corp. only | Tom Oconnor (5450 Sand) | Refugio | 1 | 107 | 296K | Jan 1993 – May 1997 |
| Scanio/Shelton O-2-11295 | Paloma Operating, LLC only | Mission River | Refugio | 2 | 106 | 0 | May 2015 – May 2015 |
| Welder "B" G-2-163131 | Wiser Oil Company, The only | Vidauri (2760) | Refugio | 1 | 106 | 205K | May 1997 – Jun 2000 |
| Kentucky-Fagan G-2-186801 | Anderson Oil Ltd. only | Fagan, SW. (5200) | Refugio | 1 | 106 | 5.19K | Oct 2001 – Dec 2001 |
| Huff GU 1 G-2-50806 | Remora Management, LLC only | Huff (2800) | Refugio | 1 | 105 | 465 | May 2006 – Feb 2007 |
| O'Conner, Mary Ellen O-2-7277 | Dolphin Petroleum, LP only | Mary Ellen Oconnor (Stray 5400) | Refugio | 1 | 104 | 2.82K | Jan 2014 – Jun 2016 |
| M. F. Lambert 151 G-2-258066 | Hilcorp Energy Company only | Tom Oconnor (6280) | Refugio | 1 | 104 | 18.7K | Oct 2010 – Aug 2011 |
| Shelton, J. Isabella -D- O-2-1081 | Beckham Resources, Inc. only | Mission River | Refugio | 1 | 101 | 83 | Jan 1993 – Jun 2001 |
| Rooke, F. B. 4 G-2-178485 | C & E Operating, Inc. only | Woodsboro, West (Corr Sand) | Refugio | 1 | 101 | 202K | May 2000 – Apr 2003 |
| Niemann, Emil O-2-8943 | Mission River Systems, Inc. only | Bonnie View (5400) | Refugio | 1 | 100 | 0 | Oct 2004 – Mar 2005 |
| O'Connor, Thomas James O-2-8142 | Emerald Oil & Gas LC only | Mary Ellen Oconnor (FS-96) | Bee | 2 | 100 | 25 | Feb 1996 – Feb 1998 |
| Larosa Unit G-2-137173 | Rising Star Energy Partners II, only | La Rosa (6750, Above, Gas) | Refugio | 1 | 97 | 790K | Jan 1993 – Apr 2026 |
| Kentucky-Fagan G-2-176010 | Anderson Oil Ltd. only | McFaddin (5500) | Refugio | 1 | 95 | 20K | Nov 1999 – Jan 2000 |
| Fox, W. J. G-2-180672 | Cummins & Walker Oil Co., Inc. only | Refugio-Fox (3940) | Refugio | 1 | 93 | 60.9K | Aug 2000 – Jul 2001 |
| Lambert Gas Unit G-2-206528 | Hilcorp Energy Company only | Tom O'Connor (4925) | Refugio | 1 | 92 | 337K | Oct 2004 – Dec 2022 |
| Lambert, M. F. O-2-9029 | Hilcorp Energy Company only | Tom O'Connor (5600 Foot Sand) | Refugio | 1 | 92 | 1.41K | Feb 2006 – Aug 2006 |
| Welder 'G' G-2-166883 | Wiser Oil Company, The only | Vidauri (2760) | Refugio | 1 | 92 | 338K | Dec 1997 – Sep 2001 |
| Lambert Gas Unit G-2-279470 | Hilcorp Energy Company only | Tom O'Connor (4925) | Refugio | 1 | 89 | 1.24K | Jun 2018 – Sep 2018 |
| Williams, Maude et al "A" O-2-8824 | Hilcorp Energy Company only | Lake Pasture (FT-572) | Refugio | 1 | 86 | 198 | Sep 2003 – Sep 2003 |
| Thomson-Barrow Corp. C G-2-175656 | C & E Operating, Inc. only | Laura Thomson (5600) | Refugio | 1 | 86 | 164K | Oct 1999 – Feb 2007 |
| Huff GU 1 G-2-141410 | Remora Management, LLC only | McFaddin (2450) | Refugio | 1 | 85 | 80.5K | Jan 1993 – Jun 1997 |
| Obrien, J. J., -A- O-2-4022 | Chilton Energy only | Greta, Deep (5900) | Refugio | 2 | 85 | 3 | Sep 1993 – Nov 1993 |
| Lambert, M. F. "H" G-2-162431 | Pennzenergy Exp. & Prod., L.L.C. only | Refugio-Fox (2550) | Refugio | 1 | 82 | 288K | Nov 1996 – May 1998 |
| O'Brien-Harkins G-2-222635 | Cummins & Walker Oil Co., Inc. only | Refugio-Fox (1600) | Refugio | 1 | 82 | 52.6K | Sep 2006 – Jun 2010 |
| Welder "H" G-2-163870 | Wiser Oil Company, The only | Phil Power (5050 Frio) | Refugio | 1 | 82 | 69.2K | Jul 1997 – Feb 1999 |
| Fagan C G-2-270976 | Great Bay Operations, LLC only | McFaddin (5500) | Refugio | 1 | 81 | 5.8K | Aug 2013 – Aug 2013 |
| Wood River Ranch "D" G-2-257147 | Kebo Oil & Gas, Inc. only | Woodsboro (Frio 6300) | Refugio | 1 | 80 | 155K | Jun 2010 – Dec 2017 |