| Scanio/Shelton O-2-9524 | High Plains Gas Systems, Inc. only | Mission River (5300) | Refugio | 1 | 257 | 0 | Sep 2013 – Aug 2014 |
| Churchill Unit G-2-146754 | CTR Petroleum, Inc. only | La Rosa, North (5800) | Refugio | 1 | 255 | 17.6K | Sep 1993 – Aug 1994 |
| Rooke, B. D. O-2-2365 | Laroco LLP only | La Rosa (5900 Sand) | Refugio | 11 | 251 | 1.17K | Apr 1994 – Sep 1994 |
| Rooke G-2-288967 | San Isidro Development Co, L. C. only | Refugio New (5190) | Refugio | 1 | 248 | 103K | Nov 2019 – Jul 2021 |
| Shelton, F. B. G-2-104870 | Lundberg Operating Corporation only | Mission River (6200) | Refugio | 1 | 247 | 62.3K | Jan 1993 – Dec 1994 |
| Rooke, F. B. 4 G-2-201739 | C & E Operating, Inc. only | Woodsboro, West (6900) | Refugio | 1 | 247 | 75.1K | Feb 2003 – Jul 2004 |
| Vincent G-2-245480 | T-C Oil Company, LLC only | Tejas (Frio 5400) | Refugio | 1 | 247 | 170K | Jan 2009 – Oct 2011 |
| Welder "H" G-2-164448 | Wiser Oil Company, The only | Phil Power (5050 Frio) | Refugio | 1 | 244 | 314K | Aug 1997 – Mar 1999 |
| Heard, Clement G-2-182090 | Hilcorp Energy Company only | Tom Oconnor (5300, East) | Refugio | 1 | 242 | 158K | Feb 2001 – Jan 2004 |
| Shelton G-2-252950 | Kebo Oil & Gas, Inc. only | Lake Pasture (E-264) | Refugio | 1 | 240 | 475K | Aug 2009 – Mar 2014 |
| Allison, Guy G-2-171518 | C & E Operating, Inc. only | Peponi Ranch (Frio 4800) | Refugio | 1 | 240 | 190K | Dec 1998 – Mar 2000 |
| Lake Pasture (FS-550 Sd.fld.unit G-2-75317 | Quintana Pet. Corp. only | Lake Pasture (FS-550) | Refugio | 1 | 239 | 248K | Jan 1993 – Sep 1993 |
| Welder-Terrell G-2-205471 | C & E Operating, Inc. only | Devil's Run (5250) | Refugio | 1 | 239 | 61.7K | Dec 2004 – Mar 2006 |
| Roche, K. D. "A" G-2-177895 | Kovar Operating, LLC only | Roche (6400) | Refugio | 1 | 235 | 211K | Apr 2000 – May 2018 |
| Williams, Maude et al "A" G-2-213674 | Hilcorp Energy Company only | Lake Pasture (FT-750) | Refugio | 1 | 233 | 34.1K | Sep 2005 – Apr 2006 |
| La Rosa Unit G-2-162114 | Rising Star Energy Partners II, only | La Rosa (6750, Above, Gas) | Refugio | 1 | 230 | 133K | Jan 1997 – Dec 1998 |
| Martin O'Connor-B- G-2-230738 | T - C Oil Company only | Lower River Pasture (8100) | Refugio | 1 | 223 | 6.2K | Aug 2007 – Nov 2007 |
| FVW Heard G-2-207785 | Greta Operating Company LLC only | Greta (F-3 West) | Refugio | 1 | 223 | 160K | Oct 2004 – Jun 2019 |
| Thelma Heard G-2-245450 | Kebo Oil & Gas, Inc. only | Lake Pasture, West (5900) | Refugio | 1 | 222 | 119K | Feb 2009 – Mar 2011 |
| Mary F. Lambert "EA" G-2-254174 | Hilcorp Energy Company only | Tom O'Connor (5350 Sand) | Refugio | 1 | 214 | 46.1K | Oct 2009 – Apr 2015 |
| Shelton O-2-9437 | Hilcorp Energy Company only | Hynes Ranch (5800 Sand) | Refugio | 1 | 213 | 9.4K | May 2010 – Oct 2010 |
| O'Connor, Thomas G-2-203530 | Cambrian Management, Ltd. only | Greta, Deep (5660) | Refugio | 1 | 207 | 85.7K | Jun 2004 – Oct 2007 |
| Oconnor, Mary Ellen G-2-51007 | Dolphin Petroleum, LP only | Mary Ellen Oconnor (Stray A) | Refugio | 1 | 205 | 88.5K | Apr 1994 – Aug 2004 |
| Scanio/ Shelton G-2-254386 | High Plains Gas Systems, Inc. only | Mission River (8200) | Refugio | 1 | 202 | 17K | Aug 2007 – Feb 2008 |
| Miguelita Scanio G-2-284790 | Digital Operating Company LLC only | Refugio-Fox (3300) | Refugio | 1 | 194 | 57.5K | Sep 2016 – Aug 2022 |
| Kentucky-Fagan O-2-8693 | Anderson Oil Ltd. only | Fagan, SW. (5200) | Refugio | 1 | 190 | 1.64K | Jan 2002 – Apr 2002 |
| Lambert, M.F. G-2-162261 | Devon Energy Production Co, L.P. only | Siene Bean (5150) | Refugio | 1 | 189 | 201K | Dec 1996 – Mar 1999 |
| Heard Heirs G-2-234231 | Aurora Resources Corporation only | Peponi Ranch (Frio 4800) | Refugio | 1 | 188 | 354K | Jul 2007 – Feb 2011 |
| Heard, Ira 'A' G-2-162762 | Quintana Pet. Corp. only | Tom Oconnor (6775) | Refugio | 1 | 184 | 6.76K | Jan 1997 – Feb 1997 |
| Williams, Maude et al "B" O-2-8170 | Hilcorp Energy Company only | Tom Oconnor (5500 Sand) | Refugio | 1 | 182 | 1.01K | May 1996 – Sep 1997 |
| Lambert, M. F. G-2-146091 | Hilcorp Energy Company only | Refugio-Fox (2600) | Refugio | 1 | 178 | 659K | Jul 1993 – Nov 1999 |
| Wood River Ranch 'B' G-2-286621 | Kebo Oil & Gas, Inc. only | Woodsboro (6200) | Refugio | 1 | 175 | 145K | Oct 2018 – Apr 2026 |
| Welder, J. F. Heirs-R G-2-63581 | Valence Operating Company only | Vidauri, West (4500) | Refugio | 1 | 174 | 1.03M | Jan 1993 – May 2010 |
| Welder "C" G-2-220243 | Hilcorp Energy Company only | Vidauri, SW. (5100) | Refugio | 1 | 174 | 44.7K | Jun 2005 – Jul 2013 |
| Fox, W. J. G-2-3898 | Anderson Oil Ltd. only | Refugio-Fox (5000) | Refugio | 1 | 171 | 310K | Jan 1993 – Aug 2012 |
| Barber G-2-135295 | JTB Oil Company, Inc. only | Blanco Creek (Frio 4700-Carter) | Refugio | 1 | 171 | 251K | Jan 1993 – Feb 2004 |
| Welder "B" G-2-160760 | Remora Operating, LLC only | Vidauri (2760) | Refugio | 1 | 164 | 542K | Oct 1996 – Jan 2019 |
| Miguelita Scanio O-2-11869 | Acock/Anaqua Operating Co., LP only | Refugio-Fox (5420) | Refugio | 1 | 163 | 3.26K | May 2019 – Aug 2019 |
| Wilson Heard "A" O-2-10020 | Hilcorp Energy Company only | Greta (3500) | Refugio | 1 | 162 | 0 | Jan 2012 – Jul 2012 |
| Rooke, F. B. 7 G-2-197340 | C & E Operating, Inc. only | Roche, NE (Frio 6700) | Refugio | 1 | 162 | 40.9K | Feb 2003 – Jun 2005 |
| O'Brien, J. M. G-2-193265 | Greta Operating Company LLC only | Greta (O-3) | Refugio | 1 | 159 | 80.3K | Feb 2003 – Dec 2016 |
| O'Connor, Thomas "C" O-2-8001 | Quintana Pet. Corp. only | Tom Oconnor (5450 Sand) | Refugio | 1 | 153 | 3.52K | Sep 1994 – May 1995 |
| Lambert G-2-143513 | Bagnall & Barber, Inc. only | Refugio-Fox (6600) | Refugio | 1 | 150 | 788 | Jan 1993 – Feb 1993 |
| Roche O-2-12818 | Paloma Operating, LLC only | Roche (-C-) | Refugio | 1 | 147 | 0 | Feb 2024 – Apr 2024 |
| WLP G-2-180383 | T-C Oil Company, LLC only | Lake Pasture (H-434) | Refugio | 1 | 146 | 34K | Dec 2000 – Jun 2001 |
| Huff Oil Unit 2 G-2-220993 | Remora Management, LLC only | Huff (2200) | Refugio | 1 | 145 | 6.11K | Oct 2005 – Feb 2006 |
| Welder "D" G-2-161847 | Wiser Oil Company, The only | Phil Power (5100) | Refugio | 1 | 144 | 225K | Nov 1996 – Jul 1997 |
| Williams, Maude et al -A- O-2-9170 | Hilcorp Energy Company only | Tom Oconnor (5425 Sand) | Refugio | 2 | 143 | 2.51K | Oct 2007 – Jul 2008 |
| Baptist O-2-8397 | Dale Operating Company only | Blanco Creek (5790) | Refugio | 1 | 143 | 0 | Sep 1998 – Sep 1998 |
| Churchill Unit G-2-151010 | CTR Petroleum, Inc. only | La Rosa (6750, Above, Gas) | Refugio | 1 | 142 | 13.9K | Aug 1994 – Jul 1995 |