| Scanio, M "B" G-2-114263 | Acock/Anaqua Operating Co., LP only | Refugio-Fox (4900) | Refugio | 1 | 406 | 421K | Jan 1993 – Nov 2018 |
| O'Conner -D- O-2-5927 | T - C Oil Company only | Lake Pasture (FS-534) | Refugio | 1 | 405 | 9.82K | Jan 1993 – Nov 1993 |
| Scanio/Shelton G-2-234536 | High Plains Gas Systems, Inc. only | Mission River (4200) | Refugio | 1 | 404 | 2.02K | Jul 2006 – Mar 2008 |
| Vincent "A" G-2-173005 | Wiser Oil Company, The only | Vidauri, SW. (5100) | Refugio | 1 | 402 | 293K | Apr 1998 – Mar 2000 |
| O'Connor, Thomas "C" O-2-8605 | Hilcorp Energy Company only | Tom Oconnor (5250) | Refugio | 1 | 394 | 440 | Mar 2001 – Jan 2002 |
| O'Connor, Thomas -A- G-2-137686 | Hilcorp Energy Company only | Tom O'CONNOR(4900) | Refugio | 1 | 393 | 1.58M | Jan 1993 – Oct 2013 |
| O'Connor, Thomas 'B' G-2-166958 | Hilcorp Energy Company only | Mary Ellen Oconnor (H- 50) | Refugio | 1 | 389 | 254K | Nov 1997 – Mar 2018 |
| Wilson Heard "B" G-2-142075 | Hilcorp Energy Company only | Tom O'Connor (4910) | Refugio | 1 | 389 | 1.7M | Jan 1993 – May 2010 |
| Miguelita Scanio G-2-281284 | Digital Operating Company LLC only | Refugio Old (6300) | Refugio | 1 | 387 | 193K | Oct 2016 – Dec 2025 |
| Fagan G-2-272718 | Allegiant Resources, LLC only | McFaddin (5050) | Refugio | 1 | 386 | 26.8K | Jan 2014 – Aug 2014 |
| Twin Mott-A- G-2-226824 | T - C Oil Company only | TM Lake (6500) | Refugio | 1 | 378 | 19.1K | Mar 2007 – Apr 2007 |
| Lambert, M. F. O-2-4020 | Hilcorp Energy Company only | Greta, Deep (5800) | Refugio | 3 | 372 | 2.72K | Jun 2003 – Mar 2006 |
| Lambert Gas Unit G-2-267700 | Hilcorp Energy Company only | Tom Oconnor (7930) | Refugio | 1 | 372 | 22.9K | May 2012 – Sep 2012 |
| Scanio, Miguelita G-2-132936 | Acock/Anaqua Operating Co., LP only | Refugio-Fox (6300 A) | Refugio | 1 | 371 | 363K | Jan 1993 – Mar 2013 |
| Williams, Maude et al -C- O-2-9198 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 3 | 359 | 30 | Jan 2013 – Apr 2013 |
| Heard, Ira "A" G-2-142993 | Amoco Production Company only | Tom Oconnor (7500) | Refugio | 1 | 358 | 21.1K | Jan 1993 – Jul 1993 |
| Schirmer-Buck 'a' Unit G-2-285566 | Bent Wing Energy, LLC only | Bonnie View (5300) | Refugio | 1 | 357 | 50.3K | Oct 2018 – Feb 2022 |
| Heard, Claude E. et Al O-2-9134 | Hilcorp Energy Company only | Tom Oconnor (5425 Sand) | Refugio | 1 | 355 | 528 | Apr 2007 – Dec 2007 |
| Marberry B O-2-11042 | Allegiant Resources, LLC only | McFaddin (4500) | Refugio | 1 | 353 | 3.02K | Sep 2014 – Feb 2015 |
| Lambert, M. F. O-2-3698 | Hilcorp Energy Company only | Tom Oconnor (5400 Sand) | Refugio | 4 | 351 | 8.85K | Mar 2006 – Aug 2008 |
| Oconnor, Thomas -B- O-2-5333 | Quintana Pet. Corp. only | Woodsboro, South (4200) | Refugio | 4 | 350 | 243 | Jan 1993 – Sep 1993 |
| Roche, K. D. G-4-176051 | Sure Flow Oil & Gas, Inc. only | Encino Pasture, E. (5300 Gas) | Refugio | 1 | 347 | 175K | Sep 1999 – Jun 2002 |
| Roche, K. D. -D- G-2-66111 | H & D Operating Company only | Roche (6200) | Refugio | 1 | 345 | 205K | Oct 1993 – Jul 2009 |
| Lawrence Wood G-2-149755 | Hart Petroleum Services, Inc only | Woodsboro (3100) | Refugio | 1 | 344 | 427K | Feb 1994 – Feb 1999 |
| Rooke, F. B. & Sons Ltd. G-2-143980 | Gemarmi Inc. only | Roche (-C-) | Refugio | 1 | 338 | 495K | Jan 1993 – May 2008 |
| Welder C G-2-166380 | Wiser Oil Company, The only | Phil Power (5050 Frio) | Refugio | 1 | 332 | 602K | Nov 1997 – Apr 2005 |
| M. E. O'Connor G-2-290391 | T-C Oil Company, LLC only | Refugio Old (6200) | Refugio | 1 | 332 | 58.5K | Sep 2020 – Jun 2021 |
| Fagan C G-2-274293 | Allegiant Resources, LLC only | McFaddin (5150) | Refugio | 1 | 332 | 92.3K | May 2014 – Mar 2015 |
| Churchill Unit G-2-138008 | CTR Petroleum, Inc. only | La Rosa, North (6100) | Refugio | 1 | 321 | 21K | Jan 1993 – Aug 1993 |
| Claude E. Heard, et Al O-2-11465 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 1 | 317 | 62 | Jan 2018 – Feb 2018 |
| Fox, Cora G-2-145099 | Slack Oil & Gas only | Fagan (5830) | Refugio | 1 | 314 | 50.2K | Apr 1993 – Dec 1993 |
| Wilson Heard "A" O-2-7958 | Quintana Pet. Corp. only | Tom O'Connor (5350 Sand) | Refugio | 1 | 313 | 2.95K | Apr 1994 – Jun 1994 |
| Roadrunner O-2-11332 | TC Oil and Gas, LLC only | Kathleen (Tuttle 5845) | Refugio | 1 | 312 | 0 | May 2016 – Jul 2016 |
| Lambert, M. F. G-2-151991 | Pennzoil Exploration & Prod. Co. only | Refugio-Fox (5830) | Refugio | 1 | 306 | 50.7K | Oct 1994 – Mar 1995 |
| T-C Oil Co.-O'Connor O-2-7596 | T - C Oil Company only | Lake Pasture (FS-534) | Refugio | 1 | 298 | 10.9K | Jan 1993 – May 1993 |
| Duke Ranch -V- G-2-214365 | T-C Oil Company, LLC only | Tejas (Frio 4800) | Refugio | 1 | 297 | 939K | Aug 2005 – Apr 2026 |
| M. V. O'Connor Estate G-2-254135 | Kebo Oil & Gas, Inc. only | Lake Pasture, West (5900) | Refugio | 1 | 291 | 125K | Sep 2009 – Feb 2011 |
| Rooke, F. B. 7 G-2-175881 | C & E Operating, Inc. only | Roche, North (Frio 7000) | Refugio | 1 | 290 | 125K | Jul 1999 – May 2005 |
| Rooke, F. B. 7 G-2-175934 | C & E Operating, Inc. only | Roche (5800) | Refugio | 1 | 287 | 274K | Sep 1999 – Oct 2000 |
| Mrs. Fannie V. W. Heard O-2-11048 | Hilcorp Energy Company only | Tom O'Connor (5350 Sand) | Refugio | 1 | 285 | 34 | Oct 2015 – May 2016 |
| Twin Mott-B- O-2-9159 | T - C Oil Company only | TM Lake (7700) | Refugio | 1 | 279 | 16.3K | Jun 2007 – Jul 2007 |
| Zarsky G-2-115587 | Marwell Petroleum, Inc. only | Rooke Ranch (5050) | Refugio | 1 | 277 | 357K | Jan 1993 – Sep 2000 |
| Roche G-2-181551 | Wiser Oil Company, The only | Roche (6000 Sand) | Refugio | 1 | 277 | 14.5K | Jan 2000 – May 2001 |
| Thomson-Barrow Corp. C G-2-188475 | C & E Operating, Inc. only | Laura Thomson,s.e. (Chamberlain) | Refugio | 1 | 273 | 107K | Jan 2002 – Dec 2009 |
| Shelton, N. G-2-192648 | Cummins & Walker Oil Co., Inc. only | Refugio-Fox (5200) | Refugio | 1 | 272 | 216K | Dec 2002 – Jul 2004 |
| Tatton, V. H. -B- O-2-5941 | Pontiac Oil, Inc. only | Twin Creek (Marg.) | Refugio | 1 | 270 | 19 | Jan 1993 – Sep 1994 |
| Heard, Claude et Al O-2-7819 | Hilcorp Energy Company only | Tom Oconnor (5625 Sand) | Refugio | 1 | 268 | 477 | Jan 1993 – Mar 1993 |
| Schirmer "C-120" G-2-155746 | Christopher Oil & Gas Inc only | Bonnie View (5600) | Refugio | 1 | 260 | 4.77K | Oct 1995 – Oct 1995 |
| Breaker O-2-6940 | Pullin Lease Service, Inc. only | La Rosa, N. (6415) | Refugio | 1 | 259 | 20 | Jan 1993 – Nov 1994 |
| Martin O'Connor -M- G-2-280499 | T-C Oil Company, LLC only | Tivoli (Greta Second) | Refugio | 1 | 258 | 44.3K | Dec 2018 – Apr 2019 |