| O'Connor, Martin -G- G-2-230751 | T - C Oil Company only | Lower Martin O'Connor (8600) | Refugio | 1 | 4.34K | 196K | Aug 2007 – Jul 2011 |
| Scanio/Shelton G-2-243787 | High Plains Gas Systems, Inc. only | Mission River (7200) | Refugio | 1 | 4.33K | 65.2K | Jun 2008 – Jun 2015 |
| Collins Estate O-2-6941 | Pat's P & a, Inc. only | Bonnie View, South (8030) | Refugio | 1 | 4.31K | 3.6K | Jan 1993 – Mar 1995 |
| Heard-State Unit #1 O-2-7638 | CTR Petroleum, Inc. only | Refugio Heard (5350) | Refugio | 1 | 4.28K | 8.4K | Jan 1993 – Apr 1996 |
| Martin O'Connor G-2 Unit G-2-234415 | T - C Oil Company only | Lower Martin O'Connor (8600) | Refugio | 1 | 4.27K | 177K | Mar 2008 – Apr 2009 |
| Maude Williams et al 'A' O-2-10985 | Hilcorp Energy Company only | Lake Pasture (FS-550) | Refugio | 2 | 4.26K | 13.7K | Jul 2015 – Jun 2018 |
| Oconnor, Thomas, -B- O-2-2865 | Copano Company only | Tom Oconnor (5900 Sand) | Refugio | 1 | 4.24K | 26.9K | Jan 1993 – Jun 1995 |
| Thomas O'Connor 'C' O-2-10391 | Hilcorp Energy Company only | Tom Oconnor (4400) | Refugio | 1 | 4.23K | 2.9K | Nov 2012 – Mar 2026 |
| Williams, Maude et al "A" O-2-9006 | Hilcorp Energy Company only | Lake Pasture (FS-517) | Refugio | 2 | 4.21K | 7.8K | Nov 2005 – Dec 2007 |
| Martin O'Connor-E- G-2-225443 | T-C Oil Company, LLC only | Tivoli (Greta Second) | Refugio | 1 | 4.14K | 661K | Jan 2007 – Nov 2011 |
| Roche, K. D. A G-2-148676 | H & D Operating Company only | Roche (-B-) | Refugio | 1 | 4.11K | 354K | Mar 1994 – Nov 1995 |
| Welder Heirs TC G-2-284331 | Charro Operating, L.L.C. only | Greta, North (6440) | Refugio | 1 | 4.11K | 226K | Dec 2017 – Apr 2019 |
| Welder "D" O-2-8208 | Wiser Oil Company, The only | Phil Power (5100) | Refugio | 1 | 4.1K | 0 | Aug 1996 – Feb 1997 |
| Welder "Q" O-2-8629 | Wiser Oil Company, The only | Phil Power (5100) | Refugio | 1 | 4.06K | 4.49K | Jun 2001 – Jan 2003 |
| Heard, F. V. W. -B- G-2-92454 | CTR Petroleum, Inc. only | Refugio Heard (6300) | Refugio | 1 | 4.03K | 47.8K | Jan 1993 – Jul 1994 |
| Buckley, John O-2-2883 | Bellows Operating Co., L. C. only | Refugio Old | Refugio | 1 | 4K | 19 | Jan 1993 – Jul 2009 |
| M.V.O.C.-Baptist Unit G-2-244404 | Charro Operating, L.L.C. only | Blanco Creek (6400) | Refugio | 1 | 3.97K | 133K | Nov 2008 – Aug 2011 |
| Rooke, B. D. O-2-2768 | Laroco LLP only | La Rosa (Driscoll) | Refugio | 1 | 3.96K | 9.98K | Jan 1993 – Sep 1994 |
| Scanio/Shelton G-2-205433 | High Plains Gas Systems, Inc. only | Mission River (6300) | Refugio | 1 | 3.91K | 135K | Aug 2004 – Oct 2006 |
| Oconnor, Thomas "E" O-2-4861 | T-C Oil Company, LLC only | Tom Oconnor (5500 Sand) | Refugio | 4 | 3.89K | 8.77K | Jan 1993 – Mar 1998 |
| Scanio/Shelton G-2-250577 | Paloma Operating, LLC only | Mission River (8400) | Refugio | 1 | 3.82K | 72.5K | Aug 2008 – Feb 2020 |
| Schirmer-Buck Unit O-2-8583 | Christopher Oil & Gas Inc only | Bonnie View (5600) | Refugio | 1 | 3.79K | 38.5K | Dec 2000 – Jul 2001 |
| Williams, Maude et al "C" O-2-8549 | Quintana Pet. Corp. only | Tom O'Connor (5730, East) | Refugio | 2 | 3.79K | 4.04K | Feb 2000 – Aug 2000 |
| O'Connor "B" O-2-8541 | Bishop Petroleum Inc. only | Train Wreck (6000 Sd.) | Refugio | 1 | 3.78K | 7.95K | Apr 2000 – Jul 2001 |
| Hynes O-2-8169 | Magnum Producing, LP only | Papalote, E. (6000 Stray) | Refugio | 1 | 3.78K | 361 | Jan 1996 – Dec 1996 |
| Mary Claire Bauer et Vir O-2-11288 | Hilcorp Energy Company only | Tom Oconnor (6300) | Refugio | 1 | 3.76K | 3.47K | Oct 2016 – Jul 2020 |
| Barber Unit G-2-181046 | Cummins & Walker Oil Co., Inc. only | Agnes Barber (Chamberlain 2ND) | Refugio | 1 | 3.74K | 17.7K | Dec 2000 – Apr 2001 |
| La Rosa Unit G-2-188460 | Rising Star Energy Partners II, only | La Rosa (6750, Above, Gas) | Refugio | 1 | 3.71K | 427K | Jan 2002 – Jan 2021 |
| Maude Williams et al 'A' O-2-11312 | Hilcorp Energy Company only | Lake Pasture (FT-750) | Refugio | 1 | 3.64K | 16.8K | Oct 2016 – Jul 2017 |
| Williams, Maude et al "A" O-2-7436 | Quintana Pet. Corp. only | Tom O'Connor (5350 Sand) | Refugio | 1 | 3.63K | 7.71K | Jan 1993 – Dec 1994 |
| Niemann, Emil O-2-8722 | J&G Oil & Gas only | Bonnie View (6200 Sand) | Refugio | 1 | 3.56K | 19.3K | May 2002 – Jan 2003 |
| O'Connor, Thos. "B" O-2-7327 | Copano Company only | Tom Oconnor (5425 Sand) | Refugio | 1 | 3.56K | 23.7K | Jan 1993 – Jul 1995 |
| Vidauri "F" G-2-245908 | Charro Operating, L.L.C. only | Greta, North (6300 Frio) | Refugio | 1 | 3.53K | 365K | Jan 2009 – Oct 2012 |
| Oconnor, Thos., -E- O-2-4088 | T - C Oil Company only | Tom Oconnor (5425 Sand) | Refugio | 3 | 3.51K | 17.9K | Jan 1993 – Mar 1998 |
| Rooke South G-2-266001 | Rising Star Energy Partners II, only | La Rosa (6750, Below, Gas) | Refugio | 1 | 3.48K | 196K | Sep 2011 – Jul 2013 |
| Welder "G" G-2-162524 | Forest Oil Corporation only | Phil Power (5550) | Refugio | 1 | 3.46K | 2.03M | Feb 1997 – Mar 2010 |
| Claude E. Heard, et Al O-2-9866 | Hilcorp Energy Company only | Tom Oconnor, N. (5160) | Refugio | 1 | 3.45K | 366 | Nov 2011 – Aug 2012 |
| Rooke O-2-9082 | Republic Resources, LLC. only | Rooke (Frio 7300) | Refugio | 1 | 3.36K | 114K | Oct 2006 – Jun 2007 |
| Jacks et Al G-2-182524 | Neumin Production Company only | Big Jim (First Sinton) | Refugio | 1 | 3.35K | 97K | Nov 2000 – Jun 2002 |
| O'Connor, Thomas (Amoco) G-2-205584 | Greta Operating Company LLC only | Greta (5270) | Refugio | 1 | 3.34K | 374K | Jun 2004 – Jun 2012 |
| Kelly, D. M. G-2-63176 | Acock/Anaqua Operating Co., LP only | Refugio Old (4800) | Refugio | 1 | 3.28K | 154K | Oct 1995 – Aug 2008 |
| Rooke, B. D. O-2-2371 | Laroco LLP only | La Rosa (6300 Sand) | Refugio | 5 | 3.28K | 8.75K | Jan 1993 – Dec 1994 |
| O'Connor, Thomas "B" O-2-8011 | Quintana Pet. Corp. only | Melon Creek, East (7850) | Refugio | 1 | 3.26K | 6.81K | Oct 1994 – Jun 1995 |
| Anderson, Mary Alice et al "A" G-2-147058 | Maran Oil Company only | Fagan (5830) | Refugio | 1 | 3.26K | 415K | Oct 1993 – Nov 2000 |
| Lambert, M. F. G-2-145259 | Pennzoil Exploration & Prod. Co. only | Siene Bean (6300) | Refugio | 1 | 3.23K | 241K | Apr 1993 – Jul 1994 |
| Thomas O'Connor 'D' O-2-11165 | Hilcorp Energy Company only | Mary Ellen Oconnor (FT-5) | Refugio | 1 | 3.19K | 11.6K | Jan 2016 – Feb 2018 |
| O'Brien, J. M. J-1 (AR) O-2-8633 | Acock/Anaqua Operating Co., LP only | Greta (O-6) | Refugio | 1 | 3.18K | 0 | Jun 2001 – Mar 2009 |
| Rooke G-2-219281 | Republic Resources, LLC. only | Rooke (Frio 8660) | Refugio | 1 | 3.11K | 227K | Jan 2006 – Mar 2007 |
| Nordan & Morris, Oconnor, Thomas O-2-2868 | T-C Oil Company, LLC only | Tom Oconnor (5900 Sand) | Refugio | 3 | 3.1K | 3.98K | Jan 1993 – Aug 2008 |
| Welder Heirs G-2-180674 | C & E Operating, Inc. only | Devils Run (5970 Frio) | Refugio | 1 | 3.06K | 447K | Jul 2000 – Nov 2003 |