| O'Connor, Thomas -C- O-2-2876 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 59 | 2.99M | 2.17M | by Jan 1993 – Aug 2026 |
| Heard, Fannie, V. W., Mrs. O-2-2874 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 43 | 1.63M | 1.67M | by Jan 1993 – Aug 2023 |
| Heard, Clement O-2-2873 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 22 | 1.22M | 1.07M | by Jan 1993 – Aug 2026 |
| Reilly, Annie, et Vir O-2-2877 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 14 | 508K | 471K | by Jan 1993 – Aug 2026 |
| Lambert, M. F. O-2-2880 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 40 | 505K | 1.58M | by Jan 1993 – Aug 2026 |
| Williams, Maude, et al -A- O-2-2878 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 10 | 441K | 369K | by Jan 1993 – Jun 2024 |
| Bauer, Mary Claire et Vir O-2-8808 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 5 | 152K | 230K | Jul 2003 – Jan 2023 |
| Oconnor, Thomas, -A- O-2-2875 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 11 | 107K | 236K | by Jan 1993 – Oct 2008 |
| Lambert, M. F. O-2-8638 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 3 | 67.8K | 132K | Mar 2003 – Oct 2010 |
| Clay Pasture -E- State Unit O-2-12305 | T-C Oil Company, LLC only | McFaddin (3900) | Refugio | 1 | 59K | 86.9K | Dec 2021 – Aug 2026 |
| Oconnor -D- O-2-5195 | T - C Oil Company only | Lake Pasture (FT-690) | Refugio | 1 | 46.2K | 132K | by Jan 1993 – Mar 2004 |
| Williams, Maude et al "B" O-2-7714 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 5 | 40.8K | 109K | by Jan 1993 – Mar 2005 |
| Nordan,l. A.-Oconnor,thomas,est. O-2-2869 | T-C Oil Company, LLC only | Tom Oconnor (5900 Sand) | Refugio | 9 | 39.6K | 114K | by Jan 1993 – Jun 1998 |
| Roche, K. D. -E- State Oil Unit O-4-3615 | Texas, Les & Co. only | Encino (5900 Sd.) | Refugio | 1 | 38.7K | 20.1K | by Jan 1993 – May 2014 |
| Bauer, Mary Claire, et Vir O-2-2871 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 6 | 37.7K | 34.9K | by Jan 1993 – Apr 1998 |
| Rooke, F. B. 4 O-2-8532 | C & E Operating, Inc. only | Woodsboro, West (6900) | Refugio | 3 | 32.4K | 78K | Feb 2000 – Dec 2004 |
| Rooke, F. B. 7 O-2-8486 | C & E Operating, Inc. only | Roche, North (Frio 6900) | Refugio | 3 | 27.6K | 141K | Aug 1999 – Jan 2003 |
| Shelton G-2-233811 | Kebo Oil & Gas, Inc. only | Lake Pasture (FT-690) | Refugio | 1 | 24K | 949K | Jan 2008 – May 2015 |
| O'Connor, Dennis et al "N" O-2-7844 | T - C Oil Company only | Huff (5290) | Refugio | 1 | 20.2K | 159K | by Jan 1993 – Nov 2002 |
| Barber O-2-8156 | Mercy Oil and Gas, LP only | Blanco Creek (5790) | Refugio | 1 | 18.6K | 24.3K | Mar 1996 – Nov 2001 |
| Lambert, M. F. O-2-2866 | H & D Operating Company only | Tom Oconnor (5900 Sand) | Refugio | 7 | 17.5K | 30.4K | by Jan 1993 – Sep 1994 |
| Welder Heirs G-2-232689 | Kebo Oil & Gas, Inc. only | Lake Pasture (FT-690) | Refugio | 1 | 17.5K | 754K | Sep 2007 – Jul 2013 |
| Heard, Claud E., et Al O-2-2872 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 7 | 17.5K | 59.4K | by Jan 1993 – Apr 2007 |
| Oconnor, Thomas, -A- O-2-2864 | T-C Oil Company, LLC only | Tom Oconnor (5900 Sand) | Refugio | 3 | 12.5K | 47.9K | by Jan 1993 – Jun 1998 |
| Heard, Ira "B" O-2-8793 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 1 | 12K | 129K | May 2003 – Oct 2007 |
| Rooke B G-2-256232 | Coastal Plains Exploration, LLC only | Woodsboro, West (6900) | Refugio | 1 | 11.2K | 294K | Feb 2010 – Jul 2013 |
| Heard, Ira -A- O-2-2870 | Quintana Pet. Corp. only | Tom Oconnor (5900 Sand) | Refugio | 2 | 7.93K | 37.8K | Jul 1994 – Apr 1998 |
| Oconnor, Thomas, -B- O-2-2865 | Copano Company only | Tom Oconnor (5900 Sand) | Refugio | 1 | 4.24K | 26.9K | by Jan 1993 – Jun 1995 |
| O'Connor -H- G-2-294714 | T-C Oil Company, LLC only | McFaddin (3900) | Refugio | 1 | 3.22K | 350K | Jan 2023 – Aug 2026 |
| Nordan & Morris, Oconnor, Thomas O-2-2868 | T-C Oil Company, LLC only | Tom Oconnor (5900 Sand) | Refugio | 3 | 3.1K | 3.98K | by Jan 1993 – Aug 2008 |
| Marberry B O-2-10759 | Great Bay Operations, LLC only | McFaddin (5290) | Refugio | 1 | 2.5K | 5.95K | Sep 2013 – Apr 2014 |
| Thomson-Barrow Corp. C G-2-177142 | C & E Operating, Inc. only | Daniel O. Driscoll (Vksbg. 5900) | Refugio | 1 | 2.15K | 304K | Feb 2000 – Sep 2008 |
| Hynes G-2-132904 | Omega Energy Corp. only | Falcar (4900' Sand) | Refugio | 1 | 1.61K | 518K | by Jan 1993 – May 1999 |
| 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 |
| Williams, Maude, et al -A- O-2-4911 | Quintana Pet. Corp. only | Lake Pasture (FT-690) | Refugio | 3 | 1.23K | 5.19K | by Jan 1993 – Jun 1993 |
| Ira Heard "A" O-2-9649 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 1 | 1.03K | 739 | May 2011 – Aug 2011 |
| Thomson-Barrow Corp. C G-2-167791 | C & E Operating, Inc. only | Laura Thomson (Vicksburg 5907) | Refugio | 1 | 983 | 785K | Jan 1998 – Mar 2003 |
| Thomson-Barrow Corp. C G-2-187330 | C & E Operating, Inc. only | Laura Thomson (Vicksburg 5907) | Refugio | 1 | 958 | 285K | Aug 2001 – Nov 2009 |
| O'Connor -H- O-2-12489 | T-C Oil Company, LLC only | McFaddin (3900) | Refugio | 1 | 577 | 6.36K | Dec 2022 – Dec 2022 |
| R. S. I. G-2-272660 | Kebo Oil & Gas, Inc. only | Woodsboro (4900) | Refugio | 1 | 574 | 408K | Feb 2014 – Apr 2021 |
| Scanio, M "B" G-2-114263 | Acock/Anaqua Operating Co., LP only | Refugio-Fox (4900) | Refugio | 1 | 406 | 421K | by Jan 1993 – Nov 2018 |
| O'Connor, Thomas -A- G-2-137686 | Hilcorp Energy Company only | Tom O'CONNOR(4900) | Refugio | 1 | 393 | 1.58M | by Jan 1993 – Oct 2013 |
| Claude E. Heard, et Al O-2-11465 | Hilcorp Energy Company only | Tom Oconnor (5900 Sand) | Refugio | 1 | 317 | 62 | Jan 2018 – Feb 2018 |
| 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, 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 |
| Rooke, F. B. 4 G-2-201739 | C & E Operating, Inc. only | Woodsboro, West (6900) | Refugio | 1 | 247 | 75.1K | Feb 2003 – Jul 2004 |
| Thelma Heard G-2-245450 | Kebo Oil & Gas, Inc. only | Lake Pasture, West (5900) | Refugio | 1 | 222 | 119K | Feb 2009 – Mar 2011 |
| Baptist O-2-8397 | Dale Operating Company only | Blanco Creek (5790) | Refugio | 1 | 143 | 0 | Sep 1998 – Sep 1998 |
| Obrien, J. J., -A- O-2-4022 | Chilton Energy only | Greta, Deep (5900) | Refugio | 2 | 85 | 3 | Sep 1993 – Nov 1993 |