| Lambert, M. F. G-2-93703 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 69 | 966K | Jan 1993 – Jun 2015 |
| Heard, Claude E. et Al G-2-147369 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 20 | 676K | Nov 1993 – Feb 2014 |
| Copano Gas Unit G-2-72555 | T - C Oil Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 77.3K | Feb 1993 – Oct 1998 |
| Copano Gas Unit G-2-107068 | Copano Gas Unit only | Tom Oconnor (4200) | Refugio | 1 | 0 | 229K | Jan 1993 – Jul 1996 |
| Copano Gas Unit G-2-107069 | T - C Oil Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 244K | Jan 1993 – Oct 1998 |
| Copano Gas Unit G-2-115944 | T - C Oil Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 330K | Jan 1993 – Jan 2006 |
| Oconnor, Thomas -A- G-2-116554 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 617K | Jan 1993 – Aug 2008 |
| Oconnor, Thomas -D- G-2-122102 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 0 | — |
| Williams, Maude et al -A- G-2-135290 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 229K | Jan 1993 – May 1997 |
| Williams, Maude et al -A- G-2-136550 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 240K | Jan 1993 – May 2005 |
| Heard, Fannie V. W. Mrs. G-2-136936 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 791K | Jan 1993 – Jan 2021 |
| Heard, Mrs. Fannie V. W. G-2-137494 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 504K | Jan 1993 – Jan 2006 |
| Heard, Clement G-2-137592 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 198K | Jan 1993 – May 2001 |
| Reilly, Annie G-2-137595 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 392K | Jan 1993 – Nov 2002 |
| O'Connor, Thomas "C" G-2-137859 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 511K | Jan 1993 – Mar 2007 |
| Heard, Claude G-2-139123 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 405K | Jan 1993 – Sep 2010 |
| Heard, Fannie V. W. Mrs. G-2-139252 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 554K | Jan 1993 – Jan 2000 |
| O'Connor, Thomas "A" G-2-140455 | Quintana Pet. Corp. only | Tom Oconnor (4200) | Refugio | 1 | 0 | 280K | Jan 1993 – Sep 1999 |
| Williams, Maude et al "C" G-2-140731 | Quintana Pet. Corp. only | Tom Oconnor (4200) | Refugio | 1 | 0 | 133K | Jan 1993 – Jun 1998 |
| Heard, Claude E. , et Al G-2-143165 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 364K | Jan 1993 – Feb 2006 |
| Williams, Maude et al "B" G-2-145607 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 541K | Feb 1993 – Aug 2003 |
| Bauer, Claire Mary et Vir G-2-145883 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 108K | Jun 1993 – Mar 1997 |
| Thomas O'Connor -E- G-2-149301 | T-C Oil Company, LLC only | Tom Oconnor (4200) | Refugio | 1 | 0 | 166K | Apr 1994 – Aug 1999 |
| Heard, Fannie V. W. Mrs. G-2-151873 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 721K | Oct 1994 – Aug 2017 |
| Heard, Ira "A" G-2-156612 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 118K | Dec 1995 – Sep 2002 |
| Lambert, M. F. G-2-156622 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 594K | Dec 1995 – Dec 2010 |
| Heard, Fannie V. W. Mrs. G-2-159454 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 859K | Jul 1996 – Nov 2014 |
| O'Connor, Thomas "A" G-2-159625 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 168K | Jul 1996 – Dec 1999 |
| O'Connor, Thomas "C" G-2-160101 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 383K | Sep 1996 – Sep 2010 |
| O'Connor, Thomas -A- G-2-161310 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 110K | Nov 1996 – Mar 2000 |
| Williams, Maude et al 'A' G-2-162201 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 57.9K | Mar 1997 – Sep 1998 |
| Williams, Maude et al 'A' G-2-162397 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 39K | Mar 1997 – Jan 2001 |
| O'Connor, Thomas -C- G-2-166198 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 546K | Nov 1997 – Mar 2011 |
| Bauer, Mary Claire et Vir G-2-166975 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 69.1K | Jan 1998 – Aug 2002 |
| Heard, Clement G-2-167023 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 216K | Dec 1997 – Feb 2010 |
| Copano Gas Unit G-2-167860 | T - C Oil Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 394K | Mar 1998 – Mar 2008 |
| Heard, Ira 'A' G-2-168268 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 26.2K | Sep 1997 – Jan 2000 |
| Williams, Maude et al 'B' G-2-170009 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 290K | Jun 1998 – Feb 2007 |
| Williams, Maude et al -A- G-2-171177 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 127K | May 1998 – Mar 2006 |
| O'Connor, Thomas -D- G-2-172159 | T - C Oil Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 160K | Jan 1999 – Feb 2004 |
| O'Connor, Thomas 'C' G-2-175026 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 243K | Sep 1999 – Dec 2006 |
| O'Connor, Thomas 'C' G-2-176352 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 95.6K | Feb 2000 – Oct 2004 |
| Williams, Maude et al "A" G-2-181575 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 303K | Jan 2001 – Oct 2008 |
| O'Connor, Thomas -A- G-2-183195 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 285K | Mar 2001 – Sep 2011 |
| Lambert, M. F. G-2-183375 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 19.9K | Apr 2001 – Jan 2002 |
| O'Connor, Thomas "C" G-2-188183 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 163K | Jan 2002 – Sep 2005 |
| Clement Heard G-2-205795 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 66.1K | Jan 2005 – Oct 2010 |
| Copano Gas Unit G-2-211897 | T - C Oil Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 0 | — |
| Lambert, M.F. G-2-214261 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 134 | Jul 2005 – Jul 2005 |
| Heard, Clement G-2-217490 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 65.8K | Dec 2005 – Mar 2009 |