| O'Connor, Thomas "B" G-2-143511 | Quintana Pet. Corp. only | Mary Ellen O'Connor (8300) | Refugio | 1 | 8.42K | 108K | by Jan 1993 – Jul 1993 |
| O'Connor, Thomas "B" G-2-144285 | Quintana Pet. Corp. only | Mary Ellen Oconnor (Frio 6500) | Refugio | 1 | 5.6K | 175K | by Jan 1993 – Oct 1993 |
| Thomson-Barrow Corp. C G-2-187254 | C & E Operating, Inc. only | Laura Thompson,se (CHAMBERLAIN4) | Refugio | 1 | 4.69K | 261K | Aug 2001 – Aug 2003 |
| O'Connor, Thomas (Amoco) G-2-205584 | Greta Operating Company LLC only | Greta (5270) | Refugio | 1 | 3.34K | 374K | Jun 2004 – Jun 2012 |
| 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 |
| Thomson-Barrow Corp. C G-2-175655 | C & E Operating, Inc. only | Peponi Ranch (Frio 4800) | Refugio | 1 | 1.36K | 167K | Oct 1999 – Feb 2001 |
| Swyka G-2-183639 | C & E Operating, Inc. only | Laura Thomson (5600) | Refugio | 1 | 1.33K | 347K | Apr 2001 – May 2007 |
| 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 |
| 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, Thomas -A- G-2-137686 | Hilcorp Energy Company only | Tom O'CONNOR(4900) | Refugio | 1 | 393 | 1.58M | by 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 |
| 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 |
| O'Connor, Thomas G-2-203530 | Cambrian Management, Ltd. only | Greta, Deep (5660) | Refugio | 1 | 207 | 85.7K | Jun 2004 – Oct 2007 |
| O'Connor, Thomas -A- G-2-180991 | Hilcorp Energy Company only | Tom O'Connor (4925) | Refugio | 1 | 136 | 526K | Dec 2000 – Jul 2015 |
| O' Connor, Thomas "C" G-2-144281 | Quintana Pet. Corp. only | Tom Oconnor (5450 Sand) | Refugio | 1 | 107 | 296K | by Jan 1993 – May 1997 |
| Thomson-Barrow Corp. C G-2-175656 | C & E Operating, Inc. only | Laura Thomson (5600) | Refugio | 1 | 86 | 164K | Oct 1999 – Feb 2007 |
| O'Connor, Thomas 'B' G-2-179411 | Hilcorp Energy Company only | Mary Ellen Oconnor (FT-5) | Refugio | 1 | 78 | 113K | Aug 2000 – Dec 2009 |
| Thomas O'Connor -A- G-2-208132 | T-C Oil Company, LLC only | Tom Oconnor (4600) | Refugio | 1 | 50 | 491K | Feb 2005 – Jan 2011 |
| O'Connor, Thomas 'C' G-2-180970 | Hilcorp Energy Company only | Tom Oconnor (5300, East) | Refugio | 1 | 31 | 150K | Dec 2000 – Nov 2004 |
| O'Connor, Thomas G-2-189316 | Acock/Anaqua Operating Co., LP only | Greta, Deep (5430) | Refugio | 1 | 24 | 288K | Mar 2002 – Jul 2008 |
| O'Connor, Thomas -A- G-2-139323 | Hilcorp Energy Company only | Tom Oconnor (5400 Sand) | Refugio | 1 | 0 | 774K | by Jan 1993 – Jun 2005 |
| O'Connor, Thomas "C" G-2-137859 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 511K | by Jan 1993 – Mar 2007 |
| Oconnor, Thomas -B- G-2-76189 | Quintana Pet. Corp. only | Mary Ellen Oconnor (FQ-25) | Refugio | 1 | 0 | 0 | — |
| O'Connor, Thomas "A" G-2-147556 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 0 | 28.8K | Nov 1993 – Feb 1999 |
| O'Connor, Thomas "B" G-2-147288 | Hilcorp Energy Company only | Mary Ellen Oconnor (H-117) | Refugio | 1 | 0 | 207K | Oct 1993 – Feb 2018 |
| Thomas O'Connor -E- G-2-149301 | T-C Oil Company, LLC only | Tom Oconnor (4200) | Refugio | 1 | 0 | 166K | Apr 1994 – Aug 1999 |
| O'Connor, Thomas "A" G-2-151876 | Hilcorp Energy Company only | Tom Oconnor (5275) | Refugio | 1 | 0 | 5.61K | Oct 1994 – Dec 1994 |
| O'Connor, Thomas "A" G-2-153050 | Hilcorp Energy Company only | Tom O'Connor (4840) | Refugio | 1 | 0 | 23.5K | Jan 1995 – Dec 1998 |
| O'Connor, Thomas "A" G-2-156824 | Quintana Pet. Corp. only | Tom Oconnor (5650' Sand) | Refugio | 1 | 0 | 146K | Dec 1995 – Nov 1997 |
| O'Connor, Thomas (Amoco) G-2-137193 | Acock/Anaqua Operating Co., LP only | Greta (L- 3) | Refugio | 1 | 0 | 0 | — |
| O'Connor, Thomas "B" G-2-146764 | Hilcorp Energy Company only | Mary Ellen Oconnor (H-117) | Refugio | 1 | 0 | 245K | Sep 1993 – Jan 2010 |
| O'Connor, Thomas "C" G-2-145686 | Quintana Pet. Corp. only | Tom Oconnor (3550) | Refugio | 1 | 0 | 544K | May 1993 – May 1998 |
| O'Conner, Thomas "B" G-2-134993 | Quintana Pet. Corp. only | Mary Ellen Oconnor (FQ-25) | Refugio | 1 | 0 | 0 | — |
| Oconnor, Thomas -C- G-2-67536 | Quintana Pet. Corp. only | Tom Oconnor | Refugio | 1 | 0 | 0 | — |
| Oconnor, Thomas -C- G-2-38256 | Hilcorp Energy Company only | Tom Oconnor (4950) | Refugio | 1 | 0 | 1.54M | by Jan 1993 – May 2007 |
| O'Connor, Thomas "B" G-2-145243 | Hilcorp Energy Company only | Mary Ellen Oconnor (FQ-40 Sand) | Refugio | 1 | 0 | 86.8K | Mar 1993 – Feb 2004 |
| O'Connor, Thomas 'C' G-2-170209 | Hilcorp Energy Company only | Greta (C-1) | Refugio | 1 | 0 | 6.91K | Jul 1998 – Aug 1998 |
| O'Connor, Thomas -B- G-2-131973 | Quintana Pet. Corp. only | Mary Ellen Oconnor (FQ-40 Sand) | Refugio | 1 | 0 | 0 | — |
| O'Connor, Thomas 'B' G-2-166207 | Hilcorp Energy Company only | Mary Ellen O'Connor (FQ-3) | Refugio | 1 | 0 | 53.9K | Oct 1997 – Nov 2000 |
| O'Connor, Thomas "B" G-2-143826 | Quintana Pet. Corp. only | Mary Ellen Oconnor (FS-1) | Refugio | 1 | 0 | 5.18K | by Jan 1993 – May 1995 |
| Oconnor, Thomas -D- G-2-122102 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 0 | — |
| Oconnor, Thomas -D- G-2-66221 | T - C Oil Company only | Tom Oconnor (4200) | Refugio | 1 | 0 | 125K | by Jan 1993 – Dec 1998 |
| 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-2-173800 | Quintana Pet. Corp. only | Tom Oconnor (4050) | Refugio | 1 | 0 | 466K | May 1999 – Oct 1999 |
| O'Connor, Thomas 'C' G-2-173802 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 0 | 23.5K | May 1999 – Feb 2002 |
| O'Connor, Thomas 'C' G-2-174799 | Hilcorp Energy Company only | Tom O'CONNOR(4900) | Refugio | 1 | 0 | 37.4K | Aug 1999 – Nov 2002 |
| O'Connor, Thomas 'C' G-2-174800 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 1 | 0 | 85.3K | Aug 1999 – Jan 2001 |
| 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 "A" G-2-163137 | Hilcorp Energy Company only | Tom Oconnor (5450 Sand) | Refugio | 1 | 0 | 130K | May 1997 – Mar 2002 |