| Oconnor, Thomas -A- O-2-1542 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 36 | 650K | 756K | Nov 1993 – Apr 2026 |
| Lambert, M. F. O-2-1549 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 26 | 315K | 830K | Jan 1993 – Apr 2026 |
| Lambert, M. F. O-2-1527 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 17 | 278K | 330K | Jan 1993 – May 2019 |
| Heard, Claude E., et Al O-2-1539 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 12 | 163K | 369K | Jan 1993 – Jan 2023 |
| Williams, Maude, Etal -A- O-2-1548 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 25 | 160K | 372K | Jan 1993 – Oct 2016 |
| Oconnor, Thos. -D- O-2-1544 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 3 | 120K | 75.3K | Jan 1993 – Dec 2015 |
| Oconnor, Thomas -E- O-2-1526 | T-C Oil Company, LLC only | Tom Oconnor | Refugio | 29 | 116K | 317K | Jan 1993 – Nov 2010 |
| Williams, Maude et al -C- O-2-1547 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 7 | 68K | 70.6K | Jan 1993 – Oct 2005 |
| Williams, Maude, Etal -B- O-2-1546 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 10 | 67.9K | 115K | Jan 1993 – Feb 2024 |
| Oconnor, Thomas -C- O-2-1543 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 11 | 61.5K | 88.8K | Jan 1993 – Oct 2009 |
| Heard, Fannie V. W., Mrs. O-2-1541 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 14 | 59.8K | 120K | Jan 1995 – Jan 2021 |
| Oconnor, Thomas -D- O-2-1525 | T-C Oil Company, LLC only | Tom Oconnor | Refugio | 7 | 53.8K | 552K | Jan 1993 – Dec 2005 |
| O'Connor, Thomas 'B' O-2-8373 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 42K | 22.9K | Jan 2002 – Apr 2011 |
| Oconnor, Thomas -B- O-2-1524 | T-C Oil Company, LLC only | Tom Oconnor | Refugio | 9 | 38.9K | 68.2K | Jan 1993 – Dec 2010 |
| Wilson Heard 'B' O-2-10161 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 20.8K | 8.43K | Apr 2012 – Oct 2025 |
| Heard, Wilson "B" O-2-8631 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 12.8K | 62.3K | Jun 2001 – Oct 2002 |
| Heard, Clement O-2-1540 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 3 | 7.31K | 64.2K | Jan 1993 – Apr 2001 |
| Lambert, M. F. G-2-84415 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 7.11K | 577K | Jan 1993 – May 2010 |
| Lambert, M.F. G-2-90036 | H & D Operating Company only | Tom Oconnor | Refugio | 1 | 5.45K | 1.15M | Jan 1993 – Oct 2004 |
| Heard, Wilson "A" O-2-8185 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 5.12K | 26.2K | Jun 1996 – Apr 2002 |
| Heard, Ira 'A' O-2-8381 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 4.89K | 133K | Jun 1998 – Aug 2002 |
| Nordan, L. A.-Oconnor, Thos. Est O-2-5335 | T-C Oil Company, LLC only | Tom Oconnor | Refugio | 4 | 4.48K | 502 | Jan 1993 – Jun 1998 |
| Nordan & Morris-Thos. O'Connor O-2-5990 | T - C Oil Company only | Tom Oconnor | Refugio | 1 | 2.43K | 1.59K | Jan 1993 – Jun 1998 |
| Heard, Clement O-2-9142 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 1.09K | 3.86K | May 2007 – Nov 2007 |
| Lambert, M. F. G-2-83736 | Devon Energy Production Co, L.P. only | Tom Oconnor | Refugio | 1 | 807 | 185K | Jan 1993 – Dec 1994 |
| Heard, Ira "B" O-2-9044 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 775 | 82.6K | Apr 2006 – Jul 2008 |
| Bauer, Mary Claire et Vir O-2-8758 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 589 | 12.3K | Dec 2002 – May 2003 |
| Heard, Ira 'A' G-2-271334 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 1 | 1.23K | Oct 2013 – Jan 2014 |
| Tom O'CONNOR(5800 SD) Field Unit O-2-5826 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 2 | 0 | 0 | — |
| Williams, Maude et al "A" O-2-8107 | Quintana Pet. Corp. only | Tom Oconnor | Refugio | 1 | 0 | 0 | — |
| Maude Williams et al "A" O-2-8140 | Quintana Pet. Corp. only | Tom Oconnor | Refugio | 1 | 0 | 0 | — |
| O'Connor, Thomas "B" O-2-8355 | Copano Company only | Tom Oconnor | — | 0 | 0 | 0 | — |
| Oconnor, Thomas -C- G-2-67536 | Quintana Pet. Corp. only | Tom Oconnor | Refugio | 1 | 0 | 0 | — |
| Tom O'CONNOR(5600 Foot Sand)unit O-2-8949 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 0 | 0 | — |
| Heard, Mrs. Fannie V. W. O-2-9070 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 0 | 0 | — |
| Scanio, M O-2-9792 | Digital Operating Company LLC only | Tom Oconnor | Refugio | 1 | 0 | 0 | — |
| Williams, Maude et al 'C' O-2-8424 | Quintana Pet. Corp. only | Tom Oconnor | Refugio | 1 | 0 | 0 | — |
| Heard, Fannie V. W. Mrs. G-2-139125 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 0 | 347K | Jan 1993 – Jan 1997 |
| O'Connor, Thomas "A" G-2-147556 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 0 | 28.8K | Nov 1993 – Feb 1999 |
| Heard, Fannie V.W. Mrs. G-2-151521 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 0 | 199K | Sep 1994 – Nov 2000 |
| Williams, Maude et al "A" G-2-154143 | Quintana Pet. Corp. only | Tom Oconnor | Refugio | 1 | 0 | 2.02K | Apr 1995 – Apr 1995 |
| Williams, Maude et al "A" G-2-155047 | Quintana Pet. Corp. only | Tom Oconnor | Refugio | 1 | 0 | 46.8K | Jun 1995 – Jan 1998 |
| O'Connor, Thomas "A" G-2-158867 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 0 | 1.75K | May 1996 – Dec 1996 |
| Heard, Fannie V. W., Mrs. G-2-168330 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 0 | 22.6K | Apr 1998 – Aug 1998 |
| Lambert, M. F. G-2-169751 | Devon Energy Production Co, L.P. only | Tom Oconnor | Refugio | 1 | 0 | 0 | — |
| O'Connor, Thomas 'C' G-2-173802 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 0 | 23.5K | May 1999 – Feb 2002 |
| Lambert, M. F. G-2-181053 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 0 | 66.7K | Dec 2000 – Mar 2003 |
| O'Connor, Thomas "A" G-2-190441 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 0 | 1.55K | Apr 2003 – May 2003 |
| Heard, Wilson "B" G-2-192191 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 0 | 56.4K | Oct 2002 – Mar 2004 |
| O'Connor, Thomas "C" G-2-201443 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 0 | 233K | Jan 2004 – Sep 2008 |