| TXL South Unit O-10-20726 | Formentera Operations LLC | TXL (Tubb) | Ector | 718 | 21.3M | 42.2M | Jan 1993 – Jul 2026 |
| TXL North Unit O-10-20487 | Formentera Operations LLC | TXL (Tubb) | Ector | 496 | 13.9M | 40.3M | Jan 1993 – Jul 2026 |
| Goldsmith-Cummins /Deep/ Unit O-10-20543 | Formentera Operations LLC | Goldsmith (Clear Fork) | Ector | 396 | 10.2M | 28.1M | Jan 1993 – Jul 2026 |
| Barrow, Augusta O-10-43701 | Formentera Operations LLC | Spraberry (Trend Area) | Ector | 37 | 1.79M | 4.32M | Mar 2013 – Jul 2026 |
| Barrow, Augusta O-10-14687 | Formentera Operations LLC | Cowden, North | Ector | 16 | 1.45M | 69.9K | Jan 1993 – Jul 2026 |
| Laren O-10-2130 | Formentera Operations LLC | Goldsmith (Clear Fork) | Ector | 14 | 1.21M | 2.11M | Jan 1993 – Jul 2026 |
| Cummins, H. E. O-10-11783 | Formentera Operations LLC | Goldsmith (Clear Fork) | Ector | 14 | 871K | 3.9M | Jan 1993 – Jul 2026 |
| Cummins -B- O-10-12239 | Formentera Operations LLC | Goldsmith (Clear Fork) | Ector | 27 | 784K | 1.92M | Jan 1993 – Jul 2026 |
| Cummins, H. E. -C- O-10-11966 | Formentera Operations LLC | Goldsmith (Clear Fork) | Ector | 12 | 588K | 1.74M | Jan 1993 – Jul 2026 |
| Blue Estate O-10-15745 | Formentera Operations LLC | Wheeler (Wolfcamp) | Winkler | 11 | 585K | 6.27M | Jan 1993 – Jul 2026 |
| Carlinville National Bank O-10-15281 | Formentera Operations LLC | Yarbrough & Allen (Devonian) | Ector | 5 | 283K | 396K | Jan 1993 – Jul 2026 |
| TXL O-10-25455 | Formentera Operations LLC | Cowden, North | Ector | 7 | 256K | 520K | Jan 1993 – Jul 2026 |
| Cummins, H.E. 'K' O-10-37058 | Formentera Operations LLC | Goldsmith (Clear Fork) | Ector | 2 | 221K | 494K | Feb 2003 – Jul 2026 |
| Slator, J. D., Jr. O-10-12795 | Formentera Operations LLC | Goldsmith (Clear Fork) | Ector | 7 | 221K | 501K | Jan 1993 – Jul 2026 |
| Blue, R. H. O-10-15464 | Formentera Operations LLC | Wheeler (Wolfcamp) | Ector | 4 | 216K | 1.61M | Jan 1993 – Jul 2026 |
| Cahill, T. G., -B- O-10-13476 | Formentera Operations LLC | Wheeler (Wolfcamp) | Ector | 2 | 198K | 390K | Jan 1993 – Jul 2026 |
| Cummins, H.e."k" O-10-24278 | Formentera Operations LLC | Goldsmith, N. (San Andres, Con.) | Ector | 3 | 189K | 482K | Jan 1993 – Jul 2026 |
| Mrs. T. B. Roberts R/a -A- O-10-29630 | Formentera Operations LLC | Fasken (Penn.) | Ector | 2 | 148K | 1.21M | Jan 1993 – Jul 2026 |
| TXL O-10-846 | Formentera Operations LLC | Cowden, North (Deep) | Ector | 6 | 141K | 241K | Jan 1993 – Jul 2026 |
| Cummins, H. E. -A- O-10-35910 | Formentera Operations LLC | Goldsmith (Clear Fork) | Ector | 4 | 140K | 651K | May 1998 – Jul 2026 |
| Slator -B- O-10-6972 | Formentera Operations LLC | TXL (Ellenburger) | Ector | 2 | 130K | 430K | Jan 1993 – Jul 2026 |
| Barrow, Augusta O-10-45396 | Formentera Operations LLC | Lowe (Atoka) | Ector | 4 | 129K | 340K | Nov 2013 – Jul 2026 |
| TXL -E- O-10-15708 | Formentera Operations LLC | TXL (Devonian) | Ector | 5 | 111K | 766K | Jan 1993 – Jul 2026 |
| Barrow, Augusta O-10-27395 | Formentera Operations LLC | Hence (Grayburg) | Ector | 3 | 110K | 17.8K | Jan 1993 – Jul 2026 |
| Wheeler, R. A., -F- O-10-15471 | Formentera Operations LLC | Wheeler (Wolfcamp) | Ector | 2 | 103K | 1.13M | Jan 1993 – Jul 2026 |
| Ector -E- Fee NCT-2 O-10-17723 | Formentera Operations LLC | Harper (Ellenburger) | Ector | 2 | 100K | 107K | Jan 1993 – Jul 2026 |
| Barrow, Augusta O-10-16516 | Formentera Operations LLC | Headlee, N. (Devonian) | Ector | 11 | 99.7K | 937K | Jan 1993 – Jul 2026 |
| TXL -G- O-10-16060 | Formentera Operations LLC | Lawson (San Andres) | Ector | 2 | 97K | 312K | Jan 1993 – Jul 2026 |
| Slator -B- O-10-15546 | Formentera Operations LLC | TXL (Devonian) | Ector | 3 | 96.9K | 521K | Jan 1993 – Jul 2026 |
| Barrow, Augusta O-10-354 | Formentera Operations LLC | Barrow (Ellenburger) | Ector | 4 | 87.9K | 99.2K | Jan 1993 – Jun 2026 |
| TXL -L- a/C 2 O-10-16052 | Formentera Operations LLC | TXL (Devonian) | Ector | 2 | 77.6K | 470K | Jan 1993 – Jul 2026 |
| TXL -M- O-10-15952 | Formentera Operations LLC | TXL (Devonian) | Ector | 2 | 70.8K | 464K | Jan 1993 – Jul 2026 |
| Slator -C- O-10-35827 | Formentera Operations LLC | TXL (Silurian) | Ector | 1 | 63.7K | 725K | Sep 1997 – Jul 2026 |
| Wheeler, R. A. O-10-13691 | Formentera Operations LLC | Wheeler (Wolfcamp) | Ector | 4 | 59.6K | 154K | Jan 1993 – Jul 2026 |
| Thomas -A- O-10-6924 | Formentera Operations LLC | TXL (Devonian) | Ector | 2 | 54K | 191K | Jan 1993 – Jul 2026 |
| TXL -L- a/C III O-10-12455 | Formentera Operations LLC | TXL (Devonian) | Ector | 2 | 53.8K | 302K | Jan 1993 – Jul 2026 |
| TXL -N- O-10-22628 | Formentera Operations LLC | TXL (Silurian) | Ector | 2 | 51.1K | 245K | Jan 1993 – Jul 2026 |
| T. X. L. -L- a/C #1 O-10-6921 | Formentera Operations LLC | TXL (Devonian) | Ector | 3 | 41.4K | 270K | Jan 1993 – Jul 2026 |
| Arco-Hugh Corrigan O-10-30497 | Formentera Operations LLC | Fasken (Penn.) | Ector | 1 | 39.8K | 61.1K | Jan 1993 – Jul 2026 |
| TXL 'P' O-10-37059 | Formentera Operations LLC | Goldsmith (Clear Fork) | Ector | 4 | 37.8K | 142K | Feb 2003 – Jul 2026 |
| Wheeler, R. A. O-10-31889 | Formentera Operations LLC | Wheeler (Waddell) | Ector | 1 | 37.3K | 101K | Jan 1993 – Jul 2026 |
| Barrow, Augusta O-10-35412 | Formentera Operations LLC | Headlee, N. (Canyon) | Ector | 1 | 34.9K | 17.2K | Jun 1997 – Jul 2026 |
| TXL 41 O-10-44642 | Formentera Operations LLC | TXL (Wichita Albany, South) | Ector | 8 | 33.5K | 118K | Oct 2013 – Jul 2026 |
| Slator -B- O-10-14839 | Formentera Operations LLC | TXL (Wolfcamp, North) | Ector | 2 | 27.9K | 188K | Jan 1993 – Jul 2026 |
| Scharbauer -N- O-10-20084 | Formentera Operations LLC | Goldsmith, N. (San Andres, Con.) | Ector | 3 | 25.5K | 112K | Jan 1993 – Jul 2026 |
| Ector "C" Fee NCT-1 O-10-28552 | Formentera Operations LLC | Mosswell (Strawn 8720) | Ector | 1 | 24.9K | 544 | Jan 1993 – Jul 2026 |
| Edwards, Will P. -A- O-10-43331 | Formentera Operations LLC | Wheeler (Devonian) | Ector | 1 | 22K | 95.1K | Aug 2012 – Jul 2026 |
| TXL -L- a/C 1 O-10-20226 | Formentera Operations LLC | Goldsmith, W. (San Andres) | Ector | 4 | 19.7K | 97.9K | Jan 1993 – Jul 2026 |
| Slator -E- O-10-39678 | Formentera Operations LLC | TXL (Wolfcamp) | Ector | 1 | 19.1K | 230K | May 2009 – Jul 2026 |
| Parker, J. E. O-10-42318 | Formentera Operations LLC | TXL (Wichita Albany, South) | Ector | 2 | 16.5K | 25.5K | Dec 2011 – Jul 2026 |