| South Foster Unit O-10-17541 | Occidental Permian Ltd. only | Foster | Ector | 224 | 12.6M | 3.31M | Jan 1993 – Jul 2026 |
| Witcher, J. E. O-10-21532 | Occidental Permian Ltd. only | Foster | Ector | 112 | 5.09M | 1.36M | Jan 1993 – Jul 2026 |
| Gist Unit O-10-19373 | Aghorn Operating, Inc. only | Foster | Ector | 155 | 4.57M | 1.18M | Jan 1993 – Jul 2026 |
| North Foster Unit O-10-16940 | Aghorn Operating, Inc. only | Foster | Ector | 119 | 3.1M | 1.34M | Jan 1993 – Jul 2026 |
| Johnson, J. L. -31- O-10-21835 | Basin Oil & Gas Operating, LLC only | Foster | Ector | 29 | 2.29M | 488K | Jan 1993 – Jul 2026 |
| Foster-Johnson Unit O-10-16793 | Aghorn Operating, Inc. only | Foster | Ector | 161 | 2.17M | 645K | Jan 1993 – Jul 2026 |
| Gist -A- O-10-1563 | Aghorn Operating, Inc. only | Foster | Ector | 37 | 1.92M | 565K | Jan 1993 – Jul 2026 |
| Foster, H. O-10-22457 | Occidental Permian Ltd. only | Cowden, South (Canyon 8790) | Ector | 8 | 1.78M | 1.36M | Jan 1993 – Jul 2026 |
| Foster, H. C. O-10-1538 | Aghorn Operating, Inc. only | Foster | Ector | 39 | 1.66M | 474K | Jan 1993 – Jul 2026 |
| Cowden, Elliott F., -A- O-10-1579 | Occidental Permian Ltd. only | Foster | Ector | 102 | 1.66M | 552K | Jan 1993 – Jul 2026 |
| Foster Gbsa Unit O-10-19371 | OXY USA Inc. only | Cowden, South | Ector | 131 | 1.48M | 585K | Jan 1993 – Jul 2026 |
| Cowden, Elliott F., -B- O-10-1580 | Occidental Permian Ltd. only | Foster | Ector | 56 | 1.34M | 419K | Jan 1993 – Jul 2026 |
| Bagley -A- O-10-1549 | OXY USA WTP LP only | Foster | Ector | 23 | 1.25M | 402K | Jan 1993 – Jul 2026 |
| Gist -C- O-10-1565 | Aghorn Operating, Inc. only | Foster | Ector | 16 | 1.04M | 320K | Jan 1993 – Jul 2026 |
| Foster 8 O-10-37284 | OXY USA WTP LP only | Cowden, South (Canyon 8790) | Ector | 3 | 998K | 907K | Feb 2004 – Jul 2026 |
| Bagley, Vina O-10-1567 | Aghorn Operating, Inc. only | Foster | Ector | 20 | 904K | 240K | Jan 1993 – Jul 2026 |
| Brock, L. E. O-10-21471 | Laguna Petroleum Corporation only | Foster | Ector | 19 | 848K | 259K | Jan 1993 – Jul 2026 |
| Witcher, J. E. O-10-21414 | Laguna Petroleum Corporation only | Foster | Ector | 22 | 768K | 238K | Jan 1993 – Jul 2026 |
| Gist -B- O-10-1564 | Aghorn Operating, Inc. only | Foster | Ector | 22 | 718K | 159K | Jan 1993 – Jul 2026 |
| Foster-Pegues Unit O-10-22199 | Laguna Petroleum Corporation only | Foster | Ector | 23 | 709K | 229K | Jan 1993 – Jul 2026 |
| S. Foster Gbsa Unit O-10-19372 | OXY USA Inc. only | Cowden, South | Ector | 29 | 675K | 307K | Jan 1993 – Jul 2026 |
| Witcher, J. E. -A- O-10-1574 | Occidental Permian Ltd. only | Foster | Ector | 20 | 647K | 222K | Jan 1993 – Jul 2026 |
| Witcher, J. E. -C- O-10-1605 | Occidental Permian Ltd. only | Foster | Ector | 9 | 629K | 178K | Jan 1993 – Jul 2026 |
| Foster, F. O-10-1581 | Occidental Permian Ltd. only | Foster | Ector | 21 | 611K | 264K | Jan 1993 – Jul 2026 |
| Foster -D- O-10-1610 | Aghorn Operating, Inc. only | Foster | Ector | 32 | 584K | 300K | Jan 1993 – Jul 2026 |
| Foster, H. S. O-10-929 | Helms Oil & Gas, LLC only | Cowden, South | Ector | 25 | 577K | 409K | Jan 1993 – Jul 2026 |
| Johnson, J. L., Unit O-10-19081 | O'Ryan Oil and Gas only | Foster | Ector | 41 | 567K | 169K | Jan 1993 – Jul 2026 |
| Foster, -C- O-10-1561 | Aghorn Operating, Inc. only | Foster | Ector | 16 | 557K | 196K | Jan 1993 – Jul 2026 |
| Foster, H. C. O-10-22782 | Laguna Petroleum Corporation only | Foster | Ector | 20 | 539K | 164K | Jan 1993 – Jul 2026 |
| Bagley, J. E. O-10-1608 | Aghorn Operating, Inc. only | Foster | Ector | 7 | 517K | 114K | Jan 1993 – Jul 2026 |
| Witcher, J. E. -7- O-10-1558 | Occidental Permian Ltd. only | Foster | Ector | 15 | 514K | 125K | Jan 1993 – Jul 2026 |
| Foster -AA- O-10-31466 | Occidental Permian Ltd. only | Cowden, South (Canyon 8900) | Ector | 1 | 493K | 882K | Jan 1993 – May 2022 |
| Johnson, Lyda Mae O-10-21686 | Momentum Energy Corporation only | Foster | Ector | 3 | 448K | 28.3K | Jan 1993 – Jul 2026 |
| Foster 8-5 O-10-37906 | OXY USA WTP LP only | Cowden, South (Canyon 8790) | Ector | 2 | 385K | 306K | Aug 2006 – Jul 2026 |
| Gist O-10-37443 | OXY USA WTP LP only | Foster (Wolfcamp-Baxter) | Ector | 1 | 378K | 212K | Oct 2004 – Jul 2026 |
| Witcher, J. E. -PA- O-10-1606 | Occidental Permian Ltd. only | Foster | Ector | 7 | 377K | 88.3K | Jan 1993 – Jul 2026 |
| Foster "E" O-10-24323 | OXY USA WTP LP only | Cowden, South (Dev.) | Ector | 2 | 286K | 1.11M | Jan 1993 – Jul 2026 |
| Gist, Etal O-10-1620 | Aghorn Operating, Inc. only | Foster | Ector | 8 | 280K | 37K | Jan 1993 – Jul 2026 |
| Foster F O-10-34843 | OXY USA WTP LP only | Cowden, South (Canyon 8790) | Ector | 3 | 264K | 693K | Jan 1996 – Jul 2026 |
| Foster O-10-8793 | Par Development only | Cowden, South | Ector | 7 | 233K | 172K | Jan 1993 – Jul 2026 |
| Witcher, J. E. -PB- O-10-1607 | Occidental Permian Ltd. only | Foster | Ector | 9 | 218K | 53.7K | Jan 1993 – Jul 2026 |
| Foster, H. C. O-10-1611 | Occidental Permian Ltd. only | Foster | Ector | 12 | 211K | 94.3K | Jan 1993 – Jul 2026 |
| Foster-J O-10-30774 | Conocophillips Company only | Cowden, South (Canyon 8790) | Ector | 2 | 210K | 174K | Jan 1993 – Feb 2010 |
| Foster, H. S. O-10-10877 | Par Development only | Cowden, South | Ector | 6 | 206K | 197K | Jan 1993 – Jul 2026 |
| Foster, H. S., -A- O-10-16154 | OXY USA Inc. only | Cowden, South | Ector | 19 | 201K | 21.3K | Jan 1993 – Jul 2026 |
| Foster, H. S. -C- O-10-9641 | Helms Oil & Gas, LLC only | Double -H- (Grayburg) | Ector | 6 | 185K | 104K | Jan 1993 – Jul 2026 |
| Foster E O-10-34740 | OXY USA WTP LP only | Cowden, South (Canyon 8790) | Ector | 1 | 182K | 313K | Nov 1995 – Jul 2026 |
| RJ 5 O-10-36367 | OXY USA WTP LP only | Foster (Clearfork-Baxter) | Ector | 2 | 171K | 18.7K | Apr 2000 – Jul 2026 |
| Foster, H. S. O-10-8302 | OXY USA Inc. only | Cowden, South | Ector | 17 | 168K | 86.2K | Jan 1993 – Jul 2026 |
| Pinnacle O-10-35651 | Baxter, D. B. Inc. only | Foster (Wolfcamp-Baxter) | Ector | 1 | 162K | 70.7K | Nov 1997 – Jul 2026 |