| North Cowden Unit O-10-20164 | Occidental Permian Ltd. only | Cowden, North | Ector | 1,651 | 99.7M | 44.2M | Jan 1993 – Apr 2026 |
| TXL North Unit O-10-20487 | Formentera Operations LLC only | TXL (Tubb) | Ector | 496 | 13.9M | 40.3M | Jan 1993 – Apr 2026 |
| East Cowden (Grayburg) Unit O-10-22927 | Basin Oil & Gas Operating, LLC only | Cowden, North | Ector | 92 | 10.4M | 3.6M | Jan 1993 – Apr 2026 |
| Rhodes Cowden Unit O-10-20538 | OXY USA WTP LP only | Cowden, North | Ector | 170 | 8.15M | 6.14M | Jan 1993 – Apr 2026 |
| North Penwell Unit O-10-21556 | Ring Energy, Inc. only | Penwell | Ector | 282 | 7.31M | 4.24M | Jan 1993 – Apr 2026 |
| Corrigan Cowden Unit O-10-24118 | OXY USA Inc. only | Cowden, North | Ector | 56 | 6.42M | 1.79M | Jan 1993 – Apr 2026 |
| Holt, O. B. /R/ O-10-797 | Occidental Permian Ltd. only | Cowden, North | Ector | 34 | 3.15M | 1.15M | Jan 1993 – Apr 2026 |
| North Foster Unit O-10-16940 | Aghorn Operating, Inc. only | Foster | Ector | 119 | 3.1M | 1.34M | Jan 1993 – Feb 2026 |
| Cowden, J. M. R/a -B- O-10-835 | Occidental Permian Ltd. only | Cowden, North (Deep) | Ector | 23 | 3.01M | 316K | Jan 1993 – Apr 2026 |
| Jennifer (Queen) Unit O-10-32616 | Richland Resources Corporation only | Concho Bluff, North (Queen) | Ector | 58 | 2.89M | 21 | Jan 1993 – Feb 2026 |
| Holt, O. B. -C- O-10-848 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 32 | 2.52M | 335K | Jan 1993 – Apr 2026 |
| Holt, O. B. O-10-23396 | Texland Petroleum, L.P. only | Cowden, North | Ector | 134 | 2.08M | 705K | Jan 1993 – Apr 2026 |
| Rhodes O-10-22344 | OXY USA WTP LP only | Cowden, North (Clear Fork) | Ector | 4 | 1.79M | 456K | Jan 1993 – Apr 2026 |
| Woods, E. N. O-10-737 | OXY USA Inc. only | Cowden, North | Ector | 27 | 1.79M | 378K | Jan 1993 – Apr 2026 |
| Blakeney, B. H. /Holt Pay/ O-10-845 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 24 | 1.72M | 386K | Jan 1993 – Apr 2026 |
| Cowden, J. M. R/a -A- O-10-834 | Occidental Permian Ltd. only | Cowden, North (Deep) | Ector | 31 | 1.61M | 212K | Jan 1993 – Apr 2026 |
| Barrow, Augusta O-10-14687 | Formentera Operations LLC only | Cowden, North | Ector | 16 | 1.45M | 69.9K | Jan 1993 – Nov 2025 |
| Holt, O. B. /S/ O-10-798 | Occidental Permian Ltd. only | Cowden, North | Andrews | 29 | 1.41M | 501K | Jan 1993 – Apr 2026 |
| Blakeney, B. H. O-10-843 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 4 | 1.32M | 100K | Jan 1993 – Apr 2026 |
| N. Concho Bluff Queen Unit O-10-16561 | OXY USA WTP EOR, LLC only | Concho Bluff, North (Queen) | Upton | 51 | 1.2M | 14.6K | Jan 1993 – Apr 2026 |
| Blakeney, B. H. -B- O-10-830 | Occidental Permian Ltd. only | Cowden, North (Deep) | Ector | 3 | 1.18M | 340K | Jan 1993 – Apr 2026 |
| Wight Unit O-10-20661 | United Oil & Shale LLC only | Cowden, North | Ector | 159 | 1.15M | 1.44M | Jan 1993 – Apr 2026 |
| Smith "19" O-10-34120 | Sahara Operating Company only | Cowden, North (Clear Fork) | Ector | 5 | 1.11M | 129K | Mar 1994 – Apr 2026 |
| Holt, Fay O-10-826 | OXY USA Inc. only | Cowden, North (Deep) | Ector | 11 | 1.01M | 174K | Jan 1993 – Apr 2026 |
| Slator O-10-32784 | Last Mile Production, LLC only | Concho Bluff, North (Queen) | Ector | 6 | 969K | 4.78K | Jan 1993 – Dec 2025 |
| Cochran, W. C. O-10-828 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 16 | 888K | 139K | Jan 1993 – Apr 2026 |
| Toad O-10-32025 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 13 | 821K | 251K | Jan 1993 – Apr 2026 |
| Johnson -B-36- O-10-31640 | OXY USA Inc. only | Cowden, North (Canyon) | Ector | 7 | 686K | 506K | Jan 1993 – Apr 2026 |
| Blakeney, B. H. -A- O-10-811 | OXY USA Inc. only | Cowden, North (Deep) | Ector | 7 | 670K | 170K | Jan 1993 – Mar 2026 |
| Ratliff O-10-14262 | R3 Operating Corporation only | Cowden, North | Ector | 38 | 552K | 33.6K | Jan 1993 – Apr 2026 |
| Blakeney, B. H. -C- O-10-813 | OXY USA Inc. only | Cowden, North (Deep) | Ector | 10 | 544K | 121K | Jan 1993 – Jan 2023 |
| Fasken, David -CH- O-10-28929 | Occidental Permian Ltd. only | Cowden, North | Andrews | 13 | 540K | 314K | Jan 1993 – Apr 2026 |
| 7814 JV-P Cran O-10-25322 | Libertad Operating LLC only | Cowden, North | Ector | 7 | 505K | 28.7K | Jan 1993 – Mar 2026 |
| Cowden, W. F. -A- O-10-837 | Occidental Permian Ltd. only | Cowden, North (Deep) | Ector | 16 | 489K | 103K | Jan 1993 – Apr 2026 |
| Wight, L. E. -A- O-10-9002 | Bridwell Oil Co. only | Cowden, North (Deep) | Ector | 2 | 489K | 4.74K | Jan 1993 – Apr 2026 |
| Holt, O. B. -E- Deep O-10-838 | Occidental Permian Ltd. only | Cowden, North (Deep) | Ector | 7 | 489K | 112K | Jan 1993 – Apr 2026 |
| Goldsmith, North Devonian Unit O-10-20194 | Octane Energy Operating, LLC only | Goldsmith, N. (Devonian) | Ector | 25 | 476K | 303K | Jan 1993 – Apr 2026 |
| Toad-A- O-10-32438 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 22 | 454K | 173K | Jan 1993 – Apr 2026 |
| Kloh, -B- O-10-8461 | OXY USA Inc. only | Cowden, North (Deep) | Ector | 4 | 451K | 128K | Jan 1993 – Apr 2026 |
| Blakeney-Sun O-10-842 | OXY USA Inc. only | Cowden, North (Deep) | Ector | 7 | 444K | 119K | Jan 1993 – Apr 2026 |
| Smith, R. W. -F- O-10-18618 | Occidental Permian Ltd. only | Cowden, North (San Andres) | Ector | 4 | 437K | 19K | Jan 1993 – Apr 2026 |
| Wight, L. E. "B" O-10-22460 | OXY USA Inc. only | Cowden, North (Deep) | Ector | 7 | 435K | 161K | Jan 1993 – Apr 2026 |
| Holt, O. B., Jr., Etal O-10-820 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 11 | 397K | 129K | Jan 1993 – Apr 2026 |
| Holt, O.B. Grbg O-10-20398 | Olsen Energy Inc. only | Cowden, North | Andrews | 97 | 386K | 57.4K | Jan 1993 – Apr 2026 |
| Blakeney -OA- O-10-814 | OXY USA Inc. only | Cowden, North (Deep) | Ector | 11 | 385K | 105K | Jan 1993 – Apr 2026 |
| Wight, Louie E. O-10-8821 | OXY USA Inc. only | Cowden, North (Deep) | Ector | 8 | 373K | 98.3K | Jan 1993 – Feb 2020 |
| Holt -D- O-10-847 | Texland Petroleum, L.P. only | Cowden, North (Deep) | Ector | 5 | 342K | 51.7K | Jan 1993 – Apr 2026 |
| Ector 'BH' Fee O-10-35146 | Texland Petroleum, L.P. only | Cowden, North (Clear Fork) | Ector | 3 | 341K | 25 | Nov 1996 – Apr 2026 |
| Smith, R.W. -CL- O-10-22661 | Vision Natural Resources, LP only | Cowden, North (Clear Fork) | Ector | 2 | 336K | 29.2K | Jan 1993 – Apr 2026 |
| Wight, L. E., Mrs. -4- O-10-9049 | United Oil & Shale LLC only | Cowden, North (Deep) | Ector | 16 | 334K | 45K | Jan 1993 – Jun 2023 |