| Keystone Cattle Co. a #47242-495-33339 | BCP Resources LLC only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 8,684 | Sep 27, 2026 | 3 | Apr 2026 |
| Bashara M. J. -E- #7142-495-31942 | Hilcorp Energy Company only | WinklerKeystone (Consolidated) | ActiveOil | 9,000 | Feb 19, 2026 | 2 | Apr 2026 |
| Bashara M. J. -F- #3742-495-03713 | Hilcorp Energy Company only | WinklerKeystone South | Shut inOil | 7,870 | Sep 17, 2019 | 1 | Nov 1997 |
| McCutchen W.A. #542-495-04122 | Hilcorp Energy Company only | WinklerKeystone South | Shut inOil | 9,920 | Jul 12, 2019 | 1 | Apr 2026 |
| Jenkins B. F. #1042-495-03738 | Hilcorp Energy Company only | WinklerKeystone South | Shut inOil | 8,125 | May 17, 2019 | 1 | Oct 2023 |
| Walton J. B. #1842-495-03894 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 9,948 | Jul 27, 2016 | 3 | Mar 2026 |
| Jenkins B.F. #1042-495-00573 | Formentera Operations LLC only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 10,122 | Sep 30, 2011 | 1 | Apr 2026 |
| Walton J.B. a #542-495-04572 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 10,011 | Aug 24, 2011 | 1 | Jan 2025 |
| Walton J.B. a #842-495-04483 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 10,044 | Mar 17, 2011 | 2 | Jan 2025 |
| Walton J.B. a #742-495-04556 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | ActiveGas | 10,004 | Mar 15, 2011 | 1 | Jan 2025 |
| Waddell #18942-495-01339 | Formentera Operations LLC only | WinklerKeystone (San Andres) | Shut inOil | 8,223 | Dec 11, 2006 | 1 | Apr 2026 |
| Keystone-Jenkins #642-495-03773 | United Oil & Shale LLC only | WinklerKeystone (Colby) | Shut inOil | 8,560 | May 7, 2002 | 1 | Sep 2024 |
| Keystone Cattle Company #605 F42-495-32863 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Dev-McKee Cons) | ActiveGas | 9,083 | May 30, 2001 | 1 | Nov 2025 |
| Jenkins B.F. Etal #142-495-01839 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | PluggedOil | 9,350 | Sep 20, 1999 | 1 | Jul 2022 |
| Keystone Silurian Unit #3142-495-04126 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | PluggedOil | 7,730 | Feb 5, 1998 | 1 | Apr 2026 |
| Keystone Silurian Unit #3742-495-04128 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 8,500 | Jan 2, 1998 | 1 | Apr 2026 |
| Jenkins #142-495-03439 | Fulfer Oil and Cattle Co. only | WinklerKeystone (San Andres) | ActiveOil | 8,223 | Sep 24, 1993 | 1 | Apr 2026 |
| Jenkins B.F. Etal #242-495-01840 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 9,999 | Sep 21, 1993 | 1 | Jul 2022 |
| Lavender #142-495-03445 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 10,074 | May 20, 1993 | 1 | Jul 2025 |
| Walton J. B. #1742-495-03893 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 9,893 | Dec 18, 1990 | 2 | Mar 2026 |
| Bashara M.J. #842-495-03839 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 9,940 | Sep 26, 1985 | 1 | Apr 2026 |
| Bashara M. J. -B- #1942-495-03726 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 9,019 | Sep 10, 1984 | 1 | Apr 2026 |
| Keystone -4- #142-495-31759 | BCP Resources LLC only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 9,100 | May 7, 1984 | 1 | Apr 2026 |
| Bashara M. J. -B- #2142-495-03817 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 9,905 | Mar 9, 1984 | 1 | Apr 2026 |
| Jenkins Ben Etal -a- #1142-495-03739 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 8,914 | Dec 12, 1983 | 1 | Apr 2026 |
| Walton J. B. #19 D42-495-03895 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | ActiveGas | 9,900 | Jun 23, 1983 | 2 | Apr 2026 |
| Keystone Silurian Unit #2042-495-01150 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | PluggedOil | 9,749 | Dec 30, 1980 | 1 | Apr 2026 |
| Bashara M.J. #25S42-495-03718 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | PluggedOil | 9,925 | Oct 24, 1980 | 1 | Apr 2026 |
| Jenkins #442-495-03441 | Fulfer Oil and Cattle Co. only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 8,040 | Apr 28, 1980 | 1 | Apr 2026 |
| Keystone Cattle Co. #142-495-00353 | BCP Resources LLC only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 8,500 | — | 0 | — |
| Keystone Cattle Co. #242-495-00354 | BCP Resources LLC only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 8,500 | — | 0 | — |
| Pure-Walton #11 M42-495-00439 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Temporarily abandonedGas | 9,510 | — | 0 | — |
| Jenkins B.F. #1342-495-00578 | Formentera Operations LLC only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 8,879 | — | 0 | — |
| Keystone Silurian Unit #1542-495-01148 | XTO Energy Inc. only | WinklerKeystone (Silurian) | PluggedOil | — | — | 0 | — |
| Keystone Silurian Unit #5242-495-01163 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 8,040 | — | 0 | — |
| Keystone Silurian Unit #5342-495-01189 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 8,040 | — | 0 | — |
| Keystone Silurian Unit #4542-495-01242 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 8,500 | — | 0 | — |
| Keystone Silurian Unit #5142-495-01259 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 9,928 | — | 0 | — |
| Waddell #109W42-495-01263 | Formentera Operations LLC only | WinklerKeystone (Dev-McKee Cons) | PluggedOil | — | — | 0 | — |
| Keystone Silurian Unit #2342-495-01269 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 8,500 | — | 0 | — |
| Keystone Silurian Unit #1742-495-01270 | XTO Energy Inc. only | WinklerKeystone (Silurian) | PluggedOil | — | — | 0 | — |
| Keystone Silurian Unit #3442-495-01272 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 8,500 | — | 0 | — |
| Keystone Silurian Unit #6W42-495-01280 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | PluggedOil | — | — | 0 | — |
| Keystone Silurian Unit #2242-495-01281 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 8,500 | — | 0 | — |
| Keystone Silurian Unit #3942-495-01291 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 8,500 | — | 0 | — |
| Keystone Silurian Unit #21W42-495-01301 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 7,716 | — | 0 | — |
| Waddell #18242-495-01334 | Formentera Operations LLC only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 8,040 | — | 0 | — |
| Waddell #199D42-495-01348 | Formentera Operations LLC only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 8,040 | — | 0 | — |
| Waddell #201W42-495-01350 | Formentera Operations LLC only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 8,205 | — | 0 | — |
| Jenkins B.F. Etal #542-495-01843 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 8,456 | — | 0 | — |