| Keystone Cattle Co. #10642-495-01260 | Mineral Technologies Inc. only | WinklerKeystone (Devonian) | Shut inOil | 10,094 | Nov 30, 2012 | 2 | Mar 2019 |
| 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 #842-495-04483 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 10,044 | Mar 17, 2011 | 2 | Jan 2025 |
| Bashara M. J. #3042-495-03723 | Hilcorp Energy Company only | WinklerKeystone (Ellenburger) | Shut inOil | 10,390 | Nov 29, 2010 | 2 | Feb 2020 |
| Keystone Cattle Company #253R42-495-10132 | WTG Exploration only | WinklerKeystone (McKee) | PluggedGas | 11,450 | Oct 7, 2008 | 2 | Apr 2016 |
| Walton J. B. a #442-495-04569 | XTO Energy Inc. only | WinklerKeystone (Ellenburger) | PluggedGas | 9,830 | Apr 23, 2008 | 3 | Jul 2017 |
| Jenkins B.F. et al (Deep) #342-495-01841 | XTO Energy Inc. only | WinklerKeystone (Ellenburger) | PluggedGas | 10,300 | Mar 8, 2005 | 1 | May 2014 |
| Jenkins B.F. Etal #142-495-01839 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | PluggedOil | 9,350 | Sep 20, 1999 | 1 | Jul 2022 |
| Walton J. B. -C- #142-495-03946 | Hilcorp Energy Company only | WinklerKeystone (San Andres) | PluggedOil | 9,825 | Mar 22, 1996 | 1 | Apr 2026 |
| South Keystone /Ellen/ Unit #3004R42-495-04292 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Ellenburger) | Temporarily abandonedGas | 10,219 | Oct 4, 1993 | 1 | Mar 2016 |
| Pure-Walton #9E42-495-00458 | Hilcorp Energy Company only | WinklerKeystone (Ellenburger) | Shut inOil | 10,001 | Jun 2, 1993 | 3 | Apr 2021 |
| Lavender #142-495-03445 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 10,074 | May 20, 1993 | 1 | Jul 2025 |
| Pure-Walton #14E42-495-00456 | Hilcorp Energy Company only | WinklerKeystone (Ellenburger) | Temporarily abandonedGas | 10,000 | Dec 1, 1992 | 1 | Apr 2021 |
| B A S H #742-495-03422 | Hilcorp Energy Company only | WinklerKeystone (Ellenburger) | Shut inOil | 10,030 | Sep 30, 1992 | 2 | Jul 2019 |
| Pure-Walton #5E42-495-00412 | Hilcorp Energy Company only | WinklerKeystone (Ellenburger) | Temporarily abandonedGas | 9,875 | Sep 25, 1991 | 2 | Dec 2022 |
| Pure-Walton #3E42-495-00414 | Hilcorp Energy Company only | WinklerKeystone (Ellenburger) | Temporarily abandonedGas | 9,878 | Oct 2, 1990 | 1 | Apr 2021 |
| Pure Walton #6 E42-495-00452 | XTO Energy Inc. only | WinklerKeystone (Ellenburger) | PluggedGas | 9,780 | Jul 18, 1990 | 2 | Apr 2021 |
| Crum M. E. #242-495-04233 | Hillin-Simon Oil Company only | WinklerKeystone (Yates) | PluggedGas | 3,500 | Aug 26, 1987 | 1 | Jan 1995 |
| Bashara M.J. #842-495-03839 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Shut inOil | 9,940 | Sep 26, 1985 | 1 | Apr 2026 |
| Crum M. E. -B- #242-495-04236 | XTO Energy Inc. only | WinklerKeystone (Consolidated) | PluggedOil | 9,914 | May 13, 1985 | 1 | — |
| Bashara M. J. -B- #2142-495-03817 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | ActiveOil | 9,905 | Mar 9, 1984 | 1 | Apr 2026 |
| Keystone Cattle Co. #77 C42-495-01157 | Gulf Oil Corp. only | WinklerKeystone (McKee) | PluggedGas | 10,007 | Feb 13, 1984 | 2 | — |
| 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 |
| East Keystone (San a Holt Unit) #70142-495-05217 | Formentera Operations LLC only | WinklerKeystone (Consolidated) | Shut inOil | 10,041 | Oct 29, 1982 | 3 | Apr 2026 |
| Pure Walton #8E42-495-00454 | Hilcorp Energy Company only | WinklerKeystone (Ellenburger) | ActiveGas | 9,724 | — | 0 | — |
| South Keystone /Ellen/ Unit #106542-495-01145 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Ellenburger) | ActiveGas | 9,909 | — | 0 | — |
| 10742-495-01261 | Gulf Oil Corp. only | WinklerKeystone (McKee) | PluggedGas | — | — | 0 | — |
| Keystone Cattle Co. #129 C42-495-01283 | Devon Energy Production Co L.P. only | WinklerKeystone (McKee) | PluggedGas | — | — | 0 | — |
| Keystone Cattle Co. #130 C42-495-01284 | Devon Energy Production Co L.P. only | WinklerKeystone (McKee) | PluggedGas | — | — | 0 | — |
| Keystone Silurian Unit #4242-495-02256 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | PluggedOil | — | — | 0 | — |
| Crum #242-495-03429 | Phillips Petroleum Company only | WinklerKeystone (McKee) | Not on scheduleGas | — | — | 0 | — |
| South Keystone /Ellen/ Unit #600242-495-03467 | Basin Oil & Gas Operating LLC only | WinklerKeystone (Ellenburger) | PluggedOil | — | — | 0 | — |
| Pogo Walton B #442-495-03478 | Hilcorp Energy Company only | WinklerKeystone (Ellenburger) | Temporarily abandonedGas | 9,714 | — | 0 | — |
| 39 M42-495-03699 | Bass Perry R. only | WinklerKeystone (McKee) | Not on scheduleGas | — | — | 0 | — |
| 43 D42-495-03702 | Bass Perry R. only | WinklerKeystone (McKee) | Not on scheduleGas | — | — | 0 | — |
| Bashara M.J. #2242-495-03715 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | PluggedOil | — | — | 0 | — |
| 29 M42-495-03722 | Bass Perry R. only | WinklerKeystone (McKee) | Not on scheduleGas | — | — | 0 | — |
| 31 M42-495-03724 | Bass Perry R. only | WinklerKeystone (McKee) | Not on scheduleGas | — | — | 0 | — |
| 32 M42-495-03725 | Bass Perry R. only | WinklerKeystone (McKee) | Not on scheduleGas | — | — | 0 | — |
| Jenkins B. F. #9M42-495-03736 | Hilcorp Energy Company only | WinklerKeystone (Dev-McKee Cons) | Temporarily abandonedGas | 9,925 | — | 0 | — |
| Jenkins Ben et al #4 M42-495-03761 | Bass Enterprises Production Co. only | WinklerKeystone (McKee) | PluggedGas | — | — | 0 | — |
| Bashara M. J. #742-495-03850 | Hilcorp Energy Company only | WinklerKeystone (Ellenburger) | Temporarily abandonedGas | 9,900 | — | 0 | — |
| 3 M42-495-03852 | Bass Perry R. only | WinklerKeystone (McKee) | Not on scheduleGas | — | — | 0 | — |
| 2 M42-495-03867 | Bass Perry R. only | WinklerKeystone (McKee) | Not on scheduleGas | — | — | 0 | — |
| Walton J. B. #35 T42-495-03911 | Hilcorp Energy Company only | WinklerKeystone (Ellenburger) | PluggedOil | — | — | 0 | — |
| Walton J. B. #4242-495-03918 | Hilcorp Energy Company only | WinklerKeystone (Ellenburger) | Temporarily abandonedGas | 9,747 | — | 0 | — |
| 61 M42-495-03937 | Bass Perry R. only | WinklerKeystone (McKee) | Not on scheduleGas | — | — | 0 | — |
| South Keystone /Ellen/ Unit #50842-495-04116 | Devon Energy Production Co L.P. only | WinklerKeystone (Ellenburger) | PluggedGas | — | — | 0 | — |
| 1 M42-495-04226 | Bass Enterprises Production Co. only | WinklerKeystone (McKee) | Not on scheduleGas | — | — | 0 | — |
| Crum M. E. -a- #3 M42-495-04230 | Bass Enterprises Production Co. only | WinklerKeystone (McKee) | Not on scheduleGas | — | — | 0 | — |