| McKaskle-Stewart Unit #1HZ42-329-34169 | Diamondback E&P LLC only | MidlandBryant -G- (Devonian) | ActiveOil | 12,012 | May 28, 1999 | 1 | Apr 2026 |
| Ernest #542-495-03437 | Great Western Drilling Company only | WinklerKermit (McKee) | PluggedGas | 10,500 | May 27, 1999 | 1 | May 2002 |
| Campbell Seth #142-495-05779 | Great Western Drilling Company only | WinklerKermit (McKee) | PluggedOil | 10,500 | May 27, 1999 | 1 | Feb 2006 |
| Tippett June 7 #1HZ42-329-31193 | Apache Corporation only | MidlandPegasus (Pennsylvanian) | PluggedOil | 13,500 | May 25, 1999 | 3 | Mar 2013 |
| Block 31 Unit #h 642-103-32310 | OXY USA EOR LLC only | CraneBlock 31 (Devonian) | Shut inOil | 9,060 | May 19, 1999 | 2 | Apr 2026 |
| Perkins #242-003-37742 | Nadel and Gussman Permian L.L.C. only | AndrewsDeep Rock (Devonian) | PluggedOil | 12,600 | May 17, 1999 | 3 | May 2012 |
| Block 31 Unit #y 542-103-30795 | OXY USA EOR LLC only | CraneBlock 31 (Devonian) | ActiveOil | 9,125 | May 14, 1999 | 1 | Apr 2026 |
| Parks Field Unit No. 2 #2324HHZ42-329-33366 | XTO Energy Inc. only | MidlandParks (Devonian) | ActiveGas | 15,787 | May 14, 1999 | 2 | Apr 2026 |
| Tippett June #75HZ42-329-34167 | Apache Corporation only | MidlandPegasus (Devonian) | PluggedGas | 12,000 | May 13, 1999 | 1 | Dec 2017 |
| East 22 Unit #642-495-03879 | Hilcorp Energy Company only | WinklerHalley (Devonian) | Temporarily abandonedGas | 10,662 | May 6, 1999 | 1 | Apr 2011 |
| Amacker V. T. 106 #542-461-04266 | Civitas Permian Operating LLC only | UptonAmacker-Tippett (Ellenburger) | Shut inOil | 12,250 | Apr 26, 1999 | 1 | Nov 2010 |
| Texu N #242-003-00421 | Wind River Energy Inc. only | AndrewsBlock 12 (Yates) | PluggedGas | 10,954 | Apr 23, 1999 | 1 | Jan 2003 |
| University -B- #242-003-05166 | Citation Oil & Gas Corp. only | AndrewsAndrews South (Wolfcamp) | PluggedOil | 5,750 | Apr 22, 1999 | 1 | Jul 2003 |
| Hoelscher F. J. B #242-173-31842 | R2Q Operating LLC only | GlasscockFrysak Farms (Devonian) | ActiveGas | 10,572 | Apr 22, 1999 | 2 | Mar 2026 |
| Wristen Brothers #142-475-34425 | Williams Oil Company only | WardDell (San Andres) | PluggedOil | 6,500 | Apr 22, 1999 | 2 | Dec 2021 |
| Cooper 43 #1-U42-475-30531 | XTO Energy Inc. only | WardBlock 16 (Montoya) | ActiveGas | 16,590 | Apr 9, 1999 | 1 | Apr 2026 |
| Pegasus Field Unit #3 #290142-461-03316 | XTO Energy Inc. only | UptonPegasus (Devonian) | ActiveGas | 13,140 | Apr 5, 1999 | 2 | Jan 2026 |
| Tippett June #43HZ42-329-30807 | Apache Corporation only | MidlandPegasus (Devonian) | ActiveGas | 12,550 | Mar 31, 1999 | 4 | Jul 1993 |
| Pegasus Field Unit #3 #1316HHZ42-461-33369 | XTO Energy Inc. only | UptonPegasus (Devonian) | ActiveGas | 12,399 | Mar 31, 1999 | 3 | — |
| Antina Cattle Co. #142-103-34682 | — | CraneSand Hills, West (Devonian) | Plugged | 6,800 | Mar 29, 1999 | 1 | — |
| McIntosh 22 #1HZ42-329-34166 | Diamondback E&P LLC only | MidlandBryant -G- (Devonian) | ActiveGas | 12,197 | Mar 29, 1999 | 1 | Mar 2026 |
| Texaco 15 #1S42-475-34591 | Goodnight Midstream Permian LLC only | WardMarston Ranch (Devonian) | PluggedOil | 7,500 | Mar 26, 1999 | 1 | Dec 2021 |
| Goldsmith C. A. Etal #96042-135-01329 | Hilcorp Energy Company only | EctorGoldsmith (Clear Fork) | Shut inOil | 9,550 | Mar 23, 1999 | 1 | Apr 2026 |
| U-Texas #36995-a/C 2 #4R42-003-03791 | Fasken Oil and Ranch Ltd. only | AndrewsMagutex (Devonian) | ActiveOil | 13,848 | Mar 22, 1999 | 3 | Apr 2026 |
| Bryant G Devonian Unit #35HHZ42-329-33530 | Chevron U. S. A. Inc. only | MidlandBryant -G- (Devonian) | Temporarily abandonedGas | 15,777 | Mar 18, 1999 | 2 | Apr 2019 |
| Headlee Devonian Unit #6742-135-06593 | Chevron U. S. A. Inc. only | EctorHeadlee (Devonian) | PluggedGas | 13,172 | Mar 17, 1999 | 1 | May 1998 |
| W. C. Tyrrell Unit No. 2 #242-371-36902 | Chevron Midcontinent L.P. only | PecosGomez (Devonian) | ActiveGas | 18,862 | Mar 17, 1999 | 1 | Apr 2026 |
| Lindsey Dewayne #342-461-32219 | Diamondback E&P LLC only | UptonCorbett (Devonian) | ActiveOil | 10,743 | Mar 15, 1999 | 2 | Apr 2026 |
| Windham R. S. #242-461-01488 | XTO Energy Inc. only | UptonAmacker-Tippett (Devonian) | ActiveGas | 12,170 | Mar 3, 1999 | 3 | Jul 2022 |
| State University W #142-003-02557 | Fasken Oil and Ranch Ltd. only | AndrewsMagutex (Strawn) | PluggedOil | 13,910 | Feb 26, 1999 | 1 | Aug 2016 |
| Parks Field Unit No. 2 #1918HHZ42-329-31320 | XTO Energy Inc. only | MidlandParks (Devonian) | PluggedGas | 12,800 | Feb 22, 1999 | 4 | Apr 2026 |
| Spinks #1HHZ42-329-34155 | Burleson Petroleum Inc. only | MidlandAzalea (Devonian) | PluggedOil | 12,000 | Feb 11, 1999 | 1 | Sep 2009 |
| Franklin Jim #142-329-00003 | Pioneer Natural Res. USA Inc. only | MidlandSpraberry (Trend Area) | ActiveOil | 11,440 | Feb 10, 1999 | 2 | Apr 2026 |
| 7286 JV-S Wedge Gas Unit #242-475-30742 | Halcon Operating Co. Inc. only | WardBeall (Devonian) | ActiveGas | 15,940 | Feb 9, 1999 | 1 | Mar 2026 |
| P.B.M. Unit #242-371-36898 | Union Oil Company of California only | PecosGomez (Devonian) | Not on schedule | 17,200 | Feb 8, 1999 | 2 | — |
| Sealy Smith Foundation -a- #3542-495-03387 | Hilcorp Energy Company only | WinklerMonahans North (Clearfork) | PluggedOil | 12,569 | Feb 4, 1999 | 2 | Apr 2026 |
| Parks Field Unit No. 2 #1917HHZ42-329-31275 | XTO Energy Inc. only | MidlandParks (Devonian) | Temporarily abandonedGas | 12,645 | Feb 3, 1999 | 2 | Apr 2026 |
| Walker B S #1242-003-02617 | Hilcorp Energy Company only | AndrewsFuhrman (Glorieta) | Shut inOil | 10,089 | Jan 22, 1999 | 2 | Apr 2026 |
| University -25- #442-103-33462 | Chaparral Energy L.L.C. only | CraneJ. Cleo Thompson (Detrital) | PluggedGas | 11,400 | Jan 22, 1999 | 3 | Jun 2024 |
| Pegasus Field Unit #3 #1719HZ42-461-32372 | XTO Energy Inc. only | UptonPegasus (Devonian) | ActiveGas | 14,172 | Jan 19, 1999 | 6 | Apr 2026 |
| Tippett June 7 #3HZ42-329-31482 | Apache Corporation only | MidlandPegasus (Devonian) | PluggedGas | 13,500 | Jan 15, 1999 | 3 | Jun 2020 |
| Wolcott B #1R42-317-31560 | Crossfoot Operating LLC only | MartinAnchor Ranch (Devonian) | Shut inOil | 12,216 | Jan 14, 1999 | 2 | Jul 2011 |
| Mitchell-Thomas Unit 1 #2E42-371-04414 | XTO Energy Inc. only | PecosPuckett (Ellenburger) | PluggedGas | 15,600 | Jan 11, 1999 | 1 | Jul 2019 |
| Sealy Smith Foundation -a- #2042-495-05277 | Hilcorp Energy Company only | WinklerMonahans North (Clearfork) | ActiveOil | 13,200 | Jan 11, 1999 | 3 | Apr 2026 |
| Tippett June 7 #5HZ42-329-34139 | Apache Corporation only | MidlandPegasus (Devonian) | PluggedGas | 12,000 | Jan 8, 1999 | 1 | Oct 2022 |
| Block 31 Unit #h 4H42-103-30259 | Hilcorp Energy Company only | CraneBlock 31 (Queen) | ActiveGas | 9,350 | Dec 30, 1998 | 2 | Apr 2026 |
| Noelke #142-443-30025 | Cimarex Energy Co. of Colorado only | TerrellYucca Butte W. (Ellen) | PluggedOil | 10,400 | Dec 28, 1998 | 4 | Jul 2010 |
| Caprito 83 #1HZ42-475-30225 | Abraxas Petroleum Corporation only | WardR.O.C. (Ellen.) | Shut inGas | 17,795 | Dec 18, 1998 | 1 | Jul 2017 |
| Texaco 15 #142-475-34583 | OXY USA Inc. only | WardSand Hills West (Devonian) | Shut inOil | 7,050 | Dec 17, 1998 | 1 | Jan 2016 |
| Bryant G Devonian Unit #20HHZ42-329-33050 | Chevron U. S. A. Inc. only | MidlandBryant -G- (Devonian) | PluggedGas | 16,400 | Dec 10, 1998 | 4 | May 2019 |