| West Hasting Unit O-3-19054 | Denbury Onshore, LLC only | Hastings, West | Brazoria | 566 | 45M | 14.1M | Jan 1993 – Apr 2026 |
| North Westbrook Unit O-10-20831 | Bce-Mach III LLC only | Westbrook | Mitchell | 1,146 | 26.2M | 1.81M | Jan 1993 – Apr 2026 |
| West RKM Unit O-11-19691 | Occidental Permian EOR, LLC only | Slaughter | Hockley | 304 | 23M | 10.9M | Jan 1993 – Apr 2026 |
| West Welch Unit O-11-14783 | OXY USA WTP EOR, LLC only | Welch | Dawson | 687 | 20.4M | 7.45M | Jan 1993 – Apr 2026 |
| West Seminole SA Unit O-11-17310 | OXY USA WTP LP only | Seminole, West | Gaines | 226 | 18.2M | 55.7M | Jan 1993 – Apr 2026 |
| Westbrook Southeast Unit O-10-20847 | Bce-Mach III LLC only | Westbrook | Mitchell | 632 | 17.5M | 969K | Jan 1993 – Apr 2026 |
| Briscoe Cochina West Ranch O-1-15234 | Javelin Energy Partners Mgmt LLC only | Briscoe Ranch (Eagleford) | Dimmit | 80 | 15.8M | 43.4M | Jun 2010 – Apr 2026 |
| West Levelland Unit O-11-60190 | Hilcorp Energy Company only | Levelland | Cochran | 361 | 14.1M | 3.22M | Jan 1993 – Apr 2026 |
| Northwest Mallet Unit O-11-18246 | Occidental Permian EOR, LLC only | Slaughter | Hockley | 179 | 12.9M | 6.64M | Jan 1993 – Apr 2026 |
| West Fuhrman-Mascho Unit O-10-21220 | Bce-Mach III LLC only | Fuhrman-Mascho | Andrews | 565 | 12.7M | 15.2M | Jan 1993 – Apr 2026 |
| Irvin West O-1-17695 | Javelin Energy Partners Mgmt LLC only | Eagleville (Eagle Ford-1) | La Salle | 75 | 12M | 15.1M | Jul 2013 – Mar 2026 |
| West Ranch (41-a/98-a Cons) Unit O-2-11296 | Hilcorp Energy Company only | West Ranch (41-a & 98-a Cons.) | Jackson | 253 | 9.11M | 7.69K | Jul 2016 – Apr 2026 |
| Westbrook Southwest Unit O-10-21120 | Grayrock Energy II, LLC only | Westbrook | Mitchell | 371 | 8.65M | 21 | Jan 1993 – Apr 2026 |
| West JO-Mill Unit O-11-61062 | JO Mill Oil Company LLC only | JO-Mill (Spraberry) | Borden | 103 | 7.68M | 2.74M | Jan 1993 – Apr 2026 |
| West Sundown Unit O-11-70442 | OXY USA EOR, LLC only | Slaughter | Hockley | 240 | 6.39M | 4.65M | May 2016 – Apr 2026 |
| West Brahaney Unit O-11-19640 | Burk Royalty Co., Ltd. only | Brahaney | Yoakum | 247 | 6.05M | 2.56M | Jan 1993 – Apr 2026 |
| West Ranch -A- O-2-1656 | Hilcorp Energy Company only | West Ranch (Greta) | Jackson | 287 | 6M | 5.64M | Jan 1993 – Apr 2026 |
| Kma Waterflood-Southwest Unit O-13-10267 | Stephens & Johnson Operating Co. only | K-M-A | Wichita | 160 | 5.27M | 19 | Jan 1993 – Apr 2026 |
| Prentice Southwest Unit O-11-60367 | Occidental Permian Ltd. only | Prentice (6700) | Yoakum | 124 | 5.14M | 1.94M | Jan 1993 – Apr 2026 |
| Huntley South Unit O-11-64383 | Southwest Royalties, Inc. only | Huntley (3400) | Garza | 55 | 4.74M | 641K | Jan 1993 – Apr 2026 |
| Blackfoot West Unit O-10-50000 | Diamondback E&P LLC only | Spraberry (Trend Area) | Midland | 11 | 4.53M | 14.1M | Aug 2017 – Apr 2026 |
| West Spraberry Unit O-11-67167 | JO Mill Oil Company LLC only | Spraberry, W. (Deep, Spraberry) | Dawson | 59 | 4.13M | 808K | Dec 1993 – Apr 2026 |
| Vandenberg West 12-24 Unit O-10-57510 | Diamondback E&P LLC only | Spraberry (Trend Area) | Martin | 12 | 4.13M | 7.17M | Aug 2022 – Apr 2026 |
| Koonce West 46-34 Unit 1 O-10-58168 | Diamondback E&P LLC only | Spraberry (Trend Area) | Glasscock | 11 | 4.05M | 12.8M | Sep 2022 – Apr 2026 |
| Talco West Unit O-6-15028 | J.P. Oil Company, Inc. only | Talco | Franklin | 247 | 3.99M | 0 | Jul 2011 – Mar 2026 |
| Bowman West O-1-17472 | Javelin Energy Partners Mgmt LLC only | Eagleville (Eagle Ford-1) | Atascosa | 24 | 3.85M | 3.71M | Mar 2014 – Mar 2026 |
| Dickenson 7-18 West O-10-56101 | Diamondback E&P LLC only | Spraberry (Trend Area) | Martin | 10 | 3.76M | 8.86M | Aug 2021 – Apr 2026 |
| N. Huntley Unit O-11-65672 | Southwest Royalties, Inc. only | Huntley (3400) | Garza | 68 | 3.75M | 934K | Jan 1993 – Apr 2026 |
| Southwest Nena Lucia Unit O-8-8844 | Citation Oil & Gas Corp. only | Nena Lucia (Strawn Reef) | Nolan | 148 | 3.44M | 17.3M | Jan 1993 – Apr 2026 |
| T Y Ranch West O-10-59176 | Diamondback E&P LLC only | Spraberry (Trend Area) | Martin | 18 | 3.37M | 6.16M | Oct 2022 – Apr 2026 |
| Cowden 39-03 West Unit O-10-61552 | XTO Energy Inc. only | Spraberry (Trend Area) | Midland | 9 | 3.33M | 8.9M | Oct 2023 – Apr 2026 |
| West City of Post SA Unit "A" O-11-62303 | Brown, Geo. R Partnership,lp,the only | Garza | Garza | 80 | 3.14M | 638K | Jan 1993 – Apr 2026 |
| Willamar West Unit O-4-3391 | Citation Oil & Gas Corp. only | Willamar, West | Willacy | 207 | 3.02M | 3.17M | Jan 1993 – Apr 2026 |
| Calamity Jane West O-10-39285 | Noble Energy Inc only | Phantom (Wolfcamp) | Reeves | 12 | 2.94M | 15.7M | Nov 2008 – Apr 2026 |
| West Jordan Unit O-10-21216 | Extex Operating Company only | Jordan | Ector | 139 | 2.93M | 1.36M | Jan 1993 – Apr 2026 |
| Huntley, East (San Andres) Unit O-11-60957 | Southwest Royalties, Inc. only | Huntley, East (San Andres) | Garza | 71 | 2.76M | 324K | Jan 1993 – Apr 2026 |
| Northwest Garza Unit O-11-61053 | RJD Management Co., Inc. only | Garza | Garza | 87 | 2.66M | 3.1M | Jan 1993 – Apr 2026 |
| UL Mason West Unit O-10-49200 | Diamondback E&P LLC only | Spraberry (Trend Area) | Andrews | 11 | 2.59M | 2.47M | Jul 2017 – Apr 2026 |
| Northwest Terry (Abo) Unit O-11-63221 | R3 Operating Corporation only | Kingdom (Abo Reef) | Terry | 46 | 2.53M | 19.8K | Jan 1993 – Apr 2026 |
| Oldham Trust West O-10-49790 | Surge Operating, LLC only | Spraberry (Trend Area) | Howard | 11 | 2.53M | 5.14M | Oct 2017 – Mar 2026 |
| Southwest Andrews Unit O-10-35543 | Morningstar Operating LLC only | Andrews (Wolfcamp-Penn.) | Andrews | 37 | 2.48M | 3.87M | Dec 1997 – Apr 2026 |
| Southwest River Unit O-8-25630 | Kinder Morgan Production Co LLC only | Katz | Stonewall | 50 | 2.35M | 329K | Jan 1993 – Oct 2009 |
| Briscoe Catarina West O-1-21285 | Javelin Energy Partners Mgmt LLC only | Briscoe Ranch (Eagleford) | Dimmit | 9 | 2.29M | 10.3M | Dec 2023 – Apr 2026 |
| West Brantley Jackson SM. Unit O-5-1949 | Sulphur River Exploration, Inc. only | Brantley Jackson, W (Smackover) | Hopkins | 13 | 2.26M | 1.9M | Jan 1993 – Apr 2026 |
| Southwest Garza Unit O-11-61155 | Brown, Geo. R Partnership,lp,the only | Garza | Garza | 68 | 2.17M | 349K | Jan 1993 – Apr 2026 |
| West Broadview Unit O-11-67645 | Cross Timbers Energy, LLC only | Broadview, West (Clear Fork) | Lubbock | 24 | 2.15M | 287K | Dec 1996 – Apr 2026 |
| Janey 24-25 West State Unit O-10-52679 | Permian Resources Operating, LLC only | Wolfbone (Trend Area) | Reeves | 4 | 2.11M | 3.87M | May 2019 – Apr 2026 |
| Wellman West Unit O-11-64619 | White Rock Oil & Gas, LLC only | Wellman, W. (San Andres) | Terry | 45 | 2.04M | 460K | Jan 1993 – Mar 2026 |
| Grantham West 50-48 Unit O-10-61041 | Diamondback E&P LLC only | Spraberry (Trend Area) | Martin | 12 | 2.03M | 6.29M | Apr 2024 – Apr 2026 |
| Guajillo West O-1-19097 | Marathon Oil EF LLC only | Eagleville (Eagle Ford-1) | Atascosa | 9 | 2.03M | 4.29M | Jul 2017 – Apr 2026 |