| Svruc Unit G-5-218074 | Union Oil Company of California | Van (Rodessa) | Van Zandt | 1 | 37.7K | 372K | Apr 2006 – Jan 2020 |
| Montrose O-11-67455 | Union Oil Company of California | Blackwatch (San Andres) | Gaines | 2 | 36.2K | 20.6K | Oct 1995 – Sep 1997 |
| Gilbert, H. C. 43 O-5-3275 | Union Oil Company of California | Van (Austin Chalk) | Van Zandt | 7 | 34.3K | 138K | by Jan 1993 – Jul 2008 |
| Fowler, B. M. 303 O-5-3216 | Union Oil Company of California | Van (Austin Chalk) | Van Zandt | 2 | 33.4K | 65.8K | by Jan 1993 – Nov 2009 |
| Leonard, J. H. 30 O-5-1885 | Union Oil Company of California | Van (Austin Chalk) | Van Zandt | 2 | 32.3K | 102K | by Jan 1993 – Jan 2013 |
| Parker, J. E. -N- O-10-32364 | Union Oil Company of California | Parker (Pennsylvanian) | Andrews | 1 | 32K | 37.2K | by Jan 1993 – Aug 1994 |
| Howell, R. A. 44 O-5-3294 | Union Oil Company of California | Van (Austin Chalk) | Van Zandt | 4 | 31.4K | 152K | by Jan 1993 – Mar 2010 |
| Parker, J. E. O-10-248 | Union Oil Company of California | Andrews (Pennsylvanian) | Andrews | 2 | 30.2K | 47.3K | Nov 1994 – Sep 1995 |
| Freeman, L. V. 208 O-5-1167 | Union Oil Company of California | Van | Van Zandt | 5 | 29.6K | 7.31K | by Jan 1993 – Oct 2013 |
| Craddock O-10-34402 | Union Oil Company of California | Andrews (Pennsylvanian) | Andrews | 2 | 28.8K | 48.8K | Jan 1995 – Sep 1995 |
| Parker, J. E. -AA- O-10-30495 | Union Oil Company of California | Andrews (Pennsylvanian) | Andrews | 1 | 27.9K | 38.8K | by Jan 1993 – Sep 1995 |
| Parker, J. E. -AB- O-10-31511 | Union Oil Company of California | Parker (Wolfcamp) | Andrews | 3 | 26.9K | 47.6K | by Jan 1993 – Aug 1994 |
| State of Texas AG O-10-33954 | Union Oil Company of California | Andrews (Pennsylvanian) | Andrews | 1 | 26.8K | 23.5K | Aug 1993 – Sep 1995 |
| Oliver, J. R., 207 O-5-1927 | Union Oil Company of California | Van (Shallow) | Van Zandt | 2 | 25.9K | 15.1K | by Jan 1993 – May 2012 |
| Cook 42 O-5-3245 | Union Oil Company of California | Van (Austin Chalk) | Van Zandt | 4 | 25.3K | 54.5K | by Jan 1993 – May 2008 |
| Swain, W. F. 9 O-5-3597 | Union Oil Company of California | Van (Upper Carlile) | Van Zandt | 2 | 25.1K | 40.8K | Oct 1997 – Jan 2000 |
| Parker, J. E. -F- O-10-18670 | Union Oil Company of California | Andrews (Pennsylvanian) | Andrews | 2 | 24.5K | 18.8K | Jul 1993 – Sep 1995 |
| York, W. A. 13 O-5-3805 | Union Oil Company of California | Van (Shallow) | Van Zandt | 2 | 24.3K | 18.1K | Apr 2005 – Sep 2015 |
| Brawner -10- O-5-3271 | Union Oil Company of California | Van (Austin Chalk) | Van Zandt | 3 | 24.3K | 92.2K | by Jan 1993 – Sep 2013 |
| Camper, B. W. 110 O-5-3327 | Union Oil Company of California | Van (Austin Chalk) | Van Zandt | 1 | 24.1K | 12.2K | by Jan 1993 – Dec 2007 |
| Parker, J. E. "C" O-10-33506 | Union Oil Company of California | Parker (Pennsylvanian) | Andrews | 1 | 22.9K | 25.5K | by Jan 1993 – Jan 1994 |
| Parker, J.E. -P- O-10-30768 | Union Oil Company of California | Parker (Wolfcamp) | Andrews | 3 | 22.8K | 26.9K | by Jan 1993 – Aug 1994 |
| Peters, R. H. 29 O-5-3276 | Union Oil Company of California | Van (Austin Chalk) | Van Zandt | 3 | 22.6K | 34.4K | by Jan 1993 – Oct 2009 |
| Clark, Frank O-10-34434 | Union Oil Company of California | Andrews (Pennsylvanian) | Andrews | 1 | 21.2K | 36.2K | Jan 1995 – Sep 1995 |
| Arco Fee G-3-143979 | Union Oil Company of California | Felicia Creek (y-6 Sand) | Liberty | 1 | 21.2K | 702K | by Jan 1993 – Aug 1995 |
| Ray, S. R. O-5-3492 | Union Oil Company of California | Van, West (Travis Peak, E) | Van Zandt | 1 | 20.2K | 231K | Oct 1994 – May 1999 |
| Crim, B. E. 15 O-5-3628 | Union Oil Company of California | Van (Rodessa) | Van Zandt | 1 | 20.2K | 72.6K | Apr 1998 – Jan 1999 |
| Parker, J. E. -E- O-10-246 | Union Oil Company of California | Andrews (Pennsylvanian) | Andrews | 3 | 19.8K | 13.7K | Jul 1993 – Nov 1994 |
| Zetka, Josef O-2-3426 | Union Oil Company of California | Ganado, West (4700 Zone) | Jackson | 3 | 19.7K | 38.5K | by Jan 1993 – Feb 1996 |
| Parker, J. E. "U" (Amoco) O-10-33612 | Union Oil Company of California | Parker (Wolfcamp) | Andrews | 1 | 19.5K | 36K | by Jan 1993 – Aug 1994 |
| Parker, J.E. -H- O-10-29638 | Union Oil Company of California | Parker (Wolfcamp) | Andrews | 16 | 19.4K | 16.5K | by Jan 1993 – Aug 1994 |
| Spacek, Frank O-2-7903 | Union Oil Company of California | Ganado, West (5250) | Jackson | 1 | 18.9K | 17.9K | Sep 1993 – Aug 1994 |
| Parker, J. E. -Y- O-10-28222 | Union Oil Company of California | Parker (Pennsylvanian) | Andrews | 4 | 18.6K | 20.2K | by Jan 1993 – Aug 1994 |
| Deford, R. K. O-10-9765 | Union Oil Company of California | Andrews (Wolfcamp) | Andrews | 2 | 18.6K | 37.2K | by Jan 1993 – Sep 1995 |
| Crim, R. C. 28 O-5-3311 | Union Oil Company of California | Van (Austin Chalk) | Van Zandt | 2 | 18.3K | 35.3K | May 1993 – Jun 2009 |
| Crim, J. F. 16 O-5-3643 | Union Oil Company of California | Van (James) | Van Zandt | 2 | 18.3K | 12.4K | May 1998 – Dec 1998 |
| Parker, J. E. -AA- O-10-31930 | Union Oil Company of California | Parker (Pennsylvanian) | Andrews | 3 | 17.3K | 35.1K | by Jan 1993 – Aug 1994 |
| Smith 104 O-5-3248 | Union Oil Company of California | Van (Austin Chalk) | Van Zandt | 2 | 16.9K | 10.9K | by Jan 1993 – Nov 2012 |
| Miller - Conrad O-11-67351 | Union Oil Company of California | Reinecke, S.E. (Canyon Reef) | Borden | 1 | 16.6K | 9.84K | Jan 1995 – Feb 1997 |
| Ford O-10-33124 | Union Oil Company of California | Parker (Wolfcamp) | Andrews | 5 | 16.3K | 40K | by Jan 1993 – Aug 1994 |
| Parker, J. E. -S- O-10-33886 | Union Oil Company of California | Parker (Wolfcamp) | Andrews | 2 | 14.9K | 17.5K | Jul 1993 – Aug 1994 |
| Southeast Van Lewisville Unit O-5-2619 | Union Oil Company of California | Van | Van Zandt | 8 | 14.5K | 8.68K | by Jan 1993 – Oct 2010 |
| Morris, W. E. 601 O-5-3554 | Union Oil Company of California | Van (Austin Chalk) | Van Zandt | 1 | 14.1K | 15.5K | Feb 1997 – Jul 2014 |
| Parker, J. E. -D- O-10-254 | Union Oil Company of California | Andrews (Pennsylvanian) | Andrews | 3 | 14.1K | 11.6K | Mar 1995 – Sep 1995 |
| Parker, J. E. "AD" O-10-34520 | Union Oil Company of California | Andrews (Pennsylvanian) | Andrews | 1 | 13.4K | 14.2K | Jun 1995 – Sep 1995 |
| Mauritz, T.N. O-2-8047 | Union Oil Company of California | Ganado, West (5900) | Jackson | 1 | 13.3K | 29.5K | Jan 1995 – Mar 1996 |
| Parker, J. E. "T" O-10-34544 | Union Oil Company of California | Andrews (Pennsylvanian) | Andrews | 1 | 12.7K | 11.2K | Jun 1995 – Sep 1995 |
| Parker, J. E. "X" O-10-34324 | Union Oil Company of California | Andrews (Pennsylvanian) | Andrews | 1 | 12.7K | 10.3K | Oct 1994 – Sep 1995 |
| J.A. Bracken 35 O-5-3876 | Union Oil Company of California | Van (Central-Woodbine) | Van Zandt | 1 | 12.4K | 0 | Nov 2007 – Nov 2008 |
| Mauritz, T. N. O-2-8203 | Union Oil Company of California | Ganado, West (5400 Zone) | Jackson | 2 | 12.2K | 17.4K | Jul 1996 – Jul 1997 |