| University/Energen Grayburg Unit O-10-37100 | Libertad Operating LLC only | Block 2 (Grayburg) | Andrews | 33 | 919K | 0 | Jul 2003 – Mar 2026 |
| S.T. 23-L N/2 SW/4 G-3-246589 | Llog Exploration Texas, L.P. only | Block 23L (LH-13) | High IS-LB | 1 | 735K | 9.61M | Apr 2008 – Mar 2013 |
| State Lease 60729 O-3-9726 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-a, HC) | High IS-LB | 2 | 430K | 284K | Jan 1993 – Apr 2008 |
| State Lease 60729 O-3-20448 | Jefferson Block 24 Oil & Gas LLC only | High Island Blk. 24-L (FB-a, HF) | High IS-LB | 1 | 397K | 258K | Jan 1993 – Jun 2016 |
| University O-10-35931 | Energen Resources Corporation only | Block 2 (Grayburg) | Andrews | 4 | 382K | 0 | Nov 1998 – Jun 2003 |
| University "20-11A" O-10-37830 | Apache Corporation only | Block 20 (Bone Spring) | Winkler | 2 | 339K | 371K | Sep 2006 – Apr 2026 |
| Fee -J- O-10-12602 | Fasken Oil and Ranch, Ltd. only | Block 2 (Grayburg) | Andrews | 9 | 284K | 15.3K | Jan 1993 – Apr 2026 |
| University "20-12A" O-10-38952 | Apache Corporation only | Block 20 (Bone Spring) | Winkler | 1 | 234K | 159K | Sep 2005 – Apr 2026 |
| Ring University O-10-13698 | Energen Resources Corporation only | Block 2 (Grayburg) | Andrews | 5 | 194K | 18 | Jan 1993 – Jun 2003 |
| Fasken/Energen Grayburg Unit O-10-37101 | Libertad Operating LLC only | Block 2 (Grayburg) | Andrews | 15 | 183K | 0 | Apr 2003 – Mar 2026 |
| Block 2-3-15 O-13-5057 | Seneca Exploration, LLC only | Wichita County Regular | Wichita | 88 | 169K | 19 | Jan 1993 – Mar 2026 |
| State Lease 59455 O-3-9707 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L(FB-C, CM-11) | High IS-LB | 1 | 156K | 136K | Jan 1993 – Sep 2001 |
| State Lease 59455 O-3-9695 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-C, GL) | High IS-LB | 3 | 145K | 333K | Jan 1993 – Apr 2001 |
| State Lease 103389 O-3-25415 | Jefferson Block 24 Oil & Gas LLC only | High Is.blk. 24-L (HD SD) | High IS-LB | 1 | 124K | 184K | Jul 2009 – Sep 2015 |
| High Island 24L SL 59455 O-3-23388 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-DD, HF) | High IS-LB | 2 | 99.2K | 610K | Nov 1997 – Apr 2009 |
| Atlantic-Univ. O-10-12251 | Energen Resources Corporation only | Block 2 (Grayburg) | Andrews | 7 | 92.7K | 1.58K | Jan 1993 – Jun 2003 |
| Fasken BLK -EE- O-10-30451 | Energen Resources Corporation only | Block 2 (Grayburg) | Andrews | 6 | 89.7K | 21 | Jan 1993 – Mar 2003 |
| Univ. 20-12 O-10-34773 | Wyco Oil & Gas LLC only | Block 20 (Wolfcamp) | Winkler | 1 | 81.7K | 79.2K | Nov 1995 – Jan 2017 |
| University "20-13A" O-10-38369 | Apache Corporation only | Block 20 (Bone Spring) | Winkler | 1 | 69.6K | 38.6K | May 2007 – May 2024 |
| University 20-11 O-10-33731 | O'Neill Properties, Ltd. only | Block 20 (Wolfcamp) | Winkler | 1 | 66.6K | 37.4K | Feb 1993 – Sep 2003 |
| University "20-14" A O-10-37791 | OXY USA Inc. only | Block 21 NW (Wolfcamp) | Winkler | 1 | 58.4K | 97.7K | Oct 2005 – Feb 2017 |
| State Lease 59454 O-3-20820 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-DD, HC) | High IS-LB | 1 | 56.6K | 191K | May 1993 – Jun 2016 |
| High Island 24-L, N/2, NW/4 O-3-26021 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L(FB-C, CM-11) | High IS-LB | 1 | 49.5K | 65.9K | Aug 2012 – Jun 2016 |
| High Island 24L SL 59455 G-3-250676 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-DD, HF) | High IS-LB | 1 | 46.8K | 812K | May 2009 – Mar 2013 |
| High Island 24L SL59456 O-3-23759 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-E, HC) | High IS-LB | 1 | 42.1K | 141K | Nov 1999 – Jun 2016 |
| High Island 24L SL 59455 O-3-26154 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-DD, HF) | High IS-LB | 1 | 38.5K | 69.5K | Oct 2013 – Jun 2016 |
| University 20-2 O-10-35191 | Pogo Producing Company only | Block 20 (Cherry Canyon) | Winkler | 1 | 28.9K | 9.2K | Dec 1996 – Jan 2001 |
| Galveston Block 278-L(mf-106411) G-3-226926 | Hall-Houston Expl. II, L.P. only | Galveston 278-L (Miocene Cons.) | Galveston-LB | 1 | 25.4K | 1.69M | Jul 2007 – Dec 2008 |
| HI 22-L (TX S/L M-95936) G-3-153779 | Global Natural Resources Corp. only | Block 23-L(lh-10) | High IS-LB | 1 | 22.5K | 2.35M | Apr 1995 – May 1996 |
| University 20-11 O-10-35497 | OXY USA Inc. only | Block 20 (Delaware Cons.) | Winkler | 1 | 19.6K | 15.4K | Apr 1997 – Nov 2012 |
| High Island 24-L, N/2, NW/4 G-3-244703 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24-L (FJ Sand) | High IS-LB | 1 | 18.9K | 1.17M | Aug 2008 – Jul 2012 |
| State Lease 59454 G-3-133033 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-D, HC) | High IS-LB | 1 | 18K | 1.55M | Jan 1993 – Jul 2015 |
| University 20-2 O-10-35485 | OXY USA Inc. only | Block 20 (Delaware Cons.) | Winkler | 1 | 14.7K | 26.7K | Apr 1997 – Sep 2009 |
| University "13-A" O-10-36289 | Energen Resources Corporation only | Block 2 (Grayburg) | Andrews | 2 | 13.9K | 0 | Mar 2000 – Jun 2003 |
| Boyd 28 O-10-36058 | Ocean Energy, Inc. only | Block 21 NW (Wolfcamp) | Winkler | 1 | 13.3K | 9 | Jul 1999 – Jul 2000 |
| S.T. 218-L S/2 SE/4 G-3-229316 | Apex Oil & Gas, Inc. only | Galveston Block 218-L (Rob M-1) | Galveston-LB | 1 | 13.1K | 2.29M | Jun 2006 – Nov 2008 |
| University 20-11 O-10-34907 | OXY USA Inc. only | Block 20 (Wolfcamp) | Winkler | 1 | 11K | 9.24K | Apr 1996 – Mar 1997 |
| High Island 24L (SL59455) G-3-150773 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-B, GP) | High IS-LB | 1 | 6.64K | 622K | Jun 1994 – Jan 1995 |
| Durelle O-10-36208 | Formentera Operations LLC only | Block 27 (Tubb) | Crane | 3 | 6.13K | 29.3K | Nov 1999 – Apr 2020 |
| High Island 24L SL59456 G-3-167568 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-E, HF) | High IS-LB | 1 | 5.98K | 690K | Feb 1998 – Mar 1999 |
| High Island 24L SL59456 G-3-180132 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-E, JG) | High IS-LB | 1 | 5.89K | 838K | May 2000 – Apr 2003 |
| Lone Star Block 29 O-13-19412 | Goodner, Rob Oil Interest only | Clay County Regular | Clay | 7 | 5.71K | 20 | Jan 1993 – Mar 2012 |
| University 20-12 O-10-35069 | Lonesome B, LLC only | Block 20 (Bone Spring) | Winkler | 2 | 5.7K | 7.59K | Aug 1996 – Apr 1997 |
| State Lease 59455 G-3-138259 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-C, GK) | High IS-LB | 1 | 3.72K | 3.9M | Jan 1993 – May 1998 |
| State Lease 59455 G-3-47122 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-C, HC) | High IS-LB | 1 | 3.72K | 3.08M | Jan 1993 – Jun 2016 |
| University 20-1 O-10-36779 | Brown, H.L. Operating, L.L.C. only | Block 20 (Bone Spring) | Winkler | 1 | 3.72K | 2.51K | Oct 2001 – Feb 2003 |
| S/L 59455, High Island 24L G-3-138911 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-C, HC) | High IS-LB | 1 | 2.76K | 4.06M | Jan 1993 – Jun 2016 |
| S.T. 218-L S/2 SE/4 G-3-246824 | Hall-Houston Expl. III, L.P. only | Galveston Block 218-L (RL-5SAND) | Galveston-LB | 1 | 2.71K | 653K | Nov 2008 – Mar 2010 |
| Wight, A. W. G-10-166519 | Contango Resources, LLC only | Block 27 (Tubb) | Crane | 1 | 2.62K | 152K | Nov 1997 – Sep 2012 |
| High Island 24L SL 59455 G-3-174818 | Jefferson Block 24 Oil & Gas LLC only | High Is. Blk. 24L (FB-C, GK) | High IS-LB | 1 | 2.58K | 2.84K | Oct 2007 – Mar 2008 |