| Block, Anna G-4-162572 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 25.1K | 3.62M | Dec 1996 – Sep 2003 |
| Block, Anna G-4-130731 | Columbus Energy, LLC only | Bashara-Hereford (7300) | Webb | 1 | 12.4K | 2.94M | by Jan 1993 – Aug 2026 |
| Block, Anna G-4-63918 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 6.97K | 512K | by Jan 1993 – Aug 2026 |
| Block, Anna G-4-61897 | Columbus Energy, LLC only | Laredo (Lobo) | Webb | 1 | 1.7K | 785K | by Jan 1993 – Aug 2026 |
| Blocker Ranch-State B G-4-93604 | Vaquero Operating only | Gold River, North (Olmos) | Webb | 1 | 1.03K | 421K | by Jan 1993 – Sep 2022 |
| Blocker Ranch-State A G-4-92658 | Vaquero Operating only | Gold River, North (Olmos) | Webb | 1 | 414 | 237K | by Jan 1993 – Sep 2022 |
| Blocker Ranch-State A G-4-198873 | Vaquero Operating only | Gold River, North (Olmos) | Webb | 1 | 255 | 176K | Nov 2003 – Sep 2022 |
| Blocker Ranch 1846 G-4-206936 | Lewis Petro Properties, Inc. only | Gold River, North (Olmos) | Webb | 1 | 204 | 77.9K | Oct 2004 – Sep 2016 |
| Blocker Ranch-State A G-4-215032 | Vaquero Operating only | Gold River, North (Olmos) | Webb | 1 | 129 | 297K | Oct 2005 – Sep 2022 |
| Briscoe Tract 35,BLOCK 3 G-4-91605 | Diamond G Production only | Gold River, North (Olmos) | Webb | 1 | 126 | 179K | by Jan 1993 – Sep 2018 |
| Blocker Ranch #2 G-4-69971 | Lewis Petro Properties, Inc. only | Gold River, North (Olmos) | Webb | 1 | 91 | 234K | by Jan 1993 – Dec 2016 |
| Blocker Ranch-State A G-4-210375 | Vaquero Operating only | Gold River, North (Olmos) | Webb | 1 | 58 | 263K | Apr 2005 – Mar 2023 |
| Briscoe Tract 32 Block 3 G-4-87290 | Diamond G Production only | Gold River, North (Olmos) | Webb | 1 | 46 | 147K | by Jan 1993 – Sep 2019 |
| Blocker Ranch-State B G-4-215035 | Vaquero Operating only | Gold River, North (Olmos) | Webb | 1 | 37 | 102K | Sep 2005 – Sep 2022 |
| Briscoe Tract 20 Block 3 G-4-87289 | Diamond G Production only | Gold River, North (Olmos) | Webb | 1 | 31 | 114K | by Jan 1993 – Sep 2019 |
| Blocker Ranch (Sec. 1043) G-4-92657 | SM Energy Company only | Gold River, North (Olmos) | Webb | 1 | 14 | 20.7K | Nov 1993 – Nov 2012 |
| Blocker Ranch (SEC.1846) G-4-93200 | Lewis Petro Properties, Inc. only | Gold River, North (Olmos) | Webb | 1 | 6 | 113K | by Jan 1993 – Nov 2016 |
| Blocker Ranch "E" G-4-91151 | Lewis Petro Properties, Inc. only | Gold River, North (Olmos) | Webb | 1 | 1 | 103K | by Jan 1993 – Nov 2016 |
| Block, Anna G-4-176151 | Columbus Energy, LLC only | Wildcat | Webb | 1 | 0 | 0 | — |
| Killam and Hurd Fee Block 61 G-4-235035 | Killam Oil Co., Ltd. only | Wildcat | Webb | 1 | 0 | 0 | — |
| Briscoe, TRT, 30, Block 2 G-4-78715 | Diamond G Production only | Gold River, North (Olmos) | Webb | 1 | 0 | 75.1K | by Jan 1993 – Jul 2010 |
| Blocker, John R. 1837 G-4-113620 | Brask-Dumont Ranch, Inc. only | Gold River, North (Olmos) | Webb | 1 | 0 | 13.8K | by Jan 1993 – Aug 2026 |
| Blocker, John R. 1841 G-4-113622 | Brask-Dumont Ranch, Inc. only | Gold River, North (Olmos) | Webb | 1 | 0 | 56.5K | by Jan 1993 – Aug 2026 |
| Briscoe Tract 23 Block 2 G-4-78727 | Diamond G Production only | Gold River, North (Olmos) | Webb | 1 | 0 | 11.9K | Dec 2000 – May 2010 |
| Blocker Ranch 1840 G-4-81375 | Rosetta Resources Operating LP only | Gold River, North (Olmos) | Webb | 1 | 0 | 0 | — |
| Blocker, John R. 1841 G-4-113625 | Brask-Dumont Ranch, Inc. only | Gold River, North (Olmos) | Webb | 1 | 0 | 36.1K | May 1993 – Aug 2026 |
| Blocker Ranch G-4-72805 | Monterrey Petroleum Corp. only | Apache Ranch (Olmos) | Webb | 1 | 0 | 0 | — |
| Blocker Ranch G-4-69970 | Lewis Petro Properties, Inc. only | Gold River, North (Olmos) | Webb | 1 | 0 | 45.2K | by Jan 1993 – Apr 2001 |
| Briscoe Tract 22 Block 3 G-4-79336 | Diamond G Production only | Gold River, North (Olmos) | Webb | 1 | 0 | 74.9K | by Jan 1993 – Feb 2005 |
| Blocker, John R. 1843 G-4-113623 | Brask-Dumont Ranch, Inc. only | Gold River, North (Olmos) | Webb | 1 | 0 | 6.85K | May 1993 – Aug 2026 |
| Blocker, John R. 1839 G-4-116462 | Brask-Dumont Ranch, Inc. only | Gold River, North (Olmos) | Webb | 1 | 0 | 6.25K | May 1993 – Aug 2026 |
| Blocker Ranch G-4-72806 | Monterrey Petroleum Corp. only | Apache Ranch (Olmos Lower) | Webb | 1 | 0 | 0 | — |
| Briscoe Tract 13, Block 3 G-4-79339 | Legend Natural Gas II, LP only | Gold River, North (Olmos) | Webb | 1 | 0 | 47.1K | by Jan 1993 – Mar 2005 |
| Blocker, John R. -1843- G-4-81622 | Brask-Dumont Ranch, Inc. only | Blocker Ranch (Olmos N-3) | Webb | 1 | 0 | 0 | — |
| Blocker, John R. -1845- G-4-84444 | Calibogue Corporation only | Blocker Ranch (Olmos N-2) | Webb | 1 | 0 | 0 | — |
| Ed Rachal "West" G-4-84455 | Lewis Petro Properties, Inc. only | Blocker Ranch (Olmos N-2) | Webb | 1 | 0 | 493 | by Jan 1993 – Jan 1994 |
| Blocker, John R. -809- G-4-86798 | Lewis Petro Properties, Inc. only | Blocker Ranch (Olmos N-2) | Webb | 1 | 0 | 228 | May 1993 – Jan 2000 |
| Briscoe Block 3 G-4-87752 | Legend Natural Gas II, LP only | Gold River, North (Olmos) | Webb | 1 | 0 | 8.28K | Feb 2001 – Apr 2005 |
| Briscoe Tract II Block 3 G-4-91104 | Legend Natural Gas II, LP only | Gold River, North (Olmos) | Webb | 1 | 0 | 12.9K | Dec 2000 – Apr 2005 |
| Blocker Ranch H 1841 G-4-94384 | Jackson Energy Development, Inc. only | Gold River, North (Olmos) | Webb | 1 | 0 | 858 | Jun 1993 – Jun 1993 |
| Blocker Ranch "H" 1841 G-4-98426 | Jackson Energy Development, Inc. only | Gold River, North (Olmos) | Webb | 1 | 0 | 0 | — |
| Blocker "H" 1843 G-4-98427 | Jackson Energy Development, Inc. only | Gold River, North (Olmos) | Webb | 1 | 0 | 0 | — |
| Blocker Ranch "H" 1843 G-4-100527 | Jackson Energy Development, Inc. only | Apache Ranch (Olmos) | Webb | 1 | 0 | 0 | — |
| Blocker, John R. -1042- G-4-104030 | Lewis Petro Properties, Inc. only | Gold River, North (Olmos) | Webb | 1 | 0 | 10.4K | Feb 1993 – May 2009 |
| Blocker, John R -1854- G-4-104100 | Lewis Petro Properties, Inc. only | Gold River, North (Olmos) | Webb | 1 | 0 | 826 | May 1994 – Nov 1999 |
| Blocker, John R. 1839 G-4-113621 | Brask-Dumont Ranch, Inc. only | Gold River, North (Olmos) | Webb | 1 | 0 | 69.4K | by Jan 1993 – Feb 2014 |
| Blocker, John R. 810 G-4-113624 | Lewis Petro Properties, Inc. only | Blocker Ranch (Olmos N-2) | Webb | 1 | 0 | 159 | May 1993 – Jan 2000 |
| Briscoe 1040 G-4-138673 | Pinon Corporation only | Blocker Ranch (Olmos N-4) | Webb | 1 | 0 | 1.85K | by Jan 1993 – Jan 1993 |