| State Tract 216 O-2-6058 | Torrent Oil LLC only | Grass Island (Farwell -A-) | Calhoun | 4 | 666K | 243K | by Jan 1993 – Aug 2026 |
| State Tract 216 O-2-6506 | Torrent Oil LLC only | Grass Island (Matagorda -A-) | Calhoun | 8 | 635K | 497K | by Jan 1993 – Aug 2026 |
| State Tract 216 O-2-5707 | Torrent Oil LLC only | Grass Island (Farwell -M-) | Calhoun | 4 | 573K | 415K | by Jan 1993 – Aug 2026 |
| State Tract 216 O-2-6568 | Torrent Oil LLC only | Grass Island (4220) | Calhoun | 4 | 399K | 377K | by Jan 1993 – Sep 2025 |
| State Tract 99 O-2-4219 | TR Offshore, LLC only | Mosquito Point (Frio I) | Calhoun | 3 | 341K | 563K | Sep 1994 – May 2025 |
| State of Texas #33724 O-2-1271 | Bep Operating, LLC only | Powderhorn (5200 Sand) | Calhoun | 6 | 293K | 214K | by Jan 1993 – Nov 2015 |
| Texas State Tract 117 G-2-138507 | Vintage Petroleum, Inc. only | Panther Reef, SW. (Frio G-1) | Calhoun | 1 | 244K | 4.37M | by Jan 1993 – Sep 1999 |
| State Tract 216 O-2-7049 | Torrent Oil LLC only | Grass Island (4870) | Calhoun | 2 | 191K | 151K | by Jan 1993 – Aug 2026 |
| Cox Bay State Tract No. 59 G-2-128647 | Remora Operating, LLC only | Maude B. Traylor (F-41-61, Deep) | Calhoun | 1 | 132K | 3.52M | by Jan 1993 – Sep 2020 |
| State of Texas 33724 O-2-8241 | XOG Operating LLC only | Powderhorn (4 North) | Calhoun | 1 | 112K | 148K | Jan 1997 – Aug 2005 |
| State Tract #59 O-2-3900 | Gulf E&P Ltd only | Zoller, S. (Frio G-3) | Calhoun | 1 | 88.8K | 126K | by Jan 1993 – May 2016 |
| Quail Ridge/State Unit G-2-275993 | Neumin Production Company only | Lavaca Bay (F-46) | Calhoun | 1 | 83.8K | 1.63M | Nov 2013 – May 2018 |
| State Tract 254 G-2-217956 | Columbus Energy, LLC only | Appling Deep, SW (Frio) | Calhoun | 1 | 76.5K | 989K | Aug 2005 – Feb 2019 |
| Quail Ridge/State Unit G-2-267712 | Neumin Production Company only | Lavaca Bay (F-46) | Calhoun | 1 | 74.7K | 1.55M | Apr 2012 – Jun 2016 |
| State of Texas 33724 O-2-6607 | Apache Corporation only | Powderhorn (4 North) | Calhoun | 2 | 71.5K | 56.1K | by Jan 1993 – Oct 1994 |
| State of Texas 33724 O-2-7884 | Bep Operating, LLC only | Powderhorn (3-B) | Calhoun | 2 | 58.8K | 51.2K | Jun 1993 – Aug 2018 |
| State Tract 38 G-2-138463 | Neumin Production Company only | Lavaca Bay (F-46) | Calhoun | 1 | 44.9K | 5.83M | by Jan 1993 – Aug 2017 |
| Traylor, M.B. Estate G-2-154264 | White Marlin Operating Co, LLC only | Maude B. Traylor (F-41-61, Deep) | Calhoun | 1 | 44.7K | 896K | May 1995 – Apr 2020 |
| State Tract 26 G-2-153920 | Neumin Production Company only | Lavaca Bay (F-34) | Calhoun | 1 | 43.1K | 4.8M | Mar 1995 – Aug 2017 |
| State Tract 150 G-2-216125 | Sonterra Operating, Inc. only | Matagorda Bay (Bol Mex) | Calhoun | 1 | 42.4K | 1.06M | Aug 2005 – Mar 2008 |
| State Tract 99 O-2-11130 | TR Offshore, LLC only | Mosquito Point (Frio F) | Calhoun | 1 | 40.2K | 115K | Mar 2015 – May 2025 |
| State Tract 117 G-2-180697 | Alta Mesa Services, LP only | Panther Reef, SW. (Frio G) | Calhoun | 1 | 36.7K | 775K | Oct 1999 – Apr 2010 |
| State Tract 216 O-2-8740 | Torrent Oil LLC only | Grass Island (Farwell Q) | Calhoun | 2 | 32.1K | 44.8K | Feb 2002 – Feb 2012 |
| Shofner, W. A., Estate O-2-3339 | Initial Energy Services, LLC only | Sheriff (5700 Greta Sand) | Calhoun | 5 | 30.9K | 45.5K | by Jan 1993 – Dec 2025 |
| State of Texas 33724 O-2-7910 | Bep Operating, LLC only | Powderhorn (3A) | Calhoun | 2 | 30.6K | 43.5K | Oct 1993 – Aug 1996 |
| State Tract 216 O-2-7162 | Petro-Guard Company, Inc. only | Grass Island, E. (Farwell Q) | Calhoun | 1 | 28.3K | 18.5K | by Jan 1993 – Dec 1995 |
| State Tract 86 G-2-168365 | Neumin Production Company only | Panther Reef, SW. (Frio E-4) | Calhoun | 1 | 27.8K | 5.09M | Feb 1998 – Apr 2017 |
| State Tract No. 77 O-2-8660 | Rincon Petroleum Corporation only | Olivia, South (8300) | Calhoun | 1 | 27.4K | 158K | Jul 2001 – Sep 2009 |
| Quail Ridge/State Unit O-2-10470 | Neumin Production Company only | Lavaca Bay (F-49) | Calhoun | 1 | 25.8K | 161K | Feb 2013 – Oct 2013 |
| State Tract 116 G-2-191375 | Alta Mesa Services, LP only | Panther Reef, SW. (Frio G-1) | Calhoun | 1 | 24.3K | 942K | Nov 1999 – Aug 2011 |
| State Tract 38 G-2-140016 | Neumin Production Company only | Lavaca Bay (F-43) | Calhoun | 1 | 23.6K | 1.52M | by Jan 1993 – May 2018 |
| State Tract 10 G-2-234218 | Neumin Production Company only | Port Lavaca, East (Marg.) | Calhoun | 1 | 21.1K | 400K | May 2008 – Dec 2011 |
| State Tract 89 G-2-193153 | Neumin Production Company only | Panther Reef (Frio Cons.) | Calhoun | 1 | 21K | 4.19M | Oct 2002 – Jan 2013 |
| State Tract 46 O-2-4161 | Gulf E&P Ltd only | Zoller (Frio -G-3) | Calhoun | 1 | 20.9K | 177K | by Jan 1993 – May 2016 |
| State Tract 66 O-2-6367 | Crest Petroleum, LLC only | San Antonio Bay, N. (B-3 Frio) | Calhoun | 1 | 18.8K | 43.1K | by Jan 1993 – Jan 2009 |
| State Tract 26 G-2-106801 | Neumin Production Company only | Lavaca Bay (F-39) | Calhoun | 1 | 17.8K | 881K | by Jan 1993 – Jan 2018 |
| State Tract 77 O-2-9483 | Silverbrook Operating, LLC only | Maude B. Traylor (Freda) | Calhoun | 1 | 17.6K | 0 | Oct 2010 – Aug 2026 |
| State Tract 209 G-2-263470 | CKS Operating, LLC only | Appling, North (Melbourne) | Calhoun | 1 | 16.7K | 1.84M | Jun 2011 – Oct 2023 |
| State Tract 72 O-2-6499 | Crest Petroleum, LLC only | San Antonio Bay, N. (B-3 Frio) | Calhoun | 1 | 14.4K | 19.8K | by Jan 1993 – Jan 2009 |
| State Tract 100 G-2-230808 | Lamar Oil & Gas, Inc. only | Mosquito Point, N. (Frio I) | Calhoun | 1 | 13.5K | 316K | Jul 2004 – May 2011 |
| State Tract 210 O-2-8623 | Torrent Oil LLC only | Grass Island (4220) | Calhoun | 1 | 13.3K | 37.9K | Sep 2000 – Feb 2009 |
| State Tract G-2-171294 | Esenjay Exploration, Inc only | Olivia, East (8300, Upper) | Calhoun | 1 | 13.2K | 792K | Jan 1998 – May 2001 |
| State Tract 177 O-2-6783 | Petro-Guard Production,l.l.c. only | Steamboat Pass (4970 Miocene) | Calhoun | 1 | 13.1K | 19.8K | by Jan 1993 – Dec 1996 |
| State Tract 38 O-2-11051 | Neumin Production Company only | Lavaca Bay (F-49) | Calhoun | 1 | 12.9K | 114K | Apr 2015 – Sep 2016 |
| State Tract 89 G-2-269199 | Lamar Oil & Gas, Inc. only | Panther Reef (Frio Cons.) | Calhoun | 1 | 12.1K | 549K | Sep 2012 – May 2015 |
| State Tract 72 G-2-47204 | Crest Petroleum, LLC only | San Antonio Bay, N. (D-3) | Calhoun | 1 | 11.6K | 408K | by Jan 1993 – Feb 2014 |
| State Tract 85 G-2-112399 | Neumin Production Company only | Panther Reef, SW. (Frio E-4) | Calhoun | 1 | 11.3K | 6.76M | by Jan 1993 – Jan 2013 |
| State Tract 100 G-2-266396 | Lamar Oil & Gas, Inc. only | Mosquito Point, N. (Frio F) | Calhoun | 1 | 11.1K | 309K | Jun 2011 – May 2025 |
| State Tract 38 G-2-149951 | Neumin Production Company only | Lavaca Bay (F-34) | Calhoun | 1 | 10K | 1.04M | Sep 1994 – Nov 2017 |
| State Tract 116 G-2-175299 | Vintage Petroleum, Inc. only | Panther Reef, S.W. (Frio H-2) | Calhoun | 1 | 7.97K | 222K | Oct 1998 – Sep 1999 |