| Cockburn Deep Frio Unit No. 1 G-3-237668 | Orx Resources, L.L.C. only | Magnet Withers (Frio Cons.) | Wharton | 1 | 141K | 225K | Dec 2007 – Apr 2026 |
| Cockburn Deep Frio Unit NO.1 G-3-219124 | White Oak Operating Company LLC only | Magnet Withers (Frio Cons.) | Wharton | 1 | 47.1K | 333K | Mar 2006 – Jul 2015 |
| Cockburn State Yegua Unit G-3-245421 | Milagro Exploration, LLC only | Magnet Withers (Martinez SD) | Wharton | 1 | 38.5K | 8.99M | Nov 2008 – Oct 2010 |
| Cockburn, H. C. G-3-242048 | Milagro Exploration, LLC only | Magnet Withers | Wharton | 1 | 26K | 34.6K | Jun 2007 – Sep 2008 |
| Cockburn, H. C. G-3-219134 | Milagro Exploration, LLC only | Magnet Withers (Frio Cons.) | Wharton | 1 | 23.3K | 197K | Jun 2006 – Dec 2013 |
| Cockburn, H.C. G-3-273703 | Orx Resources, L.L.C. only | Magnet Withers (Frio Cons.) | Wharton | 1 | 22.1K | 49.2K | Sep 2014 – Dec 2022 |
| Cockburn, H. C. G-3-221740 | Milagro Exploration, LLC only | Magnet Withers (Frio Cons.) | Wharton | 1 | 17K | 273K | Apr 2006 – May 2014 |
| Cockburn, H. C. G-3-253222 | Milagro Exploration, LLC only | Magnet Withers (Frio Cons.) | Wharton | 1 | 11.1K | 129K | Oct 2008 – Mar 2012 |
| Cockburn, H. C. G-3-225118 | Orx Resources, L.L.C. only | Magnet Withers (Marginulina 2) | Wharton | 1 | 6.75K | 7.43K | Apr 2006 – Mar 2007 |
| Cockburn Deep Frio Unit No. 1 G-3-237666 | Milagro Exploration, LLC only | Magnet Withers (Frio Cons.) | Wharton | 1 | 6.06K | 220K | Dec 2007 – Jan 2014 |
| Cockburn Deep Frio Unit NO.1 G-3-242508 | Milagro Exploration, LLC only | Magnet Withers (Frio Cons.) | Wharton | 1 | 3.59K | 90.7K | Jul 2008 – Sep 2013 |
| Cockburn, H.C. G-3-243697 | Milagro Exploration, LLC only | Magnet Withers (Frio Cons.) | Wharton | 1 | 566 | 18.2K | Aug 2008 – Dec 2009 |
| Cockburn, H.C. G-3-243687 | Milagro Exploration, LLC only | Magnet Withers (Frio Cons.) | Wharton | 1 | 532 | 208K | Jul 2008 – Jan 2013 |
| Cockburn G-13-259963 | Stonebriar Oil LLC only | Newark, East (Barnett Shale) | Wise | 1 | 477 | 223K | Sep 2008 – Oct 2012 |
| Cockburn, H. C. G-3-179202 | Milagro Exploration, LLC only | Magnet Withers (Miocene 3850) | Wharton | 1 | 435 | 381K | Aug 2000 – Aug 2008 |
| Cockburn, H. C. G-3-255993 | Milagro Exploration, LLC only | Magnet Withers (Frio Cons.) | Wharton | 1 | 309 | 26.6K | Mar 2010 – Jul 2011 |
| Cockburn, H. C. G-3-201541 | Central Gulf Petroleum Inc only | Magnet Withers (M-4) | Wharton | 1 | 297 | 954K | Mar 2004 – Nov 2018 |
| Cockburn, H. C. G-3-219120 | Milagro Exploration, LLC only | Magnet Withers (F-24) | Wharton | 1 | 103 | 140K | Apr 2006 – Aug 2010 |
| Cockburn, H.C. G-3-257821 | Milagro Exploration, LLC only | Magnet Withers (Frio Cons.) | Wharton | 1 | 67 | 69.2K | Jul 2010 – Jun 2013 |
| Cockburn, H. C. G-3-151085 | Orx Resources, L.L.C. only | Magnet Withers (Miocene 4200) | Wharton | 1 | 56 | 184K | Sep 1994 – Mar 2007 |
| Cockburn, H. C. G-3-243695 | Milagro Exploration, LLC only | Magnet Withers | Wharton | 1 | 8 | 48.2K | Jun 2007 – Nov 2007 |
| Cockburn, H. C. G-3-242501 | Milagro Exploration, LLC only | Magnet Withers (Frio Cons.) | Wharton | 1 | 2 | 146K | Apr 2007 – Jun 2009 |
| Cockburn, H. C. G-3-141064 | Exxon Corp. only | Magnet Withers (Marginulina 1) | Wharton | 1 | 0 | 5.63K | Jan 1993 – Mar 1993 |
| Cockburn, H. C. G-3-153034 | Milagro Exploration, LLC only | Magnet Withers (Miocene 4000) | Wharton | 1 | 0 | 36K | Apr 1995 – Feb 2010 |
| Cockburn, H. C. "A" G-3-157193 | McGowan Working Partners, Inc. only | Magnet Withers (Miocene 4000) | Wharton | 1 | 0 | 2.95K | Jun 1995 – Jul 1997 |
| Cockburn Oil Corp. Unit G-3-170592 | Charolais Energy, LLC only | Magnet Withers, E.(miocene 3670) | Wharton | 1 | 0 | 316K | Jul 1998 – May 2007 |
| Cockburn G-3-180260 | Resource Expl & Prod, Inc. only | Magnet Withers (Miocene 3900) | Wharton | 1 | 0 | 250K | Nov 2000 – Apr 2010 |
| Weakley-Cockburn Unit G-3-188255 | Blue Flame Operating Company LLC only | Magnet Withers (Miocene 2600) | Wharton | 1 | 0 | 24.7K | Mar 2002 – Dec 2011 |
| Weakley-Cockburn Unit G-3-188256 | Blue Flame Operating Company LLC only | Magnet Withers (Miocene 3900) | Wharton | 1 | 0 | 798K | Mar 2002 – Nov 2018 |
| Berberish-Cockburn Unit G-3-188368 | Houston Gulf Energy Corporation only | Magnet Withers (Miocene 3600) | Wharton | 1 | 0 | 41.9K | Mar 2002 – Jun 2013 |
| Berberish-Cockburn Unit G-3-188369 | Blue Flame Operating Company LLC only | Magnet Withers (Miocene 3900) | Wharton | 1 | 0 | 741K | Mar 2002 – Nov 2018 |
| Cockburn, H. C. G-3-199423 | White Oak Operating Company LLC only | Wildcat | Wharton | 1 | 0 | 0 | — |
| Cockburn, H. C. G-3-221789 | Milagro Exploration, LLC only | Magnet Withers (F- 9) | Wharton | 1 | 0 | 126K | May 2006 – Jun 2008 |
| Cockburn, H. C. G-3-225104 | Orx Resources, L.L.C. only | Magnet Withers (Heterostegina) | Wharton | 1 | 0 | 0 | — |
| Cockburn, H. C. G-3-225171 | Orx Resources, L.L.C. only | Magnet Withers (Miocene 4000) | Wharton | 1 | 0 | 30.9K | Aug 2006 – Oct 2007 |
| Cockburn, H. C. G-3-225172 | Orx Resources, L.L.C. only | Magnet Withers (Heterostegina) | Wharton | 1 | 0 | 0 | — |
| Cockburn, H. C. G-3-225393 | Orx Resources, L.L.C. only | Magnet Withers (M-4) | Wharton | 1 | 0 | 26.8K | Aug 2006 – Jul 2007 |
| Cockburn, H. C. G-3-234823 | Orx Resources, L.L.C. only | Magnet Withers (Marginulina 1) | Wharton | 1 | 0 | 155K | May 2006 – Jan 2018 |
| Cockburn, H. C. G-3-239783 | White Oak Operating Company LLC only | Magnet Withers (Marginulina 1) | Wharton | 1 | 0 | 0 | — |
| Cockburn, H. C. G-3-242370 | Orx Resources, L.L.C. only | Magnet Withers (Marginulina 2) | Wharton | 1 | 0 | 81.1K | May 2008 – Apr 2011 |
| Cockburn, H. C. G-3-242378 | Orx Resources, L.L.C. only | Magnet Withers (Marginulina 2) | Wharton | 1 | 0 | 39.6K | Jun 2008 – Aug 2017 |
| Cockburn, H. C. G-3-243673 | Milagro Exploration, LLC only | Magnet Withers (Frio Cons.) | Wharton | 1 | 0 | 89.3K | Jul 2007 – Apr 2009 |
| Cockburn, H. C. G-3-244969 | Orx Resources, L.L.C. only | Magnet Withers (Marginulina 1) | Wharton | 1 | 0 | 176K | Apr 2008 – Jul 2019 |
| Cockburn, H. C. G-3-249830 | Milagro Exploration, LLC only | Magnet Withers (Mio 4400) | Wharton | 1 | 0 | 53.4K | Dec 2007 – Nov 2008 |
| Cockburn, H. C. G-3-250212 | Milagro Exploration, LLC only | Magnet Withers (Frio Cons.) | Wharton | 1 | 0 | 0 | — |
| Cockburn, H. C. G-3-255244 | Orx Resources, L.L.C. only | Magnet Withers | Wharton | 1 | 0 | 55.4K | Mar 2010 – Oct 2017 |
| Cockburn, H. C. G-3-258097 | Milagro Exploration, LLC only | Magnet Withers (Frio Cons.) | Wharton | 1 | 0 | 40.6K | Sep 2010 – Oct 2012 |
| Cockburn, HC G-3-261233 | Orx Resources, L.L.C. only | Magnet Withers (Mio 4400) | Wharton | 1 | 0 | 0 | — |
| Cockburn, H. C. G-3-261667 | Orx Resources, L.L.C. only | Magnet Withers (Heterostegina) | Wharton | 1 | 0 | 0 | — |
| Cockburn, H.C. G-3-271746 | Milagro Exploration, LLC only | Magnet Withers (Frio Cons.) | Wharton | 1 | 0 | 10.9K | Nov 2013 – Mar 2014 |