| Lambert Gas Unit G-2-234183 | Hilcorp Energy Company only | Tom Oconnor (7930) | Refugio | 1 | 18.2K | 887K | Jan 2008 – Feb 2009 |
| Lambert, M. F. G-2-144497 | Devon Energy Production Co, L.P. only | Siene Bean (6960) | Refugio | 1 | 16.9K | 1.15M | Jan 1993 – Oct 1996 |
| Lambert, Charlie "A" G-13-248703 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 15.9K | 2.52M | Oct 2008 – Apr 2026 |
| D. Lambert G-2-249472 | Field Petroleum Corp. only | Koenig, North (Wilcox Migura) | De Witt | 1 | 12.4K | 705K | Sep 2008 – Apr 2019 |
| Lambert, Charlie "A" G-13-248686 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 10.9K | 2.51M | Oct 2008 – Apr 2026 |
| Lambert Gas Unit G-2-249215 | Hilcorp Energy Company only | Tom O' Connor (7800) | Refugio | 1 | 10.7K | 486K | Mar 2009 – Aug 2009 |
| Lambert Gas Unit G-2-234216 | Hilcorp Energy Company only | Tom Oconnor (7930) | Refugio | 1 | 10K | 484K | Feb 2008 – Oct 2008 |
| Lambert, Charlie "A" G-13-244121 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 8.19K | 1.46M | Sep 2008 – Apr 2026 |
| Lambert, Charlie "A" G-13-246402 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 7.18K | 1.16M | Oct 2008 – Apr 2026 |
| Lambert, M. F. G-2-84415 | Hilcorp Energy Company only | Tom Oconnor | Refugio | 1 | 7.11K | 577K | Jan 1993 – May 2010 |
| Lambert Gas Unit G-2-255564 | Hilcorp Energy Company only | Tom O'Connor (South 7700) | Refugio | 1 | 5.94K | 381K | Sep 2009 – Jan 2010 |
| Lambert, M. F. G-2-178401 | Devon Energy Production Co, L.P. only | Tom Oconnor (7940) | Refugio | 1 | 5.87K | 35.1K | Apr 2000 – Jul 2000 |
| Lambert, M.F. G-2-90036 | H & D Operating Company only | Tom Oconnor | Refugio | 1 | 5.45K | 1.15M | Jan 1993 – Oct 2004 |
| Lambert Gas Unit G-2-242628 | Hilcorp Energy Company only | Tom O'Connor (7700) | Refugio | 1 | 4.97K | 188K | Oct 2008 – Jan 2009 |
| Lambert, M. F. G-2-145259 | Pennzoil Exploration & Prod. Co. only | Siene Bean (6300) | Refugio | 1 | 3.23K | 241K | Apr 1993 – Jul 1994 |
| Lambert G-6-122680 | TGNR Gulf Coast LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 2.82K | 833K | Jan 1993 – Apr 2026 |
| Lambert, Charlie "A" G-13-186467 | BKV Barnett, LLC only | Newark, East (Barnett Shale) | Wise | 1 | 2.58K | 316K | Sep 2001 – Mar 2011 |
| M. F. Lambert G-2-255911 | Hilcorp Energy Company only | Tom O'Connor (8000, West) | Refugio | 1 | 1.68K | 12.5K | Feb 2010 – Jan 2011 |
| Lambert Gas Unit G-2-274195 | Hilcorp Energy Company only | Tom Oconnor (7930) | Refugio | 1 | 1.62K | 92.5K | Mar 2014 – Dec 2019 |
| Lambert G-6-212336 | TGNR Gulf Coast LLC only | Oak Hill (Cotton Valley) | Rusk | 1 | 1.47K | 388K | Apr 2005 – Mar 2018 |
| Lambert, M. F. G-2-159376 | Hilcorp Energy Company only | Refugio-Fox (5500) | Refugio | 1 | 1.25K | 474K | Jun 1996 – Jul 2004 |
| Lambert, M. F. G-2-36882 | Hilcorp Energy Company only | Tom Oconnor (4950) | Refugio | 1 | 878 | 991K | Jan 1993 – Feb 2022 |
| Lambert, M. F. G-2-83736 | Devon Energy Production Co, L.P. only | Tom Oconnor | Refugio | 1 | 807 | 185K | Jan 1993 – Dec 1994 |
| Lambert, Charlie G-13-28718 | BKV Barnett, LLC only | Boonsville (Bend Congl., Gas) | Wise | 1 | 628 | 290K | Jan 1993 – Aug 2016 |
| Hill-Lambert GU G-5-160596 | Atlas Operating LLC only | Marsters, N.E. | Freestone | 1 | 617 | 712K | Sep 1996 – Mar 2026 |
| Lambert, M. F. G-2-144500 | Pennzoil Exploration & Prod. Co. only | Siene Bean (6500) | Refugio | 1 | 539 | 1.02K | Jan 1993 – Mar 1993 |
| Lambert G-6-229528 | Sabine Energy Inc. only | Hardwood (Cotton Valley) | Harrison | 1 | 531 | 148K | May 2007 – Apr 2026 |
| Lambert, M. F. G-2-83972 | Pennzoil Exploration & Prod. Co. only | Refugio-Fox (5000) | Refugio | 1 | 463 | 155K | Jan 1993 – Dec 1994 |
| Lambert Gas Unit G-2-267700 | Hilcorp Energy Company only | Tom Oconnor (7930) | Refugio | 1 | 372 | 22.9K | May 2012 – Sep 2012 |
| Lambert "A" G-5-177765 | Corsa Resources, LLC only | Dew (C.V. Consolidated) | Freestone | 1 | 329 | 210K | Apr 2000 – Feb 2026 |
| Lambert, M. F. G-2-151991 | Pennzoil Exploration & Prod. Co. only | Refugio-Fox (5830) | Refugio | 1 | 306 | 50.7K | Oct 1994 – Mar 1995 |
| Lambert G-6-229145 | Sabine Oil & Gas Corporation only | Hardwood (Cotton Valley) | Harrison | 1 | 277 | 64.5K | Apr 2007 – Jun 2013 |
| Mary F. Lambert "EA" G-2-254174 | Hilcorp Energy Company only | Tom O'Connor (5350 Sand) | Refugio | 1 | 214 | 46.1K | Oct 2009 – Apr 2015 |
| Lambert, Charlie G-13-99444 | Devon Energy Production Co, L.P. only | Boonsville (Bend Congl., Gas) | Wise | 1 | 202 | 177K | Jan 1993 – Apr 2011 |
| Lambert, M.F. G-2-162261 | Devon Energy Production Co, L.P. only | Siene Bean (5150) | Refugio | 1 | 189 | 201K | Dec 1996 – Mar 1999 |
| Lambert, M. F. G-2-146091 | Hilcorp Energy Company only | Refugio-Fox (2600) | Refugio | 1 | 178 | 659K | Jul 1993 – Nov 1999 |
| Lambert G-2-143513 | Bagnall & Barber, Inc. only | Refugio-Fox (6600) | Refugio | 1 | 150 | 788 | Jan 1993 – Feb 1993 |
| Lambert Gas Unit G-2-260633 | Hilcorp Energy Company only | Tom Oconnor (7930) | Refugio | 1 | 125 | 111K | Feb 2011 – Dec 2019 |
| M. F. Lambert 151 G-2-258066 | Hilcorp Energy Company only | Tom Oconnor (6280) | Refugio | 1 | 104 | 18.7K | Oct 2010 – Aug 2011 |
| Lambert Gas Unit G-2-206528 | Hilcorp Energy Company only | Tom O'Connor (4925) | Refugio | 1 | 92 | 337K | Oct 2004 – Dec 2022 |
| Lambert Gas Unit G-2-279470 | Hilcorp Energy Company only | Tom O'Connor (4925) | Refugio | 1 | 89 | 1.24K | Jun 2018 – Sep 2018 |
| Lambert -B- G-5-93562 | XTO Energy Inc. only | Dew (C.V. Consolidated) | Freestone | 1 | 82 | 900K | Jan 1993 – Dec 2015 |
| Lambert, M. F. "H" G-2-162431 | Pennzenergy Exp. & Prod., L.L.C. only | Refugio-Fox (2550) | Refugio | 1 | 82 | 288K | Nov 1996 – May 1998 |
| Lambert, M. F. G-2-93703 | Hilcorp Energy Company only | Tom Oconnor (4200) | Refugio | 1 | 69 | 966K | Jan 1993 – Jun 2015 |
| Lambert "A" G-5-180850 | Corsa Resources, LLC only | Dew (C.V. Consolidated) | Freestone | 1 | 66 | 106K | Jan 2001 – Apr 2026 |
| Lambert "A" G-5-176717 | Corsa Resources, LLC only | Dew (C.V. Consolidated) | Freestone | 1 | 66 | 1.91M | Feb 2000 – Apr 2026 |
| Lambert "A" G-5-180251 | Diversified Production LLC only | Dew (C.V. Consolidated) | Freestone | 1 | 62 | 1.58M | Oct 2000 – Apr 2026 |
| Lambert M. F. G-2-159373 | Devon Energy Production Co, L.P. only | Refugio-Fox (3050) | Refugio | 1 | 50 | 731K | Jul 1996 – Apr 2000 |
| Lambert, Charlie G-13-144747 | BKV Barnett, LLC only | Boonsville (Bend Congl., Gas) | Wise | 1 | 48 | 66.8K | Feb 1993 – Apr 2026 |
| Lambert "A" G-5-182649 | Diversified Production LLC only | Dew (C.V. Consolidated) | Freestone | 1 | 24 | 580K | Mar 2001 – Apr 2026 |