| West-Schenck "B" O-3-24423 | Blue Ridge Operating LLC only | Blue Ridge | Fort Bend | 119 | 1.41M | 47 | Sep 2003 – Apr 2026 |
| Schenck G-3-141008 | XOG Resources, LLC only | Chocolate Bayou (Andrau Stray) | Brazoria | 1 | 521K | 2.83M | Jan 1993 – Jun 2017 |
| Houston "M" O-3-23056 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou, N. (Schenck) | Brazoria | 1 | 232K | 460K | Jun 1996 – Jan 2025 |
| Cortese Unit O-3-22221 | El Tres Exploration only | Franks (Schenck Sand) | Galveston | 1 | 196K | 302K | Aug 1993 – Jun 1998 |
| Tibaldo, Louis O-3-15621 | Womack Operating, LLC. only | Tibaldo (Schenck Sd. Upper) | Galveston | 2 | 181K | 249K | Jan 1993 – Mar 2023 |
| Schenck G-3-158354 | XOG Resources, LLC only | Chocolate Bayou (12,000-S) | Brazoria | 1 | 166K | 3.81M | Jan 1996 – Oct 1998 |
| Cortese Unit O-3-24536 | Hilcorp Energy Company only | Franks (Schenck Upper) | Galveston | 1 | 128K | 379K | Apr 2004 – Aug 2023 |
| Camp Wallace D O-3-25132 | Hilcorp Energy Company only | Franks (Schenck Sand) | Galveston | 1 | 114K | 318K | Mar 2008 – Aug 2022 |
| Franks, C. E. Oil Unit # 1 O-3-24342 | Hunt, Hassie Exploration Company only | Franks (Schenck Upper) | Galveston | 1 | 105K | 474K | Feb 2003 – Jan 2007 |
| Gordon O-3-25956 | Hilcorp Energy Company only | Franks (Schenck Upper) | Galveston | 1 | 104K | 306K | Jun 2012 – Mar 2018 |
| Ghinaudo, M., et Al G-3-217935 | Hilcorp Energy Company only | Franks (Schenck Sand) | Galveston | 1 | 95.5K | 389K | Jun 2006 – Feb 2024 |
| Cortese Unit O-3-21639 | El Tres Exploration only | Goody (Schenck) | Galveston | 1 | 75.8K | 90.6K | Jan 1993 – Jul 1993 |
| Siercovich, et al Unit O-3-23537 | Orangefield East Corp only | Franks (Schenck Sand) | Galveston | 1 | 72.8K | 39K | Jun 1998 – Apr 2026 |
| Schenck G-3-283765 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou (Frio, First) | Brazoria | 1 | 72.5K | 147K | Feb 2018 – Feb 2026 |
| W. T. Reitmeyer et al Unit O-3-22218 | Hunt, Hassie Exploration Company only | Franks (Schenck Sand) | Galveston | 1 | 56.3K | 94.9K | Jan 1994 – Jun 1999 |
| Cortese Unit O-3-23574 | Hunt, Hassie Exploration Company only | Cortese (Schenck Sand, Upper) | Galveston | 1 | 44.5K | 109K | Jul 1998 – Mar 2004 |
| Houston "M" O-3-21090 | Howard Exploration, Inc. only | Chocolate Bayou, N. (Schenck) | Brazoria | 1 | 43K | 208K | Jan 1993 – Jun 1994 |
| Green, S. H., Oil Unit O-3-9954 | Hunt, Hassie Exploration Company only | Franks (Schenck Sand) | Galveston | 2 | 38.4K | 233K | Feb 1993 – May 2001 |
| Camp Wallace -D- G-3-138961 | Hunt, Hassie Exploration Company only | Franks (Schenck Upper) | Galveston | 1 | 29.6K | 1.06M | Jan 1993 – Jul 2000 |
| West & Schenck -B- O-3-423 | Kelton, B.J. only | Blue Ridge | Fort Bend | 4 | 26.6K | 63 | Jan 1993 – Jan 2002 |
| Black Stone Ivory G-3-211194 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou, S. (Schenck) | Brazoria | 1 | 21.6K | 1.44M | Aug 2005 – Jul 2021 |
| Schenck G-3-269946 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou ( Wieting Up.) | Brazoria | 1 | 19.4K | 1.02M | Jan 2013 – Mar 2024 |
| Ghinaudo, M. et Al G-3-186169 | Hunt, Hassie Exploration Company only | Franks (Schenck Upper) | Galveston | 1 | 13.8K | 516K | Oct 2001 – Feb 2003 |
| Houston "M" G-3-150204 | Howard Exploration, Inc. only | Chocolate Bayou, N. (Schenck) | Brazoria | 1 | 12.5K | 228K | Jun 1994 – Jun 1996 |
| Wieting, A. M. G-3-172642 | Enervest Operating, L.L.C. only | Chocolate Bayou ( Schenck) | Brazoria | 1 | 11.9K | 726K | Mar 1999 – Jun 2001 |
| Schenck O-3-24855 | White Marlin Operating Co, LLC only | Chocolate Bayou ( Frio Upper) | Brazoria | 1 | 10.3K | 32.2K | Nov 2005 – Aug 2006 |
| Houston "M" G-3-138425 | Howard Exploration, Inc. only | Chocolate Bayou, N. (Schenck) | Brazoria | 1 | 6.81K | 255K | Jan 1993 – Jun 1994 |
| Schenck, West O-3-465 | ZK Petroleum Co., L.L.C. only | Blue Ridge | Fort Bend | 3 | 5.07K | 76 | Jan 1993 – Jun 2004 |
| Schenck G-3-283501 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou ( 9,300) | Brazoria | 1 | 5.03K | 72.7K | Jul 2017 – Jan 2018 |
| West-Schenck O-3-458 | ZK Petroleum Co., L.L.C. only | Blue Ridge | Fort Bend | 7 | 4.64K | 83 | Jan 1993 – Mar 1997 |
| Aronsfeld Gas Unit O-3-24619 | Hunt, Hassie Exploration Company only | Franks (Schenck Upper) | Galveston | 1 | 3.42K | 25.7K | Oct 2004 – Aug 2006 |
| Aronsfeld Gas Unit G-3-219429 | XTO Energy Inc. only | Franks (Schenck Upper) | Galveston | 1 | 1.65K | 29.8K | Sep 2006 – Aug 2010 |
| Miller G-3-280758 | XOG Resources, LLC only | Chocolate Bayou ( Schenck) | Brazoria | 1 | 1.64K | 46.1K | May 2016 – Jul 2016 |
| Cozby G-3-149410 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou ( Schenck) | Brazoria | 1 | 1.33K | 359K | Mar 1994 – Apr 2001 |
| M.ghinaudo et al Gas Unit O-3-24752 | Hunt, Hassie Exploration Company only | Franks (Schenck Sand) | Galveston | 1 | 1.26K | 7.06K | Apr 2005 – Oct 2005 |
| Schenck O-3-23259 | XOG Resources, LLC only | Chocolate Bayou ( Alibel) | Brazoria | 1 | 786 | 9.67K | Jul 1997 – Dec 1997 |
| Wilson, R.K. Gas Unit No. 1 G-3-162439 | Dune Operating Company only | Chocolate Bayou ( Schenck) | Brazoria | 1 | 495 | 48.8K | Feb 1997 – Jun 1997 |
| Federal Delange Gas Unit G-3-274735 | Hilcorp Energy Company only | Franks (Schenck Upper) | Galveston | 1 | 46 | 51 | Dec 2013 – Mar 2014 |
| West-Schenck O-3-449 | Viceroy Petroleum, LP only | Blue Ridge | Fort Bend | 16 | 43 | 1 | Oct 1993 – Oct 1993 |
| Schenck G-3-282396 | XOG Resources, LLC only | Chocolate Bayou ( Ho.fms. UP) | Brazoria | 1 | 34 | 2.32K | Jun 2017 – Jul 2017 |
| Green,s.h. O-3-10544 | Hilcorp Energy Company only | Franks (Schenck Sand) | Galveston | 1 | 0 | 0 | — |
| Schenck G-3-5575 | Phillips Petroleum Company only | Chocolate Bayou ( Wieting Up.) | Brazoria | 1 | 0 | 0 | — |
| Cozby G-3-34791 | Phillips Petroleum Company only | Chocolate Bayou ( Schenck) | Brazoria | 1 | 0 | 0 | — |
| Schenck G-3-43365 | Phillips Petroleum Company only | Chocolate Bayou ( Schenck) | Brazoria | 1 | 0 | 183 | Jun 1997 – Jun 1997 |
| Shell Point Unit G-3-60674 | Bridge Oil Company, L. P. only | Rattlesnake Mound, W. (Schenck) | Brazoria | 1 | 0 | 0 | — |
| Ghinaudo, Frank Unit 1 G-3-129940 | Hunt, Hassie Exploration Company only | Franks (Schenck Upper) | Galveston | 1 | 0 | 0 | — |
| Houston -A- G-3-136309 | Elliott Oil & Gas Operating Co. only | Chocolate Bayou, N. (Schenck) | Brazoria | 1 | 0 | 0 | — |
| R. K. Wilson Gas Unit #1 G-3-136806 | Dune Operating Company only | Chocolate Bayou ( Schenck) | Brazoria | 1 | 0 | 0 | — |
| Franks, C. E. Gas Unit # 1 G-3-225092 | Hunt, Hassie Exploration Company only | Franks (Schenck Upper) | Galveston | 1 | 0 | 12.5K | Feb 2007 – Jun 2008 |
| West & Schenck O-3-431 | Ramco Oil Co. only | Blue Ridge | Fort Bend | 8 | 0 | 0 | — |