| Lampley, P. F. G-2-62887 | Block "T" Petroleum, Inc. | Hope, North (2880 Frio) | — | 1 | 0 | 449 | Jan 1993 – Mar 1994 |
| Urban, Lillie et Al G-2-114357 | Block "T" Petroleum, Inc. | Pridham Lake, West (2350) | Victoria | 1 | 0 | 30.1K | Jan 1993 – May 1998 |
| Urban, Lillie et Al G-2-136821 | Block "T" Petroleum, Inc. | Pridham Lake, West (1300) | Victoria | 1 | 0 | 0 | Jan 1993 – May 1998 |
| Hoff, Edwina G-2-137803 | Block "T" Petroleum, Inc. | Arneckeville, S. (Y-1,OIL) | De Witt | 1 | 0 | 28K | Jan 1993 – May 1998 |
| Hubberd,a.r. G.U. G-4-67945 | Block "T" Petroleum, Inc. | Rosita, NW (Wilcox R-S-U Cons.) | — | 1 | 0 | 7.62M | Jan 1993 – Jul 2026 |
| Weatherby-Wernecke Gas Unit G-4-74899 | Block "T" Petroleum, Inc. | Rosita, NW. (Wilcox S-8) | — | 1 | 0 | 8.26M | Jan 1993 – Jul 2026 |
| Hubberd - Frost Nat'l. Bank G.U. G-4-75912 | Block "T" Petroleum, Inc. | Rosita, N.W. (Wilcox U) | Duval | 1 | 0 | 16.8M | Jan 1993 – Jul 2026 |
| Weatherby-Wernecke Gas Unit G-4-81828 | Block "T" Petroleum, Inc. | Rosita, N.W. (Wilcox U) | Duval | 1 | 0 | 2.59M | Jan 1993 – Jul 2026 |
| Hubberd-Frost Nat'l Bank G.U. G-4-94044 | Block "T" Petroleum, Inc. | Rosita, NW. (Wilcox S) | Duval | 1 | 0 | 6.17M | Jan 1993 – Jul 2026 |
| Weatherby, L. C. Gas Unit G-4-96324 | Block "T" Petroleum, Inc. | Rosita, NW (Wilcox W) | Duval | 1 | 0 | 1.15M | Jan 1993 – Jul 2026 |
| Muzza, G. P. G-4-117914 | Block "T" Petroleum, Inc. | Fandango (Wilcox, Upper T6) | Zapata | 1 | 0 | 2.93M | Jan 1993 – Nov 2025 |
| Zachry, H.B. Co. G-4-118365 | Block "T" Petroleum, Inc. | Fandango (Wilcox, Upper T10) | Zapata | 1 | 0 | 9.03M | Jan 1993 – Jul 2026 |
| Hinojosa, G. G. G-4-119105 | Block "T" Petroleum, Inc. | Fandango (Wilcox, Upper T10) | Zapata | 1 | 0 | 19.9M | Jan 1993 – Jul 2026 |
| Weatherby, L.C. Gas Unit G-4-125661 | Block "T" Petroleum, Inc. | Rosita, NW (Wilcox W) | Duval | 1 | 0 | 25.3M | Jan 1993 – Jul 2026 |
| Hubberd - Frost Nat'l Bank G.U. G-4-127594 | Block "T" Petroleum, Inc. | Rosita, NW (Wilcox W) | Duval | 1 | 0 | 8.97M | Jan 1993 – Jul 2026 |
| Weatherby, L.C. Gas Unit G-4-129882 | Block "T" Petroleum, Inc. | Rosita, N.W. (Wilcox U) | Duval | 1 | 0 | 3.09M | Jan 1993 – Jul 2026 |
| Weatherby, L.C. Gas Unit G-4-133007 | Block "T" Petroleum, Inc. | Rosita, N.W. (Wilcox X) | Duval | 1 | 0 | 7.2M | Jan 1993 – Jul 2026 |
| Muzza, G. P. G-4-133176 | Block "T" Petroleum, Inc. | Fandango (Wilcox R) | Zapata | 1 | 0 | 23.1M | Jan 1993 – Jul 2026 |
| L. C. Weatherby Gas Unit G-4-136273 | Block "T" Petroleum, Inc. | Rosita, NW (Wilcox W) | Duval | 1 | 0 | 6.58M | Jan 1993 – Jul 2026 |
| Weatherby-Wernecke "P" Sand G.U. G-4-136522 | Block "T" Petroleum, Inc. | Rosita (Wilcox P) | Duval | 1 | 0 | 3.68M | Jan 1993 – Jul 2026 |
| Hubberd-Frost Nat. Bank Gas Unit G-4-137108 | Block "T" Petroleum, Inc. | Rosita, NW (Wilcox R-S-U Cons.) | Duval | 1 | 0 | 3.29M | Jan 1993 – Jul 2026 |
| Weatherby-Weatherby Gas Unit G-4-137188 | Block "T" Petroleum, Inc. | Rosita, N.W. (Wilcox X) | Duval | 1 | 0 | 13.9M | Jan 1993 – Jul 2026 |
| Weatherby - Weatherby Gas Unit G-4-138674 | Block "T" Petroleum, Inc. | Rosita, NW (Wilcox Y) | Duval | 1 | 0 | 4.64M | Jan 1993 – Jul 2026 |
| Zachry, H. B. Co. G-4-139140 | Block "T" Petroleum, Inc. | Fandango (Wilcox, Upper T9) | Zapata | 1 | 0 | 3.97M | Jan 1993 – Jul 2026 |
| Weatherby-Weatherby Gas Unit G-4-139577 | Block "T" Petroleum, Inc. | Rosita, NW (Wilcox W) | Duval | 1 | 0 | 4.03M | Jan 1993 – Jul 2026 |
| Zachry, H. B. Company G-4-149444 | Block "T" Petroleum, Inc. | Fandango (Wilcox Consolidated) | Zapata | 1 | 0 | 30.7M | Nov 1993 – Jul 2026 |
| Hubberd-Frost Nat'l Bank G/U G-4-153324 | Block "T" Petroleum, Inc. | Rosita, NW (Wilcox R-S-U Cons.) | Duval | 1 | 0 | 5.91M | Feb 1995 – Jul 2026 |
| Hinojosa, G. G. G-4-158365 | Block "T" Petroleum, Inc. | Fandango (Wilcox Q) | Zapata | 1 | 0 | 1.33M | Jan 1996 – Jul 2026 |
| Kilgore-Wernecke Gas Unit G-4-161390 | Block "T" Petroleum, Inc. | Rosita, NW (Wilcox Y) | Duval | 1 | 0 | 4.03M | Dec 1996 – Jul 2026 |
| Weatherby - Weatherby Gas Unit G-4-161940 | Block "T" Petroleum, Inc. | Rosita, NW (Wilcox Cons.) | Duval | 1 | 0 | 6.35M | Jan 1997 – Jul 2026 |
| Kilgore-Wernecke Gas Unit G-4-167253 | Block "T" Petroleum, Inc. | Rosita, E. (Wilcox Cons.) | Duval | 1 | 0 | 17.5M | Dec 1997 – Jul 2026 |
| Frost National Bank 65 G-4-168279 | Block "T" Petroleum, Inc. | Rosita (Wilcox P) | Duval | 1 | 0 | 3.19M | Apr 1998 – Jul 2026 |
| Wernecke, E. D. -A G-4-171982 | Block "T" Petroleum, Inc. | Rosita, NW (Wilcox Cons.) | Duval | 1 | 0 | 980K | Apr 1998 – Jul 2026 |
| E.D. Wernecke G.U. G-4-171990 | Block "T" Petroleum, Inc. | Rosita, NW (Wilcox Cons.) | Duval | 1 | 0 | 6.24M | Mar 1998 – Jul 2026 |
| Wernecke, Ernest D. East G-4-178013 | Block "T" Petroleum, Inc. | Rosita, W. (Wilcox) | Duval | 1 | 0 | 445K | Jun 2000 – Jul 2026 |
| Weatherby-Weatherby GU G-4-180574 | Block "T" Petroleum, Inc. | Rosita, NW (Wilcox Cons.) | Duval | 1 | 0 | 6.78M | Dec 2000 – Jul 2026 |
| Muzza, G. P. G-4-181139 | Block "T" Petroleum, Inc. | Fandango (Wilcox Consolidated) | Zapata | 1 | 0 | 25.6M | Dec 2000 – Jul 2026 |
| G. G. Hinojosa G-4-184344 | Block "T" Petroleum, Inc. | Fandango (Wilcox Consolidated) | Zapata | 1 | 0 | 9.68M | Jul 2001 – Jul 2026 |
| Trevino, A. G-4-184483 | Block "T" Petroleum, Inc. | Fandango (Wilcox Consolidated) | Zapata | 1 | 0 | 1.06M | Jul 2001 – Jul 2026 |
| L. C. Weatherby East Gas Unit G-4-185835 | Block "T" Petroleum, Inc. | Rosita, E. (Wilcox Cons.) | Duval | 1 | 0 | 2.29M | Oct 2001 – Jul 2026 |
| Weatherby-Weatherby GU G-4-188051 | Block "T" Petroleum, Inc. | Rosita, NW (Wilcox Cons.) | Duval | 1 | 0 | 4M | Feb 2002 – Jul 2026 |
| Weatherby-Weatherby GU G-4-190030 | Block "T" Petroleum, Inc. | Rosita, NW (Wilcox Cons.) | Duval | 1 | 0 | 826K | Jul 2002 – Jul 2026 |
| Zachry, H. B. Company G-4-190220 | Block "T" Petroleum, Inc. | Fandango (Wilcox Consolidated) | Zapata | 1 | 0 | 10.1M | Jun 2002 – Jul 2026 |
| Leyendecker, G. L. G-4-191584 | Block "T" Petroleum, Inc. | Fandango (Wilcox Consolidated) | Zapata | 1 | 0 | 2.1M | Oct 2002 – Jul 2026 |
| Zachry, H. B. Company G-4-196875 | Block "T" Petroleum, Inc. | Fandango (Wilcox Consolidated) | Zapata | 1 | 0 | 1.71M | Aug 2003 – Jul 2026 |
| Dixie Mortgage-Pawelek Gas Unit G-4-206497 | Block "T" Petroleum, Inc. | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 0 | 1.98M | Oct 2004 – Jul 2026 |
| Dixie Mortgage-Pawelek Gas Unit G-4-209102 | Block "T" Petroleum, Inc. | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 0 | 1.22M | Feb 2005 – Jul 2026 |
| Wernecke "B" G-4-210402 | Block "T" Petroleum, Inc. | Rosita, NW (Wilcox Cons.) | Duval | 1 | 0 | 1.9M | May 2005 – Jul 2026 |
| Dixie Mortgage-Pawelek Gas Unit G-4-212866 | Block "T" Petroleum, Inc. | Javelina (Vicksburg Cons.) | Hidalgo | 1 | 0 | 3.14M | Jun 2005 – Jul 2026 |
| Shovlin Vehle/Moore "A" G-4-214907 | Block "T" Petroleum, Inc. | Las Hermanitas (House Sand) | Duval | 1 | 0 | 2.53M | Nov 2005 – Jul 2026 |