| Reitzer O-1-10943 | Great Plains Resources, Inc. | Somerset | Bexar | 5 | 364 | 18 | by Jan 1993 – Dec 1997 |
| McOsker O-1-10904 | Great Plains Resources, Inc. | Somerset | Bexar | 3 | 355 | 4 | by Jan 1993 – Apr 1998 |
| Cooper Unit O-1-6418 | Great Plains Resources, Inc. | Somerset | Atascosa | 6 | 350 | 13 | by Jan 1993 – May 1998 |
| Wright, Pierce -A- O-1-2001 | Great Plains Resources, Inc. | Spiller | Guadalupe | 2 | 344 | 20 | by Jan 1993 – Jul 1997 |
| Gutierrez, Leonires O-1-10934 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 343 | 18 | by Jan 1993 – Apr 1998 |
| Lanford, P.B. O-1-8638 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 339 | 25 | by Jan 1993 – Oct 1995 |
| Pickens, John Z. III O-1-6472 | Great Plains Resources, Inc. | Somerset | Atascosa | 1 | 331 | 18 | by Jan 1993 – Apr 1997 |
| Hughes, R. T. -A- O-1-1626 | Great Plains Resources, Inc. | Somerset | Atascosa | 19 | 326 | 14 | Apr 1993 – May 1998 |
| Miller, M. O-1-1636 | Great Plains Resources, Inc. | Somerset | Atascosa | 24 | 324 | 16 | Mar 1993 – May 1998 |
| Poage O-1-11660 | Great Plains Resources, Inc. | Somerset | Bexar | 3 | 318 | 22 | by Jan 1993 – Oct 1995 |
| Fields, Kenneth O-1-10926 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 316 | 19 | by Jan 1993 – Apr 1998 |
| Mitchell, J. C. O-1-3650 | Great Plains Resources, Inc. | Tenney Creek | Caldwell | 2 | 315 | 2 | Feb 1993 – Aug 1997 |
| Hinton, R.S. -A- O-1-8206 | Great Plains Resources, Inc. | Somerset | Bexar | 1 | 314 | 16 | May 1993 – Oct 1997 |
| Stubblefield, D.C. O-1-11091 | Great Plains Resources, Inc. | Somerset | Atascosa | 2 | 300 | 15 | by Jan 1993 – Nov 1997 |
| Fowler, Ima -B- O-1-6459 | Great Plains Resources, Inc. | Somerset | Atascosa | 1 | 297 | 21 | by Jan 1993 – Apr 1997 |
| Chapman O-1-1036 | Great Plains Resources, Inc. | Luling-Branyon | Caldwell | 6 | 296 | 0 | Mar 1995 – Jul 1997 |
| Avant -E- O-1-11307 | Great Plains Resources, Inc. | Somerset | Bexar | 4 | 291 | 13 | by Jan 1993 – Apr 1998 |
| Cunningham Unit O-1-10936 | Great Plains Resources, Inc. | Somerset | Bexar | 4 | 288 | 14 | by Jan 1993 – Dec 1997 |
| Ernst O-1-11764 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 288 | 21 | by Jan 1993 – Oct 1995 |
| Fee O-1-10994 | Great Plains Resources, Inc. | Somerset | Bexar | 7 | 284 | 21 | by Jan 1993 – Apr 1998 |
| Fowler, Ima 'A' O-1-6458 | Great Plains Resources, Inc. | Somerset | Atascosa | 1 | 283 | 17 | Mar 1993 – Jan 1997 |
| Miller, Cecil O-1-11147 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 272 | 8 | May 1994 – Jan 1998 |
| Eklund, Carl, Jr. O-1-2978 | Great Plains Resources, Inc. | Salt Flat | Caldwell | 5 | 272 | 907 | by Jan 1993 – Sep 1997 |
| Armstrong -A- O-1-11308 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 267 | 14 | by Jan 1993 – Oct 1995 |
| Griffith O-1-11007 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 264 | 19 | by Jan 1993 – Dec 1997 |
| Bursell -A- O-1-10978 | Great Plains Resources, Inc. | Somerset | Bexar | 4 | 263 | 11 | by Jan 1993 – Apr 1998 |
| Lueders O-1-11255 | Great Plains Resources, Inc. | Somerset | Bexar | 6 | 260 | 15 | by Jan 1993 – Apr 1998 |
| Anderson, James D. O-1-10871 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 260 | 26 | by Jan 1993 – Nov 1997 |
| Cooper -P-2 O-1-11537 | Great Plains Resources, Inc. | Somerset | Atascosa | 2 | 250 | 25 | by Jan 1993 – May 1998 |
| Dunn, Alice O-1-1612 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 243 | 12 | by Jan 1993 – Jun 1997 |
| Hubbard, Willa-Harbo "1985" O-1-11422 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 243 | 20 | by Jan 1993 – Oct 1995 |
| Pickens, Stage -D- O-1-11076 | Great Plains Resources, Inc. | Somerset | Atascosa | 11 | 237 | 7 | Aug 1993 – May 1998 |
| Morris, Beulah O-1-10508 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 235 | 14 | Mar 1993 – Apr 1998 |
| Lopez O-1-11023 | Great Plains Resources, Inc. | Somerset | Bexar | 7 | 233 | 15 | by Jan 1993 – Dec 1997 |
| Sal-Mar Unit O-1-10838 | Great Plains Resources, Inc. | Somerset | Bexar | 6 | 226 | 12 | Apr 1993 – Oct 1995 |
| Murry O-1-11029 | Great Plains Resources, Inc. | Somerset | Bexar | 6 | 222 | 14 | by Jan 1993 – Apr 1998 |
| Mullens O-1-11028 | Great Plains Resources, Inc. | Somerset | Bexar | 1 | 219 | 11 | by Jan 1993 – Apr 1998 |
| Stubblefield O-1-10809 | Great Plains Resources, Inc. | Somerset | Atascosa | 1 | 215 | 14 | by Jan 1993 – Dec 1997 |
| Hartfield O-1-12052 | Great Plains Resources, Inc. | La Vernia | Guadalupe | 7 | 215 | 4 | Oct 1993 – Oct 1995 |
| Williams, Minnie E. O-1-1650 | Great Plains Resources, Inc. | Somerset | Bexar | 1 | 213 | 16 | by Jan 1993 – Oct 1997 |
| Avant -F- O-1-11156 | Great Plains Resources, Inc. | Somerset | Bexar | 5 | 209 | 16 | by Jan 1993 – Apr 1998 |
| Finck, O.H. O-1-10995 | Great Plains Resources, Inc. | Somerset | Bexar | 8 | 207 | 19 | by Jan 1993 – Apr 1998 |
| Koehler, A&v O-1-6993 | Great Plains Resources, Inc. | Somerset | Bexar | 1 | 204 | 14 | May 1993 – Dec 1995 |
| Wright, Pierce O-1-1676 | Great Plains Resources, Inc. | Spiller | Guadalupe | 1 | 204 | 18 | by Jan 1993 – Aug 1997 |
| Cooper -A- O-1-11671 | Great Plains Resources, Inc. | Somerset | Atascosa | 2 | 201 | 12 | by Jan 1993 – May 1998 |
| Avant -C- O-1-10967 | Great Plains Resources, Inc. | Somerset | Bexar | 2 | 199 | 16 | by Jan 1993 – Apr 1998 |
| Halliburton-Barton Unit O-1-11184 | Great Plains Resources, Inc. | Somerset | Bexar | 15 | 196 | 24 | by Jan 1993 – Oct 1995 |
| Armstrong -B- O-1-11312 | Great Plains Resources, Inc. | Somerset | Bexar | 3 | 191 | 21 | Feb 1993 – Oct 1995 |
| Hubbard-Harbo O-1-11421 | Great Plains Resources, Inc. | Somerset | Bexar | 1 | 191 | 11 | by Jan 1993 – Apr 1998 |
| Koehler, Otillie O-1-6994 | Great Plains Resources, Inc. | Somerset | Bexar | 1 | 188 | 22 | by Jan 1993 – Oct 1995 |