| 490391 | Dec 15, 1999 | Dec 15, 1999 | Sonat Exploration Co. - Houston | Webb | Vaquillas Ranch 1627 A #6 | 10,000 | 47937391 |
| 486368 | Aug 3, 1999 | Aug 3, 1999 | Sonat Exploration Co. - Houston | Bee | Dunn #1 | 13,500 | 02532964 |
| 485234 | Jun 16, 1999 | Jun 16, 1999 | Sonat Exploration Co. - Houston | Webb | Vaquillas Ranch 67 #5 | 8,600 | 47937289 |
| 482411 | Feb 2, 1999 | Feb 2, 1999 | Sonat Exploration Co. - Houston | Webb | Vaquillas Ranch A #1365 | 9,600 | 47937223 |
| 482004 | Jan 12, 1999 | Jan 12, 1999 | Sonat Exploration Co. - Houston | Fort Bend | Savage, Helen #1 | 9,500 | 15732034 |
| 480863 | Nov 13, 1998 | Nov 13, 1998 | Sonat Exploration Co. - Houston | Fort Bend | Penkert #1 | 13,000 | 15732028 |
| 480539 | Oct 29, 1998 | Oct 29, 1998 | Sonat Exploration Co. - Houston | Atascosa | Deatley, M. K. #1 | 11,500 | 01334118 |
| 474835 | Apr 1, 1998 | Apr 1, 1998 | Sonat Exploration Co. - Houston | Webb | McKendrick, W. H. #17 | 9,700 | 47936924 |
| 474208 | Mar 12, 1998 | Mar 12, 1998 | Sonat Exploration Co. - Houston | Duval | Clark State #1 | 14,000 | 13138240 |
| 471358 | Dec 17, 1997 | Dec 17, 1997 | Sonat Exploration Co. - Houston | Webb | Martin, S J A #2 | 9,600 | 47936834 |
| 471358Amendment | Dec 17, 1997 | Dec 17, 1997 | Sonat Exploration Co. - Houston | Webb | Martin, S J A #2 | 9,600 | 47936834 |
| 469268 | Oct 24, 1997 | Oct 24, 1997 | Sonat Exploration Co. - Houston | Webb | Martin, S. J. A #1 | 9,600 | 47936798 |
| 469268Amendment | Oct 24, 1997 | Oct 24, 1997 | Sonat Exploration Co. - Houston | Webb | Martin, S. J. A #1 | 9,600 | 47936798 |
| 469267 | Oct 24, 1997 | Oct 24, 1997 | Sonat Exploration Co. - Houston | Webb | Malakoff-Peterson #6 | 7,000 | 47936795 |
| 469205 | Oct 23, 1997 | Oct 23, 1997 | Sonat Exploration Co. - Houston | Webb | Martin, S J #1 | 10,300 | 47936796 |
| 469205Amendment | Oct 23, 1997 | Oct 23, 1997 | Sonat Exploration Co. - Houston | Webb | Martin, S J #1 | 10,300 | 47936796 |
| 469199 | Oct 23, 1997 | Oct 23, 1997 | Sonat Exploration Co. - Houston | Webb | Martin, S J #2 | 9,000 | 47936794 |
| 462304 | May 14, 1997 | May 14, 1997 | Sonat Exploration Co. - Houston | De Witt | Kulawik #3 | 11,000 | 12331765 |
| 460512 | Apr 2, 1997 | Apr 2, 1997 | Sonat Exploration Co. - Houston | Webb | Vaquillas Ranch 1631 #3 | 10,000 | 47936664 |
| 460265 | Mar 26, 1997 | Mar 26, 1997 | Sonat Exploration Co. - Houston | Duval | DCR-State 76/52 #5211 | 3,000 | 13138179 |
| 460264 | Mar 26, 1997 | Mar 26, 1997 | Sonat Exploration Co. - Houston | Duval | DCR-State 76/52 #5212 | 3,000 | 13138178 |
| 459895 | Mar 17, 1997 | Mar 17, 1997 | Sonat Exploration Co. - Houston | Duval | DCR-State 366/76/64/54D #3605 | 9,500 | 13137622 |
| 457779 | Feb 26, 1997 | Feb 26, 1997 | Sonat Exploration Co. - Houston | Webb | Vaquillas Ranch 1631 A #6 | 10,000 | 47936448 |
| 458597 | Feb 18, 1997 | Feb 18, 1997 | Sonat Exploration Co. - Houston | Webb | Vaquillas Ranch 1645 #3 | 10,000 | 47936645 |
| 457843 | Jan 29, 1997 | Jan 29, 1997 | Sonat Exploration Co. - Houston | Webb | Vaquillas Ranch 136A #4 | 10,500 | 47936633 |
| 457843Amendment | Jan 29, 1997 | Jan 29, 1997 | Sonat Exploration Co. - Houston | Webb | Vaquillas Ranch 136A #4 | 10,500 | 47936633 |
| 456267 | Dec 13, 1996 | Dec 13, 1996 | Sonat Exploration Co. - Houston | Webb | Wright-Richter Unit #7ST | 6,700 | 47935317 |
| 455667 | Nov 26, 1996 | Nov 26, 1996 | Sonat Exploration Co. - Houston | Duval | Welders Heirs 215 #2 | 15,000 | 13138154 |
| 450615 | Jul 24, 1996 | Jul 24, 1996 | Sonat Exploration Co. - Houston | Duval | Welders Heirs 215 #1 | 13,200 | 13138121 |
| 450615Amendment | Jul 24, 1996 | Jul 24, 1996 | Sonat Exploration Co. - Houston | Duval | Welders Heirs 215 #1 | 15,000 | 13138121 |
| 449970 | Jul 2, 1996 | Jul 2, 1996 | Sonat Exploration Co. - Houston | Webb | Keidel-Tejones 1664 #9 | 10,300 | 47936524 |
| 449587 | Jun 21, 1996 | Jun 21, 1996 | Sonat Exploration Co. - Houston | Webb | McKendrick, W. H. #16 | 9,280 | 47936429 |
| 449152 | Jun 14, 1996 | Jun 14, 1996 | Sonat Exploration Co. - Houston | Webb | Vaquillas Ranch 1631A #8 | 8,450 | 47936517 |
| 449152Amendment | Jun 14, 1996 | Jun 14, 1996 | Sonat Exploration Co. - Houston | Webb | Vaquillas Ranch 1631A #8 | 8,450 | 47936517 |
| 449152Amendment | Jun 14, 1996 | Jun 14, 1996 | Sonat Exploration Co. - Houston | Webb | Vaquillas Ranch 1631A #8 | 8,450 | 47936517 |
| 448079 | May 13, 1996 | May 13, 1996 | Sonat Exploration Co. - Houston | Webb | Vaquillas Ranch 1631A #7 | 9,500 | 47936498 |
| 447337 | May 13, 1996 | May 13, 1996 | Sonat Exploration Co. - Houston | Duval | Welder Heirs #1 | 9,700 | 13137605 |
| 447378 | Apr 23, 1996 | Apr 23, 1996 | Sonat Exploration Co. - Houston | Liberty | Davis #1 | 12,000 | 29132251 |
| 447146 | Apr 17, 1996 | Apr 17, 1996 | Sonat Exploration Co. - Houston | Webb | Wright, L. A. et Al #14 | 7,000 | 47936484 |
| 445288 | Feb 28, 1996 | Feb 28, 1996 | Sonat Exploration Co. - Houston | Webb | Vaquillas Ranch 135 #2 | 9,900 | 47936450 |
| 445188 | Feb 26, 1996 | Feb 26, 1996 | Sonat Exploration Co. - Houston | Kenedy | Armstrong Ranch #1 | 15,500 | 26131165 |
| 445137 | Feb 23, 1996 | Feb 23, 1996 | Sonat Exploration Co. - Houston | Webb | Vaquillas Ranch 135 A #4 | 9,600 | 47936447 |
| 445136 | Feb 20, 1996 | Feb 20, 1996 | Sonat Exploration Co. - Houston | Webb | Vaquillas Ranch 1631 A #6 | 9,450 | 47936448 |
| 445136Amendment | Feb 20, 1996 | Feb 20, 1996 | Sonat Exploration Co. - Houston | Webb | Vaquillas Ranch 1631 A #6 | 8,000 | 47936448 |
| 444114 | Jan 25, 1996 | Jan 25, 1996 | Sonat Exploration Co. - Houston | Webb | McKendrick, W. H. #16 | 10,500 | 47936429 |
| 443245 | Dec 27, 1995 | Dec 27, 1995 | Sonat Exploration Co. - Houston | Webb | Keidel-Tejones 1664 #8 | 10,500 | 47936408 |
| 443244 | Dec 27, 1995 | Dec 27, 1995 | Sonat Exploration Co. - Houston | Webb | Vaquillas 135A #3 | 10,500 | 47936409 |
| 443244Amendment | Dec 27, 1995 | Dec 27, 1995 | Sonat Exploration Co. - Houston | Webb | Vaquillas 135A #3 | 10,500 | 47936409 |
| 441712 | Dec 1, 1995 | Dec 1, 1995 | Sonat Exploration Co. - Houston | Webb | McKendrick, W. H. #15 | 10,500 | 47936389 |
| 442308 | Nov 28, 1995 | Nov 28, 1995 | Sonat Exploration Co. - Houston | Duval | State 214 #1 | 13,500 | 13138063 |
| 441813 | Nov 10, 1995 | Nov 10, 1995 | Sonat Exploration Co. - Houston | Webb | Benavides, Rosa V. 1927 #5 | 9,000 | 47935792 |
| 441710 | Nov 8, 1995 | Nov 8, 1995 | Sonat Exploration Co. - Houston | Webb | Vela #3 | 7,500 | 47936388 |
| 441710Amendment | Nov 8, 1995 | Nov 8, 1995 | Sonat Exploration Co. - Houston | Webb | Vela #3 | 8,200 | 47936388 |
| 440746 | Oct 10, 1995 | Oct 10, 1995 | Sonat Exploration Co. - Houston | Webb | Wright, L.A. B #12 | 7,500 | 47936378 |
| 440745 | Oct 10, 1995 | Oct 10, 1995 | Sonat Exploration Co. - Houston | Webb | Wright, L.A. A #11 | 7,500 | 47936377 |
| 440328 | Oct 5, 1995 | Oct 5, 1995 | Sonat Exploration Co. - Houston | Wharton | West Bernard Unit #1 | 6,930 | 48133511 |
| 439888 | Sep 14, 1995 | Sep 14, 1995 | Sonat Exploration Co. - Houston | Webb | Johnson #3 | 7,500 | 47936366 |
| 439888Amendment | Sep 14, 1995 | Sep 14, 1995 | Sonat Exploration Co. - Houston | Webb | Johnson #3 | 7,500 | 47936366 |
| 439888Amendment | Sep 14, 1995 | Sep 14, 1995 | Sonat Exploration Co. - Houston | Webb | Johnson #3 | 8,000 | 47936366 |
| 439649 | Sep 6, 1995 | Sep 6, 1995 | Sonat Exploration Co. - Houston | Duval | DCR-State 366/76/64/54D #7604 | 9,000 | 13138054 |
| 438101 | Jul 25, 1995 | Jul 25, 1995 | Sonat Exploration Co. - Houston | Duval | DCR 82 NCT 25 #1 | 7,528 | 13137429 |
| 437885 | Jul 14, 1995 | Jul 14, 1995 | Sonat Exploration Co. - Houston | Webb | Vela #2 | 8,500 | 47936329 |
| 437885Amendment | Jul 14, 1995 | Jul 14, 1995 | Sonat Exploration Co. - Houston | Webb | Vela #2 | 8,500 | 47936329 |
| 434544 | Apr 4, 1995 | Apr 4, 1995 | Sonat Exploration Co. - Houston | Duval | DCR 257 #2 | 2,000 | 13138026 |
| 434346 | Mar 30, 1995 | Mar 30, 1995 | Sonat Exploration Co. - Houston | Duval | DCR-State 260 #10 | 2,000 | 13138024 |
| 433414 | Mar 1, 1995 | Mar 1, 1995 | Sonat Exploration Co. - Houston | Duval | DCR-State 58 #1 | 11,000 | 13138020 |
| 433414Amendment | Mar 1, 1995 | Mar 1, 1995 | Sonat Exploration Co. - Houston | Duval | DCR-State 58 #1 | 11,000 | 13138020 |
| 433414Amendment | Mar 1, 1995 | Mar 1, 1995 | Sonat Exploration Co. - Houston | Duval | DCR-State 58 #1 | 11,000 | 13138020 |
| 431837 | Jan 13, 1995 | Jan 13, 1995 | Sonat Exploration Co. - Houston | Duval | DCR 208 #1 | 8,500 | 13138007 |
| 431836 | Jan 13, 1995 | Jan 13, 1995 | Sonat Exploration Co. - Houston | Duval | DCR-State 260 #9 | 2,000 | 13138008 |
| 430864 | Jan 6, 1995 | Jan 6, 1995 | Sonat Exploration Co. - Houston | Webb | Vaquillas 1627 #5 | 10,500 | 47936239 |
| 431536 | Jan 3, 1995 | Jan 3, 1995 | Sonat Exploration Co. - Houston | Webb | Vaquillas 1953A #5 | 10,300 | 47936250 |
| 431536Amendment | Jan 3, 1995 | Jan 3, 1995 | Sonat Exploration Co. - Houston | Webb | Vaquillas 1953A #5 | 10,300 | 47936250 |
| 431079 | Dec 16, 1994 | Dec 16, 1994 | Sonat Exploration Co. - Houston | Brazoria | Farms, I.P. #1 | 15,500 | 03932539 |
| 431078 | Dec 16, 1994 | Dec 16, 1994 | Sonat Exploration Co. - Houston | De Witt | Kulawik #3 | 12,000 | 12331765 |
| 429530 | Oct 28, 1994 | Oct 28, 1994 | Sonat Exploration Co. - Houston | Duval | DCR-State 260 #8 | 2,000 | 13137987 |
| 428140 | Oct 18, 1994 | Oct 18, 1994 | Sonat Exploration Co. - Houston | Webb | Vaquillas 1953 #4 | 10,500 | 47936189 |
| 428374 | Sep 23, 1994 | Sep 23, 1994 | Sonat Exploration Co. - Houston | Webb | Hilltop Farm, Ltd. #1 | 8,000 | 47936195 |
| 428018 | Sep 13, 1994 | Sep 13, 1994 | Sonat Exploration Co. - Houston | Webb | McKendrick, W.H. et Al #14 | 10,500 | 47936186 |
| 428017 | Sep 13, 1994 | Sep 13, 1994 | Sonat Exploration Co. - Houston | Duval | DCR-State 76/52 #5201 | 2,000 | 13137561 |
| 427897 | Sep 9, 1994 | Sep 9, 1994 | Sonat Exploration Co. - Houston | Webb | Vaquillas Ranch 1627 #4 | 10,500 | 47936178 |
| 426762 | Sep 7, 1994 | Sep 7, 1994 | Sonat Exploration Co. - Houston | Duval | DCR 261 #5 | 8,000 | 13137961 |
| 427665 | Sep 1, 1994 | Sep 1, 1994 | Sonat Exploration Co. - Houston | Webb | Keidel-Tejones 1664 #7 | 10,500 | 47936174 |
| 426765 | Aug 17, 1994 | Aug 17, 1994 | Sonat Exploration Co. - Houston | Duval | DCR-State 76/52 #7610 | 3,300 | 13137962 |
| 426939 | Aug 12, 1994 | Aug 12, 1994 | Sonat Exploration Co. - Houston | Webb | McKendrick #13 | 10,500 | 47936162 |
| 426939Amendment | Aug 12, 1994 | Aug 12, 1994 | Sonat Exploration Co. - Houston | Webb | McKendrick #13 | 10,500 | 47936162 |
| 426764 | Aug 8, 1994 | Aug 8, 1994 | Sonat Exploration Co. - Houston | Duval | DCR-State 260 #7 | 2,200 | 13137959 |
| 426763 | Aug 8, 1994 | Aug 8, 1994 | Sonat Exploration Co. - Houston | Duval | DCR 367 #5 | 2,050 | 13137960 |
| 426637 | Aug 4, 1994 | Aug 4, 1994 | Sonat Exploration Co. - Houston | Duval | DCR 95 #2 | 3,000 | 13137818 |
| 425592 | Aug 2, 1994 | Aug 2, 1994 | Sonat Exploration Co. - Houston | Duval | DCR 75 #2 | 9,000 | 13137951 |
| 426174 | Jul 22, 1994 | Jul 22, 1994 | Sonat Exploration Co. - Houston | Duval | DCR 262 #1A | 10,000 | 13111129 |
| 426173 | Jul 22, 1994 | Jul 22, 1994 | Sonat Exploration Co. - Houston | Webb | McKendrick #12 | 10,500 | 47936148 |
| 426078 | Jul 20, 1994 | Jul 20, 1994 | Sonat Exploration Co. - Houston | Webb | McKendrick #1 | 10,500 | 47933661 |
| 425876 | Jul 14, 1994 | Jul 14, 1994 | Sonat Exploration Co. - Houston | Duval | DCR 57A #5 | 9,100 | 13137955 |
| 425656 | Jul 7, 1994 | Jul 7, 1994 | Sonat Exploration Co. - Houston | Webb | McKendrick #11 | 10,500 | 47936135 |
| 425593 | Jul 5, 1994 | Jul 5, 1994 | Sonat Exploration Co. - Houston | Duval | DCR-State 366/76/64/54 D #7603 | 9,400 | 13137952 |
| 424940 | Jun 15, 1994 | Jun 15, 1994 | Sonat Exploration Co. - Houston | Duval | Dcrc-St 366/76/64/54 #5409 | 3,000 | 13137946 |
| 424019 | May 17, 1994 | May 17, 1994 | Sonat Exploration Co. - Houston | Webb | Wright, L A #10 | 6,700 | 47935897 |
| 422761 | May 13, 1994 | May 13, 1994 | Sonat Exploration Co. - Houston | Webb | McKendrick, W.H. et Al #5A | 10,500 | 47935732 |
| 422799 | Apr 29, 1994 | Apr 29, 1994 | Sonat Exploration Co. - Houston | Zapata | Salinas, Octavio Gas Unit #4 | 8,600 | 50533180 |