| 490613 | Dec 22, 1999 | Dec 22, 1999 | Sonat Exploration Company -Tyler | Panola | Hogg, Allie M. #9 | 9,900 | 36534300 |
| 490178 | Dec 9, 1999 | Dec 9, 1999 | Sonat Exploration Company -Tyler | Panola | McGee, Scott R. #9 | 9,900 | 36534293 |
| 490163 | Dec 8, 1999 | Dec 8, 1999 | Sonat Exploration Company -Tyler | Freestone | Webb Unit A #1 | 13,500 | 16131682 |
| 488825 | Oct 25, 1999 | Oct 25, 1999 | Sonat Exploration Company -Tyler | Panola | Holcombe #7 | 10,020 | 36532769 |
| 487772 | Sep 20, 1999 | Sep 20, 1999 | Sonat Exploration Company -Tyler | Freestone | Robinson #2 | 11,670 | 16130160 |
| 487141 | Aug 31, 1999 | Aug 31, 1999 | Sonat Exploration Company -Tyler | Henderson | Parker, Sarah #2 | 10,500 | 21330795 |
| 486284 | Aug 24, 1999 | Aug 24, 1999 | Sonat Exploration Company -Tyler | Leon | Blazek #4 | 17,000 | 28931230 |
| 485133 | Jun 10, 1999 | Jun 10, 1999 | Sonat Exploration Company -Tyler | Freestone | Sneed Gas Unit #5 | 11,402 | 16131448 |
| 484594 | May 17, 1999 | May 17, 1999 | Sonat Exploration Company -Tyler | Panola | Liston, W. L. #3C | 8,200 | 36531974 |
| 483778 | Apr 9, 1999 | Apr 9, 1999 | Sonat Exploration Company -Tyler | Gregg | Spear #1 | 10,958 | 18330627 |
| 483181 | Mar 9, 1999 | Mar 9, 1999 | Sonat Exploration Company -Tyler | Panola | Robert Walton Gas Unit #3 | 9,870 | 36531540 |
| 483104 | Mar 5, 1999 | Mar 5, 1999 | Sonat Exploration Company -Tyler | Freestone | Sneed Gas Unit #6 | 10,800 | 16131569 |
| 483101 | Mar 5, 1999 | Mar 5, 1999 | Sonat Exploration Company -Tyler | Freestone | Ruby Middleton Gas Unit #5 | 11,400 | 16131443 |
| 480926 | Feb 16, 1999 | Feb 16, 1999 | Sonat Exploration Company -Tyler | Gregg | Hayes #8 | 10,700 | 18331344 |
| 482168 | Jan 21, 1999 | Jan 21, 1999 | Sonat Exploration Company -Tyler | Freestone | Cummins A #1 | 12,800 | 16131555 |
| 482006 | Jan 12, 1999 | Jan 12, 1999 | Sonat Exploration Company -Tyler | Freestone | Sneed Gas Unit #7 | 12,000 | 16131481 |
| 482005 | Jan 12, 1999 | Jan 12, 1999 | Sonat Exploration Company -Tyler | Freestone | Yeldell Unit #1 | 8,164 | 16130550 |
| 481912 | Jan 12, 1999 | Jan 12, 1999 | Sonat Exploration Company -Tyler | Leon | Hunter Gas Unit #5 | 15,000 | 28931203 |
| 481522 | Dec 14, 1998 | Dec 14, 1998 | Sonat Exploration Company -Tyler | Henderson | Parker, Sarah #1 | 11,200 | 21330790 |
| 480988 | Nov 18, 1998 | Nov 18, 1998 | Sonat Exploration Company -Tyler | Lamar | Ground #1 | 5,400 | 27730120 |
| 480716 | Nov 6, 1998 | Nov 6, 1998 | Sonat Exploration Company -Tyler | Freestone | Northen Gas Unit #3 | 12,215 | 16131238 |
| 480713 | Nov 6, 1998 | Nov 6, 1998 | Sonat Exploration Company -Tyler | Freestone | Wiebolt #2 | 12,700 | 16131545 |
| 480541 | Oct 29, 1998 | Oct 29, 1998 | Sonat Exploration Company -Tyler | Collin | Keim #1 | 7,500 | 08530115 |
| 480540 | Oct 29, 1998 | Oct 29, 1998 | Sonat Exploration Company -Tyler | Delta | Olson #1 | 6,400 | 11930118 |
| 480320 | Oct 20, 1998 | Oct 20, 1998 | Sonat Exploration Company -Tyler | Freestone | Northen Gas Unit #7 | 11,153 | 16131447 |
| 480026 | Oct 8, 1998 | Oct 8, 1998 | Sonat Exploration Company -Tyler | Freestone | Davidson, W. A. #1 | 12,700 | 16131534 |
| 480026Amendment | Oct 8, 1998 | Oct 8, 1998 | Sonat Exploration Company -Tyler | Freestone | Davidson, W. A. #1 | 12,700 | 16131534 |
| 479988 | Oct 7, 1998 | Oct 7, 1998 | Sonat Exploration Company -Tyler | Panola | Hogg, Allie Marie #6 | 9,875 | 36532112 |
| 479758 | Sep 28, 1998 | Sep 28, 1998 | Sonat Exploration Company -Tyler | Freestone | Eubank, J. H. #1A | 8,485 | 16130156 |
| 479757 | Sep 28, 1998 | Sep 28, 1998 | Sonat Exploration Company -Tyler | Freestone | Reed GU #4 #3 | 12,290 | 16131352 |
| 479196 | Sep 1, 1998 | Sep 1, 1998 | Sonat Exploration Company -Tyler | Panola | Womack #3 | 8,161 | 36531914 |
| 476209 | Jun 11, 1998 | Jun 11, 1998 | Sonat Exploration Company -Tyler | Gregg | Allen, Mary B. #3 | 11,200 | 18330980 |
| 475808 | Apr 29, 1998 | Apr 29, 1998 | Sonat Exploration Company -Tyler | Freestone | McMichael #1 | 8,517 | 16130179 |
| 475805 | Apr 29, 1998 | Apr 29, 1998 | Sonat Exploration Company -Tyler | Shelby | Stephens, G. H. #8 | 8,800 | 41930701 |
| 475805Amendment | Apr 29, 1998 | Apr 29, 1998 | Sonat Exploration Company -Tyler | Shelby | Stephens, G. H. #8 | 8,800 | 41930701 |
| 475263 | Apr 13, 1998 | Apr 13, 1998 | Sonat Exploration Company -Tyler | Shelby | Stephens, G. H. #6 | 8,800 | 41930700 |
| 474561 | Mar 19, 1998 | Mar 19, 1998 | Sonat Exploration Company -Tyler | Gregg | Spear #2 | 11,200 | 18330923 |
| 474478 | Mar 18, 1998 | Mar 18, 1998 | Sonat Exploration Company -Tyler | Freestone | Reed GU #4 #6 | 12,000 | 16131487 |
| 474442 | Mar 17, 1998 | Mar 17, 1998 | Sonat Exploration Company -Tyler | Panola | Black, C. O. #6 | 10,000 | 36533888 |
| 474440 | Mar 17, 1998 | Mar 17, 1998 | Sonat Exploration Company -Tyler | Henderson | Parmer #1 | 18,500 | 21330786 |
| 473165 | Mar 9, 1998 | Mar 9, 1998 | Sonat Exploration Company -Tyler | Cherokee | Little #8 | 11,000 | 07330930 |
| 474112 | Mar 6, 1998 | Mar 6, 1998 | Sonat Exploration Company -Tyler | Panola | Holcombe #8 | 10,000 | 36533898 |
| 474112Amendment | Mar 6, 1998 | Mar 6, 1998 | Sonat Exploration Company -Tyler | Panola | Holcombe #8 | 10,000 | 36533898 |
| 474111 | Mar 6, 1998 | Mar 6, 1998 | Sonat Exploration Company -Tyler | Gregg | Spear #6 | 11,200 | 18330979 |
| 473165Amendment | Mar 4, 1998 | Mar 4, 1998 | Sonat Exploration Company -Tyler | Cherokee | Little #8 | 11,000 | 07330930 |
| 473570 | Feb 19, 1998 | Feb 19, 1998 | Sonat Exploration Company -Tyler | Gregg | Spear #3 | 11,520 | 18330929 |
| 473569 | Feb 19, 1998 | Feb 19, 1998 | Sonat Exploration Company -Tyler | Panola | Moreland #9 | 10,000 | 36533890 |
| 473508 | Feb 18, 1998 | Feb 18, 1998 | Sonat Exploration Company -Tyler | Freestone | Sneed Gas Unit #7 | 12,000 | 16131481 |
| 473451 | Feb 17, 1998 | Feb 17, 1998 | Sonat Exploration Company -Tyler | Shelby | Stephens, G. H. #7 | 8,700 | 41930698 |
| 473451Amendment | Feb 17, 1998 | Feb 17, 1998 | Sonat Exploration Company -Tyler | Shelby | Stephens, G. H. #7 | 8,700 | 41930698 |
| 473449 | Feb 17, 1998 | Feb 17, 1998 | Sonat Exploration Company -Tyler | Panola | Black, C. O. #5 | 10,000 | 36533886 |
| 473449Amendment | Feb 17, 1998 | Feb 17, 1998 | Sonat Exploration Company -Tyler | Panola | Black, C. O. #5 | 10,000 | 36533886 |
| 473447 | Feb 17, 1998 | Feb 17, 1998 | Sonat Exploration Company -Tyler | Panola | Black, Vera #7 | 10,000 | 36533887 |
| 473447Amendment | Feb 17, 1998 | Feb 17, 1998 | Sonat Exploration Company -Tyler | Panola | Black, Vera #7 | 10,000 | 36533887 |
| 473447Amendment | Feb 17, 1998 | Feb 17, 1998 | Sonat Exploration Company -Tyler | Panola | Black, Vera #7 | 10,000 | 36533887 |
| 473090 | Feb 6, 1998 | Feb 6, 1998 | Sonat Exploration Company -Tyler | Cherokee | Gardiner Estate #4 | 11,000 | 07330928 |
| 473090Amendment | Feb 6, 1998 | Feb 6, 1998 | Sonat Exploration Company -Tyler | Cherokee | Gardiner Estate #4 | 11,000 | 07330928 |
| 473086 | Feb 6, 1998 | Feb 6, 1998 | Sonat Exploration Company -Tyler | Freestone | Sneed Gas Unit #5 | 11,800 | 16131448 |
| 473084 | Feb 6, 1998 | Feb 6, 1998 | Sonat Exploration Company -Tyler | Cherokee | Gardiner Estate #5 | 11,000 | 07330929 |
| 472955 | Feb 4, 1998 | Feb 4, 1998 | Sonat Exploration Company -Tyler | Freestone | Northern Gas Unit #8 | 12,000 | 16131477 |
| 472954 | Feb 4, 1998 | Feb 4, 1998 | Sonat Exploration Company -Tyler | Freestone | Northern Gas Unit #9 | 12,000 | 16131476 |
| 472876 | Feb 2, 1998 | Feb 2, 1998 | Sonat Exploration Company -Tyler | Freestone | Williford, C. N. #3 | 12,000 | 16131475 |
| 472690 | Jan 27, 1998 | Jan 27, 1998 | Sonat Exploration Company -Tyler | Shelby | O. L. Guy Travis Peak Unit #11 | 8,500 | 41930697 |
| 472690Amendment | Jan 27, 1998 | Jan 27, 1998 | Sonat Exploration Company -Tyler | Shelby | O. L. Guy Travis Peak Unit #11 | 8,500 | 41930697 |
| 472690Amendment | Jan 27, 1998 | Jan 27, 1998 | Sonat Exploration Company -Tyler | Shelby | O. L. Guy Travis Peak Unit #11 | 8,700 | 41930697 |
| 472689 | Jan 27, 1998 | Jan 27, 1998 | Sonat Exploration Company -Tyler | Panola | Hogg, Allie M. #8 | 10,000 | 36533874 |
| 472688 | Jan 27, 1998 | Jan 27, 1998 | Sonat Exploration Company -Tyler | Rusk | McDavid, J. W. Unit 1 #8 | 11,500 | 40132841 |
| 472279 | Jan 15, 1998 | Jan 15, 1998 | Sonat Exploration Company -Tyler | Red River | Foy #1 | 5,700 | 38730539 |
| 471858 | Jan 5, 1998 | Jan 5, 1998 | Sonat Exploration Company -Tyler | Leon | Blanton, Jack #1 | 15,500 | 28931284 |
| 471817 | Jan 2, 1998 | Jan 2, 1998 | Sonat Exploration Company -Tyler | Panola | Thomas Allison Gas Unit #8A | 9,850 | 36533858 |
| 471779 | Dec 31, 1997 | Dec 31, 1997 | Sonat Exploration Company -Tyler | Freestone | Williford, C. N. #2 | 11,750 | 16131471 |
| 471423 | Dec 18, 1997 | Dec 18, 1997 | Sonat Exploration Company -Tyler | Panola | Liston, W. L. #5 | 7,100 | 36533852 |
| 470257 | Dec 16, 1997 | Dec 16, 1997 | Sonat Exploration Company -Tyler | Gregg | Judge Daniels G. U. 1 #5 | 9,000 | 18331298 |
| 471253 | Dec 15, 1997 | Dec 15, 1997 | Sonat Exploration Company -Tyler | Rusk | J. W. McDavid Unit 1 #5 | 11,500 | 40132821 |
| 471253Amendment | Dec 15, 1997 | Dec 15, 1997 | Sonat Exploration Company -Tyler | Rusk | J. W. McDavid Unit 1 #5 | 11,500 | 40132821 |
| 471156 | Dec 12, 1997 | Dec 12, 1997 | Sonat Exploration Company -Tyler | Freestone | Boatmen Trust Co. GU #2 #1 | 11,500 | 16131467 |
| 471155 | Dec 12, 1997 | Dec 12, 1997 | Sonat Exploration Company -Tyler | Panola | Hodge, F. L. #6 | 7,100 | 36533842 |
| 471155Amendment | Dec 12, 1997 | Dec 12, 1997 | Sonat Exploration Company -Tyler | Panola | Hodge, F. L. #6 | 7,100 | 36533842 |
| 471154 | Dec 12, 1997 | Dec 12, 1997 | Sonat Exploration Company -Tyler | Cherokee | Gardiner Estate #3 | 11,000 | 07330922 |
| 471154Amendment | Dec 12, 1997 | Dec 12, 1997 | Sonat Exploration Company -Tyler | Cherokee | Gardiner Estate #3 | 11,000 | 07330922 |
| 471128 | Dec 11, 1997 | Dec 11, 1997 | Sonat Exploration Company -Tyler | Cherokee | Little #7 | 11,000 | 07330921 |
| 471128Amendment | Dec 11, 1997 | Dec 11, 1997 | Sonat Exploration Company -Tyler | Cherokee | Little #7 | 11,000 | 07330921 |
| 471054 | Dec 10, 1997 | Dec 10, 1997 | Sonat Exploration Company -Tyler | Rusk | J. W. McDavid Unit 1 #7 | 11,500 | 40132818 |
| 470602 | Nov 26, 1997 | Nov 26, 1997 | Sonat Exploration Company -Tyler | Freestone | Kelly #1 | 15,000 | 16131464 |
| 470431 | Nov 21, 1997 | Nov 21, 1997 | Sonat Exploration Company -Tyler | Panola | Thomas Allison Gas Unit #9A | 9,850 | 36533824 |
| 470431Amendment | Nov 21, 1997 | Nov 21, 1997 | Sonat Exploration Company -Tyler | Panola | Thomas Allison Gas Unit #9A | 9,850 | 36533824 |
| 470346 | Nov 20, 1997 | Nov 20, 1997 | Sonat Exploration Company -Tyler | Cherokee | Holcomb-Little #7 | 11,000 | 07330915 |
| 470346Amendment | Nov 20, 1997 | Nov 20, 1997 | Sonat Exploration Company -Tyler | Cherokee | Holcomb-Little #7 | 11,000 | 07330915 |
| 470344 | Nov 20, 1997 | Nov 20, 1997 | Sonat Exploration Company -Tyler | Shelby | Pickering Lumber Co. 'B' #14 | 8,500 | 41931087 |
| 470135 | Nov 14, 1997 | Nov 14, 1997 | Sonat Exploration Company -Tyler | Rusk | J. W. McDavid Unit 1 #6 | 11,500 | 40132801 |
| 470037 | Nov 12, 1997 | Nov 12, 1997 | Sonat Exploration Company -Tyler | Leon | Holmes #1 | 16,250 | 28931279 |
| 469845 | Nov 7, 1997 | Nov 7, 1997 | Sonat Exploration Company -Tyler | Shelby | Stephens, G. H. #5 | 9,800 | 41930694 |
| 469603 | Nov 3, 1997 | Nov 3, 1997 | Sonat Exploration Company -Tyler | Cherokee | Holcomb #3 | 11,100 | 07330911 |
| 469380 | Oct 28, 1997 | Oct 28, 1997 | Sonat Exploration Company -Tyler | Cherokee | Holcomb-Allen #1 | 8,500 | 07330909 |
| 469019 | Oct 20, 1997 | Oct 20, 1997 | Sonat Exploration Company -Tyler | Freestone | McGrew #1 | 16,000 | 16131457 |
| 469019Amendment | Oct 20, 1997 | Oct 20, 1997 | Sonat Exploration Company -Tyler | Freestone | McGrew #1 | 16,000 | 16131457 |
| 469018 | Oct 20, 1997 | Oct 20, 1997 | Sonat Exploration Company -Tyler | Cherokee | Little #6 | 11,000 | 07330908 |
| 469018Amendment | Oct 20, 1997 | Oct 20, 1997 | Sonat Exploration Company -Tyler | Cherokee | Little #6 | 11,000 | 07330908 |
| 467694 | Sep 17, 1997 | Sep 17, 1997 | Sonat Exploration Company -Tyler | Panola | Womack #6 | 9,800 | 36532178 |
| 467617 | Sep 15, 1997 | Sep 15, 1997 | Sonat Exploration Company -Tyler | Leon | Ladd #1 | 15,500 | 28931275 |