| 475384 | Jun 10, 1998 | Jun 10, 1998 | Pennzoil Exploration & Prod. Co. | Borden | Canon Ranch Unit #1507 | 7,600 | 03331714 |
| 477099 | Jun 7, 1998 | Jun 7, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Youngblood-Roe Unit #12 | 9,700 | 36533980 |
| 476678 | Jun 3, 1998 | Jun 3, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Wilson Unit #9 | 9,750 | 36533967 |
| 476804 | Jun 2, 1998 | Jun 2, 1998 | Pennzoil Exploration & Prod. Co. | Zapata | Garza, Lauro #E8 | 10,000 | 50533102 |
| 476667 | May 28, 1998 | May 28, 1998 | Pennzoil Exploration & Prod. Co. | Winkler | Vest Ranch #20 | 8,900 | 49532726 |
| 476383 | May 19, 1998 | May 19, 1998 | Pennzoil Exploration & Prod. Co. | Scurry | Sacroc Unit #173-12 | 7,200 | 41533687 |
| 476261 | May 18, 1998 | May 18, 1998 | Pennzoil Exploration & Prod. Co. | Winkler | Baird, W. E. #1954E | 10,700 | 49532720 |
| 476255 | May 13, 1998 | May 13, 1998 | Pennzoil Exploration & Prod. Co. | Refugio | Lambert, M. F. #147 | 5,750 | 39131456 |
| 476116 | May 13, 1998 | May 13, 1998 | Pennzoil Exploration & Prod. Co. | Hansford | Schaub, Julian #1 | 6,750 | 19530002 |
| 475254 | May 13, 1998 | May 13, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Cavin Unit #8 | 9,700 | 36533932 |
| 475254Amendment | May 13, 1998 | May 13, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Cavin Unit #8 | 9,700 | 36533932 |
| 475254Amendment | May 13, 1998 | May 13, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Cavin Unit #8 | 9,700 | 36533932 |
| 476096 | May 7, 1998 | May 7, 1998 | Pennzoil Exploration & Prod. Co. | Winkler | Baird, W. E. #1382E | 10,700 | 49532723 |
| 476017 | May 5, 1998 | May 5, 1998 | Pennzoil Exploration & Prod. Co. | Zapata | Jennings #60 | 8,400 | 50532563 |
| 475955 | May 4, 1998 | May 4, 1998 | Pennzoil Exploration & Prod. Co. | Zapata | Haynes #13 | 9,200 | 50533157 |
| 475885 | May 1, 1998 | May 1, 1998 | Pennzoil Exploration & Prod. Co. | Zapata | Jennings #67D | 8,155 | 50533687 |
| 475847 | May 1, 1998 | May 1, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Moore Unit #12 | 8,500 | 36533948 |
| 475847Amendment | May 1, 1998 | May 1, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Moore Unit #12 | 8,500 | 36533948 |
| 475528 | Apr 22, 1998 | Apr 22, 1998 | Pennzoil Exploration & Prod. Co. | Zapata | Jennings #28WD | 5,000 | 50530553 |
| 475528Amendment | Apr 22, 1998 | Apr 22, 1998 | Pennzoil Exploration & Prod. Co. | Zapata | Jennings #28WD | 5,500 | 50530553 |
| 475527 | Apr 22, 1998 | Apr 22, 1998 | Pennzoil Exploration & Prod. Co. | Zapata | Jennings #35WD | 5,000 | 50533797 |
| 475527Amendment | Apr 22, 1998 | Apr 22, 1998 | Pennzoil Exploration & Prod. Co. | Zapata | Jennings #35WD | 5,500 | 50533797 |
| 475465 | Apr 22, 1998 | Apr 22, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Werner, Louis Saw Mill Co. #18A | 9,900 | 36533941 |
| 475465Amendment | Apr 22, 1998 | Apr 22, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Werner, Louis Saw Mill Co. #18A | 9,900 | 36533941 |
| 475465Amendment | Apr 22, 1998 | Apr 22, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Werner, Louis Saw Mill Co. #18A | 9,900 | 36533941 |
| 475464 | Apr 22, 1998 | Apr 22, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Chadwick Unit #14 | 8,500 | 36533940 |
| 475333 | Apr 17, 1998 | Apr 17, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Chadwick Unit #15 | 8,500 | 36533936 |
| 475088 | Apr 8, 1998 | Apr 8, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Roberts Unit #12 | 8,035 | 36532993 |
| 474880 | Apr 1, 1998 | Apr 1, 1998 | Pennzoil Exploration & Prod. Co. | Scurry | Sacroc Unit #1745 | 7,200 | 41533684 |
| 474839 | Mar 31, 1998 | Mar 31, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Hull Unit A #A 43 | 6,925 | 36532077 |
| 474764 | Mar 30, 1998 | Mar 30, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Hancock Unit #9 | 9,600 | 36533921 |
| 474725 | Mar 27, 1998 | Mar 27, 1998 | Pennzoil Exploration & Prod. Co. | Crane | McKnight, M. B. #119 | 5,950 | 10332000 |
| 474046 | Mar 5, 1998 | Mar 5, 1998 | Pennzoil Exploration & Prod. Co. | Winkler | Baird, W. E. #1954E | 10,700 | 49532720 |
| 474046Amendment | Mar 5, 1998 | Mar 5, 1998 | Pennzoil Exploration & Prod. Co. | Winkler | Baird, W. E. #1954 | 10,700 | 49532720 |
| 473965 | Mar 4, 1998 | Mar 4, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Hull Unit A #A 35 | 9,640 | 36532016 |
| 473909 | Mar 3, 1998 | Mar 3, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Crenshaw Unit #5 | 9,900 | 36533895 |
| 472636 | Feb 23, 1998 | Feb 23, 1998 | Pennzoil Exploration & Prod. Co. | Ochiltree | Reed, Eleanor #2 | 6,662 | 35730298 |
| 473288 | Feb 19, 1998 | Feb 19, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Tillery Unit #5 | 9,900 | 36533885 |
| 473288Amendment | Feb 19, 1998 | Feb 19, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Tillery Unit #5 | 9,900 | 36533885 |
| 472715 | Jan 28, 1998 | Jan 28, 1998 | Pennzoil Exploration & Prod. Co. | Scurry | Sacroc Unit #147-11 | 7,200 | 41533680 |
| 472714 | Jan 28, 1998 | Jan 28, 1998 | Pennzoil Exploration & Prod. Co. | Scurry | Sacroc Unit #147-12 | 7,200 | 41533679 |
| 472713 | Jan 28, 1998 | Jan 28, 1998 | Pennzoil Exploration & Prod. Co. | Scurry | Sacroc Unit #147-13 | 7,200 | 41533678 |
| 472712 | Jan 28, 1998 | Jan 28, 1998 | Pennzoil Exploration & Prod. Co. | Scurry | Sacroc Unit #174-6 | 7,200 | 41533677 |
| 472710 | Jan 28, 1998 | Jan 28, 1998 | Pennzoil Exploration & Prod. Co. | Scurry | Sacroc Unit #147-10 | 7,200 | 41533676 |
| 472709 | Jan 28, 1998 | Jan 28, 1998 | Pennzoil Exploration & Prod. Co. | Scurry | Sacroc Unit #174-7 | 7,200 | 41533675 |
| 472608 | Jan 28, 1998 | Jan 28, 1998 | Pennzoil Exploration & Prod. Co. | Panola | Allison Unit #2C | 9,614 | 36530824 |
| 470654 | Jan 15, 1998 | Jan 15, 1998 | Pennzoil Exploration & Prod. Co. | Terry | Gordon, M. G. #47 | 7,700 | 44531860 |
| 471710 | Dec 29, 1997 | Dec 29, 1997 | Pennzoil Exploration & Prod. Co. | Nueces | La Jolla #4D | 12,128 | 35532886 |
| 471397 | Dec 29, 1997 | Dec 29, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Wallace Unit #6 | 9,900 | 36533854 |
| 471590 | Dec 23, 1997 | Dec 23, 1997 | Pennzoil Exploration & Prod. Co. | Scurry | Sacroc Unit #118-25 | 7,200 | 41533672 |
| 471589 | Dec 23, 1997 | Dec 23, 1997 | Pennzoil Exploration & Prod. Co. | Scurry | Sacroc Unit #118-24 | 7,200 | 41533671 |
| 471232 | Dec 22, 1997 | Dec 22, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Hull a-21 Unit #A 74 | 9,700 | 36534438 |
| 470273 | Dec 18, 1997 | Dec 18, 1997 | Pennzoil Exploration & Prod. Co. | Terry | Mallet Land & Cattle Co. #113 | 8,200 | 44531859 |
| 470880 | Dec 10, 1997 | Dec 10, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Chadwick Gas Unit - McLendon #8 | 9,450 | 36533841 |
| 470880Amendment | Dec 10, 1997 | Dec 10, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Chadwick Gas Unit - McLendon #8 | 9,450 | 36533841 |
| 469859 | Dec 10, 1997 | Dec 10, 1997 | Pennzoil Exploration & Prod. Co. | Terry | Mallet Land & Cattle Co. #112 | 8,200 | 44531857 |
| 470838 | Dec 9, 1997 | Dec 9, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Corrie Steele Unit #A 9 | 9,900 | 36533840 |
| 470535 | Nov 26, 1997 | Nov 26, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Roberson Unit #5 | 9,900 | 36533828 |
| 470535Amendment | Nov 26, 1997 | Nov 26, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Roberson Unit #5 | 9,900 | 36533828 |
| 470408 | Nov 24, 1997 | Nov 24, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Mangham Unit #13 | 8,500 | 36533825 |
| 468955 | Nov 24, 1997 | Nov 24, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Wallace Unit #5 | 9,900 | 36533792 |
| 470312 | Nov 21, 1997 | Nov 21, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Chadwick Unit #13 | 8,500 | 36533822 |
| 470309 | Nov 21, 1997 | Nov 21, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Whitaker Unit #13 | 8,500 | 36533823 |
| 469823 | Nov 14, 1997 | Nov 14, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Hull a-21 Unit #A 73 | 9,700 | 36533810 |
| 469980 | Nov 13, 1997 | Nov 13, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Hudson-Johnson Unit #13 | 8,500 | 36533815 |
| 469485 | Nov 12, 1997 | Nov 12, 1997 | Pennzoil Exploration & Prod. Co. | Crane | Snodgrass, E. N. #31 | 3,200 | 10305719 |
| 469893 | Nov 10, 1997 | Nov 10, 1997 | Pennzoil Exploration & Prod. Co. | Scurry | Sacroc Unit #2435 | 7,100 | 41533643 |
| 469891 | Nov 10, 1997 | Nov 10, 1997 | Pennzoil Exploration & Prod. Co. | Scurry | Sacroc Unit #2436 | 7,100 | 41533642 |
| 469889 | Nov 10, 1997 | Nov 10, 1997 | Pennzoil Exploration & Prod. Co. | Scurry | Sacroc Unit #2437 | 7,100 | 41533641 |
| 469888 | Nov 10, 1997 | Nov 10, 1997 | Pennzoil Exploration & Prod. Co. | Scurry | Sacroc Unit #2431A | 7,100 | 41533640 |
| 469722 | Nov 5, 1997 | Nov 5, 1997 | Pennzoil Exploration & Prod. Co. | Zapata | Trevino, Albert #E 2 | 13,500 | 50533699 |
| 469232 | Nov 5, 1997 | Nov 5, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Aaron Jeter Unit #3 | 9,900 | 36533800 |
| 469232Amendment | Nov 5, 1997 | Nov 5, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Jeter, Aaron Unit #3 | 9,900 | 36533800 |
| 469365 | Nov 3, 1997 | Nov 3, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Hull Unit A #A 72 | 9,700 | 36533802 |
| 469495 | Oct 30, 1997 | Oct 30, 1997 | Pennzoil Exploration & Prod. Co. | Refugio | Lambert, M. F. #H 26 | 2,000 | 39101307 |
| 469154 | Oct 29, 1997 | Oct 29, 1997 | Pennzoil Exploration & Prod. Co. | Terry | Mallett Land & Cattle Co. #111 | 8,700 | 44531855 |
| 468996 | Oct 28, 1997 | Oct 28, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Capps Gas Unit #7 | 9,450 | 36533794 |
| 469238 | Oct 27, 1997 | Oct 27, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Adams, T. C. #A 1 | 6,748 | 36500589 |
| 468999 | Oct 24, 1997 | Oct 24, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Capps Gas Unit #8 | 9,450 | 36533795 |
| 468997 | Oct 21, 1997 | Oct 21, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Dunlap Unit #8 | 9,500 | 36533793 |
| 468906 | Oct 21, 1997 | Oct 21, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Capps Gas Unit #6 | 9,450 | 36533791 |
| 466365 | Oct 14, 1997 | Oct 14, 1997 | Pennzoil Exploration & Prod. Co. | Terry | Gordon, M. G. #46 | 7,850 | 44531832 |
| 468450 | Oct 10, 1997 | Oct 10, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Chadwick Gas Unit-McLendon #7 | 9,450 | 36533786 |
| 468572 | Oct 8, 1997 | Oct 8, 1997 | Pennzoil Exploration & Prod. Co. | Victoria | Womack, W. #3 | 5,725 | 46933137 |
| 468572Amendment | Oct 8, 1997 | Oct 8, 1997 | Pennzoil Exploration & Prod. Co. | Victoria | Womack, W. #3 | 6,000 | 46933137 |
| 468572Amendment | Oct 8, 1997 | Oct 8, 1997 | Pennzoil Exploration & Prod. Co. | Victoria | Womack, W. #3 | 5,665 | 46933137 |
| 468543 | Oct 8, 1997 | Oct 8, 1997 | Pennzoil Exploration & Prod. Co. | Winkler | Baird, W. E. #1874C | 5,500 | 49532705 |
| 468543Amendment | Oct 8, 1997 | Oct 8, 1997 | Pennzoil Exploration & Prod. Co. | Winkler | Baird, W. E. #1874C | 5,700 | 49532705 |
| 468528 | Oct 7, 1997 | Oct 7, 1997 | Pennzoil Exploration & Prod. Co. | Refugio | Lambert, M. F. #H26 | 3,500 | 39101307 |
| 468225 | Sep 30, 1997 | Sep 30, 1997 | Pennzoil Exploration & Prod. Co. | Zapata | Jennings #67 | 9,700 | 50533687 |
| 468149 | Sep 30, 1997 | Sep 30, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Chadwick Gas Unit - McLendon #6 | 9,450 | 36533780 |
| 467767 | Sep 26, 1997 | Sep 26, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Hull Unit A #A 66 | 9,650 | 36533771 |
| 467767Amendment | Sep 26, 1997 | Sep 26, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Hull Unit A #A 66 | 9,650 | 36533771 |
| 467982 | Sep 25, 1997 | Sep 25, 1997 | Pennzoil Exploration & Prod. Co. | Panola | Aaron Jeter Unit #2 | 9,900 | 36533774 |
| 467949 | Sep 23, 1997 | Sep 23, 1997 | Pennzoil Exploration & Prod. Co. | Zapata | Garza, Lauro #C 2 | 13,452 | 50531745 |
| 466837 | Sep 10, 1997 | Sep 10, 1997 | Pennzoil Exploration & Prod. Co. | Winkler | Keystone Cattle Co. #146 | 9,800 | 49501299 |
| 466656 | Sep 10, 1997 | Sep 10, 1997 | Pennzoil Exploration & Prod. Co. | Crane | McKnight, M. B. #93 | 4,650 | 10310335 |
| 466869 | Sep 2, 1997 | Sep 2, 1997 | Pennzoil Exploration & Prod. Co. | Crane | Henderson, M. F. #9 | 3,544 | 10300090 |
| 465799 | Aug 28, 1997 | Aug 28, 1997 | Pennzoil Exploration & Prod. Co. | Goliad | N. P. U. (Scarborough 3) #35 | 7,500 | 17533009 |
| 465798 | Aug 28, 1997 | Aug 28, 1997 | Pennzoil Exploration & Prod. Co. | Bee | N. P. U. (Ray 97) #36 | 7,500 | 02532837 |