| 476402 | May 19, 1998 | May 19, 1998 | Maguire Oil Company | Sullivan Deep "A" #3 | 12,300 | 04731807 |
| 476029 | May 6, 1998 | May 6, 1998 | Maguire Oil Company | Sullivan "F" #1 | 13,800 | 04731455 |
| 476029Amendment | May 6, 1998 | May 6, 1998 | Maguire Oil Company | Sullivan "F" #1 | 13,800 | 04731455 |
| 476028 | May 6, 1998 | May 6, 1998 | Shell Western E&P Inc. | Santa FE Ranch #13J | 8,100 | 04701337 |
| 474985 | Apr 3, 1998 | Apr 3, 1998 | Maguire Oil Company | Sullivan "V" #1 | 10,000 | 04731768 |
| 474845 | Apr 1, 1998 | Apr 1, 1998 | Exxon Corp. | Kleberg,r.j. Jr.tr. Viboras Pas #41 | 7,200 | 04730053 |
| 474792 | Mar 30, 1998 | Mar 30, 1998 | Costilla Energy, Inc. | Scott & Hopper G.U. 1 #6 | 9,000 | 04731806 |
| 474792Amendment | Mar 30, 1998 | Mar 30, 1998 | Costilla Energy, Inc. | Scott & Hopper G.U. 1 #6 | 9,000 | 04731806 |
| 474792Amendment | Mar 30, 1998 | Mar 30, 1998 | Costilla Energy, Inc. | Scott & Hopper G.U. 1 #6 | 8,807 | 04731806 |
| 474801 | Mar 27, 1998 | Mar 27, 1998 | Shell Western E&P Inc. | Santa FE Ranch #45 D | 8,750 | 04730741 |
| 474754 | Mar 26, 1998 | Mar 26, 1998 | Exxon Corp. | Mariposa Field Gas Unit #S 1 | 7,630 | 04700280 |
| 474397 | Mar 26, 1998 | Mar 26, 1998 | Headington Oil Company | La Rucia Ranch #11 | 14,000 | 04731804 |
| 474612 | Mar 20, 1998 | Mar 20, 1998 | Edge Petroleum Oper. Co., Inc. | Marshall #1 | 6,600 | 04731805 |
| 474574 | Mar 20, 1998 | Mar 20, 1998 | Maguire Oil Company | Chamberlain High #1 | 8,950 | 04731736 |
| 474271 | Mar 18, 1998 | Mar 18, 1998 | Exxon Corp. | Kelsey Unit #M363 | 5,977 | 04701584 |
| 474270 | Mar 18, 1998 | Mar 18, 1998 | Exxon Corp. | Kleberg, R.j.jr.tr Quiteria Past #131 | 11,841 | 04731746 |
| 474377 | Mar 16, 1998 | Mar 16, 1998 | Wynn-Crosby Energy, Inc. | Longoria, Octavio et Al #7 | 11,700 | 04731803 |
| 474048 | Mar 13, 1998 | Mar 13, 1998 | Exxon Corp. | Kleberg, R.j.jr.tr. Quitera Pas. #132 | 11,100 | 04731801 |
| 474050 | Mar 12, 1998 | Mar 12, 1998 | Exxon Corp. | Kleberg, R.J. Tr. Viboras Pas. #143 | 11,100 | 04731800 |
| 474050Amendment | Mar 12, 1998 | Mar 12, 1998 | Exxon Corp. | Kleberg, R.J. Tr. Viboras Pas. #143 | 11,100 | 04731800 |
| 474249 | Mar 11, 1998 | Mar 11, 1998 | Maguire Oil Company | Sullivan Deep "AA" #1 | 9,700 | 04731802 |
| 474249Amendment | Mar 11, 1998 | Mar 11, 1998 | Maguire Oil Company | Sullivan Deep "AA" #1 | 13,600 | 04731802 |
| 474204 | Mar 9, 1998 | Mar 9, 1998 | Shell Western E&P Inc. | Santa FE Ranch #11 | 7,750 | 04701335 |
| 473809 | Mar 6, 1998 | Mar 6, 1998 | Exxon Corp. | McGill Bros. #455 | 6,046 | 04730757 |
| 473809Amendment | Mar 6, 1998 | Mar 6, 1998 | Exxon Corp. | McGill Bros. #455 | 6,046 | 04730757 |
| 474008 | Mar 4, 1998 | Mar 4, 1998 | Shell Western E&P Inc. | Santa FE Ranch #72 | 8,350 | 04730958 |
| 473534 | Feb 25, 1998 | Feb 25, 1998 | Exxon Corp. | Kleberg, R.j.jr.tr Viboras Pas. #79 | 7,660 | 04730693 |
| 473148 | Feb 9, 1998 | Feb 9, 1998 | Exxon Corp. | Sullivan, J. D. "F" #17 | 7,210 | 04730847 |
| 473096 | Feb 9, 1998 | Feb 9, 1998 | Shell Western E&P Inc. | El Coyote "C" #13 | 12,150 | 04731686 |
| 472913 | Feb 6, 1998 | Feb 6, 1998 | Exxon Corp. | Kleberg, R.J. Jr. TR Viboras Pas #135 | 7,175 | 04731522 |
| 472913Amendment | Feb 6, 1998 | Feb 6, 1998 | Exxon Corp. | Kleberg, R.j.jr. TR Viboras Pas. #135 | 7,653 | 04731522 |
| 472590 | Jan 23, 1998 | Jan 23, 1998 | Wynn-Crosby Energy, Inc. | Lisandro Longoria et al Gas Unit #9 | 11,850 | 04731799 |
| 472553 | Jan 23, 1998 | Jan 23, 1998 | Shell Western E&P Inc. | Santa FE Ranch #46 | 7,900 | 04730735 |
| 472553Amendment | Jan 23, 1998 | Jan 23, 1998 | Shell Western E&P Inc. | Santa FE Ranch #46 | 7,900 | 04730735 |
| 472294 | Jan 22, 1998 | Jan 22, 1998 | Exxon Corp. | McGill Bros. #550 | 12,500 | 04731798 |
| 470935 | Jan 16, 1998 | Jan 16, 1998 | Exxon Corp. | Kelsey Unit #M385 | 6,260 | 04701622 |
| 472191 | Jan 14, 1998 | Jan 14, 1998 | Shell Western E&P Inc. | Santa FE Ranch #103 | 15,700 | 04731797 |
| 472191Amendment | Jan 14, 1998 | Jan 14, 1998 | Shell Western E&P Inc. | Santa FE Ranch #103 | 15,700 | 04731797 |
| 471945 | Jan 8, 1998 | Jan 8, 1998 | Suemaur Exploration, Inc. | Rachal/State #1 | 13,000 | 04731796 |
| 471939 | Jan 8, 1998 | Jan 8, 1998 | Shell Western E&P Inc. | El Coyote "C" #16 | 11,000 | 04731795 |
| 471891 | Jan 7, 1998 | Jan 7, 1998 | Shell Western E&P Inc. | Barbara Lips Gas Unit #7 | 11,000 | 04731794 |
| 471826 | Jan 5, 1998 | Jan 5, 1998 | Maguire Oil Company | Perez-Alaniz Deep "A" #1 | 13,200 | 04731793 |
| 471447 | Dec 19, 1997 | Dec 19, 1997 | OXY USA Inc. | Cage Ranch I #6491 | 8,096 | 04731740 |
| 471285 | Dec 16, 1997 | Dec 16, 1997 | Shell Western E&P Inc. | Santa FE Ranch #33D | 7,800 | 04730336 |
| 471180 | Dec 12, 1997 | Dec 12, 1997 | Exxon Corp. | Kleberg, R.j.jr.tr Viboras Pas. #141 | 11,100 | 04731792 |
| 471012 | Dec 9, 1997 | Dec 9, 1997 | Wynn-Crosby Energy, Inc. | Longoria, Lisandro et Al #7 | 11,340 | 04731638 |
| 470505 | Dec 5, 1997 | Dec 5, 1997 | Exxon Corp. | McGill Bros. #409 | 6,120 | 04701668 |
| 470413 | Dec 1, 1997 | Dec 1, 1997 | Manti Operating Company | Scott & Hopper #52 | 9,000 | 04731760 |
| 470379 | Nov 21, 1997 | Nov 21, 1997 | Maguire Oil Company | Sullivan Deep "A" #2 | 12,400 | 04731791 |
| 470379Amendment | Nov 21, 1997 | Nov 21, 1997 | Maguire Oil Company | Sullivan Deep "A" #2 | 12,400 | 04731791 |
| 470225 | Nov 18, 1997 | Nov 18, 1997 | Texaco E & P Inc. | McGill Bros. Nct. 1 #83 | 13,373 | 04731761 |
| 470225Amendment | Nov 18, 1997 | Nov 18, 1997 | Texaco E & P Inc. | McGill Bros. Nct. 1 #83 | 13,373 | 04731761 |
| 470087 | Nov 14, 1997 | Nov 14, 1997 | OXY USA Inc. | Cage Ranch II #7102A | 8,252 | 04731762 |
| 469452 | Nov 5, 1997 | Nov 5, 1997 | Exxon Corp. | Kleberg, R.j.jr.tr.zach Past.st. #22 | 11,115 | 04731753 |
| 469426 | Nov 5, 1997 | Nov 5, 1997 | Cotton, W.L. Gems & Minerals Ltd | Garcia Gas Unit #3 | 8,600 | 04731790 |
| 469313 | Nov 4, 1997 | Nov 4, 1997 | Headington Oil Company | La Rucia Ranch #10 | 12,000 | 04731788 |
| 469453 | Nov 3, 1997 | Nov 3, 1997 | Exxon Corp. | Kleberg, R.j.jr.tr.zach Past.st. #21 | 11,211 | 04731728 |
| 469387 | Oct 29, 1997 | Oct 29, 1997 | Mestena, Inc. | Monte #1 | 3,000 | 04731789 |
| 469108 | Oct 22, 1997 | Oct 22, 1997 | OXY USA Inc. | Cage Ranch 707-3 Oil Unit #7073 | 8,000 | 04731723 |
| 468890 | Oct 16, 1997 | Oct 16, 1997 | Texaco E & P Inc. | McGill Bros. NCT-1 #75 | 7,618 | 04731706 |
| 463979 | Oct 13, 1997 | Oct 13, 1997 | Texas Independent Explor., Inc. | Bruegger, L. M. #1 | 11,000 | 04731773 |
| 468458 | Oct 9, 1997 | Oct 9, 1997 | Manti Operating Company | Scott & Hopper Field Gas Unit #1 #5 | 8,500 | 04731787 |
| 468458Amendment | Oct 9, 1997 | Oct 9, 1997 | Costilla Energy, Inc. | Scott & Hopper Field Gas Unit #1 #5 | 9,000 | 04731787 |
| 468458Amendment | Oct 9, 1997 | Oct 9, 1997 | Costilla Energy, Inc. | Scott & Hopper G.U. 1 #5 | 7,865 | 04731787 |
| 467566 | Sep 19, 1997 | Sep 19, 1997 | Exxon Corp. | Mariposa Field Gas Unit #F 18 | 8,338 | 04731206 |
| 467561 | Sep 19, 1997 | Sep 19, 1997 | Exxon Corp. | Mariposa Field Gas Unit #C 20 | 6,604 | 04731553 |
| 467562 | Sep 18, 1997 | Sep 18, 1997 | Exxon Corp. | Mariposa Field Gas Unit #F 8 | 7,414 | 04730181 |
| 467692 | Sep 17, 1997 | Sep 17, 1997 | Maguire Oil Company | Rupp Deep "C" #1 | 12,500 | 04731786 |
| 467421 | Sep 16, 1997 | Sep 16, 1997 | Exxon Corp. | McGill Bros. #331 | 5,660 | 04701453 |
| 467421Amendment | Sep 16, 1997 | Sep 16, 1997 | Exxon Corp. | McGill Bros. #331 | 6,370 | 04701453 |
| 467134 | Sep 3, 1997 | Sep 3, 1997 | OXY USA Inc. | Cage Ranch II #6472 | 11,500 | 04731785 |
| 467134Amendment | Sep 3, 1997 | Sep 3, 1997 | OXY USA Inc. | Cage Ranch II #6472 | 11,500 | 04731785 |
| 466780 | Aug 26, 1997 | Aug 26, 1997 | Maguire Oil Company | Perez Deep #1 | 12,500 | 04731784 |
| 466645 | Aug 22, 1997 | Aug 22, 1997 | Maguire Oil Company | Sullivan, D. J. #H 1 | 9,890 | 04731509 |
| 466360 | Aug 20, 1997 | Aug 20, 1997 | Exxon Corp. | Kleberg, R.j.jr.tr.zach Past.st. #24 | 11,100 | 04731783 |
| 466360Amendment | Aug 20, 1997 | Aug 20, 1997 | Exxon Corp. | Kleberg, R.j.jr.tr.zach Past.st. #24 | 11,600 | 04731783 |
| 466360Amendment | Aug 20, 1997 | Aug 20, 1997 | Exxon Corp. | Kleberg, R.j.jr.tr.zach Past.st. #24 | 11,600 | 04731783 |
| 463047 | Aug 18, 1997 | Aug 18, 1997 | Manti Operating Company | Amado Trad Gas Unit #1 #2 | 7,000 | 04731769 |
| 466314 | Aug 15, 1997 | Aug 15, 1997 | Exxon Corp. | Kleberg, R.j.jr.tr.zach Past.st. #23 | 12,500 | 04731782 |
| 466314Amendment | Aug 15, 1997 | Aug 15, 1997 | Exxon Corp. | Kleberg, R.j.jr.tr.zach Past.st. #23 | 12,500 | 04731782 |
| 466093 | Aug 11, 1997 | Aug 11, 1997 | Exxon Corp. | McGill Bros. #390 | 5,992 | 04701635 |
| 465443 | Aug 7, 1997 | Aug 7, 1997 | Manti Operating Company | Scott & Hopper #45 | 6,874 | 04731262 |
| 465687 | Aug 5, 1997 | Aug 5, 1997 | Texaco E & P Inc. | McGill Bros. NCT-1 #80 | 9,500 | 04731744 |
| 465181 | Aug 4, 1997 | Aug 4, 1997 | Manti Operating Company | Sullivan, D. J. -B- #105 | 10,500 | 04731776 |
| 465661 | Jul 30, 1997 | Jul 30, 1997 | Texaco E & P Inc. | McGill Bros. NCT-1 #86 | 10,800 | 04731781 |
| 465632 | Jul 30, 1997 | Jul 30, 1997 | OXY USA Inc. | Cage Ranch State Gas Unit 1 #7103 | 9,500 | 04731780 |
| 465632Amendment | Jul 30, 1997 | Jul 30, 1997 | OXY USA Inc. | Cage Ranch State Gas Unit 1 #7103 | 9,500 | 04731780 |
| 465571 | Jul 29, 1997 | Jul 29, 1997 | Mestena, Inc. | Leoncito #18 | 1,600 | 04731779 |
| 465570 | Jul 29, 1997 | Jul 29, 1997 | Mestena, Inc. | Leoncito #17 | 1,300 | 04731778 |
| 465166 | Jul 28, 1997 | Jul 28, 1997 | Cotton, W.L. Gems & Minerals Ltd | Trad/Kalifa #3 | 8,200 | 04731751 |
| 465215 | Jul 23, 1997 | Jul 23, 1997 | Jamex, Inc. | Mangel #1 | 9,800 | 04731777 |
| 465215Amendment | Jul 23, 1997 | Jul 23, 1997 | Jamex, Inc. | Mangel #1 | 10,500 | 04731777 |
| 465215Amendment | Jul 23, 1997 | Jul 23, 1997 | Jamex, Inc. | Mangel #1 | 10,500 | 04731777 |
| 465149 | Jul 22, 1997 | Jul 22, 1997 | Exxon Corp. | Kelsey Unit #M382 | 5,942 | 04701628 |
| 465179 | Jul 21, 1997 | Jul 21, 1997 | Gaither Petroleum Corporation | Mills Bennett Estate Fee #7H | 3,300 | 04700403 |
| 465153 | Jul 21, 1997 | Jul 21, 1997 | Exxon Corp. | McGill Bros. #319 | 5,110 | 04701452 |
| 465153Amendment | Jul 21, 1997 | Jul 21, 1997 | Exxon Corp. | McGill Bros. #319 | 5,614 | 04701452 |
| 465152 | Jul 21, 1997 | Jul 21, 1997 | Exxon Corp. | McGill Bros. #352 | 6,225 | 04701532 |
| 465152Amendment | Jul 21, 1997 | Jul 21, 1997 | Exxon Corp. | McGill Bros. #352 | 6,225 | 04701532 |
| 465151 | Jul 21, 1997 | Jul 21, 1997 | Exxon Corp. | McGill Bros. #357 | 5,696 | 04701565 |