| 487841 | Sep 22, 1999 | Sep 22, 1999 | Altura Energy Ltd. | Goldsmith-Landreth (Deep) Unit #311 | 6,600 | 13537774 |
| 487791 | Sep 22, 1999 | Sep 22, 1999 | Altura Energy Ltd. | North Cowden Unit #1502 | 4,800 | 13537772 |
| 487790 | Sep 22, 1999 | Sep 22, 1999 | Altura Energy Ltd. | North Cowden Unit #1501 | 4,800 | 13537770 |
| 487789 | Sep 22, 1999 | Sep 22, 1999 | Altura Energy Ltd. | North Cowden Unit #1500 | 4,800 | 13537771 |
| 487788 | Sep 22, 1999 | Sep 22, 1999 | Altura Energy Ltd. | North Cowden Unit #1499 | 4,800 | 13537769 |
| 487738 | Sep 20, 1999 | Sep 20, 1999 | Anadarko Petroleum Corp. | Cummins, H. E. 'C' #14 | 7,000 | 13537768 |
| 487557 | Sep 14, 1999 | Sep 14, 1999 | OXY USA Inc. | Hawkeye #1 | 10,150 | 13537767 |
| 487480 | Sep 13, 1999 | Sep 13, 1999 | OXY USA Inc. | Cisco Kid #1 | 5,700 | 13537766 |
| 487317 | Sep 13, 1999 | Sep 13, 1999 | Texaco E & P Inc. | McDonald, Ida #14 | 8,931 | 13502315 |
| 481526Amendment | Sep 9, 1999 | Sep 9, 1999 | Texaco E & P Inc. | Holt, O. B. '16' #1 | 9,750 | 13537738 |
| 486404 | Sep 2, 1999 | Sep 2, 1999 | Imperial Gas Resources LLC | Williamson, Jesse #4 | 8,100 | 13508318 |
| 486967 | Aug 27, 1999 | Aug 27, 1999 | Fasken Oil and Ranch, Ltd. | Fee "AH" #1 | 8,200 | 13538264 |
| 486233 | Aug 26, 1999 | Aug 26, 1999 | Altura Energy Ltd. | Jars, Cowden #2 | 10,200 | 13537756 |
| 486770 | Aug 18, 1999 | Aug 18, 1999 | Texaco E & P Inc. | Holt, O. B. #135 | 4,850 | 13537763 |
| 486667 | Aug 16, 1999 | Aug 16, 1999 | OXY USA Inc. | Moss E #1 | 10,830 | 13510049 |
| 486424 | Aug 6, 1999 | Aug 6, 1999 | Titan Resources I, Inc. | North Foster Unit #166 | 4,500 | 13537762 |
| 486424Amendment | Aug 6, 1999 | Aug 6, 1999 | Titan Resources I, Inc. | North Foster Unit #166 | 4,900 | 13537762 |
| 486423 | Aug 6, 1999 | Aug 6, 1999 | Titan Resources I, Inc. | North Foster Unit #167 | 4,500 | 13537761 |
| 486422 | Aug 6, 1999 | Aug 6, 1999 | Titan Resources I, Inc. | North Foster Unit #168 | 4,500 | 13537760 |
| 486421 | Aug 6, 1999 | Aug 6, 1999 | Titan Resources I, Inc. | North Foster Unit #169 | 4,500 | 13537759 |
| 486421Amendment | Aug 6, 1999 | Aug 6, 1999 | Titan Resources I, Inc. | North Foster Unit #169 | 4,900 | 13537759 |
| 486390 | Aug 5, 1999 | Aug 5, 1999 | Titan Resources I, Inc. | North Foster Unit #165 | 4,500 | 13537758 |
| 486389 | Aug 5, 1999 | Aug 5, 1999 | Titan Resources I, Inc. | North Foster Unit #164 | 4,500 | 13537757 |
| 486366 | Aug 3, 1999 | Aug 3, 1999 | Arco Permian | Corigan Cowden Unit #209H | 4,750 | 13537662 |
| 486111 | Jul 26, 1999 | Jul 26, 1999 | Arco Permian | Corrigan Cowden Unit #210 | 4,500 | 13537755 |
| 486110 | Jul 26, 1999 | Jul 26, 1999 | Arco Permian | Corrigan Cowden Unit #108 | 4,500 | 13537754 |
| 486109 | Jul 26, 1999 | Jul 26, 1999 | Arco Permian | Corrigan Cowden Unit #109 | 4,500 | 13537753 |
| 486108 | Jul 26, 1999 | Jul 26, 1999 | Arco Permian | Corrigan Cowden Unit #334 | 4,500 | 13537752 |
| 486054 | Jul 23, 1999 | Jul 23, 1999 | Texaco E & P Inc. | Cowden, J. F. #7 | 8,113 | 13502659 |
| 486842 | Jul 22, 1999 | Jul 22, 1999 | Union Pacific Resources Company | Madison #1 | 12,600 | 13537732 |
| 485997 | Jul 21, 1999 | Jul 21, 1999 | Altura Energy Ltd. | Goodman, Rose #2 | 10,500 | 13537751 |
| 485866 | Jul 15, 1999 | Jul 15, 1999 | Phillips Petroleum Company | Texas Universtiy-R #2 | 8,850 | 00304655 |
| 485020 | Jul 14, 1999 | Jul 14, 1999 | Alto Minerals, Inc. | Holt, O. B. -B- #2 | 5,325 | 13501713 |
| 485769 | Jul 13, 1999 | Jul 13, 1999 | Texaco E & P Inc. | El Sapo '2' #1 | 4,050 | 13537750 |
| 485276 | Jun 24, 1999 | Jun 24, 1999 | Arco Permian | Corrigan Cowden Unit #102 RH | 4,607 | 13536625 |
| 485275 | Jun 24, 1999 | Jun 24, 1999 | Arco Permian | Corrigan Cowden Unit #207H | 4,600 | 13535597 |
| 485274 | Jun 24, 1999 | Jun 24, 1999 | Arco Permian | Corrigan Cowden Unit #307H | 4,590 | 13507833 |
| 485273 | Jun 24, 1999 | Jun 24, 1999 | Arco Permian | Corrigan Cowden Unit #318RH | 4,750 | 13537585 |
| 484935 | Jun 3, 1999 | Jun 3, 1999 | Phillips Petroleum Company | Speck #3 | 4,000 | 13537749 |
| 484837 | Jun 2, 1999 | Jun 2, 1999 | Altura Energy Ltd. | Goodman, Rose #1 | 10,150 | 13537748 |
| 484593 | May 24, 1999 | May 24, 1999 | Satanta Oil Company | Henderson #11 | 4,700 | 13530761 |
| 484626 | May 19, 1999 | May 19, 1999 | Phillips Petroleum Company | Speck #5 | 4,000 | 13537747 |
| 484285 | May 5, 1999 | May 5, 1999 | Eureka Prospecting Company | Ratliff, Sallie W. "32" #1 | 7,000 | 13537746 |
| 484110 | Apr 27, 1999 | Apr 27, 1999 | Texland-Rector & Schumacher | Exxon-Barrow "16" #1 | 8,000 | 13537745 |
| 484040 | Apr 22, 1999 | Apr 22, 1999 | Imperial Gas Resources LLC | Williamson, Jessie A #5 | 8,342 | 13508090 |
| 483659 | Apr 6, 1999 | Apr 6, 1999 | Chevron U. S. A. Inc. | Goldsmith San Andres Unit #435 | 4,355 | 13500816 |
| 483532 | Mar 31, 1999 | Mar 31, 1999 | Enron Oil & Gas Company | Saddle Bronc #1 | 14,000 | 13537744 |
| 483444 | Mar 23, 1999 | Mar 23, 1999 | Marathon Oil Company | TXL "41" #1 | 4,350 | 13537743 |
| 483443 | Mar 23, 1999 | Mar 23, 1999 | Marathon Oil Company | TXL "19" #1 | 4,350 | 13537742 |
| 482877 | Mar 23, 1999 | Mar 23, 1999 | Chevron U. S. A. Inc. | Goldsmith, C. A. et Al #960 | 9,550 | 13501329 |
| 483364 | Mar 22, 1999 | Mar 22, 1999 | Yucca Energy, Inc. | Forest #1 | 4,200 | 13537741 |
| 483321 | Mar 17, 1999 | Mar 17, 1999 | Marathon Oil Company | Rigel #1 | 4,450 | 13536949 |
| 483016 | Mar 17, 1999 | Mar 17, 1999 | Four Star Oil and Gas Company | Headlee, E. V. TG #5 | 13,172 | 13506593 |
| 482952 | Mar 1, 1999 | Mar 1, 1999 | Chevron U. S. A. Inc. | Goldsmith, C. A. et Al #439 | 9,520 | 13500820 |
| 482962 | Feb 26, 1999 | Feb 26, 1999 | Phillips Petroleum Company | Speck #1 | 3,950 | 13537740 |
| 482735 | Feb 16, 1999 | Feb 16, 1999 | Phillips Petroleum Company | Speck #2 | 4,000 | 13508989 |
| 482284 | Feb 8, 1999 | Feb 8, 1999 | Texaco E & P Inc. | Connell, W. E. NCT-2 #169 | 6,150 | 13536744 |
| 481526 | Jan 4, 1999 | Jan 4, 1999 | Texaco E & P Inc. | Holt, O. B. "16" #1 | 9,750 | 13537738 |
| 481636 | Dec 21, 1998 | Dec 21, 1998 | Altura Energy Ltd. | Jars, Cowden #1 | 10,000 | 13537739 |
| 481397 | Dec 10, 1998 | Dec 10, 1998 | Phillips Petroleum Company | Blakeney, B. H. "E" #4 | 3,900 | 13504412 |
| 480571 | Dec 4, 1998 | Dec 4, 1998 | Chevron U. S. A. Inc. | Goldsmith, C. A. et Al #1551 | 6,800 | 13534782 |
| 480998 | Nov 19, 1998 | Nov 19, 1998 | Texaco E & P Inc. | El Sapo "4" #1 | 4,300 | 13537737 |
| 480682 | Nov 6, 1998 | Nov 6, 1998 | Phillips Petroleum Company | South Cowden Unit #623H | 4,900 | 13536941 |
| 479971 | Nov 6, 1998 | Nov 6, 1998 | Altura Energy Ltd. | Foster, H. #27 | 9,400 | 13537734 |
| 480472 | Oct 29, 1998 | Oct 29, 1998 | Lario Oil & Gas Company | Blakeney 'G' #7 | 3,950 | 13537736 |
| 480276 | Oct 21, 1998 | Oct 21, 1998 | Belco Energy Corp. | Kloh #2 | 5,500 | 13537735 |
| 479924 | Oct 6, 1998 | Oct 6, 1998 | Chevron U. S. A. Inc. | Goldsmith San Andres Unit #434 | 4,400 | 13500815 |
| 479506 | Sep 22, 1998 | Sep 22, 1998 | Chevron U. S. A. Inc. | Goldsmith, C. A. et Al #987 | 5,820 | 13521085 |
| 479506Amendment | Sep 22, 1998 | Sep 22, 1998 | Chevron U. S. A. Inc. | Goldsmith, C. A. et Al #987 | 5,820 | 13521085 |
| 479609 | Sep 21, 1998 | Sep 21, 1998 | Rust Oil Corp. | Cowden Ranch "56" #3 | 9,500 | 13537733 |
| 479074 | Sep 2, 1998 | Sep 2, 1998 | Chevron U. S. A. Inc. | Goldsmith, C. A. et Al #593W | 8,080 | 13500971 |
| 478668 | Sep 1, 1998 | Sep 1, 1998 | Phillips Petroleum Company | South Cowden Unit #620H | 4,800 | 13536152 |
| 478668Amendment | Sep 1, 1998 | Sep 1, 1998 | Phillips Petroleum Company | South Cowden Unit #620H | 4,800 | 13536152 |
| 478667 | Sep 1, 1998 | Sep 1, 1998 | Phillips Petroleum Company | South Cowden Unit #107H | 4,900 | 13531393 |
| 478666 | Sep 1, 1998 | Sep 1, 1998 | Phillips Petroleum Company | South Cowden Unit #713H | 4,900 | 13537272 |
| 478961 | Aug 31, 1998 | Aug 31, 1998 | Union Pacific Resources Company | Madison #1 | 13,100 | 13537732 |
| 478938 | Aug 28, 1998 | Aug 28, 1998 | Costilla Energy, Inc. | Edwards "47" J #1 | 9,500 | 13537731 |
| 478890 | Aug 24, 1998 | Aug 24, 1998 | Altura Energy Ltd. | Scharbauer, Clarence "Deep" #2 | 10,000 | 13537730 |
| 478576 | Aug 24, 1998 | Aug 24, 1998 | Anadarko Petroleum Corp. | TXL South Unit #2901 | 7,000 | 13503668 |
| 478575 | Aug 11, 1998 | Aug 11, 1998 | Anadarko Petroleum Corp. | TXL South Unit #2903 | 7,000 | 13503666 |
| 478574 | Aug 11, 1998 | Aug 11, 1998 | Anadarko Petroleum Corp. | TXL South Unit #2902 | 7,000 | 13503667 |
| 478602 | Aug 10, 1998 | Aug 10, 1998 | Anadarko Petroleum Corp. | TXL South Unit #2802 | 7,000 | 13503768 |
| 478489 | Aug 4, 1998 | Aug 4, 1998 | Phillips Petroleum Company | South Cowden Unit #218 D | 10,000 | 13520412 |
| 478097 | Jul 29, 1998 | Jul 29, 1998 | Anadarko Petroleum Corp. | TXL South Unit #2804 | 7,000 | 13503767 |
| 478166 | Jul 27, 1998 | Jul 27, 1998 | Texland-Rector & Schumacher | Exxon-Barrows #1 | 9,400 | 13537729 |
| 477952 | Jul 22, 1998 | Jul 22, 1998 | Anadarko Petroleum Corp. | Goldsmith Cummins Deep Unit #306 | 7,000 | 13537715 |
| 478014 | Jul 21, 1998 | Jul 21, 1998 | Anadarko Petroleum Corp. | Goldsmith Cummins Deep Unit #302 | 7,000 | 13537728 |
| 477965 | Jul 21, 1998 | Jul 21, 1998 | Anadarko Petroleum Corp. | Goldsmith Cummins Deep Unit #288 | 7,000 | 13537727 |
| 477964 | Jul 21, 1998 | Jul 21, 1998 | Anadarko Petroleum Corp. | Goldsmith Cummins Deep Unit #291 | 7,000 | 13537726 |
| 477963 | Jul 21, 1998 | Jul 21, 1998 | Anadarko Petroleum Corp. | Goldsmith Cummins Deep Unit #292 | 7,000 | 13537725 |
| 477961 | Jul 21, 1998 | Jul 21, 1998 | Anadarko Petroleum Corp. | Goldsmith Cummins Deep Unit #293 | 7,000 | 13537724 |
| 477961Amendment | Jul 21, 1998 | Jul 21, 1998 | Anadarko Petroleum Corp. | Goldsmith Cummins Deep Unit #293 | 7,000 | 13537724 |
| 477960 | Jul 21, 1998 | Jul 21, 1998 | Anadarko Petroleum Corp. | Goldsmith Cummins Deep Unit #295 | 7,000 | 13537723 |
| 477959 | Jul 21, 1998 | Jul 21, 1998 | Anadarko Petroleum Corp. | Goldsmith Cummins Deep Unit #297 | 7,000 | 13537722 |
| 477959Amendment | Jul 21, 1998 | Jul 21, 1998 | Anadarko Petroleum Corp. | Goldsmith Cummins Deep Unit #297 | 7,000 | 13537722 |
| 477958 | Jul 21, 1998 | Jul 21, 1998 | Anadarko Petroleum Corp. | Goldsmith Cummins Deep Unit #298 | 7,000 | 13537721 |
| 477957 | Jul 21, 1998 | Jul 21, 1998 | Anadarko Petroleum Corp. | Goldsmith Cummins Deep Unit #299 | 7,000 | 13537720 |
| 477956 | Jul 21, 1998 | Jul 21, 1998 | Anadarko Petroleum Corp. | Goldsmith Cummins Deep Unit #303 | 7,000 | 13537719 |
| 477955 | Jul 21, 1998 | Jul 21, 1998 | Anadarko Petroleum Corp. | Goldsmith Cummins Deep Unit #301 | 7,000 | 13537718 |
| 477954 | Jul 21, 1998 | Jul 21, 1998 | Anadarko Petroleum Corp. | Goldsmith Cummins Deep Unit #300 | 7,000 | 13537717 |