| 544049 | Apr 5, 2004 | Apr 5, 2004 | Houston Exploration Company, The | Zapata | Flores, M. #7 | 13,500 | 50534969 |
| 543369 | Mar 17, 2004 | Mar 17, 2004 | Houston Exploration Company, The | Zapata | Garza, L. "5" #9 | 11,220 | 50534959 |
| 543369Amendment | Mar 17, 2004 | Mar 17, 2004 | Houston Exploration Company, The | Zapata | Garza, L. "5" #9 | 11,220 | 50534959 |
| 543366 | Mar 17, 2004 | Mar 17, 2004 | Houston Exploration Company, The | Zapata | Garza, L. "B" 4 #B 7 | 10,750 | 50534960 |
| 543365 | Mar 17, 2004 | Mar 17, 2004 | Houston Exploration Company, The | Zapata | Garza, L. "4" #7 | 13,830 | 50534961 |
| 543206 | Mar 15, 2004 | Mar 15, 2004 | Houston Exploration Company, The | Zapata | Garza, L. "B" 2 #B 6 | 11,600 | 50534955 |
| 543145 | Mar 12, 2004 | Mar 12, 2004 | Houston Exploration Company, The | Zapata | Ramirez, D. #2 | 13,600 | 50534953 |
| 543035 | Mar 10, 2004 | Mar 10, 2004 | Houston Exploration Company, The | Zapata | Garza, L "B" 1 #B 5 | 12,650 | 50534949 |
| 543034 | Mar 10, 2004 | Mar 10, 2004 | Houston Exploration Company, The | Zapata | Garza, L "2" #8 | 9,680 | 50534948 |
| 542232 | Feb 19, 2004 | Feb 19, 2004 | Houston Exploration Company, The | Zapata | Asche #81 | 10,900 | 50534934 |
| 542006 | Feb 13, 2004 | Feb 13, 2004 | Houston Exploration Company, The | Zapata | Derly #8 | 11,500 | 50534931 |
| 541935 | Feb 11, 2004 | Feb 11, 2004 | Houston Exploration Company, The | Webb | McKendrick, Michele #1 | 9,100 | 47938634 |
| 541906 | Feb 10, 2004 | Feb 10, 2004 | Houston Exploration Company, The | Webb | McKendrick, W. H. #26 | 9,000 | 47938633 |
| 541707 | Feb 5, 2004 | Feb 5, 2004 | Houston Exploration Company, The | Webb | Hubberd #67 | 10,200 | 47938632 |
| 541705 | Feb 5, 2004 | Feb 5, 2004 | Houston Exploration Company, The | Zapata | Asche #80 | 13,200 | 50534929 |
| 541471 | Feb 2, 2004 | Feb 2, 2004 | Houston Exploration Company, The | Zapata | Munoz #11 | 14,700 | 50534922 |
| 541470 | Feb 2, 2004 | Feb 2, 2004 | Houston Exploration Company, The | Zapata | Munoz #10 | 14,700 | 50534921 |
| 541469 | Feb 2, 2004 | Feb 2, 2004 | Houston Exploration Company, The | Zapata | Irene #3 | 14,200 | 50534923 |
| 540621 | Jan 12, 2004 | Jan 12, 2004 | Houston Exploration Company, The | Webb | Macmahon #1 | 7,900 | 47938604 |
| 540621Amendment | Jan 12, 2004 | Jan 12, 2004 | Houston Exploration Company, The | Webb | Macmahon #1ST | 6,850 | 47938604 |
| 540620 | Jan 12, 2004 | Jan 12, 2004 | Houston Exploration Company, The | Webb | Ramirez, J.E. #1 | 8,200 | 47938603 |
| 539914 | Dec 19, 2003 | Dec 19, 2003 | Houston Exploration Company, The | Zapata | Bernardo Gas Unit #14 | 14,500 | 50534892 |
| 539914Amendment | Dec 19, 2003 | Dec 19, 2003 | Houston Exploration Company, The | Zapata | Bernardo Gas Unit #14 | 14,500 | 50534892 |
| 539913 | Dec 19, 2003 | Dec 19, 2003 | Houston Exploration Company, The | Zapata | Juana #11 | 10,200 | 50534891 |
| 539912 | Dec 19, 2003 | Dec 19, 2003 | Houston Exploration Company, The | Zapata | Juana #10 | 10,200 | 50534890 |
| 539910 | Dec 19, 2003 | Dec 19, 2003 | Houston Exploration Company, The | Zapata | Swantner G. R. "A" #2 | 11,000 | 50534893 |
| 539490 | Dec 9, 2003 | Dec 9, 2003 | Houston Exploration Company, The | Gregg | Toler Gas Unit #6 | 12,000 | 18331629 |
| 539489 | Dec 9, 2003 | Dec 9, 2003 | Houston Exploration Company, The | Gregg | Stevens Gas Unit #5 | 12,000 | 18331630 |
| 539288 | Dec 4, 2003 | Dec 4, 2003 | Houston Exploration Company, The | Zapata | Yzaguirre-Leo Gas Unit #13 | 14,500 | 50534881 |
| 539287 | Dec 4, 2003 | Dec 4, 2003 | Houston Exploration Company, The | Webb | Macmahon-Raymond Gas Unit #1 | 8,000 | 47938577 |
| 538937 | Nov 24, 2003 | Nov 24, 2003 | Houston Exploration Company, The | Zapata | Rodriguez Gas Unit #11 | 14,100 | 50534875 |
| 538937Amendment | Nov 24, 2003 | Nov 24, 2003 | Houston Exploration Company, The | Zapata | Rodriguez Gas Unit #11 | 14,100 | 50534875 |
| 538936 | Nov 24, 2003 | Nov 24, 2003 | Houston Exploration Company, The | Zapata | Munoz #8 | 15,300 | 50534872 |
| 538863 | Nov 21, 2003 | Nov 21, 2003 | Houston Exploration Company, The | Webb | McKendrick, W. H. #28 | 9,000 | 47938572 |
| 538824 | Nov 20, 2003 | Nov 20, 2003 | Houston Exploration Company, The | Zapata | Munoz #9 | 15,300 | 50534873 |
| 538569 | Nov 14, 2003 | Nov 14, 2003 | Houston Exploration Company, The | Zapata | Munoz #7 | 12,500 | 50534869 |
| 538471 | Nov 12, 2003 | Nov 12, 2003 | Houston Exploration Company, The | Zapata | Asche #79 | 13,500 | 50534867 |
| 538471Amendment | Nov 12, 2003 | Nov 12, 2003 | Houston Exploration Company, The | Zapata | Asche #79 | 13,500 | 50534867 |
| 538469 | Nov 12, 2003 | Nov 12, 2003 | Houston Exploration Company, The | Zapata | Cuellar, J. V. #8 | 10,756 | 50534866 |
| 538063 | Oct 31, 2003 | Oct 31, 2003 | Houston Exploration Company, The | Zapata | Trevino #23 | 9,525 | 50534862 |
| 538063Amendment | Oct 31, 2003 | Oct 31, 2003 | Houston Exploration Company, The | Zapata | Trevino #23 | 10,200 | 50534862 |
| 538062 | Oct 31, 2003 | Oct 31, 2003 | Houston Exploration Company, The | Zapata | Derly #6 | 11,500 | 50534861 |
| 538046 | Oct 30, 2003 | Oct 30, 2003 | Houston Exploration Company, The | Zapata | Derly #7 | 11,500 | 50534858 |
| 537908 | Oct 27, 2003 | Oct 27, 2003 | Houston Exploration Company, The | Zapata | Munoz #6 | 12,300 | 50534855 |
| 536767 | Oct 22, 2003 | Oct 22, 2003 | Houston Exploration Company, The | Zapata | Asche #78 | 13,000 | 50534839 |
| 537733 | Oct 21, 2003 | Oct 21, 2003 | Houston Exploration Company, The | Zapata | Benavides, B. R. #2 | 13,500 | 50534854 |
| 537472 | Oct 14, 2003 | Oct 14, 2003 | Houston Exploration Company, The | Zapata | Leonardo Gutierrez G. U. 2 #1 | 10,500 | 50534848 |
| 537471 | Oct 14, 2003 | Oct 14, 2003 | Houston Exploration Company, The | Webb | McKendrick, W. H. #25 | 9,000 | 47938537 |
| 537471Amendment | Oct 14, 2003 | Oct 14, 2003 | Houston Exploration Company, The | Webb | McKendrick, W. H. #25 | 9,000 | 47938537 |
| 537190 | Oct 7, 2003 | Oct 7, 2003 | Houston Exploration Company, The | Zapata | Gutierrez, J. M. #16 | 10,700 | 50534847 |
| 537189 | Oct 7, 2003 | Oct 7, 2003 | Houston Exploration Company, The | Zapata | Gutierrez, J. M. #15 | 10,700 | 50534846 |
| 536965 | Sep 30, 2003 | Sep 30, 2003 | Houston Exploration Company, The | Zapata | Juana #9 | 10,200 | 50534842 |
| 536963 | Sep 30, 2003 | Sep 30, 2003 | Houston Exploration Company, The | Zapata | Juana #8 | 10,000 | 50534841 |
| 536843 | Sep 26, 2003 | Sep 26, 2003 | Houston Exploration Company, The | Webb | Alexander, Charles #53 | 9,500 | 47938525 |
| 536843Amendment | Sep 26, 2003 | Sep 26, 2003 | Houston Exploration Company, The | Webb | Alexander, Charles #53 | 9,500 | 47938525 |
| 536842 | Sep 26, 2003 | Sep 26, 2003 | Houston Exploration Company, The | Webb | McKendrick, W. H. #27 | 8,700 | 47938526 |
| 536771 | Sep 25, 2003 | Sep 25, 2003 | Houston Exploration Company, The | Zapata | Rodriguez Gas Unit #10 | 14,800 | 50534838 |
| 536770 | Sep 25, 2003 | Sep 25, 2003 | Houston Exploration Company, The | Zapata | Asche #77 | 13,500 | 50534837 |
| 536770Amendment | Sep 25, 2003 | Sep 25, 2003 | Houston Exploration Company, The | Zapata | Asche #77 | 13,500 | 50534837 |
| 536353 | Sep 12, 2003 | Sep 12, 2003 | Houston Exploration Company, The | Webb | McKendrick, Cookie #5 | 9,500 | 47938514 |
| 536352 | Sep 12, 2003 | Sep 12, 2003 | Houston Exploration Company, The | Webb | Alexander, Charles #52 | 9,300 | 47938515 |
| 536159 | Sep 9, 2003 | Sep 9, 2003 | Houston Exploration Company, The | Zapata | Haynes #24 | 15,000 | 50534829 |
| 536159Amendment | Sep 9, 2003 | Sep 9, 2003 | Houston Exploration Company, The | Zapata | Haynes #24 | 15,000 | 50534829 |
| 535903 | Sep 4, 2003 | Sep 4, 2003 | Houston Exploration Company, The | Zapata | Rodriguez Gas Unit #9 | 14,400 | 50534825 |
| 535903Amendment | Sep 4, 2003 | Sep 4, 2003 | Houston Exploration Company, The | Zapata | Rodriguez Gas Unit #9 | 14,400 | 50534825 |
| 535862 | Aug 29, 2003 | Aug 29, 2003 | Houston Exploration Company, The | Zapata | Leonardo #38 | 13,200 | 50534824 |
| 535862Amendment | Aug 29, 2003 | Aug 29, 2003 | Houston Exploration Company, The | Zapata | Leonardo #38 | 13,200 | 50534824 |
| 535862Amendment | Aug 29, 2003 | Aug 29, 2003 | Houston Exploration Company, The | Zapata | Leonardo #38 | 13,200 | 50534824 |
| 535666 | Aug 22, 2003 | Aug 22, 2003 | Houston Exploration Company, The | Webb | Leyendecker-221 #1 | 9,385 | 47938505 |
| 534336 | Aug 18, 2003 | Aug 18, 2003 | Houston Exploration Company, The | Zapata | Asche #74 | 13,500 | 50534786 |
| 535152 | Aug 11, 2003 | Aug 11, 2003 | Houston Exploration Company, The | Webb | Hubberd #66 | 10,900 | 47938494 |
| 534912 | Aug 4, 2003 | Aug 4, 2003 | Houston Exploration Company, The | Zapata | Asche #76 | 13,300 | 50534798 |
| 534911 | Aug 4, 2003 | Aug 4, 2003 | Houston Exploration Company, The | Zapata | Bustamante G. U. #9 | 14,265 | 50534797 |
| 534686 | Jul 28, 2003 | Jul 28, 2003 | Houston Exploration Company, The | Webb | McKendrick, Cookie #2 | 9,200 | 47938487 |
| 534337 | Jul 21, 2003 | Jul 21, 2003 | Houston Exploration Company, The | Zapata | Munoz #5 | 14,500 | 50534785 |
| 534107 | Jul 14, 2003 | Jul 14, 2003 | Houston Exploration Company, The | Zapata | Asche #75 | 13,500 | 50534778 |
| 533499 | Jun 26, 2003 | Jun 26, 2003 | Houston Exploration Company, The | Zapata | Benavides, B. R. #1 | 13,300 | 50534767 |
| 533507 | Jun 25, 2003 | Jun 25, 2003 | Houston Exploration Company, The | Webb | Hubberd #65 | 10,400 | 47938465 |
| 533410 | Jun 23, 2003 | Jun 23, 2003 | Houston Exploration Company, The | Zapata | D. Ramirez Gas Unit #1 | 10,000 | 50534766 |
| 533160 | Jun 16, 2003 | Jun 16, 2003 | Houston Exploration Company, The | Zapata | Bustamante G. U. #7 | 14,265 | 50534760 |
| 533160Amendment | Jun 16, 2003 | Jun 16, 2003 | Houston Exploration Company, The | Zapata | Bustamante G. U. #7 | 14,265 | 50534760 |
| 533158 | Jun 16, 2003 | Jun 16, 2003 | Houston Exploration Company, The | Webb | Hubberd #64 | 10,600 | 47938452 |
| 533157 | Jun 16, 2003 | Jun 16, 2003 | Houston Exploration Company, The | Zapata | Bustamante G. U. #8 | 14,800 | 50534761 |
| 532974 | Jun 10, 2003 | Jun 10, 2003 | Houston Exploration Company, The | Webb | McKendrick, Cookie #1 | 9,200 | 47938448 |
| 530958 | Jun 3, 2003 | Jun 3, 2003 | Houston Exploration Company, The | Zapata | Ramirez, Abel #6 | 9,000 | 50534721 |
| 532378 | May 27, 2003 | May 27, 2003 | Houston Exploration Company, The | Zapata | Yzaguirre-Leo Gas Unit #12 | 14,800 | 50534746 |
| 531206 | May 14, 2003 | May 14, 2003 | Houston Exploration Company, The | Webb | Hubberd, W. M. "C-1" #63 | 9,500 | 47938408 |
| 531720 | May 12, 2003 | May 12, 2003 | Houston Exploration Company, The | Webb | Martinez-Barrera G.U. #6 | 9,297 | 47938419 |
| 531205 | Apr 29, 2003 | Apr 29, 2003 | Houston Exploration Company, The | Zapata | Ramirez, D. #1 | 10,800 | 50534724 |
| 530796 | Apr 21, 2003 | Apr 21, 2003 | Houston Exploration Company, The | Zapata | Daisy #5 | 11,900 | 50534717 |
| 530772 | Apr 15, 2003 | Apr 15, 2003 | Houston Exploration Company, The | Zapata | Bruni Mineral Trust "D" #3 | 11,500 | 50534715 |
| 530770 | Apr 15, 2003 | Apr 15, 2003 | Houston Exploration Company, The | Jim Hogg | Perez, F. "D" #3 | 15,000 | 24732263 |
| 529720 | Apr 14, 2003 | Apr 14, 2003 | Houston Exploration Company, The | Zapata | Leonardo #37 | 10,500 | 50534694 |
| 530442 | Apr 8, 2003 | Apr 8, 2003 | Houston Exploration Company, The | Webb | Hubberd #62 | 11,700 | 47938389 |
| 530283 | Apr 3, 2003 | Apr 3, 2003 | Houston Exploration Company, The | Webb | Alexander, Charles #51 | 9,500 | 47938384 |
| 530052 | Mar 27, 2003 | Mar 27, 2003 | Houston Exploration Company, The | Webb | Hubberd #61 | 10,200 | 47938377 |
| 528594 | Mar 27, 2003 | Mar 27, 2003 | Houston Exploration Company, The | Zapata | Garza, A. #17 | 10,200 | 50534674 |
| 529725 | Mar 19, 2003 | Mar 19, 2003 | Houston Exploration Company, The | Zapata | Asche #73 | 10,500 | 50534693 |
| 529725Amendment | Mar 19, 2003 | Mar 19, 2003 | Houston Exploration Company, The | Zapata | Asche #73 | 13,300 | 50534693 |
| 529725Amendment | Mar 19, 2003 | Mar 19, 2003 | Houston Exploration Company, The | Zapata | Asche #73 | 13,300 | 50534693 |