| 600250Amendment | May 5, 2005 | May 5, 2005 | Houston Exploration Company, The | Zapata | Ramirez, M. #2 | 10,300 | 50535276 |
| 600250Amendment | May 5, 2005 | May 5, 2005 | Houston Exploration Company, The | Zapata | Ramirez, M. #2 | 10,300 | 50535276 |
| 561184 | May 2, 2005 | May 2, 2005 | Houston Exploration Company, The | Zapata | Dominguez #1 | 13,200 | 50535271 |
| 561109 | Apr 27, 2005 | Apr 27, 2005 | Houston Exploration Company, The | Zapata | Rodriguez Gas Unit #3 | 14,100 | 50533030 |
| 560684 | Apr 25, 2005 | Apr 25, 2005 | Houston Exploration Company, The | Zapata | Haynes #23 | 14,500 | 50534672 |
| 559456 | Apr 19, 2005 | Apr 19, 2005 | Houston Exploration Company, The | Zapata | Cuellar, Maria #16 | 10,200 | 50535244 |
| 560453 | Apr 14, 2005 | Apr 14, 2005 | Houston Exploration Company, The | Webb | Alexander, Charles #55 | 9,500 | 47939084 |
| 559182 | Apr 13, 2005 | Apr 13, 2005 | Houston Exploration Company, The | Zapata | Asche #102 | 13,500 | 50535239 |
| 560207 | Apr 12, 2005 | Apr 12, 2005 | Houston Exploration Company, The | Webb | Ramirez-Malakoff #3 | 8,300 | 47939079 |
| 560208 | Apr 11, 2005 | Apr 11, 2005 | Houston Exploration Company, The | Webb | Alexander, Charles #56 | 9,600 | 47939078 |
| 558979 | Apr 11, 2005 | Apr 11, 2005 | Houston Exploration Company, The | Zapata | Asche #100 | 13,100 | 50535237 |
| 559296 | Mar 23, 2005 | Mar 23, 2005 | Houston Exploration Company, The | Zapata | Benavides, B. R. #7 | 12,900 | 50535240 |
| 559324 | Mar 22, 2005 | Mar 22, 2005 | Houston Exploration Company, The | Zapata | Trevino #25 | 10,000 | 50535242 |
| 557954 | Mar 18, 2005 | Mar 18, 2005 | Houston Exploration Company, The | Zapata | Leonardo #42 | 13,400 | 50535221 |
| 557948 | Mar 18, 2005 | Mar 18, 2005 | Houston Exploration Company, The | Zapata | Asche #99 | 12,900 | 50535222 |
| 559058 | Mar 16, 2005 | Mar 16, 2005 | Houston Exploration Company, The | Zapata | Asche #101 | 13,400 | 50535238 |
| 558773Amendment | Mar 9, 2005 | Mar 9, 2005 | Houston Exploration Company, The | Rusk | Taliaferro Gas Unit 1 #2 | 11,200 | 40133517 |
| 558772Amendment | Mar 9, 2005 | Mar 9, 2005 | Houston Exploration Company, The | Rusk | Rusk County Airport #1 | 11,200 | 40133516 |
| 556912 | Mar 3, 2005 | Mar 3, 2005 | Houston Exploration Company, The | Zapata | Rodriguez Gas Unit #14 | 14,900 | 50535201 |
| 557220 | Mar 1, 2005 | Mar 1, 2005 | Houston Exploration Company, The | Zapata | Asche #95 | 12,800 | 50535207 |
| 558125 | Feb 24, 2005 | Feb 24, 2005 | Houston Exploration Company, The | Zapata | Asche #98 | 10,600 | 50535227 |
| 558055 | Feb 23, 2005 | Feb 23, 2005 | Houston Exploration Company, The | Zapata | Asche #97 | 10,500 | 50535226 |
| 556911 | Feb 23, 2005 | Feb 23, 2005 | Houston Exploration Company, The | Zapata | Flores, L. G. #45 | 14,400 | 50535202 |
| 557946 | Feb 22, 2005 | Feb 22, 2005 | Houston Exploration Company, The | Webb | Hubberd, Wm. "C-1" #76 | 9,000 | 47939030 |
| 556588 | Feb 17, 2005 | Feb 17, 2005 | Houston Exploration Company, The | Zapata | Alfonso #33 | 10,320 | 50535197 |
| 556546 | Feb 16, 2005 | Feb 16, 2005 | Houston Exploration Company, The | Zapata | Alfonso #30 | 10,320 | 50535195 |
| 556545 | Feb 16, 2005 | Feb 16, 2005 | Houston Exploration Company, The | Zapata | Alfonso #32 | 10,320 | 50535196 |
| 557490 | Feb 14, 2005 | Feb 14, 2005 | Houston Exploration Company, The | Zapata | El Refugio "AD" #3 | 13,800 | 50535214 |
| 557221 | Feb 4, 2005 | Feb 4, 2005 | Houston Exploration Company, The | Zapata | Asche #96 | 10,700 | 50535206 |
| 555580 | Jan 27, 2005 | Jan 27, 2005 | Houston Exploration Company, The | Zapata | Asche #94 | 13,700 | 50535180 |
| 555579 | Jan 27, 2005 | Jan 27, 2005 | Houston Exploration Company, The | Zapata | Asche #93 | 13,400 | 50535181 |
| 555395 | Jan 24, 2005 | Jan 24, 2005 | Houston Exploration Company, The | Zapata | Asche #92 | 13,800 | 50535179 |
| 556138 | Jan 13, 2005 | Jan 13, 2005 | Houston Exploration Company, The | Zapata | Alfonso #31 | 10,320 | 50535187 |
| 554260 | Dec 28, 2004 | Dec 28, 2004 | Houston Exploration Company, The | Zapata | Asche #91 | 12,000 | 50535156 |
| 554261 | Dec 27, 2004 | Dec 27, 2004 | Houston Exploration Company, The | Zapata | Haynes #26 | 15,000 | 50535155 |
| 555237 | Dec 22, 2004 | Dec 22, 2004 | Houston Exploration Company, The | Zapata | Leonardo #41 | 13,300 | 50535175 |
| 554871 | Dec 17, 2004 | Dec 17, 2004 | Houston Exploration Company, The | Webb | Ramirez, J. E. "A" #2 | 8,300 | 47938942 |
| 554871Amendment | Dec 17, 2004 | Dec 17, 2004 | Houston Exploration Company, The | Webb | Ramirez, J. E. "A" #2 | 7,900 | 47938942 |
| 554312 | Dec 3, 2004 | Dec 3, 2004 | Houston Exploration Company, The | Zapata | Swantner, G. R. "A" #4 | 10,400 | 50535157 |
| 554189 | Dec 3, 2004 | Dec 3, 2004 | Houston Exploration Company, The | Zapata | Benavides, B. R. #6 | 13,600 | 50535146 |
| 553056 | Nov 30, 2004 | Nov 30, 2004 | Houston Exploration Company, The | Zapata | Asche #90 | 13,300 | 50535127 |
| 553672 | Nov 16, 2004 | Nov 16, 2004 | Houston Exploration Company, The | Zapata | Leonardo #40 | 12,750 | 50535139 |
| 553570 | Nov 16, 2004 | Nov 16, 2004 | Houston Exploration Company, The | Zapata | Haynes #25 | 15,000 | 50535136 |
| 553474 | Nov 10, 2004 | Nov 10, 2004 | Houston Exploration Company, The | Zapata | Cuellar, Maria #15 | 10,500 | 50535130 |
| 553474Amendment | Nov 10, 2004 | Nov 10, 2004 | Houston Exploration Company, The | Zapata | Cuellar, Maria #15 | 10,500 | 50535130 |
| 553262 | Nov 5, 2004 | Nov 5, 2004 | Houston Exploration Company, The | Webb | Alexander, Charles #54 | 9,700 | 47938912 |
| 553007 | Nov 1, 2004 | Nov 1, 2004 | Houston Exploration Company, The | Zapata | Flores, L. G. #44 | 13,600 | 50535126 |
| 553006 | Nov 1, 2004 | Nov 1, 2004 | Houston Exploration Company, The | Webb | McKendrick #6 | 10,100 | 47938908 |
| 552879 | Oct 28, 2004 | Oct 28, 2004 | Houston Exploration Company, The | Zapata | Asche #89 | 13,600 | 50535123 |
| 552199 | Oct 13, 2004 | Oct 13, 2004 | Houston Exploration Company, The | Zapata | Asche #88 | 13,700 | 50535108 |
| 552198 | Oct 13, 2004 | Oct 13, 2004 | Houston Exploration Company, The | Zapata | Asche #87 | 13,700 | 50535107 |
| 551022 | Oct 11, 2004 | Oct 11, 2004 | Houston Exploration Company, The | Zapata | Rodriguez Gas Unit #12 | 14,800 | 50535100 |
| 550614 | Oct 11, 2004 | Oct 11, 2004 | Houston Exploration Company, The | Zapata | Porras Gas Unit #7 | 13,800 | 50535096 |
| 550208 | Sep 23, 2004 | Sep 23, 2004 | Houston Exploration Company, The | Zapata | Alfonso #29 | 10,320 | 50535086 |
| 551214 | Sep 20, 2004 | Sep 20, 2004 | Houston Exploration Company, The | Hidalgo | Guerra, D.V. Trust #2 | 12,700 | 21533257 |
| 551055 | Sep 16, 2004 | Sep 16, 2004 | Houston Exploration Company, The | Webb | Macmahon "D" #5 | 6,860 | 47938857 |
| 551054 | Sep 16, 2004 | Sep 16, 2004 | Houston Exploration Company, The | Zapata | Rodriguez Gas Unit #13 | 14,800 | 50535101 |
| 550531 | Sep 13, 2004 | Sep 13, 2004 | Houston Exploration Company, The | Webb | McKendrick, Cookie #4 | 9,900 | 47938845 |
| 550490 | Sep 3, 2004 | Sep 3, 2004 | Houston Exploration Company, The | Webb | Hubberd #71 | 10,520 | 47938844 |
| 550276 | Aug 31, 2004 | Aug 31, 2004 | Houston Exploration Company, The | Zapata | Zachry, E. B. #2 | 9,700 | 50535088 |
| 548882 | Aug 31, 2004 | Aug 31, 2004 | Houston Exploration Company, The | Zapata | Ramirez, Abel #8 | 9,400 | 50535063 |
| 548884 | Aug 23, 2004 | Aug 23, 2004 | Houston Exploration Company, The | Zapata | Ramirez, Abel #7 | 9,100 | 50535064 |
| 549586 | Aug 19, 2004 | Aug 19, 2004 | Houston Exploration Company, The | Webb | Hubberd #61 | 10,200 | 47938377 |
| 548230 | Aug 18, 2004 | Aug 18, 2004 | Houston Exploration Company, The | Zapata | Alfonso #27 | 10,320 | 50535045 |
| 548229 | Aug 16, 2004 | Aug 16, 2004 | Houston Exploration Company, The | Zapata | Asche #85 | 10,900 | 50535046 |
| 549322 | Aug 10, 2004 | Aug 10, 2004 | Houston Exploration Company, The | Zapata | Leonardo #39 | 13,700 | 50535072 |
| 549320 | Aug 10, 2004 | Aug 10, 2004 | Houston Exploration Company, The | Zapata | Asche #86 | 13,700 | 50535071 |
| 548923 | Aug 2, 2004 | Aug 2, 2004 | Houston Exploration Company, The | Zapata | Flores, M #11 | 10,000 | 50535068 |
| 548923Amendment | Aug 2, 2004 | Aug 2, 2004 | Houston Exploration Company, The | Zapata | Flores, M #11 | 10,000 | 50535068 |
| 548948 | Jul 30, 2004 | Jul 30, 2004 | Houston Exploration Company, The | Zapata | Flores, L G #43 | 12,000 | 50535066 |
| 548927 | Jul 30, 2004 | Jul 30, 2004 | Houston Exploration Company, The | Zapata | RMT #9 | 9,800 | 50535065 |
| 548614 | Jul 22, 2004 | Jul 22, 2004 | Houston Exploration Company, The | Zapata | Ramirez, D. #4 | 10,300 | 50535057 |
| 548434 | Jul 20, 2004 | Jul 20, 2004 | Houston Exploration Company, The | Zapata | Juana #12 | 10,300 | 50535056 |
| 548433 | Jul 20, 2004 | Jul 20, 2004 | Houston Exploration Company, The | Zapata | Benavides, B. R. #5 | 13,500 | 50535055 |
| 548432 | Jul 20, 2004 | Jul 20, 2004 | Houston Exploration Company, The | Zapata | El Refugio #2 | 13,500 | 50535054 |
| 548228 | Jul 20, 2004 | Jul 20, 2004 | Houston Exploration Company, The | Zapata | Alfonso #28 | 10,320 | 50535044 |
| 548398 | Jul 19, 2004 | Jul 19, 2004 | Houston Exploration Company, The | Zapata | RMT #8 | 9,000 | 50535053 |
| 547523 | Jun 29, 2004 | Jun 29, 2004 | Houston Exploration Company, The | Zapata | Juana "A" #13 | 10,700 | 50535039 |
| 547499 | Jun 28, 2004 | Jun 28, 2004 | Houston Exploration Company, The | Zapata | Alfonso #26 | 10,320 | 50535038 |
| 547351 | Jun 24, 2004 | Jun 24, 2004 | Houston Exploration Company, The | Webb | Hubberd Estate "D" #68 | 9,830 | 47938771 |
| 547351Amendment | Jun 24, 2004 | Jun 24, 2004 | Houston Exploration Company, The | Webb | Hubberd Estate "D" #68 | 9,500 | 47938771 |
| 547131 | Jun 18, 2004 | Jun 18, 2004 | Houston Exploration Company, The | Zapata | Asche #84 | 11,500 | 50535030 |
| 547051 | Jun 17, 2004 | Jun 17, 2004 | Houston Exploration Company, The | Zapata | Asche #83 | 11,500 | 50535026 |
| 545843 | Jun 15, 2004 | Jun 15, 2004 | Houston Exploration Company, The | Zapata | Flores, L. G. #42 | 11,800 | 50535002 |
| 545842 | Jun 15, 2004 | Jun 15, 2004 | Houston Exploration Company, The | Zapata | Flores, L. G. #41 | 11,900 | 50535003 |
| 546608 | Jun 8, 2004 | Jun 8, 2004 | Houston Exploration Company, The | Webb | McMahon "C" #4 | 7,000 | 47938751 |
| 546598 | Jun 7, 2004 | Jun 7, 2004 | Houston Exploration Company, The | Zapata | El Refugio #1 | 13,500 | 50535020 |
| 546353 | Jun 3, 2004 | Jun 3, 2004 | Houston Exploration Company, The | Zapata | Benavides, B. R. #4 | 13,500 | 50535015 |
| 545869 | May 20, 2004 | May 20, 2004 | Houston Exploration Company, The | Zapata | Asche #82 | 13,500 | 50535005 |
| 545739 | May 17, 2004 | May 17, 2004 | Houston Exploration Company, The | Webb | Macmahon "B" #3 | 8,000 | 47938730 |
| 545738 | May 17, 2004 | May 17, 2004 | Houston Exploration Company, The | Webb | Macmahon "A" #2 | 7,320 | 47938729 |
| 545737 | May 17, 2004 | May 17, 2004 | Houston Exploration Company, The | Webb | McKendrick, W. H. #29 | 8,020 | 47938728 |
| 545071 | Apr 28, 2004 | Apr 28, 2004 | Houston Exploration Company, The | Zapata | Benavides, B. R. #3 | 13,500 | 50534994 |
| 544835 | Apr 23, 2004 | Apr 23, 2004 | Houston Exploration Company, The | Webb | Hubberd "C3" #69 | 9,430 | 47938702 |
| 544834 | Apr 23, 2004 | Apr 23, 2004 | Houston Exploration Company, The | Webb | Hubberd #70 | 9,800 | 47938703 |
| 543444 | Apr 16, 2004 | Apr 16, 2004 | Houston Exploration Company, The | Zapata | Ramirez, D. #3 | 13,600 | 50534962 |
| 544283 | Apr 9, 2004 | Apr 9, 2004 | Houston Exploration Company, The | Zapata | Swantner, G. R. "A" #3 | 11,200 | 50534979 |
| 544052 | Apr 5, 2004 | Apr 5, 2004 | Houston Exploration Company, The | Zapata | Flores, M. #10 | 14,000 | 50534972 |
| 544051 | Apr 5, 2004 | Apr 5, 2004 | Houston Exploration Company, The | Zapata | Flores, M. #9 | 13,500 | 50534971 |
| 544050 | Apr 5, 2004 | Apr 5, 2004 | Houston Exploration Company, The | Zapata | Flores, M. #8 | 13,500 | 50534970 |