| 613686 | Feb 14, 2006 | Feb 14, 2006 | Escondido Resources GP, LLC | Briscoe #21 | 5,800 | 12733316 |
| 613333 | Feb 6, 2006 | Feb 6, 2006 | Encana Oil & Gas(usa) Inc. | Kothman #1674HH | 7,900 | 12733314 |
| 613333Amendment | Feb 6, 2006 | Feb 6, 2006 | Encana Oil & Gas(usa) Inc. | Kothman #1674HH | 7,900 | 12733314 |
| 613333Amendment | Feb 6, 2006 | Feb 6, 2006 | Encana Oil & Gas(usa) Inc. | Kothman #1674HH | 7,900 | 12733314 |
| 612877 | Jan 30, 2006 | Jan 30, 2006 | Carrizo Exploration, Inc. | Soldiers Lake W #1 | 3,950 | 12733313 |
| 612877Amendment | Jan 30, 2006 | Jan 30, 2006 | Carrizo Exploration, Inc. | Soldiers Lake W #1 | 3,950 | 12733313 |
| 612557 | Jan 23, 2006 | Jan 23, 2006 | Sage Energy Company | Pearsall-Brundage Unit #1REH | 6,800 | 12732905 |
| 612557Amendment | Jan 23, 2006 | Jan 23, 2006 | Sage Energy Company | Pearsall-Brundage Unit #1REH | 6,800 | 12732905 |
| 612748 | Jan 20, 2006 | Jan 20, 2006 | Emerald Operating Company, Inc. | Standifer-Stone Unit #2H | 7,200 | 12732896 |
| 611753 | Jan 17, 2006 | Jan 17, 2006 | Cuatro Petro Corp. | Drought, Ann G. #10 | 3,489 | 12730751 |
| 612058 | Jan 12, 2006 | Jan 12, 2006 | Escondido Resources GP, LLC | Briscoe #19 | 5,800 | 12733311 |
| 612056 | Jan 12, 2006 | Jan 12, 2006 | Escondido Resources GP, LLC | Briscoe #20 | 5,800 | 12733310 |
| 612258 | Jan 11, 2006 | Jan 11, 2006 | Crimson Energy Partners, L.P. | Briscoe #2 | 6,000 | 12733312 |
| 612070 | Jan 9, 2006 | Jan 9, 2006 | Crimson Energy Partners, L.P. | Briscoe #1 | 6,000 | 12733309 |
| 611456 | Dec 22, 2005 | Dec 22, 2005 | Crimson Energy Partners, L.P. | Elm Lake #1 | 4,000 | 12733308 |
| 610956 | Dec 13, 2005 | Dec 13, 2005 | Escondido Resources GP, LLC | Briscoe #16 | 6,000 | 12733307 |
| 610956Amendment | Dec 13, 2005 | Dec 13, 2005 | Escondido Resources GP, LLC | Briscoe #16 | 5,800 | 12733307 |
| 610954 | Dec 13, 2005 | Dec 13, 2005 | Escondido Resources GP, LLC | Briscoe #15 | 6,000 | 12733306 |
| 610954Amendment | Dec 13, 2005 | Dec 13, 2005 | Escondido Resources GP, LLC | Briscoe #15 | 5,800 | 12733306 |
| 610943 | Dec 13, 2005 | Dec 13, 2005 | Escondido Resources GP, LLC | Briscoe #14 | 6,000 | 12733305 |
| 610943Amendment | Dec 13, 2005 | Dec 13, 2005 | Escondido Resources GP, LLC | Briscoe #14 | 6,000 | 12733305 |
| 610536 | Dec 6, 2005 | Dec 6, 2005 | Sage Energy Company | Huffman Unit #1REH | 6,600 | 12732975 |
| 610536Amendment | Dec 6, 2005 | Dec 6, 2005 | Sage Energy Company | Huffman Unit #1REH | 6,600 | 12732975 |
| 610124 | Nov 28, 2005 | Nov 28, 2005 | Escondido Resources GP, LLC | Briscoe #13 | 7,000 | 12733304 |
| 610120Amendment | Nov 28, 2005 | Nov 28, 2005 | Escondido Resources GP, LLC | Briscoe #12 | 7,000 | 12733347 |
| 609718 | Nov 17, 2005 | Nov 17, 2005 | Escondido Resources GP, LLC | Briscoe #11 | 5,800 | 12733303 |
| 609496 | Nov 16, 2005 | Nov 16, 2005 | Hawthorn Energy Partners, LLC | Dimmit Woods #1AH | 7,200 | 12733021 |
| 609496Amendment | Nov 16, 2005 | Nov 16, 2005 | Hawthorn Energy Partners, LLC | Dimmit Woods #1AH | 7,200 | 12733021 |
| 609480 | Nov 16, 2005 | Nov 16, 2005 | Sage Energy Company | Bowles-Nance Unit #1REH | 6,700 | 12733048 |
| 609480Amendment | Nov 16, 2005 | Nov 16, 2005 | Sage Energy Company | Bowles-Nance Unit #1REH | 6,700 | 12733048 |
| 609121 | Nov 9, 2005 | Nov 9, 2005 | Escondido Resources GP, LLC | Briscoe #9 | 6,000 | 12733301 |
| 609121Amendment | Nov 9, 2005 | Nov 9, 2005 | Escondido Resources GP, LLC | Briscoe #9 | 6,000 | 12733301 |
| 609080 | Nov 8, 2005 | Nov 8, 2005 | Escondido Resources GP, LLC | Briscoe #10 | 6,000 | 12733300 |
| 609051 | Nov 8, 2005 | Nov 8, 2005 | Escondido Resources GP, LLC | Briscoe #8 | 6,000 | 12733299 |
| 608863 | Nov 2, 2005 | Nov 2, 2005 | Carrizo Exploration, Inc. | Hitchcock -a- Unit #3 | 3,950 | 12733298 |
| 608768 | Nov 2, 2005 | Nov 2, 2005 | Encana Oil & Gas(usa) Inc. | Webb, F. J. #1 | 7,200 | 12733297 |
| 608570 | Oct 27, 2005 | Oct 27, 2005 | Escondido Resources GP, LLC | Briscoe #7 | 6,000 | 12733296 |
| 608465 | Oct 25, 2005 | Oct 25, 2005 | Patterson Petroleum LP | Wagner Farms #1H | 6,200 | 12733295 |
| 608465Amendment | Oct 25, 2005 | Oct 25, 2005 | Patterson Petroleum LP | Wagner Farms #1H | 6,500 | 12733295 |
| 607693 | Oct 14, 2005 | Oct 14, 2005 | Escondido Resources GP, LLC | Briscoe #5 | 6,000 | 12733294 |
| 607689 | Oct 13, 2005 | Oct 13, 2005 | Escondido Resources GP, LLC | Briscoe #6 | 6,000 | 12733293 |
| 607689Amendment | Oct 13, 2005 | Oct 13, 2005 | Escondido Resources GP, LLC | Briscoe #6 | 6,000 | 12733293 |
| 607597 | Oct 12, 2005 | Oct 12, 2005 | Patterson Petroleum LP | Cannan #1 | 5,600 | 12733292 |
| 607597Amendment | Oct 12, 2005 | Oct 12, 2005 | Patterson Petroleum LP | Cannan #1H | 5,600 | 12733292 |
| 607597Amendment | Oct 12, 2005 | Oct 12, 2005 | Patterson Petroleum LP | Cannan #1H | 6,400 | 12733292 |
| 607465 | Oct 6, 2005 | Oct 6, 2005 | Crimson Energy Partners, L.P. | E.B. Jones (RE) #1317HH | 7,000 | 12732895 |
| 607465Amendment | Oct 6, 2005 | Oct 6, 2005 | Crimson Energy Partners, L.P. | Jones, E. B. (RE) #1317HH | 8,000 | 12732895 |
| 606960 | Sep 27, 2005 | Sep 27, 2005 | Texas American Resources Company | Price Robert -A- #2H | 6,669 | 12733045 |
| 606960Amendment | Sep 27, 2005 | Sep 27, 2005 | Texas American Resources Company | Robert Price -a-2 Unit #2H | 6,863 | 12733045 |
| 606935 | Sep 27, 2005 | Sep 27, 2005 | Sage Energy Company | Tortuga -a- Unit #4REH | 6,700 | 12733004 |
| 606935Amendment | Sep 27, 2005 | Sep 27, 2005 | Sage Energy Company | Tortuga -a- Unit #4REH | 6,700 | 12733004 |
| 606609 | Sep 20, 2005 | Sep 20, 2005 | Carrizo Exploration, Inc. | Hitchcock -A- #2 | 3,950 | 12733291 |
| 606015 | Sep 8, 2005 | Sep 8, 2005 | Crimson Energy Partners, L.P. | J.B. Baggett-Jones (RE) #1025HH | 7,000 | 12732960 |
| 605533 | Aug 26, 2005 | Aug 26, 2005 | Exploration Company, The | Latham-McKnight #114 | 7,500 | 12733290 |
| 605411 | Aug 25, 2005 | Aug 25, 2005 | Sage Energy Company | Tortuga Unit #1REH | 6,800 | 12732843 |
| 605411Amendment | Aug 25, 2005 | Aug 25, 2005 | Sage Energy Company | Tortuga Unit #1REH | 6,587 | 12732843 |
| 605362 | Aug 24, 2005 | Aug 24, 2005 | Escondido Resources GP, LLC | Briscoe #4 | 6,000 | 12733289 |
| 605273 | Aug 22, 2005 | Aug 22, 2005 | CMR Energy, L.P. | Comanche Ranch #1045 | 9,000 | 12733288 |
| 605273Amendment | Aug 22, 2005 | Aug 22, 2005 | CMR Energy, L.P. | Comanche Ranch #1045HH | 9,000 | 12733288 |
| 605104 | Aug 17, 2005 | Aug 17, 2005 | CMR Energy, L.P. | Covert #108 | 4,000 | 12733287 |
| 604135 | Jul 29, 2005 | Jul 29, 2005 | Crimson Energy Partners, L.P. | Huck-Harrington-Jones (RE) #7013HH | 7,000 | 12732998 |
| 604135Amendment | Jul 29, 2005 | Jul 29, 2005 | Crimson Energy Partners, L.P. | Huck-Harrington-Jones (RE) #7013HH | 12,000 | 12732998 |
| 603624 | Jul 20, 2005 | Jul 20, 2005 | Hamilton, J. R. | Kothman-Barnard #2 | 2,500 | 12730358 |
| 603179 | Jul 8, 2005 | Jul 8, 2005 | Exploration Company, The | Shook #14HH | 5,000 | 12733286 |
| 603179Amendment | Jul 8, 2005 | Jul 8, 2005 | Encana Oil & Gas(usa) Inc. | Shook #14HH | 5,400 | 12733286 |
| 602889 | Jul 1, 2005 | Jul 1, 2005 | Exploration Company, The | South Pena Creek Unit #474 | 3,300 | 12733285 |
| 602392 | Jun 23, 2005 | Jun 23, 2005 | Carrizo Exploration, Inc. | Hitchcock #1 | 3,850 | 12733284 |
| 602392Amendment | Jun 23, 2005 | Jun 23, 2005 | Carrizo Exploration, Inc. | Hitchcock #1 | 3,850 | 12733284 |
| 602212 | Jun 17, 2005 | Jun 17, 2005 | Exploration Company, The | Pena Creek Unit #217 | 3,600 | 12733283 |
| 601887 | Jun 10, 2005 | Jun 10, 2005 | Botasch Operating, LLC | Briscoe 'B' #4152 | 6,100 | 12732030 |
| 601741 | Jun 7, 2005 | Jun 7, 2005 | JB Oil & Gas Well Service | Codigo Naranja #1 | 7,000 | 12733282 |
| 601317 | May 27, 2005 | May 27, 2005 | Exploration Company, The | Trotter #116HH | 6,100 | 12733281 |
| 601129 | May 24, 2005 | May 24, 2005 | Exploration Company, The | Pena Creek Unit #159 | 3,600 | 12733280 |
| 601110 | May 24, 2005 | May 24, 2005 | Exploration Company, The | Pena Creek Unit #96 | 3,600 | 12733279 |
| 600738 | May 18, 2005 | May 18, 2005 | Escondido Resources GP, LLC | Briscoe #3 | 6,000 | 12733278 |
| 600613 | May 13, 2005 | May 13, 2005 | Exploration Company, The | Pena Creek Unit #135 | 3,600 | 12733276 |
| 561191 | May 13, 2005 | May 13, 2005 | Exploration Company, The | Trotter-Harvey #1522 HH | 7,000 | 12733277 |
| 600494 | May 10, 2005 | May 10, 2005 | Escondido Resources GP, LLC | Briscoe #2 | 7,000 | 12733275 |
| 600494Amendment | May 10, 2005 | May 10, 2005 | Escondido Resources GP, LLC | Briscoe #2 | 7,000 | 12733275 |
| 600193 | May 4, 2005 | May 4, 2005 | Exploration Company, The | Pena Creek Unit #132 | 3,600 | 12733274 |
| 600011 | May 2, 2005 | May 2, 2005 | Sage Energy Company | Price, Robert #1REH | 6,700 | 12732910 |
| 600011Amendment | May 2, 2005 | May 2, 2005 | Sage Energy Company | Price, Robert #1REH | 6,800 | 12732910 |
| 561191Amendment | Apr 27, 2005 | Apr 27, 2005 | Encana Oil & Gas(usa) Inc. | Trotter-Harvey #1522 HH | 7,000 | 12733277 |
| 560312 | Apr 13, 2005 | Apr 13, 2005 | Escondido Resources GP, LLC | Briscoe #1 | 6,000 | 12733273 |
| 560312Amendment | Apr 13, 2005 | Apr 13, 2005 | Escondido Resources GP, LLC | Briscoe #1 | 6,000 | 12733273 |
| 559824 | Apr 5, 2005 | Apr 5, 2005 | Exploration Company, The | Latham-McKnight #127HH | 6,900 | 12733272 |
| 559824Amendment | Apr 5, 2005 | Apr 5, 2005 | Txco Resources Inc. | Latham-McKnight #127HH | 7,900 | 12733272 |
| 559684 | Mar 30, 2005 | Mar 30, 2005 | Exploration Company, The | Trotter #14 HH | 7,000 | 12733271 |
| 559131 | Mar 16, 2005 | Mar 16, 2005 | CMR Energy, L.P. | Comanche Ranch #3046 HH | 9,000 | 12733270 |
| 559131Amendment | Mar 16, 2005 | Mar 16, 2005 | CMR Energy, L.P. | Comanche Ranch #5046 | 1,000 | 12733270 |
| 559131Amendment | Mar 16, 2005 | Mar 16, 2005 | CMR Energy, L.P. | Comanche Ranch #5046 | 1,000 | 12733270 |
| 558813 | Mar 11, 2005 | Mar 11, 2005 | Sage Energy Company | Dimmit-Wood Unit #2HH | 6,700 | 12733265 |
| 558813Amendment | Mar 11, 2005 | Mar 11, 2005 | Sage Energy Company | Dimmit-Wood Unit #2HH | 6,500 | 12733265 |
| 558705 | Mar 8, 2005 | Mar 8, 2005 | Rockport Georgetown Holdings,lp | Hamilton Ranch #7 1HH | 6,500 | 12733269 |
| 558705Amendment | Mar 8, 2005 | Mar 8, 2005 | Rockport Georgetown Holdings,lp | Hamilton Ranch #7 1HH | 6,500 | 12733269 |
| 558534 | Mar 8, 2005 | Mar 8, 2005 | Exploration Company, The | Speer #1520 HH | 6,600 | 12733268 |
| 558316 | Feb 28, 2005 | Feb 28, 2005 | CMR Energy, L.P. | Comanche Ranch #1666H | 9,000 | 12733267 |
| 557289 | Feb 8, 2005 | Feb 8, 2005 | Exploration Company, The | Covert #118 HH | 6,000 | 12733264 |
| 557154 | Feb 2, 2005 | Feb 2, 2005 | CMR Energy, L.P. | Comanche Ranch #1046 HH | 9,000 | 12733207 |
| 556863 | Jan 27, 2005 | Jan 27, 2005 | Rockport Georgetown Holdings,lp | Hamilton Ranch #17HH | 6,500 | 12733263 |