| 664483 | Jul 1, 2008 | Jul 1, 2008 | Txco Resources Inc. | Briscoe Catarina Ranch #1HH | 8,250 | 12733398 |
| 664436 | Jul 1, 2008 | Jul 1, 2008 | CMR Energy, L.P. | Comanche Ranch #1024HH | 9,000 | 12733555 |
| 664387 | Jun 30, 2008 | Jun 30, 2008 | Txco Resources Inc. | Latham-McKnight #127HH | 5,000 | 12733272 |
| 665066 | Jun 26, 2008 | Jun 26, 2008 | Crimson Energy Partners, L.P. | Briscoe #46 | 6,000 | 12733556 |
| 663727 | Jun 25, 2008 | Jun 25, 2008 | Txco Resources Inc. | Pena Creek Unit #173 | 4,000 | 12733545 |
| 663873 | Jun 23, 2008 | Jun 23, 2008 | Blackbrush O & G, Inc. | San Pedro Ranch #1862 | 4,500 | 12733549 |
| 663869 | Jun 23, 2008 | Jun 23, 2008 | Blackbrush O & G, Inc. | San Pedro Ranch #1762 | 4,500 | 12733548 |
| 663826 | Jun 23, 2008 | Jun 23, 2008 | Blackbrush O & G, Inc. | San Pedro Ranch #1735 | 4,500 | 12733546 |
| 663723 | Jun 21, 2008 | Jun 21, 2008 | Txco Resources Inc. | Pena Creek Unit #232 | 4,000 | 12733541 |
| 663720 | Jun 21, 2008 | Jun 21, 2008 | Txco Resources Inc. | Pena Creek Unit #196 | 3,600 | 12733544 |
| 662496 | Jun 17, 2008 | Jun 17, 2008 | Txco Resources Inc. | South Pena Creek Unit #514 | 4,000 | 12733532 |
| 664089 | Jun 16, 2008 | Jun 16, 2008 | Crimson Energy Partners, L.P. | Briscoe #45 | 6,000 | 12733538 |
| 662955 | Jun 16, 2008 | Jun 16, 2008 | Txco Resources Inc. | South Pena Creek Unit #527 | 4,000 | 12733535 |
| 662956 | Jun 13, 2008 | Jun 13, 2008 | Txco Resources Inc. | Pena Creek Unit #197 | 3,600 | 12733534 |
| 662954 | Jun 13, 2008 | Jun 13, 2008 | Txco Resources Inc. | South Pena Creek Unit #521 | 4,000 | 12733537 |
| 662704 | Jun 11, 2008 | Jun 11, 2008 | Blackbrush O & G, Inc. | San Pedro Ranch #1936 | 4,500 | 12733529 |
| 662493 | Jun 10, 2008 | Jun 10, 2008 | Txco Resources Inc. | South Pena Creek Unit #507 | 4,000 | 12733531 |
| 662465 | Jun 7, 2008 | Jun 7, 2008 | CML Exploration, LLC | Flying G #1H | 7,000 | 12733527 |
| 661989 | Jun 4, 2008 | Jun 4, 2008 | Blackbrush O & G, Inc. | San Pedro Ranch #1256 | 4,500 | 12733524 |
| 661883 | Jun 3, 2008 | Jun 3, 2008 | Sage Energy Company | Bray #2 | 3,631 | 12733391 |
| 662979 | Jun 2, 2008 | Jun 2, 2008 | Crimson Energy Partners, L.P. | Briscoe #44 | 6,000 | 12733526 |
| 661602 | May 30, 2008 | May 30, 2008 | CMR Energy, L.P. | Comanche Ranch #1045HH | 9,000 | 12733288 |
| 661638 | May 29, 2008 | May 29, 2008 | Blackbrush O & G, Inc. | San Pedro Ranch #1156 | 4,500 | 12733523 |
| 661031 | May 21, 2008 | May 21, 2008 | Blackbrush O & G, Inc. | San Pedro Ranch #2236 | 4,500 | 12733522 |
| 661023 | May 20, 2008 | May 20, 2008 | Blackbrush O & G, Inc. | San Pedro Ranch #2136 | 4,500 | 12733521 |
| 660049 | May 19, 2008 | May 19, 2008 | Express Oil Co. | Castellaw-Hundley #1H | 5,900 | 12733518 |
| 660049Amendment | May 19, 2008 | May 19, 2008 | Express Oil Co. | Castellaw-Hundley #1HH | 5,900 | 12733518 |
| 660534 | May 14, 2008 | May 14, 2008 | Txco Resources Inc. | Myers #2683HH | 9,500 | 12733520 |
| 660534Amendment | May 14, 2008 | May 14, 2008 | Txco Resources Inc. | Myers #2683HH | 10,000 | 12733520 |
| 661066 | May 2, 2008 | May 2, 2008 | Crimson Energy Partners, L.P. | Briscoe #43 | 7,000 | 12733519 |
| 659781 | Apr 18, 2008 | Apr 18, 2008 | Crimson Energy Partners, L.P. | Briscoe #42 | 7,000 | 12733516 |
| 658893 | Apr 18, 2008 | Apr 18, 2008 | Express Oil Co. | Reyes #1H | 5,999 | 12733256 |
| 658893Amendment | Apr 18, 2008 | Apr 18, 2008 | Express Oil Co. | Reyes #1HH | 5,999 | 12733256 |
| 655296 | Apr 11, 2008 | Apr 11, 2008 | Carrizo Exploration, Inc. | Votaw #1A | 4,000 | 12733515 |
| 659351 | Apr 10, 2008 | Apr 10, 2008 | Crimson Energy Partners, L.P. | Briscoe #41 | 7,000 | 12733514 |
| 658181 | Apr 10, 2008 | Apr 10, 2008 | Blackbrush O & G, Inc. | San Pedro Ranch #711 | 4,500 | 12733512 |
| 658181Amendment | Apr 10, 2008 | Apr 10, 2008 | Blackbrush O & G, Inc. | San Pedro Ranch #711 | 4,500 | 12733512 |
| 657977 | Apr 7, 2008 | Apr 7, 2008 | Blackbrush O & G, Inc. | San Pedro Ranch #611 | 4,500 | 12733511 |
| 657977Amendment | Apr 7, 2008 | Apr 7, 2008 | Blackbrush O & G, Inc. | San Pedro Ranch #611 | 4,500 | 12733511 |
| 658786 | Apr 3, 2008 | Apr 3, 2008 | Crimson Energy Partners, L.P. | Briscoe Stumberg #6 | 7,000 | 12733513 |
| 658786Amendment | Apr 3, 2008 | Apr 3, 2008 | Crimson Energy Partners, L.P. | Briscoe Stumberg #6 | 7,000 | 12733513 |
| 657588 | Mar 28, 2008 | Mar 28, 2008 | Blackbrush O & G, Inc. | San Pedro Ranch #860 | 4,500 | 12733508 |
| 658267 | Mar 27, 2008 | Mar 27, 2008 | Crimson Energy Partners, L.P. | Briscoe #40 | 6,000 | 12733509 |
| 657372 | Mar 26, 2008 | Mar 26, 2008 | Sage Energy Company | Brundage-Ivy Unit #1HH | 6,500 | 12733507 |
| 657372Amendment | Mar 26, 2008 | Mar 26, 2008 | Sage Energy Company | Brundage-Ivy Unit #1HH | 6,536 | 12733507 |
| 657144 | Mar 24, 2008 | Mar 24, 2008 | Blackbrush O & G, Inc. | San Pedro Ranch #1861 | 4,500 | 12733505 |
| 657144Amendment | Mar 24, 2008 | Mar 24, 2008 | Blackbrush O & G, Inc. | San Pedro Ranch #1861 | 4,500 | 12733505 |
| 656931 | Mar 20, 2008 | Mar 20, 2008 | Blackbrush O & G, Inc. | San Pedro Ranch #1761 | 4,500 | 12733504 |
| 657726 | Mar 19, 2008 | Mar 19, 2008 | Crimson Energy Partners, L.P. | Briscoe #39 | 6,000 | 12733506 |
| 656649 | Mar 5, 2008 | Mar 5, 2008 | Crimson Energy Partners, L.P. | Briscoe Stumberg #5 | 7,000 | 12733503 |
| 655251 | Feb 22, 2008 | Feb 22, 2008 | Swift Energy Operating, LLC | Briscoe #44 | 5,800 | 12733502 |
| 654978 | Feb 20, 2008 | Feb 20, 2008 | Sage Energy Company | Allee-Bowman Unit #1HH | 6,500 | 12733501 |
| 654978Amendment | Feb 20, 2008 | Feb 20, 2008 | Sage Energy Company | Allee-Bowman Unit #1HH | 6,346 | 12733501 |
| 654835 | Feb 15, 2008 | Feb 15, 2008 | Swift Energy Operating, LLC | Briscoe, Dolph "B" #49 | 9,000 | 12733500 |
| 654834 | Feb 14, 2008 | Feb 14, 2008 | Swift Energy Operating, LLC | Dolph Briscoe "A" #54 | 9,000 | 12733499 |
| 651782Amendment | Feb 1, 2008 | Feb 1, 2008 | Texas American Resources Company | Kinnard, Olga #1H | 6,800 | 12733002 |
| 651830 | Dec 31, 2007 | Dec 31, 2007 | Swift Energy Operating, LLC | Briscoe #43 | 9,000 | 12733498 |
| 651782 | Dec 31, 2007 | Dec 31, 2007 | Texas American Resources Company | Kinnard, Olga #1 | 5,300 | 12733002 |
| 651227 | Dec 12, 2007 | Dec 12, 2007 | Crimson Energy Partners, L.P. | Beinhorn #3 | 8,000 | 12733497 |
| 650615 | Dec 11, 2007 | Dec 11, 2007 | Terra Ferma Operating LLC | Star Hamilton E #4801HH | 5,000 | 12733496 |
| 650615Amendment | Dec 11, 2007 | Dec 11, 2007 | Terra Ferma Operating LLC | Star Hamilton E #4801HH | 5,100 | 12733496 |
| 650441 | Dec 7, 2007 | Dec 7, 2007 | Botasch Operating, LLC | McLean-Bowman "B" #6 | 5,906 | 12730171 |
| 650291 | Dec 4, 2007 | Dec 4, 2007 | Crimson Energy Partners, L.P. | Briscoe #38 | 6,000 | 12733495 |
| 650209 | Nov 27, 2007 | Nov 27, 2007 | Crimson Energy Partners, L.P. | Briscoe #37 | 6,000 | 12733493 |
| 649298 | Nov 27, 2007 | Nov 27, 2007 | Terra Ferma Operating LLC | Star Hamilton #1801HH | 5,000 | 12733494 |
| 649731 | Nov 26, 2007 | Nov 26, 2007 | Cactus Lease Service, Ltd. | Cactus #1 | 4,900 | 12733492 |
| 645553 | Nov 20, 2007 | Nov 20, 2007 | Prime Operating Company | San Pedro Ranch #657 | 4,000 | 12732928 |
| 649296 | Nov 19, 2007 | Nov 19, 2007 | Terra Ferma Operating LLC | Star Hamilton #901HH | 5,000 | 12733490 |
| 649708 | Nov 15, 2007 | Nov 15, 2007 | Crimson Energy Partners, L.P. | Briscoe #36 | 6,000 | 12733491 |
| 648979 | Nov 9, 2007 | Nov 9, 2007 | Swift Energy Operating, LLC | Briscoe, Dolph "B" #112 | 9,000 | 12733488 |
| 648972 | Nov 9, 2007 | Nov 9, 2007 | Swift Energy Operating, LLC | Briscoe, Dolph "B" #110 | 9,000 | 12733487 |
| 648970 | Nov 9, 2007 | Nov 9, 2007 | Swift Energy Operating, LLC | Briscoe, Dolph "B" #105 | 9,000 | 12733486 |
| 649019 | Nov 8, 2007 | Nov 8, 2007 | Crimson Energy Partners, L.P. | Briscoe #35 | 6,000 | 12733489 |
| 645497 | Oct 25, 2007 | Oct 25, 2007 | Txco Resources Inc. | Latham-McKnight #127HH | 5,500 | 12733272 |
| 645497Amendment | Oct 25, 2007 | Oct 25, 2007 | Txco Resources Inc. | Latham-McKnight #127HH | 5,500 | 12733272 |
| 647908 | Oct 19, 2007 | Oct 19, 2007 | Txco Resources Inc. | Keller #1633 | 3,800 | 12733485 |
| 646390 | Oct 18, 2007 | Oct 18, 2007 | Escondido Resources GP, LLC | Briscoe #4 | 6,000 | 12733289 |
| 646378 | Oct 18, 2007 | Oct 18, 2007 | Escondido Resources GP, LLC | Briscoe #7 | 6,000 | 12733296 |
| 646367 | Oct 18, 2007 | Oct 18, 2007 | Escondido Resources GP, LLC | Briscoe #5 | 6,000 | 12733294 |
| 646362 | Oct 18, 2007 | Oct 18, 2007 | Escondido Resources GP, LLC | Briscoe #3 | 6,000 | 12733278 |
| 647509 | Oct 16, 2007 | Oct 16, 2007 | Patterson Petroleum LLC | Bowman #3H | 7,000 | 12733484 |
| 646432 | Oct 16, 2007 | Oct 16, 2007 | Terra Ferma Operating LLC | Star Hamilton #401 | 8,000 | 12733483 |
| 646432Amendment | Oct 16, 2007 | Oct 16, 2007 | Terra Ferma Operating LLC | Star Hamilton B #401 | 9,000 | 12733483 |
| 646430 | Sep 26, 2007 | Sep 26, 2007 | Terra Ferma Operating LLC | Star Hamilton #601H | 8,000 | 12733482 |
| 645946 | Sep 14, 2007 | Sep 14, 2007 | L & J Exploration, LLC | Bowman #R107 | 4,000 | 12733481 |
| 645342 | Aug 30, 2007 | Aug 30, 2007 | Crimson Energy Partners, L.P. | Briscoe #34 | 6,000 | 12733480 |
| 644471 | Aug 15, 2007 | Aug 15, 2007 | Crimson Energy Partners, L.P. | Briscoe #33 | 6,000 | 12733479 |
| 644268 | Aug 15, 2007 | Aug 15, 2007 | Sage Energy Company | Speer Unit #1520REH | 6,000 | 12733268 |
| 644268Amendment | Aug 15, 2007 | Aug 15, 2007 | Sage Energy Company | Speer Unit #1520REH | 5,487 | 12733268 |
| 643872 | Aug 10, 2007 | Aug 10, 2007 | Anadarko E&P Company LP | Briscoe Catarina Ranch #1 | 11,840 | 12733398 |
| 641863 | Aug 10, 2007 | Aug 10, 2007 | Crimson Energy Partners, L.P. | Briscoe #5 | 6,000 | 12733334 |
| 643544 | Aug 7, 2007 | Aug 7, 2007 | Texas American Resources Company | Kinnard, Olga #2H | 6,500 | 12733063 |
| 642989 | Aug 7, 2007 | Aug 7, 2007 | Patterson Petroleum LP | Prestage #1H | 7,000 | 12733478 |
| 642989Amendment | Aug 7, 2007 | Aug 7, 2007 | Patterson Petroleum LLC | Prestage #1H | 7,000 | 12733478 |
| 642648 | Jul 27, 2007 | Jul 27, 2007 | Express Oil Co. | Thalman #1 | 9,000 | 12733475 |
| 643104 | Jul 24, 2007 | Jul 24, 2007 | Crimson Energy Partners, L.P. | Briscoe #32 | 6,000 | 12733476 |
| 642301 | Jul 21, 2007 | Jul 21, 2007 | Anadarko E&P Company LP | San Pedro Ranch #1 | 9,000 | 12733411 |
| 642145 | Jul 17, 2007 | Jul 17, 2007 | Crimson Energy Partners, L.P. | Briscoe #31 | 6,000 | 12733474 |
| 642037 | Jul 10, 2007 | Jul 10, 2007 | Crimson Energy Partners, L.P. | Briscoe #30 | 6,000 | 12733473 |
| 641539 | Jul 10, 2007 | Jul 10, 2007 | Crimson Energy Partners, L.P. | Briscoe #29 | 6,000 | 12733472 |