| 627504 | Oct 16, 2006 | Oct 16, 2006 | Anadarko E&P Company LP | Briscoe Cochina Ranch #1 | 13,200 | 12733400 |
| 627471 | Oct 13, 2006 | Oct 13, 2006 | Crimson Energy Partners, L.P. | Briscoe #18 | 6,000 | 12733399 |
| 626876 | Oct 3, 2006 | Oct 3, 2006 | Anadarko E&P Company LP | Briscoe Catarina #1 | 13,500 | 12733398 |
| 626552 | Sep 26, 2006 | Sep 26, 2006 | Crimson Energy Partners, L.P. | Briscoe #17 | 6,000 | 12733397 |
| 625507 | Sep 15, 2006 | Sep 15, 2006 | Prime Operating Company | San Pedro Ranch #121 | 3,504 | 12731749 |
| 625435 | Sep 15, 2006 | Sep 15, 2006 | Texas American Resources Company | Robert Price -a-1 Unit #1H | 6,870 | 12733009 |
| 625846 | Sep 13, 2006 | Sep 13, 2006 | Crimson Energy Partners, L.P. | Briscoe #16 | 6,000 | 12733396 |
| 625784 | Sep 12, 2006 | Sep 12, 2006 | Carrizo Exploration, Inc. | Bowman #G 2 | 4,000 | 12733395 |
| 625783 | Sep 12, 2006 | Sep 12, 2006 | Carrizo Exploration, Inc. | Bowman #G 1 | 4,000 | 12733394 |
| 625721 | Sep 12, 2006 | Sep 12, 2006 | Hawthorn Energy Partners, LLC | Heitz #731HH | 7,000 | 12732976 |
| 625721Amendment | Sep 12, 2006 | Sep 12, 2006 | Hawthorn Energy Partners, LLC | Heitz #731HH | 7,000 | 12732976 |
| 625240 | Aug 30, 2006 | Aug 30, 2006 | Crimson Energy Partners, L.P. | Briscoe #15 | 6,000 | 12733393 |
| 624925 | Aug 29, 2006 | Aug 29, 2006 | TDW Exploration, LLC | Coffield Unit #2 | 4,950 | 12732558 |
| 624834 | Aug 23, 2006 | Aug 23, 2006 | Sage Energy Company | Bray #2SM | 4,000 | 12733391 |
| 624796 | Aug 23, 2006 | Aug 23, 2006 | Crimson Energy Partners, L.P. | Briscoe "B" #2 | 8,000 | 12733390 |
| 624314 | Aug 21, 2006 | Aug 21, 2006 | Carrizo Exploration, Inc. | Nelson, Strauder G. #1 | 3,850 | 12700310 |
| 624446 | Aug 17, 2006 | Aug 17, 2006 | Ampak Oil Company | Wilson #3H | 11,000 | 12732855 |
| 624388 | Aug 15, 2006 | Aug 15, 2006 | Crimson Energy Partners, L.P. | Briscoe #14 | 6,000 | 12733389 |
| 624225 | Aug 11, 2006 | Aug 11, 2006 | Prime Operating Company | San Pedro Ranch 560 #560 | 4,000 | 12732973 |
| 624222 | Aug 11, 2006 | Aug 11, 2006 | Crimson Energy Partners, L.P. | Briscoe "B" #1 | 8,000 | 12733388 |
| 624214 | Aug 11, 2006 | Aug 11, 2006 | Hamilton, J. R. | Hamilton, J. R. #1201 | 3,500 | 12733387 |
| 623842 | Aug 11, 2006 | Aug 11, 2006 | Texas American Resources Company | Big Wells Lo. San Miguel Unit #47 | 5,864 | 12732528 |
| 623842Amendment | Aug 11, 2006 | Aug 11, 2006 | Texas American Resources Company | Big Wells Lo. San Miguel Unit #57 | 5,864 | 12732528 |
| 623442 | Jul 28, 2006 | Jul 28, 2006 | Escondido Resources GP, LLC | Briscoe, Chip "B" #47 | 8,000 | 12733385 |
| 623391 | Jul 28, 2006 | Jul 28, 2006 | Escondido Resources GP, LLC | Briscoe, Dolph "D" #50 | 8,000 | 12733384 |
| 623390 | Jul 28, 2006 | Jul 28, 2006 | Escondido Resources GP, LLC | Briscoe, Dolph "C" #49 | 8,000 | 12733383 |
| 623382 | Jul 28, 2006 | Jul 28, 2006 | Crimson Energy Partners, L.P. | Briscoe #13 | 6,000 | 12733381 |
| 623064 | Jul 24, 2006 | Jul 24, 2006 | Escondido Resources GP, LLC | Briscoe, Dolph "E" #53 | 8,000 | 12733380 |
| 623060 | Jul 24, 2006 | Jul 24, 2006 | Escondido Resources GP, LLC | Briscoe, Dolph "A" #52 | 8,000 | 12733379 |
| 622723 | Jul 20, 2006 | Jul 20, 2006 | Exploration Company, The | South Pena Creek Unit #506 | 3,400 | 12733378 |
| 622722 | Jul 20, 2006 | Jul 20, 2006 | Exploration Company, The | South Pena Creek Unit #502 | 3,400 | 12733377 |
| 622720 | Jul 20, 2006 | Jul 20, 2006 | Exploration Company, The | South Pena Creek Unit #501 | 3,400 | 12733376 |
| 622697 | Jul 20, 2006 | Jul 20, 2006 | Exploration Company, The | Pena Creek Unit #137 | 3,400 | 12733375 |
| 622694 | Jul 20, 2006 | Jul 20, 2006 | Exploration Company, The | Pena Creek Unit #136 | 3,400 | 12733374 |
| 622556 | Jul 18, 2006 | Jul 18, 2006 | Encana Oil & Gas(usa) Inc. | Comanche Ranch #1660HH | 7,000 | 12733373 |
| 622287 | Jul 11, 2006 | Jul 11, 2006 | Crimson Energy Partners, L.P. | Briscoe #12 | 6,000 | 12733372 |
| 622199 | Jul 10, 2006 | Jul 10, 2006 | Hamilton, J. R. | Hamilton, J.R. #1101 | 3,500 | 12733371 |
| 622142 | Jul 10, 2006 | Jul 10, 2006 | Ampak Oil Company | Bermuda #1H | 10,500 | 12732994 |
| 622141 | Jul 10, 2006 | Jul 10, 2006 | Ampak Oil Company | James #1H | 10,500 | 12733060 |
| 621909 | Jul 7, 2006 | Jul 7, 2006 | Sage Energy Company | Bray #1HH | 6,500 | 12733366 |
| 621909Amendment | Jul 7, 2006 | Jul 7, 2006 | Sage Energy Company | Bray #1HH | 5,100 | 12733366 |
| 621909Amendment | Jul 7, 2006 | Jul 7, 2006 | Sage Energy Company | Bray #1HH | 6,591 | 12733366 |
| 621965 | Jul 3, 2006 | Jul 3, 2006 | Escondido Resources GP, LLC | Chip Briscoe "A" #46 | 8,000 | 12733369 |
| 621964 | Jul 3, 2006 | Jul 3, 2006 | Escondido Resources GP, LLC | Chip Briscoe "A" #45 | 8,000 | 12733368 |
| 621963 | Jul 3, 2006 | Jul 3, 2006 | Escondido Resources GP, LLC | Chip Briscoe "A" #44 | 8,000 | 12733367 |
| 621682 | Jun 27, 2006 | Jun 27, 2006 | Exploration Company, The | South Pena Creek Unit #505 | 3,600 | 12733365 |
| 621506 | Jun 23, 2006 | Jun 23, 2006 | CMR Energy, L.P. | Comanche Ranch #4046HH | 9,000 | 12733364 |
| 621429 | Jun 22, 2006 | Jun 22, 2006 | Crimson Energy Partners, L.P. | Briscoe #11 | 6,000 | 12733363 |
| 621151 | Jun 21, 2006 | Jun 21, 2006 | Exploration Company, The | Pena Creek Unit #91 | 3,600 | 12733362 |
| 621224 | Jun 19, 2006 | Jun 19, 2006 | Escondido Resources GP, LLC | Briscoe, Dolph "B" #43 | 8,000 | 12733361 |
| 621221 | Jun 19, 2006 | Jun 19, 2006 | Escondido Resources GP, LLC | Briscoe, Dolph "B" #42 | 8,000 | 12733360 |
| 621160 | Jun 16, 2006 | Jun 16, 2006 | Exploration Company, The | South Pena Creek Unit #510 | 3,600 | 12733359 |
| 620809 | Jun 16, 2006 | Jun 16, 2006 | Sage Energy Company | Dimmit-Wood #1HH | 7,000 | 12733251 |
| 621014 | Jun 14, 2006 | Jun 14, 2006 | Escondido Resources GP, LLC | Dolph Briscoe "B" #41 | 8,000 | 12733358 |
| 620949 | Jun 14, 2006 | Jun 14, 2006 | Escondido Resources GP, LLC | Dolph Briscoe "A" #40 | 8,000 | 12733357 |
| 620698 | Jun 9, 2006 | Jun 9, 2006 | Crimson Energy Partners, L.P. | Briscoe #10 | 6,000 | 12733356 |
| 620338 | Jun 5, 2006 | Jun 5, 2006 | Sage Energy Company | Jasik #3REH | 6,900 | 12733032 |
| 620208 | Jun 5, 2006 | Jun 5, 2006 | Exploration Company, The | Pena Creek Unit #134 | 3,600 | 12733355 |
| 620206 | Jun 5, 2006 | Jun 5, 2006 | Exploration Company, The | Pena Creek Unit #133 | 3,600 | 12733354 |
| 619717 | May 31, 2006 | May 31, 2006 | Carrizo Exploration, Inc. | Soldiers Lake W "A" #2 | 3,800 | 12733350 |
| 620041 | May 26, 2006 | May 26, 2006 | Hurd Enterprises, Ltd. | Kone Estate "B" #1 | 10,000 | 12733353 |
| 620039 | May 26, 2006 | May 26, 2006 | Hurd Enterprises, Ltd. | Kone Estate "F" #1 | 10,000 | 12733352 |
| 620021 | May 26, 2006 | May 26, 2006 | Exploration Company, The | Pena Creek Unit #178 | 3,600 | 12733351 |
| 619933 | May 25, 2006 | May 25, 2006 | Crimson Energy Partners, L.P. | Briscoe #9 | 6,000 | 12733349 |
| 619367 | May 19, 2006 | May 19, 2006 | Encana Oil & Gas(usa) Inc. | Covert, F. M. #1472HH | 7,200 | 12733348 |
| 618794 | May 17, 2006 | May 17, 2006 | Exploration Company, The | Pena Creek Unit #231 | 3,600 | 12733345 |
| 619085 | May 11, 2006 | May 11, 2006 | Escondido Resources GP, LLC | Briscoe #26 | 6,000 | 12733346 |
| 618537 | May 10, 2006 | May 10, 2006 | Crimson Energy Partners, L.P. | Briscoe #8 | 6,000 | 12733341 |
| 618979 | May 9, 2006 | May 9, 2006 | Sage Energy Company | Kothmann #1HH | 6,300 | 12733344 |
| 618979Amendment | May 9, 2006 | May 9, 2006 | Sage Energy Company | Kothmann #1HH | 6,300 | 12733344 |
| 618979Amendment | May 9, 2006 | May 9, 2006 | Sage Energy Company | Kothmann #1HH | 6,300 | 12733344 |
| 618847 | May 8, 2006 | May 8, 2006 | Sabco Operating Company | Elaine (5100) Unit #96 | 5,500 | 12733343 |
| 618791 | May 8, 2006 | May 8, 2006 | Exploration Company, The | Pena Creek Unit #230 | 3,600 | 12733342 |
| 618455 | May 1, 2006 | May 1, 2006 | Escondido Resources GP, LLC | Briscoe #23 | 6,000 | 12733340 |
| 618348 | Apr 28, 2006 | Apr 28, 2006 | Crimson Energy Partners, L.P. | Briscoe #7 | 6,000 | 12733339 |
| 617309 | Apr 28, 2006 | Apr 28, 2006 | CMR Energy, L.P. | Comanche Ranch #2046STH | 9,000 | 12733217 |
| 617309Amendment | Apr 28, 2006 | Apr 28, 2006 | CMR Energy, L.P. | Comanche Ranch #2046STH | 9,000 | 12733217 |
| 617919 | Apr 27, 2006 | Apr 27, 2006 | Encana Oil & Gas(usa) Inc. | Myers #1682HH | 7,200 | 12733338 |
| 617745 | Apr 25, 2006 | Apr 25, 2006 | Exploration Company, The | South Pena Creek Unit #417 | 3,600 | 12733337 |
| 617738 | Apr 25, 2006 | Apr 25, 2006 | Exploration Company, The | South Pena Creek Unit #437 | 3,600 | 12733336 |
| 617947 | Apr 20, 2006 | Apr 20, 2006 | Hawthorn Energy Partners, LLC | Baty #731HH | 9,000 | 12733023 |
| 617947Amendment | Apr 20, 2006 | Apr 20, 2006 | Hawthorn Energy Partners, LLC | Baty #731HH | 9,000 | 12733023 |
| 617731 | Apr 18, 2006 | Apr 18, 2006 | Crimson Energy Partners, L.P. | Briscoe #6 | 6,000 | 12733335 |
| 616568 | Mar 28, 2006 | Mar 28, 2006 | Crimson Energy Partners, L.P. | Briscoe #5 | 6,000 | 12733334 |
| 616439 | Mar 27, 2006 | Mar 27, 2006 | Crimson Energy Partners, L.P. | Briscoe #4 | 6,000 | 12733333 |
| 615961 | Mar 17, 2006 | Mar 17, 2006 | Sage Energy Company | Tortuga C #5H | 6,600 | 12733332 |
| 615961Amendment | Mar 17, 2006 | Mar 17, 2006 | Sage Energy Company | Tortuga C #5H | 6,600 | 12733332 |
| 615588 | Mar 10, 2006 | Mar 10, 2006 | Hamilton, J. R. | Kothman Barnard #5 | 2,910 | 12732429 |
| 615588Amendment | Mar 10, 2006 | Mar 10, 2006 | Hamilton, J. R. | Kothman Barnard #5 | 2,910 | 12732429 |
| 615589 | Mar 9, 2006 | Mar 9, 2006 | Hamilton, J. R. | Hamilton Trust 19 #1 | 3,500 | 12700110 |
| 615589Amendment | Mar 9, 2006 | Mar 9, 2006 | Hamilton, J. R. | Hamilton Trust 19 #1 | 3,500 | 12700110 |
| 615587 | Mar 9, 2006 | Mar 9, 2006 | Hamilton, J. R. | Hamilton Trust 9 #3 | 3,500 | 12733331 |
| 615587Amendment | Mar 9, 2006 | Mar 9, 2006 | Hamilton, J. R. | Hamilton Trust 9 #3 | 3,500 | 12733331 |
| 615544 | Mar 9, 2006 | Mar 9, 2006 | Crimson Energy Partners, L.P. | Briscoe #3 | 6,000 | 12733328 |
| 615111 | Mar 8, 2006 | Mar 8, 2006 | Escondido Resources GP, LLC | Briscoe #36 | 5,800 | 12733325 |
| 615096 | Mar 8, 2006 | Mar 8, 2006 | Escondido Resources GP, LLC | Briscoe #29 | 5,800 | 12733327 |
| 615093 | Mar 8, 2006 | Mar 8, 2006 | Escondido Resources GP, LLC | Briscoe #25 | 5,800 | 12733318 |
| 613687 | Feb 15, 2006 | Feb 15, 2006 | Escondido Resources GP, LLC | Briscoe #22 | 5,800 | 12733317 |
| 613683 | Feb 15, 2006 | Feb 15, 2006 | Escondido Resources GP, LLC | Briscoe #24 | 5,800 | 12733315 |
| 613683Amendment | Feb 15, 2006 | Feb 15, 2006 | Escondido Resources GP, LLC | Briscoe #24 | 5,800 | 12733315 |