| 665592 | Jul 17, 2008 | Jul 17, 2008 | Bopco, L.P. | El Coyote Ranch #5 | 13,300 | 04732356 |
| 665123 | Jul 14, 2008 | Jul 14, 2008 | Mestena Operating, Ltd. | La Presa #14 | 12,000 | 04732354 |
| 665127 | Jul 10, 2008 | Jul 10, 2008 | Coronado Energy E&P Company, LLC | McGill Bros. #620 | 13,095 | 04732355 |
| 664688 | Jul 3, 2008 | Jul 3, 2008 | Newfield Exploration Company | Skipper #5 | 13,000 | 04732353 |
| 664344 | Jul 1, 2008 | Jul 1, 2008 | Newfield Exploration Company | Santa FE Ranch #202 | 19,000 | 04732352 |
| 664253 | Jun 28, 2008 | Jun 28, 2008 | J & R Contractors | Martinez Gas Unit #2 | 11,000 | 04732255 |
| 664179 | Jun 27, 2008 | Jun 27, 2008 | Newfield Exploration Company | Santa FE Ranch #201 | 19,000 | 04732351 |
| 664062 | Jun 25, 2008 | Jun 25, 2008 | Newfield Exploration Company | Villarreal #1 | 13,500 | 04732350 |
| 663743 | Jun 25, 2008 | Jun 25, 2008 | Erskine Energy, LLC | Sullivan #A 6 | 15,500 | 04732349 |
| 663743Amendment | Jun 25, 2008 | Jun 25, 2008 | Erskine Energy, LLC | Sullivan #A 6 | 15,500 | 04732349 |
| 663592 | Jun 21, 2008 | Jun 21, 2008 | Pogo Producing Company LLC | Garcia Gas Unit #3 | 9,550 | 04732347 |
| 663591 | Jun 21, 2008 | Jun 21, 2008 | Pogo Producing Company LLC | Garcia Gas Unit #2 | 9,460 | 04732348 |
| 663585 | Jun 21, 2008 | Jun 21, 2008 | Pogo Producing Company LLC | Mills Bennett #2 | 9,120 | 04732346 |
| 663299 | Jun 18, 2008 | Jun 18, 2008 | Newfield Exploration Company | Skipper #7 | 13,000 | 04732345 |
| 657712 | Jun 18, 2008 | Jun 18, 2008 | Exxon Mobil Corporation | McGill Bros. #385D | 5,910 | 04701622 |
| 663207 | Jun 17, 2008 | Jun 17, 2008 | Exxon Mobil Corporation | Sullivan, D. J. "F" #38 | 9,500 | 04732344 |
| 662239 | Jun 6, 2008 | Jun 6, 2008 | SE USA Operating, Inc. | Scott & Hopper #3 | 10,500 | 04732053 |
| 662237 | Jun 6, 2008 | Jun 6, 2008 | Mestena Operating, Ltd. | La Presa #13 | 11,000 | 04732343 |
| 662222 | Jun 5, 2008 | Jun 5, 2008 | Mestena Operating, Ltd. | Las Perlas #2 | 11,000 | 04732342 |
| 661320 | May 28, 2008 | May 28, 2008 | Mestena Operating, Ltd. | La Presa #12 | 11,000 | 04732340 |
| 661443 | May 23, 2008 | May 23, 2008 | Newfield Exploration Company | Skipper #6 | 13,000 | 04732341 |
| 661291 | May 22, 2008 | May 22, 2008 | Coronado Energy E&P Company, LLC | McGill Bros. #618 | 12,760 | 04732339 |
| 661014 | May 20, 2008 | May 20, 2008 | Coronado Energy E&P Company, LLC | McGill Bros. #619 | 13,035 | 04732338 |
| 660015 | May 7, 2008 | May 7, 2008 | Erskine Energy, LLC | Sullivan #18 | 12,800 | 04732337 |
| 659887 | Apr 30, 2008 | Apr 30, 2008 | Crimson Exploration Oper., Inc. | Cage Estate #G 4 | 12,000 | 04732336 |
| 659690 | Apr 28, 2008 | Apr 28, 2008 | Mestena Operating, Ltd. | Las Perlas #1 | 11,000 | 04732335 |
| 641695Amendment | Apr 12, 2008 | Apr 12, 2008 | Brigham Oil & Gas, L.P. | Sullivan, D. J. "F" #35 | 13,000 | 04732303 |
| 656142 | Apr 8, 2008 | Apr 8, 2008 | Goldston Oil Corporation | Myrick #2 | 9,600 | 04732271 |
| 657356 | Mar 26, 2008 | Mar 26, 2008 | Erskine Energy, LLC | Sullivan #A 5 | 15,000 | 04732334 |
| 656682 | Mar 26, 2008 | Mar 26, 2008 | Erskine Energy, LLC | Sullivan Deep "C" Gas Unit No. 1 #4 | 15,000 | 04732331 |
| 656934 | Mar 20, 2008 | Mar 20, 2008 | Erskine Energy, LLC | Sullivan #H 3 | 12,500 | 04732332 |
| 656934Amendment | Mar 20, 2008 | Mar 20, 2008 | Erskine Energy, LLC | Sullivan #H 3 | 12,500 | 04732332 |
| 657403 | Mar 14, 2008 | Mar 14, 2008 | Beckham Resources, Inc. | Perez #1 | 10,700 | 04732333 |
| 657403Amendment | Mar 14, 2008 | Mar 14, 2008 | Beckham Resources, Inc. | Perez #1 | 10,700 | 04732333 |
| 655602 | Feb 26, 2008 | Feb 26, 2008 | Samson Lone Star, LLC | Glick Twins #1 | 10,500 | 04732330 |
| 655489 | Feb 25, 2008 | Feb 25, 2008 | Coronado Energy E&P Company, LLC | McGill Bros. #616 | 12,800 | 04732329 |
| 654350 | Feb 8, 2008 | Feb 8, 2008 | Erskine Energy, LLC | Sullivan #17 | 12,800 | 04732328 |
| 653963 | Feb 5, 2008 | Feb 5, 2008 | Exxon Mobil Corporation | Kelsey Unit #M413D | 4,700 | 04701672 |
| 652673 | Jan 15, 2008 | Jan 15, 2008 | Mestena Operating, Ltd. | La Presa #11 | 12,000 | 04732327 |
| 652464 | Jan 14, 2008 | Jan 14, 2008 | Mestena Operating, Ltd. | La Presa #10 | 11,000 | 04732326 |
| 652109 | Jan 9, 2008 | Jan 9, 2008 | Edge Petroleum Oper. Co., Inc. | Lopez #26 | 10,000 | 04732325 |
| 652109Amendment | Jan 9, 2008 | Jan 9, 2008 | Edge Petroleum Oper. Co., Inc. | Lopez #26 | 10,000 | 04732325 |
| 650739 | Jan 4, 2008 | Jan 4, 2008 | Brigham Oil & Gas, L.P. | Sullivan, D.J. C #39 | 13,000 | 04732324 |
| 649566 | Dec 20, 2007 | Dec 20, 2007 | Brigham Oil & Gas, L.P. | Sullivan, D. J. C #38 | 14,200 | 04732323 |
| 649487 | Nov 16, 2007 | Nov 16, 2007 | Chevron U. S. A. Inc. | Lopez, G. G. #10 | 10,500 | 04732110 |
| 649449 | Nov 16, 2007 | Nov 16, 2007 | Coronado Energy E&P Company, LLC | McGill Bros. #615 | 11,500 | 04732322 |
| 649440 | Nov 16, 2007 | Nov 16, 2007 | Coronado Energy E&P Company, LLC | McGill Bros. #613 | 11,500 | 04732321 |
| 649186 | Nov 14, 2007 | Nov 14, 2007 | Newfield Exploration Company | La Rucia Ranch #30 | 12,000 | 04732320 |
| 648806 | Nov 8, 2007 | Nov 8, 2007 | Range Production Company | Garcia 5 #2 | 8,500 | 04700820 |
| 647823 | Oct 18, 2007 | Oct 18, 2007 | Samson Lone Star, LLC | Skipper #3 | 10,500 | 04732319 |
| 646034 | Sep 21, 2007 | Sep 21, 2007 | Chevron U. S. A. Inc. | McGill Bros. NCT-1 #21 | 9,050 | 04700877 |
| 645834 | Sep 14, 2007 | Sep 14, 2007 | Mestena Operating, Ltd. | North Primavera #1 | 9,000 | 04732318 |
| 645826 | Sep 14, 2007 | Sep 14, 2007 | Mestena Operating, Ltd. | Primavera #1 | 9,000 | 04732317 |
| 643116 | Aug 17, 2007 | Aug 17, 2007 | Petrohawk Operating Company | Palo Blanco Gas Unit #6 | 11,400 | 04732316 |
| 643116Amendment | Aug 17, 2007 | Aug 17, 2007 | Petrohawk Operating Company | Palo Blanco Gas Unit #6 | 12,000 | 04732316 |
| 643116Amendment | Aug 17, 2007 | Aug 17, 2007 | Milagro Exploration, LLC | Palo Blanco Gas Unit #6 | 12,000 | 04732316 |
| 644238 | Aug 15, 2007 | Aug 15, 2007 | Ascent Operating, LP | Wagenschein - State #1 | 10,800 | 04732315 |
| 644139 | Aug 13, 2007 | Aug 13, 2007 | Peoples Energy Prod.-TX, L.P. | McGill Bros. #612 | 12,800 | 04732314 |
| 643791 | Aug 10, 2007 | Aug 10, 2007 | Mestena Operating, Ltd. | La Presa #9 | 11,000 | 04732312 |
| 643786 | Aug 10, 2007 | Aug 10, 2007 | Mestena Operating, Ltd. | La Presa #8 | 11,000 | 04732311 |
| 643781 | Aug 10, 2007 | Aug 10, 2007 | Mestena Operating, Ltd. | La Presa #7 | 11,000 | 04732310 |
| 643766 | Aug 10, 2007 | Aug 10, 2007 | Mestena Operating, Ltd. | La Presa #6 | 11,000 | 04732313 |
| 643621 | Aug 8, 2007 | Aug 8, 2007 | Peoples Energy Prod.-TX, L.P. | McGill Bros. #610 | 13,500 | 04732309 |
| 643408 | Aug 6, 2007 | Aug 6, 2007 | Samson Lone Star, LLC | H. Lopez #7 | 13,000 | 04732307 |
| 643407 | Aug 6, 2007 | Aug 6, 2007 | Samson Lone Star, LLC | H. Lopez #2 | 13,000 | 04732308 |
| 643407Amendment | Aug 6, 2007 | Aug 6, 2007 | Pogo Producing Company LLC | H. Lopez #2 | 12,000 | 04732308 |
| 643403 | Aug 6, 2007 | Aug 6, 2007 | Samson Lone Star, LLC | H. Lopez #1 | 13,000 | 04732306 |
| 643403Amendment | Aug 6, 2007 | Aug 6, 2007 | Samson Lone Star, LLC | Lopez, H. #1 | 13,000 | 04732306 |
| 642786 | Jul 31, 2007 | Jul 31, 2007 | Mestena Operating, Ltd. | Ventana #1 | 9,000 | 04732305 |
| 641695 | Jul 13, 2007 | Jul 13, 2007 | Brigham Oil & Gas, L.P. | Sullivan, D. J. F #35 | 13,200 | 04732303 |
| 641695Amendment | Jul 13, 2007 | Jul 13, 2007 | Brigham Oil & Gas, L.P. | Sullivan, D. J. "F" #35 | 13,000 | 04732303 |
| 641553 | Jul 10, 2007 | Jul 10, 2007 | Peoples Energy Prod.-TX, L.P. | McGill Bros. #631 | 12,000 | 04732302 |
| 641133 | Jul 3, 2007 | Jul 3, 2007 | Brigham Oil & Gas, L.P. | Sullivan, D. J. C #36 | 13,800 | 04732301 |
| 640901 | Jun 28, 2007 | Jun 28, 2007 | New Century Exploration, Inc. | Cage Ranch #1 | 10,500 | 04732299 |
| 639886 | Jun 7, 2007 | Jun 7, 2007 | Samson Lone Star LP | Ramirez #1 | 11,000 | 04732298 |
| 639886Amendment | Jun 7, 2007 | Jun 7, 2007 | Samson Lone Star, LLC | Ramirez #1 | 11,500 | 04732298 |
| 639674 | Jun 1, 2007 | Jun 1, 2007 | Petrohawk Operating Company | Flack Unit #1 | 11,400 | 04732297 |
| 638432 | Jun 1, 2007 | Jun 1, 2007 | Erskine Energy, LLC | Sullivan Deep "E" #3 | 15,000 | 04732240 |
| 638583 | May 16, 2007 | May 16, 2007 | Peoples Energy Prod.-TX, L.P. | McGill Bros. #609 | 12,500 | 04732296 |
| 638544 | May 15, 2007 | May 15, 2007 | Chevron U. S. A. Inc. | McGill Bros NCT-1 #26 | 9,200 | 04700869 |
| 638544Amendment | May 15, 2007 | May 15, 2007 | Chevron U. S. A. Inc. | McGill Bros NCT-1 #26 | 9,200 | 04700869 |
| 638382 | May 12, 2007 | May 12, 2007 | Samson Lone Star LP | Mills Bennett #1 | 9,300 | 04732295 |
| 638337 | May 11, 2007 | May 11, 2007 | Petrohawk Operating Company | Palo Blanco Gas Unit #5 | 11,400 | 04732294 |
| 638300 | May 11, 2007 | May 11, 2007 | Brigham Oil & Gas, L.P. | Sullivan, D. J. State #15 | 14,000 | 04732293 |
| 635525 | May 10, 2007 | May 10, 2007 | Synergy Oil & Gas, L.P. | Scott & Hopper #52D | 8,850 | 04731760 |
| 638131 | May 8, 2007 | May 8, 2007 | Chevron U. S. A. Inc. | McGill Bros NCT-1 #83 | 7,000 | 04731761 |
| 637934 | May 4, 2007 | May 4, 2007 | Bopco, L.P. | El Coyote Ranch #4 | 14,500 | 04732292 |
| 637901 | Apr 26, 2007 | Apr 26, 2007 | Abaco Operating, LLC | Santa FE Ranch #1R | 19,000 | 04732291 |
| 636785 | Apr 16, 2007 | Apr 16, 2007 | Abaco Operating, LLC | Sant FE Ranch #1 | 19,000 | 04732290 |
| 636554 | Apr 13, 2007 | Apr 13, 2007 | Samson Lone Star LP | Skipper East #2 | 11,000 | 04732289 |
| 636351 | Apr 9, 2007 | Apr 9, 2007 | Loudon Operating Company, L.L.C. | Lopez #6 | 8,675 | 04732181 |
| 633724 | Mar 12, 2007 | Mar 12, 2007 | Mestena Operating, Ltd. | La Presa #5 | 10,000 | 04732288 |
| 634057 | Feb 28, 2007 | Feb 28, 2007 | Bopco, L.P. | El Coyote Ranch #3 | 14,000 | 04732287 |
| 630706 | Feb 14, 2007 | Feb 14, 2007 | Brigham Oil & Gas, L.P. | Sullivan, D.J. C #35 | 13,000 | 04732279 |
| 632242 | Feb 10, 2007 | Feb 10, 2007 | Mestena Operating, Ltd. | La Presa #4 | 10,000 | 04732284 |
| 633001 | Feb 8, 2007 | Feb 8, 2007 | Petrohawk Operating Company | Palo Blanco Gas Unit #4 | 13,000 | 04732286 |
| 633000 | Feb 7, 2007 | Feb 7, 2007 | Petrohawk Operating Company | Palo Blanco Gas Unit #3 | 13,000 | 04732285 |
| 632465 | Jan 26, 2007 | Jan 26, 2007 | Peoples Energy Prod.-TX, L.P. | McGill Bros. #604 | 12,500 | 04732283 |
| 630522 | Jan 24, 2007 | Jan 24, 2007 | Brigham Oil & Gas, L.P. | Sullivan, D. J. State #14 | 13,800 | 04732277 |
| 632229 | Jan 23, 2007 | Jan 23, 2007 | Peoples Energy Prod.-TX, L.P. | McGill Bros. #606 | 12,000 | 04732282 |