| 653516Amendment | Mar 11, 2008 | Mar 11, 2008 | Tidal Petroleum, Inc. | Law #1 | 10,500 | 02533560 |
| 656200 | Mar 7, 2008 | Mar 7, 2008 | Pioneer Natural Res. USA, Inc. | Overby #2EH | 17,000 | 02533559 |
| 656139 | Mar 6, 2008 | Mar 6, 2008 | United Resources LP | Knight Ranch #5 | 11,500 | 02533558 |
| 655825 | Mar 3, 2008 | Mar 3, 2008 | Anderson Oil Ltd. | O'Brien #1 | 5,600 | 02533499 |
| 655983 | Feb 28, 2008 | Feb 28, 2008 | Pioneer Natural Res. USA, Inc. | Erna P. Benham Gas Unit #7H | 17,000 | 02533557 |
| 655113 | Feb 21, 2008 | Feb 21, 2008 | Pioneer Natural Res. USA, Inc. | Monteola Gas Unit #1 | 17,500 | 02533555 |
| 654963 | Feb 20, 2008 | Feb 20, 2008 | North Shore Energy, L.L.C. | Nse O'Brien #1 | 5,500 | 02533465 |
| 651726 | Feb 20, 2008 | Feb 20, 2008 | Staples, James W. Prod. Co. | Dougherty Estate #2 | 3,652 | 02531191 |
| 654667 | Feb 15, 2008 | Feb 15, 2008 | Whitesands Operating, L.L.C. | Wolters #2 | 4,600 | 02533554 |
| 654758 | Feb 14, 2008 | Feb 14, 2008 | North Shore Energy, L.L.C. | Nse O'Brien #2 | 5,200 | 02533518 |
| 654758Amendment | Feb 14, 2008 | Feb 14, 2008 | North Shore Energy, L.L.C. | Nse O'Brien #2 | 5,200 | 02533518 |
| 654105 | Feb 7, 2008 | Feb 7, 2008 | Pioneer Natural Res. USA, Inc. | O'Neal Gas Unit #14H | 17,000 | 02533553 |
| 652337 | Jan 16, 2008 | Jan 16, 2008 | Pioneer Natural Res. USA, Inc. | Tomasek Gas Unit #3SW | 3,800 | 02533552 |
| 651493 | Dec 20, 2007 | Dec 20, 2007 | Gaither Petroleum Corporation | Dahl #1 | 3,500 | 02533549 |
| 651493Amendment | Dec 20, 2007 | Dec 20, 2007 | Gaither Petroleum Corporation | Dahl #1 | 3,500 | 02533549 |
| 651169 | Dec 17, 2007 | Dec 17, 2007 | Pioneer Natural Res. USA, Inc. | Mansker Ranch Gas Unit #6H | 17,000 | 02533548 |
| 650462 | Dec 10, 2007 | Dec 10, 2007 | Gaither Petroleum Corporation | Dirks #1 | 4,100 | 02533547 |
| 650238 | Dec 5, 2007 | Dec 5, 2007 | Choice Exploration, Inc. | Smith #1 | 5,000 | 02533546 |
| 649933 | Nov 29, 2007 | Nov 29, 2007 | Kaler Energy Corp. | Bear Creek Ranch Partners #1 | 2,200 | 02533545 |
| 649900 | Nov 28, 2007 | Nov 28, 2007 | United Resources LP | Davis #1 | 12,000 | 02533544 |
| 649900Amendment | Nov 28, 2007 | Nov 28, 2007 | United Resources LP | Davis #1 | 12,000 | 02533544 |
| 649565 | Nov 19, 2007 | Nov 19, 2007 | United Resources LP | Knight Ranch #4 | 11,500 | 02533542 |
| 649565Amendment | Nov 19, 2007 | Nov 19, 2007 | Newfield Exploration Company | Knight Ranch #4 | 11,500 | 02533542 |
| 649565Amendment | Nov 19, 2007 | Nov 19, 2007 | Newfield Exploration Company | Knight Ranch #4 | 10,500 | 02533542 |
| 649388 | Nov 16, 2007 | Nov 16, 2007 | Anderson Oil Ltd. | Eberstadt #9 | 5,800 | 02533541 |
| 649388Amendment | Nov 16, 2007 | Nov 16, 2007 | Anderson Oil Ltd. | Eberstadt #9 | 5,800 | 02533541 |
| 647946 | Oct 24, 2007 | Oct 24, 2007 | Pioneer Natural Res. USA, Inc. | Mansker Ranch G.U. #5H | 17,000 | 02533539 |
| 647019 | Oct 24, 2007 | Oct 24, 2007 | Continental Operating Co. | Dougherty #1 | 10,100 | 02533540 |
| 646790 | Oct 1, 2007 | Oct 1, 2007 | Legend Natural Gas II, LP | Npu (Hartzendorf 1) #58 | 12,000 | 02533538 |
| 646380 | Sep 25, 2007 | Sep 25, 2007 | North Shore Energy, L.L.C. | Nse O'Brien #3 | 6,000 | 02533537 |
| 646154 | Sep 20, 2007 | Sep 20, 2007 | Legend Natural Gas II, LP | Npu (Ray 119) #54 | 12,000 | 02533536 |
| 646154Amendment | Sep 20, 2007 | Sep 20, 2007 | Legend Natural Gas II, LP | Npu (Ray 119) #54 | 12,000 | 02533536 |
| 645745 | Sep 12, 2007 | Sep 12, 2007 | Petrohawk Operating Company | Heard, C. E. "B" #45 | 5,500 | 02533535 |
| 645745Amendment | Sep 12, 2007 | Sep 12, 2007 | Milagro Exploration, LLC | Heard, C. E. "B" #45 | 5,500 | 02533535 |
| 645650 | Sep 10, 2007 | Sep 10, 2007 | Petrohawk Operating Company | Heard, C.E. "B" #44 | 5,500 | 02533534 |
| 645648 | Sep 7, 2007 | Sep 7, 2007 | Petrohawk Operating Company | Heard, C.E. "B" #43 | 5,500 | 02533533 |
| 645644 | Sep 7, 2007 | Sep 7, 2007 | Petrohawk Operating Company | Heard, C.E. "B" #42 | 5,500 | 02533532 |
| 645184 | Aug 29, 2007 | Aug 29, 2007 | United Resources LP | Lopez #1 | 11,500 | 02533531 |
| 645161 | Aug 29, 2007 | Aug 29, 2007 | Prime Operating Company | Brooks Trust #1 | 9,500 | 02533009 |
| 642433 | Aug 28, 2007 | Aug 28, 2007 | Enco Exploration Company | Collier #12 | 4,100 | 02533524 |
| 642433Amendment | Aug 28, 2007 | Aug 28, 2007 | Enco Exploration Company | Collier #12 | 4,700 | 02533524 |
| 641148 | Aug 28, 2007 | Aug 28, 2007 | Enco Exploration Company | Collier #11 | 4,100 | 02533745 |
| 554506Amendment | Aug 28, 2007 | Aug 28, 2007 | Enco Exploration Company | Collier #3 | 5,053 | 02533309 |
| 554506Amendment | Aug 28, 2007 | Aug 28, 2007 | Enco Exploration Company | Collier #3 | 10,347 | 02533309 |
| 644928 | Aug 24, 2007 | Aug 24, 2007 | Legend Natural Gas II, LP | Ray #115 | 12,000 | 02533530 |
| 642888 | Aug 24, 2007 | Aug 24, 2007 | Howard Exploration, Inc. | Roy Hanus #1 | 3,800 | 02533516 |
| 644784 | Aug 22, 2007 | Aug 22, 2007 | Petrohawk Operating Company | Heard, C. E. "B" #41 | 5,200 | 02533529 |
| 644782 | Aug 22, 2007 | Aug 22, 2007 | Petrohawk Operating Company | Heard, C. E. "B" #40 | 5,200 | 02533528 |
| 644779 | Aug 22, 2007 | Aug 22, 2007 | Petrohawk Operating Company | Heard, C. E. "B" #39 | 5,200 | 02533527 |
| 644394 | Aug 16, 2007 | Aug 16, 2007 | Garrison Ltd. | O'Brien #1 | 4,000 | 02533525 |
| 644040 | Aug 15, 2007 | Aug 15, 2007 | Continental Exploration, L.L.C. | Finger Estate #1 | 4,000 | 02533523 |
| 643586 | Aug 13, 2007 | Aug 13, 2007 | Hughes, Dan A. Company, L.P. | Knight-Turnbow Gas Unit #1 | 12,000 | 02533520 |
| 643925 | Aug 10, 2007 | Aug 10, 2007 | Legend Natural Gas II, LP | Npu (Ray 112) #56 | 12,000 | 02533522 |
| 643917 | Aug 10, 2007 | Aug 10, 2007 | Legend Natural Gas II, LP | Npu (Ray 121) #57 | 12,000 | 02533521 |
| 641251 | Aug 8, 2007 | Aug 8, 2007 | Petrohawk Operating Company | Heard, C. E. "B" #38 | 5,200 | 02533504 |
| 643475 | Aug 7, 2007 | Aug 7, 2007 | Legend Natural Gas II, LP | B. U. Dahl #2 | 12,000 | 02533519 |
| 643475Amendment | Aug 7, 2007 | Aug 7, 2007 | Legend Natural Gas II, LP | Dahl, B. U. #2 | 12,000 | 02533519 |
| 643475Amendment | Aug 7, 2007 | Aug 7, 2007 | Legend Natural Gas II, LP | Dahl, B. U. #2 | 12,000 | 02533519 |
| 643432 | Aug 7, 2007 | Aug 7, 2007 | North Shore Energy, L.L.C. | Nse O'Brien #2 | 6,000 | 02533518 |
| 639326Amendment | Aug 4, 2007 | Aug 4, 2007 | Wallis Energy, Inc. | Larakers Unit #1 | 12,700 | 02533484 |
| 643366 | Aug 3, 2007 | Aug 3, 2007 | Legend Natural Gas II, LP | BU-Henderson #1 | 12,000 | 02533517 |
| 642560 | Jul 30, 2007 | Jul 30, 2007 | Pioneer Natural Res. USA, Inc. | Winnie Madge Going Gas Unit #3H | 17,000 | 02533514 |
| 642559 | Jul 27, 2007 | Jul 27, 2007 | Pioneer Natural Res. USA, Inc. | Mansker Ranch Gas Unit #4H | 17,000 | 02533515 |
| 642556 | Jul 27, 2007 | Jul 27, 2007 | Pioneer Natural Res. USA, Inc. | Tomasek Gas Unit #9H | 17,000 | 02533513 |
| 636730Amendment | Jul 27, 2007 | Jul 27, 2007 | Enduring Resources, LLC | Johnston Gas Unit #2 #1H | 13,500 | 02533469 |
| 642456 | Jul 24, 2007 | Jul 24, 2007 | Welder Exploration & Prod., Inc. | Lauren #1 | 5,000 | 02533512 |
| 642271 | Jul 20, 2007 | Jul 20, 2007 | Hughes, Dan A. Company, L.P. | Johnston #4 | 18,500 | 02533511 |
| 642271Amendment | Jul 20, 2007 | Jul 20, 2007 | Hughes, Dan A. Company, L.P. | Johnston #4ST | 15,700 | 02533511 |
| 642271Amendment | Jul 20, 2007 | Jul 20, 2007 | Hughes, Dan A. Company, L.P. | Johnston #4ST | 15,700 | 02533511 |
| 642100 | Jul 17, 2007 | Jul 17, 2007 | Abraxas Petroleum Corporation | Sutherland #1 | 10,500 | 02533510 |
| 641761 | Jul 16, 2007 | Jul 16, 2007 | Neuhaus, V. F. Properties, Inc. | Neuhaus-Grissom #2 | 6,000 | 02533508 |
| 641814 | Jul 13, 2007 | Jul 13, 2007 | Hughes, Dan A. Company, L.P. | Austin Brown #7 | 12,300 | 02533509 |
| 641814Amendment | Jul 13, 2007 | Jul 13, 2007 | Hughes, Dan A. Company, L.P. | Austin Brown #7ST | 12,300 | 02533509 |
| 641426 | Jul 9, 2007 | Jul 9, 2007 | Welder Exploration & Prod., Inc. | Edler, J. B. #35 | 5,000 | 02533507 |
| 641426Amendment | Jul 9, 2007 | Jul 9, 2007 | Welder Exploration & Prod., Inc. | Edler, J. B. #35 | 5,000 | 02533507 |
| 641417 | Jul 6, 2007 | Jul 6, 2007 | Welder Exploration & Prod., Inc. | Davis, Nona Berry #61 | 5,000 | 02533506 |
| 641417Amendment | Jul 6, 2007 | Jul 6, 2007 | Welder Exploration & Prod., Inc. | Davis, Nona Berry #61 | 5,000 | 02533506 |
| 641328 | Jul 6, 2007 | Jul 6, 2007 | Gaither Petroleum Corporation | Ray #1 | 4,000 | 02533505 |
| 641328Amendment | Jul 6, 2007 | Jul 6, 2007 | Gaither Petroleum Corporation | Ray #1ST | 4,000 | 02533505 |
| 641231 | Jul 3, 2007 | Jul 3, 2007 | Welder Exploration & Prod., Inc. | Edler, J. B. #37 | 5,000 | 02533503 |
| 641231Amendment | Jul 3, 2007 | Jul 3, 2007 | Welder Exploration & Prod., Inc. | Edler, J. B. #37 | 5,000 | 02533503 |
| 641226 | Jul 3, 2007 | Jul 3, 2007 | Welder Exploration & Prod., Inc. | Edler, J.B. #43 | 5,000 | 02533502 |
| 641226Amendment | Jul 3, 2007 | Jul 3, 2007 | Welder Exploration & Prod., Inc. | Edler, J.B. #43 | 5,000 | 02533502 |
| 641221 | Jul 3, 2007 | Jul 3, 2007 | Welder Exploration & Prod., Inc. | Edler, J.B. #26 | 5,000 | 02533501 |
| 640938 | Jul 3, 2007 | Jul 3, 2007 | Petrohawk Operating Company | Heard, C. E. "B" #32 | 5,200 | 02533500 |
| 640537 | Jul 3, 2007 | Jul 3, 2007 | Petrohawk Operating Company | Heard, C. E. "B" #36 | 5,200 | 02533495 |
| 640534 | Jul 3, 2007 | Jul 3, 2007 | Petrohawk Operating Company | Heard, C. E. "B" #35 | 5,200 | 02533494 |
| 640876 | Jun 27, 2007 | Jun 27, 2007 | Anderson Oil Ltd. | O'Brien #1 | 5,600 | 02533499 |
| 640799 | Jun 27, 2007 | Jun 27, 2007 | Legend Natural Gas II, LP | Ray #124 | 12,000 | 02533498 |
| 640539 | Jun 27, 2007 | Jun 27, 2007 | Petrohawk Operating Company | Heard, C. E. "B" #37 | 5,200 | 02533496 |
| 639212 | Jun 26, 2007 | Jun 26, 2007 | Gaither Petroleum Corporation | Mitchell #1 | 4,100 | 02533483 |
| 639212Amendment | Jun 26, 2007 | Jun 26, 2007 | Gaither Petroleum Corporation | Mitchell #1 | 4,100 | 02533483 |
| 639994 | Jun 18, 2007 | Jun 18, 2007 | Continental Operating Co. | Luckenbach #1 | 11,000 | 02533497 |
| 639890 | Jun 8, 2007 | Jun 8, 2007 | Legend Natural Gas II, LP | Ray #120 | 12,000 | 02533493 |
| 639744 | Jun 4, 2007 | Jun 4, 2007 | Pioneer Natural Res. USA, Inc. | O'Neal Gas Unit #13H | 17,000 | 02533492 |
| 639623 | May 30, 2007 | May 30, 2007 | Aurora Resources Corporation | O'Brien, J. M. #1 | 6,500 | 02533491 |
| 639055 | May 30, 2007 | May 30, 2007 | Welder Exploration & Prod., Inc. | Edler, J. B. #28 | 5,000 | 02533487 |
| 639055Amendment | May 30, 2007 | May 30, 2007 | Welder Exploration & Prod., Inc. | Edler, J. B. #28 | 5,000 | 02533487 |
| 639009 | May 30, 2007 | May 30, 2007 | Welder Exploration & Prod., Inc. | Edler, J. B. #29 | 5,000 | 02533485 |
| 639009Amendment | May 30, 2007 | May 30, 2007 | Welder Exploration & Prod., Inc. | Davis, Nona Berry #62 | 5,000 | 02533485 |