| 637470 | Apr 27, 2007 | Apr 27, 2007 | XTO Energy Inc. | Calvillo Unit #1HH | 12,000 | 25131724 |
| 637470Amendment | Apr 27, 2007 | Apr 27, 2007 | XTO Energy Inc. | Calvillo Unit #1HH | 12,000 | 25131724 |
| 637425 | Apr 27, 2007 | Apr 27, 2007 | Encana Oil & Gas(usa) Inc. | Classic Oaks Unit #7HH | 9,000 | 25131726 |
| 637417 | Apr 27, 2007 | Apr 27, 2007 | Encana Oil & Gas(usa) Inc. | Classic Oaks Unit #6HH | 9,000 | 25131723 |
| 637406 | Apr 27, 2007 | Apr 27, 2007 | Williams Prod. Gulf Coast, L.P. | Cleveland #2HH | 6,600 | 25131722 |
| 637396 | Apr 27, 2007 | Apr 27, 2007 | Encana Oil & Gas(usa) Inc. | Classic Oaks Unit #5HH | 9,000 | 25131721 |
| 637623 | Apr 26, 2007 | Apr 26, 2007 | EOG Resources, Inc. | K.D. Livestock a Unit #3HH | 8,000 | 25131727 |
| 637356 | Apr 26, 2007 | Apr 26, 2007 | Devon Energy Production Co, L.P. | West, Ronald Lynn "A" #2HH | 9,000 | 25131719 |
| 637345 | Apr 26, 2007 | Apr 26, 2007 | Devon Energy Production Co, L.P. | Ruby #1H | 9,000 | 25131718 |
| 637345Amendment | Apr 26, 2007 | Apr 26, 2007 | Devon Energy Production Co, L.P. | Ruby #1H | 9,000 | 25131718 |
| 637575 | Apr 25, 2007 | Apr 25, 2007 | Chesapeake Operating, Inc. | Cruey #1HH | 9,000 | 25131725 |
| 637322 | Apr 25, 2007 | Apr 25, 2007 | EOG Resources, Inc. | Wilson Unit #4HH | 8,400 | 25131715 |
| 637302 | Apr 25, 2007 | Apr 25, 2007 | EOG Resources, Inc. | Wilson Unit #1HH | 8,400 | 25131714 |
| 636149 | Apr 25, 2007 | Apr 25, 2007 | XTO Energy Inc. | Williams Smith Unit #B 1HH | 11,000 | 25131713 |
| 636149Amendment | Apr 25, 2007 | Apr 25, 2007 | XTO Energy Inc. | Williams Smith Unit #B 1HH | 11,000 | 25131713 |
| 637215 | Apr 23, 2007 | Apr 23, 2007 | EOG Resources, Inc. | Little Buddy Unit #10HH | 8,200 | 25131712 |
| 637196 | Apr 20, 2007 | Apr 20, 2007 | Devon Energy Production Co, L.P. | Circle R Partnership #11HH | 9,000 | 25131711 |
| 637194 | Apr 20, 2007 | Apr 20, 2007 | Devon Energy Production Co, L.P. | Circle R Partnership #10HH | 9,000 | 25131710 |
| 637102 | Apr 19, 2007 | Apr 19, 2007 | Devon Energy Production Co, L.P. | John Edward King #8HH | 9,000 | 25131701 |
| 637094 | Apr 18, 2007 | Apr 18, 2007 | Devon Energy Production Co, L.P. | King, John Edward #6HH | 9,000 | 25131700 |
| 637080 | Apr 18, 2007 | Apr 18, 2007 | Devon Energy Production Co, L.P. | Guthrie, Thomas #8HH | 9,000 | 25131699 |
| 637076 | Apr 18, 2007 | Apr 18, 2007 | Devon Energy Production Co, L.P. | Guthrie, Thomas #7HH | 9,000 | 25131698 |
| 637026 | Apr 18, 2007 | Apr 18, 2007 | XTO Energy Inc. | Roof #4HH | 11,000 | 25131694 |
| 637026Amendment | Apr 18, 2007 | Apr 18, 2007 | XTO Energy Inc. | Roof #4HH | 10,000 | 25131694 |
| 637041 | Apr 17, 2007 | Apr 17, 2007 | EOG Resources, Inc. | Fowler Unit #6 | 8,500 | 25131696 |
| 637039 | Apr 17, 2007 | Apr 17, 2007 | EOG Resources, Inc. | Youngblood Unit #2HH | 7,500 | 25131697 |
| 637000 | Apr 17, 2007 | Apr 17, 2007 | EOG Resources, Inc. | City of Godley Unit #2HH | 7,000 | 25131693 |
| 636935 | Apr 17, 2007 | Apr 17, 2007 | Chesapeake Operating, Inc. | Buchanan #5HH | 9,000 | 25131692 |
| 636933 | Apr 17, 2007 | Apr 17, 2007 | Chesapeake Operating, Inc. | Buchanan #2HH | 9,000 | 25131695 |
| 636933Amendment | Apr 17, 2007 | Apr 17, 2007 | Chesapeake Operating, Inc. | Buchanan #2HH | 9,000 | 25131695 |
| 635722 | Apr 16, 2007 | Apr 16, 2007 | EOG Resources, Inc. | King #13HH | 7,000 | 25131688 |
| 635720 | Apr 16, 2007 | Apr 16, 2007 | EOG Resources, Inc. | King #12HH | 7,000 | 25131687 |
| 635720Amendment | Apr 16, 2007 | Apr 16, 2007 | EOG Resources, Inc. | King #12HH | 10,000 | 25131687 |
| 635719 | Apr 16, 2007 | Apr 16, 2007 | EOG Resources, Inc. | King #10HH | 7,000 | 25131686 |
| 636923 | Apr 14, 2007 | Apr 14, 2007 | Devon Energy Production Co, L.P. | West, Ronald Lynn "A" #1HH | 9,000 | 25131691 |
| 636919 | Apr 14, 2007 | Apr 14, 2007 | Chesapeake Operating, Inc. | Walls Trust #2HH | 9,000 | 25131689 |
| 636917 | Apr 14, 2007 | Apr 14, 2007 | Chesapeake Operating, Inc. | Walls Trust #1HH | 9,000 | 25131690 |
| 636813 | Apr 14, 2007 | Apr 14, 2007 | Chesapeake Operating, Inc. | McNeill #3HH | 9,000 | 25131685 |
| 636796 | Apr 14, 2007 | Apr 14, 2007 | XTO Energy Inc. | Jane Marshall B Unit #2HH | 12,000 | 25131684 |
| 636796Amendment | Apr 14, 2007 | Apr 14, 2007 | XTO Energy Inc. | Jane Marshall B Unit #2HH | 12,000 | 25131684 |
| 636777 | Apr 14, 2007 | Apr 14, 2007 | XTO Energy Inc. | Atwood #C 1HH | 11,000 | 25131683 |
| 636748 | Apr 14, 2007 | Apr 14, 2007 | XTO Energy Inc. | Atwood #B 1HH | 11,000 | 25131682 |
| 636478 | Apr 14, 2007 | Apr 14, 2007 | Chesapeake Operating, Inc. | Dickeson A #4HH | 9,000 | 25131678 |
| 636382 | Apr 14, 2007 | Apr 14, 2007 | Chesapeake Operating, Inc. | Mann, S. #11HH | 9,000 | 25131673 |
| 636379 | Apr 14, 2007 | Apr 14, 2007 | Chesapeake Operating, Inc. | Mann, S. #8HH | 9,000 | 25131672 |
| 636599 | Apr 13, 2007 | Apr 13, 2007 | Chesapeake Operating, Inc. | Randolph #1HH | 9,000 | 25131681 |
| 636599Amendment | Apr 13, 2007 | Apr 13, 2007 | Chesapeake Operating, Inc. | Randolph #1HH | 9,000 | 25131681 |
| 636374 | Apr 13, 2007 | Apr 13, 2007 | Chesapeake Operating, Inc. | Mann, S. #6HH | 9,000 | 25131671 |
| 636241 | Apr 13, 2007 | Apr 13, 2007 | XTO Energy Inc. | Jackson Jerry Unit #1HH | 11,500 | 25131659 |
| 636241Amendment | Apr 13, 2007 | Apr 13, 2007 | XTO Energy Inc. | Jackson Jerry Unit #2HH | 11,500 | 25131659 |
| 636241Amendment | Apr 13, 2007 | Apr 13, 2007 | XTO Energy Inc. | Jackson Jerry Unit #2HH | 10,500 | 25131659 |
| 636515 | Apr 12, 2007 | Apr 12, 2007 | Devon Energy Production Co, L.P. | King, John Edward #4HH | 9,000 | 25131680 |
| 636509 | Apr 12, 2007 | Apr 12, 2007 | Devon Energy Production Co, L.P. | King, John Edward #2HH | 9,000 | 25131679 |
| 636475 | Apr 12, 2007 | Apr 12, 2007 | Devon Energy Production Co, L.P. | Mairead Hand #1H | 9,000 | 25131676 |
| 636476 | Apr 11, 2007 | Apr 11, 2007 | XTO Energy Inc. | Riley Unit #2HH | 12,000 | 25131677 |
| 636476Amendment | Apr 11, 2007 | Apr 11, 2007 | XTO Energy Inc. | Riley Unit #2HH | 11,000 | 25131677 |
| 635674 | Apr 11, 2007 | Apr 11, 2007 | XTO Energy Inc. | Neal #4HH | 11,000 | 25131650 |
| 635674Amendment | Apr 11, 2007 | Apr 11, 2007 | XTO Energy Inc. | Neal #4HH | 11,000 | 25131650 |
| 635674Amendment | Apr 11, 2007 | Apr 11, 2007 | XTO Energy Inc. | Neal #4HH | 11,000 | 25131650 |
| 636605 | Apr 10, 2007 | Apr 10, 2007 | Sullivan, Hollis R. Inc. | Tubbs #2HH | 8,900 | 25131675 |
| 636405 | Apr 10, 2007 | Apr 10, 2007 | Devon Energy Production Co, L.P. | Isbell, Alton #1HH | 9,000 | 25131674 |
| 636367 | Apr 10, 2007 | Apr 10, 2007 | Williams Prod. Gulf Coast, L.P. | Cleveland #1HH | 6,500 | 25131670 |
| 636367Amendment | Apr 10, 2007 | Apr 10, 2007 | Williams Prod. Gulf Coast, L.P. | Cleveland #1HH | 6,600 | 25131670 |
| 634971 | Apr 10, 2007 | Apr 10, 2007 | EOG Resources, Inc. | J. C. Bell Estate Unit #6HH | 7,000 | 25131657 |
| 634971Amendment | Apr 10, 2007 | Apr 10, 2007 | EOG Resources, Inc. | J. C. Bell Estate Unit #6HH | 10,000 | 25131657 |
| 634966 | Apr 10, 2007 | Apr 10, 2007 | EOG Resources, Inc. | J. C. Bell Estate Unit #5HH | 7,000 | 25131655 |
| 634963 | Apr 10, 2007 | Apr 10, 2007 | EOG Resources, Inc. | J. C. Bell Estate Unit #4HH | 7,000 | 25131656 |
| 636337 | Apr 9, 2007 | Apr 9, 2007 | Sullivan, Hollis R. Inc. | Jimenez #2HH | 8,900 | 25131669 |
| 636273 | Apr 9, 2007 | Apr 9, 2007 | Chesapeake Operating, Inc. | McNeill #4HH | 9,000 | 25131664 |
| 636271 | Apr 9, 2007 | Apr 9, 2007 | Chesapeake Operating, Inc. | McNeill #2HH | 9,000 | 25131662 |
| 636267 | Apr 9, 2007 | Apr 9, 2007 | Chesapeake Operating, Inc. | McNeill #1HH | 9,000 | 25131661 |
| 636267Amendment | Apr 9, 2007 | Apr 9, 2007 | Chesapeake Operating, Inc. | McNeill #1HH | 9,000 | 25131661 |
| 636299 | Apr 6, 2007 | Apr 6, 2007 | Chesapeake Operating, Inc. | Mayfly Emerger #7HH | 9,000 | 25131668 |
| 636280 | Apr 6, 2007 | Apr 6, 2007 | Devon Energy Production Co, L.P. | Little Place #5HH | 9,000 | 25131666 |
| 636278 | Apr 6, 2007 | Apr 6, 2007 | Devon Energy Production Co, L.P. | Little Place #4HH | 9,000 | 25131667 |
| 636278Amendment | Apr 6, 2007 | Apr 6, 2007 | Devon Energy Production Co, L.P. | Little Place #4HH | 9,000 | 25131667 |
| 636277 | Apr 6, 2007 | Apr 6, 2007 | Devon Energy Production Co, L.P. | Little Place #3HH | 9,000 | 25131665 |
| 636277Amendment | Apr 6, 2007 | Apr 6, 2007 | Devon Energy Production Co, L.P. | Little Place #3HH | 9,000 | 25131665 |
| 636272 | Apr 6, 2007 | Apr 6, 2007 | Devon Energy Production Co, L.P. | Little Place #2HH | 9,000 | 25131663 |
| 636262 | Apr 5, 2007 | Apr 5, 2007 | Burlington Resources O & G Co LP | Georges Creek Ranch #22HH | 9,000 | 25131660 |
| 636224 | Apr 5, 2007 | Apr 5, 2007 | Burlington Resources O & G Co LP | Georges Creek Ranch #20HH | 9,000 | 25131658 |
| 636072 | Apr 4, 2007 | Apr 4, 2007 | Williams Prod. Gulf Coast, L.P. | Poston #1HH | 6,500 | 25131654 |
| 636072Amendment | Apr 4, 2007 | Apr 4, 2007 | Spindletop Oil & Gas Company | Poston #1 | 6,754 | 25131654 |
| 636056 | Apr 3, 2007 | Apr 3, 2007 | Devon Energy Production Co, L.P. | Rive Enterprises #3HH | 9,000 | 25131653 |
| 636051 | Apr 3, 2007 | Apr 3, 2007 | Devon Energy Production Co, L.P. | Rive Enterprises #1HH | 9,000 | 25131652 |
| 636039 | Apr 2, 2007 | Apr 2, 2007 | EOG Resources, Inc. | Fowler Unit #5HH | 8,500 | 25131651 |
| 635912 | Apr 2, 2007 | Apr 2, 2007 | Chesapeake Operating, Inc. | Panchasarp #2HH | 9,000 | 25131649 |
| 635912Amendment | Apr 2, 2007 | Apr 2, 2007 | Chesapeake Operating, Inc. | Panchasarp #2HH | 9,000 | 25131649 |
| 635908 | Apr 2, 2007 | Apr 2, 2007 | Chesapeake Operating, Inc. | Lail #1HH | 9,000 | 25131648 |
| 634574 | Apr 2, 2007 | Apr 2, 2007 | EOG Resources, Inc. | King #7HH | 7,000 | 25131647 |
| 634572 | Apr 2, 2007 | Apr 2, 2007 | EOG Resources, Inc. | King #6HH | 7,000 | 25131646 |
| 634572Amendment | Apr 2, 2007 | Apr 2, 2007 | EOG Resources, Inc. | King #6HH | 7,000 | 25131646 |
| 635871 | Mar 30, 2007 | Mar 30, 2007 | EOG Resources, Inc. | Ezell Unit #5HH | 8,500 | 25131645 |
| 635870 | Mar 30, 2007 | Mar 30, 2007 | EOG Resources, Inc. | Ezell Unit #4HH | 8,500 | 25131644 |
| 635870Amendment | Mar 30, 2007 | Mar 30, 2007 | EOG Resources, Inc. | Ezell Unit #4HH | 8,500 | 25131644 |
| 635870Amendment | Mar 30, 2007 | Mar 30, 2007 | EOG Resources, Inc. | Ezell Unit #4HH | 10,000 | 25131644 |
| 635854 | Mar 30, 2007 | Mar 30, 2007 | Encana Oil & Gas(usa) Inc. | Dimock #2HH | 9,000 | 25131643 |
| 635851 | Mar 30, 2007 | Mar 30, 2007 | Encana Oil & Gas(usa) Inc. | Dimock #1HH | 9,000 | 25131642 |
| 635848 | Mar 30, 2007 | Mar 30, 2007 | XTO Energy Inc. | Yarbrough Hendricks #1HH | 11,000 | 25131641 |
| 635848Amendment | Mar 30, 2007 | Mar 30, 2007 | XTO Energy Inc. | Yarbrough Hendricks #1HH | 9,000 | 25131641 |