| 617204 | Apr 7, 2006 | Apr 7, 2006 | Chesapeake Operating, Inc. | Cart Barn #1HH | 9,000 | 25130910 |
| 617204Amendment | Apr 7, 2006 | Apr 7, 2006 | Chesapeake Operating, Inc. | Cart Barn #1HH | 9,000 | 25130910 |
| 617188 | Apr 7, 2006 | Apr 7, 2006 | Chesapeake Operating, Inc. | Buffalo Ridge #7HH | 9,000 | 25130908 |
| 617177 | Apr 6, 2006 | Apr 6, 2006 | Williams Prod. Gulf Coast, L.P. | Sledge Sisters #1HH | 8,200 | 25130907 |
| 617133 | Apr 6, 2006 | Apr 6, 2006 | Richey, Ray Management Co., Inc. | Paradise Park #1HH | 11,000 | 25130906 |
| 617127 | Apr 6, 2006 | Apr 6, 2006 | Devon Energy Production Co, L.P. | Bennett, Donald #1H | 9,000 | 25130905 |
| 617076 | Apr 5, 2006 | Apr 5, 2006 | Chesapeake Operating, Inc. | Southlake #3HH | 12,000 | 25130902 |
| 617076Amendment | Apr 5, 2006 | Apr 5, 2006 | Chesapeake Operating, Inc. | Southlake #3HH | 9,000 | 25130902 |
| 617005 | Apr 5, 2006 | Apr 5, 2006 | Chesapeake Operating, Inc. | Buffalo Ridge #5HH | 9,000 | 25130900 |
| 616797 | Apr 5, 2006 | Apr 5, 2006 | Winston Land & Cattle I, Ltd. | Johnson Salty SWD III #3 | 12,000 | 25130897 |
| 616965 | Apr 4, 2006 | Apr 4, 2006 | Aspect Energy, LLC | Klondike Ranch #1HH | 7,700 | 25130899 |
| 616930 | Apr 4, 2006 | Apr 4, 2006 | EOG Resources, Inc. | U.S. Lime #6HH | 6,500 | 25130898 |
| 616796 | Apr 4, 2006 | Apr 4, 2006 | EOG Resources, Inc. | Wolfe #1HH | 7,500 | 25130896 |
| 616796Amendment | Apr 4, 2006 | Apr 4, 2006 | EOG Resources, Inc. | Wolfe Unit #1HH | 7,500 | 25130896 |
| 616788 | Apr 4, 2006 | Apr 4, 2006 | Winston Land & Cattle I, Ltd. | Johnson Salty SWD II #2 | 12,000 | 25130895 |
| 616205 | Apr 4, 2006 | Apr 4, 2006 | Western Assets Management, Inc. | G-2622 "A" #2 | 8,999 | 25130860 |
| 616205Amendment | Apr 4, 2006 | Apr 4, 2006 | Geo Logic Environmental Srvcs LC | Pent #1 | 8,999 | 25130860 |
| 616883 | Apr 3, 2006 | Apr 3, 2006 | XTO Energy Inc. | Kimbrough Dunlap #4HH | 12,000 | 25130894 |
| 616882 | Apr 3, 2006 | Apr 3, 2006 | XTO Energy Inc. | Harper Cattle #B 16AHH | 12,000 | 25130893 |
| 616882Amendment | Apr 3, 2006 | Apr 3, 2006 | XTO Energy Inc. | Harper Cattle #B 16HH | 12,000 | 25130893 |
| 616882Amendment | Apr 3, 2006 | Apr 3, 2006 | XTO Energy Inc. | Harper Cattle #B 16AHH | 12,000 | 25130893 |
| 616881 | Apr 3, 2006 | Apr 3, 2006 | XTO Energy Inc. | Harper Cattle #B 9HH | 12,000 | 25130892 |
| 616832 | Apr 3, 2006 | Apr 3, 2006 | Devon Energy Production Co, L.P. | Calvin Fincher #1H | 9,000 | 25130890 |
| 616429 | Apr 3, 2006 | Apr 3, 2006 | Encana Oil & Gas(usa) Inc. | Classic Oaks Unit #1HH | 9,000 | 25130876 |
| 616855 | Mar 31, 2006 | Mar 31, 2006 | XTO Energy Inc. | Weatherby Unit #1HH | 13,000 | 25130891 |
| 616855Amendment | Mar 31, 2006 | Mar 31, 2006 | XTO Energy Inc. | Weatherby Unit #1HH | 13,000 | 25130891 |
| 616841 | Mar 31, 2006 | Mar 31, 2006 | Devon Energy Production Co, L.P. | Barker-Simpson #1H | 9,000 | 25130889 |
| 616800 | Mar 31, 2006 | Mar 31, 2006 | Chesapeake Operating, Inc. | North Fork #1HH | 9,000 | 25130888 |
| 616789 | Mar 31, 2006 | Mar 31, 2006 | Devon Energy Production Co, L.P. | Pitts, Charles #1H | 9,000 | 25130887 |
| 616756 | Mar 30, 2006 | Mar 30, 2006 | Tsar Operating Company | Mustang Creek #7HH | 10,600 | 25130886 |
| 616756Amendment | Mar 30, 2006 | Mar 30, 2006 | Tsar Operating Company | Mustang Creek Unit B #7HH | 10,600 | 25130886 |
| 616737 | Mar 30, 2006 | Mar 30, 2006 | Joint Resources Company | Huffman #1HH | 8,000 | 25130885 |
| 616736 | Mar 30, 2006 | Mar 30, 2006 | Joint Resources Company | Huffman #2HH | 8,000 | 25130884 |
| 616736Amendment | Mar 30, 2006 | Mar 30, 2006 | Joint Resources Company | Huffman #2HH | 8,500 | 25130884 |
| 616705 | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Harper Cattle #B 7AHH | 11,000 | 25130883 |
| 616701 | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Roof #1HH | 11,000 | 25130881 |
| 616701Amendment | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Roof #1HH | 11,000 | 25130881 |
| 616682 | Mar 30, 2006 | Mar 30, 2006 | Chesapeake Operating, Inc. | Pennington #3HH | 9,000 | 25130880 |
| 614870 | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Harper Cattle #B 6HH | 11,000 | 25130882 |
| 616544 | Mar 29, 2006 | Mar 29, 2006 | EOG Resources, Inc. | E.D. Matlock Estate Unit #1HH | 7,000 | 25130879 |
| 616544Amendment | Mar 29, 2006 | Mar 29, 2006 | EOG Resources, Inc. | E. D. Matlock Estate Unit #1HH | 7,000 | 25130879 |
| 616433 | Mar 29, 2006 | Mar 29, 2006 | EOG Resources, Inc. | Holmes Unit #2HH | 7,000 | 25130878 |
| 616433Amendment | Mar 29, 2006 | Mar 29, 2006 | EOG Resources, Inc. | Holmes Unit #2HH | 7,000 | 25130878 |
| 616433Amendment | Mar 29, 2006 | Mar 29, 2006 | EOG Resources, Inc. | Holmes Unit #2HH | 7,000 | 25130878 |
| 616433Amendment | Mar 29, 2006 | Mar 29, 2006 | EOG Resources, Inc. | Holmes Unit #2HH | 7,500 | 25130878 |
| 616430 | Mar 29, 2006 | Mar 29, 2006 | EOG Resources, Inc. | Holmes Unit #1HH | 7,000 | 25130877 |
| 616430Amendment | Mar 29, 2006 | Mar 29, 2006 | EOG Resources, Inc. | Holmes Unit #1HH | 7,000 | 25130877 |
| 616430Amendment | Mar 29, 2006 | Mar 29, 2006 | EOG Resources, Inc. | Holmes Unit #1HH | 7,500 | 25130877 |
| 616300 | Mar 28, 2006 | Mar 28, 2006 | EOG Resources, Inc. | Willingham Unit #1HH | 7,000 | 25130871 |
| 616300Amendment | Mar 28, 2006 | Mar 28, 2006 | EOG Resources, Inc. | Willingham Unit #1HH | 7,000 | 25130871 |
| 616499 | Mar 27, 2006 | Mar 27, 2006 | Chesapeake Operating, Inc. | Stainless Steel Midge #3HH | 9,000 | 25130875 |
| 616457 | Mar 27, 2006 | Mar 27, 2006 | XTO Energy Inc. | Harper Cattle #B 12HH | 11,000 | 25130874 |
| 616457Amendment | Mar 27, 2006 | Mar 27, 2006 | XTO Energy Inc. | Harper Cattle #B 12HH | 11,000 | 25130874 |
| 616457Amendment | Mar 27, 2006 | Mar 27, 2006 | XTO Energy Inc. | Harper Cattle #B 12AHH | 11,000 | 25130874 |
| 616457Amendment | Mar 27, 2006 | Mar 27, 2006 | XTO Energy Inc. | Harper Cattle #B 12AHH | 11,000 | 25130874 |
| 616443 | Mar 27, 2006 | Mar 27, 2006 | Chesapeake Operating, Inc. | Falvel #7HH | 9,000 | 25130873 |
| 616427 | Mar 27, 2006 | Mar 27, 2006 | Chesapeake Operating, Inc. | Brown, E. #2HH | 9,000 | 25130870 |
| 616066 | Mar 27, 2006 | Mar 27, 2006 | Sundance Resources, Inc. | Woods #1HH | 7,500 | 25130859 |
| 616434 | Mar 24, 2006 | Mar 24, 2006 | Chesapeake Operating, Inc. | Lightfoot #3HH | 9,000 | 25130872 |
| 616397 | Mar 24, 2006 | Mar 24, 2006 | North Texas Llano Operating Corp | Cook Hills #1HH | 8,900 | 25130869 |
| 616384 | Mar 24, 2006 | Mar 24, 2006 | EOG Resources, Inc. | Eagle Ford "a" Unit #3HH | 8,900 | 25130868 |
| 616384Amendment | Mar 24, 2006 | Mar 24, 2006 | EOG Resources, Inc. | Eagle Ford "a" Unit #3HH | 8,900 | 25130868 |
| 616383 | Mar 24, 2006 | Mar 24, 2006 | Devon Energy Production Co, L.P. | William Howard #1H | 9,000 | 25130867 |
| 616375 | Mar 24, 2006 | Mar 24, 2006 | Devon Energy Production Co, L.P. | Monty Miller #1H | 9,000 | 25130866 |
| 616368 | Mar 24, 2006 | Mar 24, 2006 | EOG Resources, Inc. | Eagle Ford "a" Unit #2HH | 8,900 | 25130865 |
| 616368Amendment | Mar 24, 2006 | Mar 24, 2006 | EOG Resources, Inc. | Eagle Ford "a" Unit #2HH | 8,900 | 25130865 |
| 616298 | Mar 23, 2006 | Mar 23, 2006 | Chesapeake Operating, Inc. | Smith Ranch #3HH | 9,000 | 25130863 |
| 616297 | Mar 23, 2006 | Mar 23, 2006 | Chesapeake Operating, Inc. | Smith Ranch #2HH | 9,000 | 25130864 |
| 616246 | Mar 23, 2006 | Mar 23, 2006 | Chesapeake Operating, Inc. | Smith Ranch #1HH | 9,000 | 25130862 |
| 616012 | Mar 23, 2006 | Mar 23, 2006 | EOG Resources, Inc. | Pressley Unit #2HH | 8,500 | 25130857 |
| 615926 | Mar 23, 2006 | Mar 23, 2006 | Encana Oil & Gas(usa) Inc. | Brockette Unit A #1HH | 9,000 | 25130851 |
| 615926Amendment | Mar 23, 2006 | Mar 23, 2006 | Encana Oil & Gas(usa) Inc. | Brockette Unit A #1HH | 9,000 | 25130851 |
| 616239 | Mar 22, 2006 | Mar 22, 2006 | Chesapeake Operating, Inc. | Cobb #1HH | 9,000 | 25130861 |
| 616239Amendment | Mar 22, 2006 | Mar 22, 2006 | Chesapeake Operating, Inc. | Cobb #1HH | 9,000 | 25130861 |
| 615701 | Mar 21, 2006 | Mar 21, 2006 | XTO Energy Inc. | Kimbrough Dunlap #3HH | 11,000 | 25130858 |
| 614950 | Mar 21, 2006 | Mar 21, 2006 | XTO Energy Inc. | Morris #1HH | 11,000 | 25130819 |
| 614950Amendment | Mar 21, 2006 | Mar 21, 2006 | XTO Energy Inc. | Morris Foust Unit #1HH | 11,000 | 25130819 |
| 614950Amendment | Mar 21, 2006 | Mar 21, 2006 | XTO Energy Inc. | Morris Foust Unit #1HH | 11,000 | 25130819 |
| 616080 | Mar 20, 2006 | Mar 20, 2006 | Hanvey, Don H. Oil Interests Inc | CL Smith #1H | 8,500 | 25130856 |
| 616080Amendment | Mar 20, 2006 | Mar 20, 2006 | Hanvey, Don H. Oil Interests Inc | C.L. Smith #1H | 8,500 | 25130856 |
| 616080Amendment | Mar 20, 2006 | Mar 20, 2006 | Hanvey, Don H. Oil Interests Inc | C.L. Smith #1H | 8,500 | 25130856 |
| 615805 | Mar 20, 2006 | Mar 20, 2006 | EOG Resources, Inc. | Railhead Unit #2HH | 7,000 | 25130845 |
| 615805Amendment | Mar 20, 2006 | Mar 20, 2006 | EOG Resources, Inc. | Railhead Unit #2HH | 7,000 | 25130845 |
| 615777 | Mar 20, 2006 | Mar 20, 2006 | EOG Resources, Inc. | Moss #1HH | 8,000 | 25130844 |
| 615991 | Mar 17, 2006 | Mar 17, 2006 | Devon Energy Production Co, L.P. | Karen Brock #1 | 9,000 | 25130855 |
| 615988 | Mar 17, 2006 | Mar 17, 2006 | Devon Energy Production Co, L.P. | Frances Sherrod #1H | 9,000 | 25130854 |
| 615977 | Mar 17, 2006 | Mar 17, 2006 | Chesapeake Operating, Inc. | Stainless Steel Midge #2HH | 9,000 | 25130853 |
| 615959 | Mar 16, 2006 | Mar 16, 2006 | XTO Energy Inc. | Hobson McCoy Young Unit #1HH | 10,000 | 25130852 |
| 615932 | Mar 16, 2006 | Mar 16, 2006 | Devon Energy Production Co, L.P. | Atkins, E. L. #1H | 9,000 | 25130850 |
| 615929 | Mar 16, 2006 | Mar 16, 2006 | Devon Energy Production Co, L.P. | Little Place #1H | 9,000 | 25130849 |
| 615929Amendment | Mar 16, 2006 | Mar 16, 2006 | Devon Energy Production Co, L.P. | Little Place #1H | 9,000 | 25130849 |
| 615901 | Mar 15, 2006 | Mar 15, 2006 | Chesapeake Operating, Inc. | Southlake #2HH | 9,000 | 25130848 |
| 615900 | Mar 15, 2006 | Mar 15, 2006 | Devon Energy Production Co, L.P. | LBR Family Partnership #1H | 9,000 | 25130847 |
| 615895 | Mar 15, 2006 | Mar 15, 2006 | Chief Oil & Gas LLC ** | Brazos Point #1HH | 8,900 | 25130846 |
| 615536 | Mar 15, 2006 | Mar 15, 2006 | EOG Resources, Inc. | Schultz B Unit #1HH | 7,000 | 25130836 |
| 615536Amendment | Mar 15, 2006 | Mar 15, 2006 | EOG Resources, Inc. | Schultz B Unit #1HH | 7,000 | 25130836 |
| 615366 | Mar 15, 2006 | Mar 15, 2006 | EOG Resources, Inc. | Ferguson Foundation SWD #1 | 13,500 | 25130834 |
| 615366Amendment | Mar 15, 2006 | Mar 15, 2006 | EOG Resources, Inc. | Ferguson Foundation SWD #1 | 13,500 | 25130834 |
| 615810 | Mar 14, 2006 | Mar 14, 2006 | Chesapeake Operating, Inc. | Mize Family #22HH | 9,000 | 25130843 |
| 615778 | Mar 14, 2006 | Mar 14, 2006 | Tsar Operating Company | Mustang Creek Unit #2HH | 10,600 | 25130842 |