| 641073Amendment | Jul 2, 2007 | Jul 2, 2007 | EOG Resources, Inc. | Maples Unit #4HH | 8,300 | 25131941 |
| 640989 | Jul 2, 2007 | Jul 2, 2007 | Devon Energy Production Co, L.P. | Boyd, Billy #5H | 9,000 | 25131944 |
| 641040 | Jun 29, 2007 | Jun 29, 2007 | EOG Resources, Inc. | Teich, Henry #4HH | 7,800 | 25131939 |
| 641035 | Jun 29, 2007 | Jun 29, 2007 | XTO Energy Inc. | Morris Foust Unit #B 2HH | 12,000 | 25131938 |
| 641035Amendment | Jun 29, 2007 | Jun 29, 2007 | XTO Energy Inc. | Morris Foust Unit #B 2HH | 12,000 | 25131938 |
| 641035Amendment | Jun 29, 2007 | Jun 29, 2007 | XTO Energy Inc. | Morris Foust Unit #B 2HH | 12,000 | 25131938 |
| 641033 | Jun 29, 2007 | Jun 29, 2007 | XTO Energy Inc. | Hadley Unit #B 3HH | 12,000 | 25131937 |
| 641033Amendment | Jun 29, 2007 | Jun 29, 2007 | XTO Energy Inc. | Hadley Unit #B 3HH | 12,000 | 25131937 |
| 641011 | Jun 29, 2007 | Jun 29, 2007 | Devon Energy Production Co, L.P. | Boyd, Billy #6H | 9,000 | 25131936 |
| 640979 | Jun 28, 2007 | Jun 28, 2007 | EOG Resources, Inc. | Hall Unit #3HH | 7,800 | 25131935 |
| 640970 | Jun 28, 2007 | Jun 28, 2007 | Devon Energy Production Co, L.P. | Boyd, Billy #4H | 9,000 | 25131933 |
| 640968 | Jun 28, 2007 | Jun 28, 2007 | Devon Energy Production Co, L.P. | Boyd, Billy #3H | 9,000 | 25131932 |
| 640937 | Jun 28, 2007 | Jun 28, 2007 | Devon Energy Production Co, L.P. | Boyd, Billy #2H | 9,000 | 25131931 |
| 640890 | Jun 28, 2007 | Jun 28, 2007 | Chesapeake Operating, Inc. | Runway #1HH | 12,000 | 25131928 |
| 640858 | Jun 28, 2007 | Jun 28, 2007 | Chesapeake Operating, Inc. | Shaw B #1HH | 12,000 | 25131927 |
| 640858Amendment | Jun 28, 2007 | Jun 28, 2007 | Chesapeake Operating, Inc. | Shaw B #1HH | 9,000 | 25131927 |
| 640851 | Jun 28, 2007 | Jun 28, 2007 | EOG Resources, Inc. | Strange Unit #6HH | 8,400 | 25131926 |
| 640851Amendment | Jun 28, 2007 | Jun 28, 2007 | EOG Resources, Inc. | Strange Unit #6HH | 10,000 | 25131926 |
| 640875 | Jun 27, 2007 | Jun 27, 2007 | North Texas Llano Operating Corp | Brewer #1HH | 9,000 | 25131929 |
| 640844 | Jun 27, 2007 | Jun 27, 2007 | EOG Resources, Inc. | Strange Unit #5HH | 8,300 | 25131925 |
| 640844Amendment | Jun 27, 2007 | Jun 27, 2007 | EOG Resources, Inc. | Strange Unit #5HH | 10,000 | 25131925 |
| 640844Amendment | Jun 27, 2007 | Jun 27, 2007 | EOG Resources, Inc. | Strange Unit #5HH | 10,000 | 25131925 |
| 640842 | Jun 27, 2007 | Jun 27, 2007 | EOG Resources, Inc. | Strange Unit #4HH | 8,300 | 25131924 |
| 640842Amendment | Jun 27, 2007 | Jun 27, 2007 | EOG Resources, Inc. | Strange Unit #4HH | 10,000 | 25131924 |
| 640842Amendment | Jun 27, 2007 | Jun 27, 2007 | EOG Resources, Inc. | Strange Unit #4HH | 10,000 | 25131924 |
| 640834 | Jun 27, 2007 | Jun 27, 2007 | Chesapeake Operating, Inc. | Mackey #3HH | 12,000 | 25131923 |
| 640832 | Jun 27, 2007 | Jun 27, 2007 | Chesapeake Operating, Inc. | Mackey #2HH | 12,000 | 25131922 |
| 640831 | Jun 27, 2007 | Jun 27, 2007 | Chesapeake Operating, Inc. | Mackey #1HH | 12,000 | 25131921 |
| 640786 | Jun 26, 2007 | Jun 26, 2007 | Paloma Resources, LLC | Jeschke Unit #1HH | 9,000 | 25131920 |
| 640775 | Jun 26, 2007 | Jun 26, 2007 | XTO Energy Inc. | Kasal #6HH | 11,000 | 25131919 |
| 640775Amendment | Jun 26, 2007 | Jun 26, 2007 | XTO Energy Inc. | Kasal #6HH | 11,000 | 25131919 |
| 640775Amendment | Jun 26, 2007 | Jun 26, 2007 | XTO Energy Inc. | Kasal #6HH | 11,000 | 25131919 |
| 640730 | Jun 25, 2007 | Jun 25, 2007 | XTO Energy Inc. | Riddle #A 3HH | 10,000 | 25131918 |
| 640730Amendment | Jun 25, 2007 | Jun 25, 2007 | XTO Energy Inc. | Riddle #A 3HH | 10,000 | 25131918 |
| 640719 | Jun 25, 2007 | Jun 25, 2007 | Devon Energy Production Co, L.P. | Boyd, Billy #9H | 9,000 | 25131917 |
| 640716 | Jun 25, 2007 | Jun 25, 2007 | Devon Energy Production Co, L.P. | Circle R Partnership #13HH | 9,000 | 25131916 |
| 640710 | Jun 25, 2007 | Jun 25, 2007 | Devon Energy Production Co, L.P. | McCaffity, Sharon #3HH | 9,000 | 25131915 |
| 640689 | Jun 22, 2007 | Jun 22, 2007 | Devon Energy Production Co, L.P. | Kennon, Alfred #4HH | 9,000 | 25131914 |
| 640685 | Jun 22, 2007 | Jun 22, 2007 | Devon Energy Production Co, L.P. | Kennon, Alfred #2HH | 9,000 | 25131913 |
| 640655 | Jun 22, 2007 | Jun 22, 2007 | Chesapeake Operating, Inc. | Bingham, Ann #3HH | 9,000 | 25131912 |
| 640654 | Jun 22, 2007 | Jun 22, 2007 | Chesapeake Operating, Inc. | Bingham, Ann #2HH | 9,000 | 25131911 |
| 640569 | Jun 21, 2007 | Jun 21, 2007 | Chesapeake Operating, Inc. | Doty #6HH | 12,000 | 25131908 |
| 640567 | Jun 21, 2007 | Jun 21, 2007 | Chesapeake Operating, Inc. | Doty #5HH | 12,000 | 25131909 |
| 640614 | Jun 20, 2007 | Jun 20, 2007 | Devon Energy Production Co, L.P. | Ricky Frazier #6HH | 9,000 | 25131910 |
| 640451 | Jun 20, 2007 | Jun 20, 2007 | Devon Energy Production Co, L.P. | Bransom, Cindy #1HH | 9,000 | 25131906 |
| 639161 | Jun 20, 2007 | Jun 20, 2007 | EOG Resources, Inc. | Hilton Unit #6HH | 9,000 | 25131833 |
| 640423 | Jun 18, 2007 | Jun 18, 2007 | Chesapeake Operating, Inc. | Bingham, Ann #1HH | 12,000 | 25131904 |
| 640453 | Jun 15, 2007 | Jun 15, 2007 | Paloma Resources, LLC | Houston Bryant Unit #1HH | 8,500 | 25131907 |
| 640386 | Jun 15, 2007 | Jun 15, 2007 | Devon Energy Production Co, L.P. | Hill Top Ranch #3HH | 9,000 | 25131903 |
| 640364 | Jun 15, 2007 | Jun 15, 2007 | Chesapeake Operating, Inc. | Doty #4HH | 14,000 | 25131905 |
| 640340 | Jun 15, 2007 | Jun 15, 2007 | Chesapeake Operating, Inc. | Little Hoss #T 4HH | 9,000 | 25133827 |
| 640339 | Jun 15, 2007 | Jun 15, 2007 | Chesapeake Operating, Inc. | Little Hoss #T 3HH | 9,000 | 25131899 |
| 640337 | Jun 15, 2007 | Jun 15, 2007 | Chesapeake Operating, Inc. | Little Hoss #T 1HH | 9,000 | 25131902 |
| 640256 | Jun 14, 2007 | Jun 14, 2007 | Devon Energy Production Co, L.P. | Thomas, Joseph #1HH | 9,000 | 25131898 |
| 640256Amendment | Jun 14, 2007 | Jun 14, 2007 | Devon Energy Production Co, L.P. | Thomas, Joseph #1HH | 9,000 | 25131898 |
| 640256Amendment | Jun 14, 2007 | Jun 14, 2007 | Devon Energy Production Co, L.P. | Thomas, Joseph #1HH | 9,000 | 25131898 |
| 640256Amendment | Jun 14, 2007 | Jun 14, 2007 | Devon Energy Production Co, L.P. | Thomas, Joseph #1HH | 9,000 | 25131898 |
| 640256Amendment | Jun 14, 2007 | Jun 14, 2007 | Devon Energy Production Co, L.P. | Thomas, Joseph #1HH | 9,000 | 25131898 |
| 638121 | Jun 14, 2007 | Jun 14, 2007 | EOG Resources, Inc. | Schell Unit #2HH | 7,500 | 25131767 |
| 640163 | Jun 12, 2007 | Jun 12, 2007 | Chesapeake Operating, Inc. | Manning #6HH | 12,000 | 25131895 |
| 640163Amendment | Jun 12, 2007 | Jun 12, 2007 | Chesapeake Operating, Inc. | Manning #6HH | 12,000 | 25131895 |
| 640161 | Jun 12, 2007 | Jun 12, 2007 | Chesapeake Operating, Inc. | Manning #5HH | 12,000 | 25131894 |
| 640161Amendment | Jun 12, 2007 | Jun 12, 2007 | Chesapeake Operating, Inc. | Manning #5HH | 9,000 | 25131894 |
| 640160 | Jun 12, 2007 | Jun 12, 2007 | Chesapeake Operating, Inc. | Manning #4HH | 12,000 | 25131893 |
| 640160Amendment | Jun 12, 2007 | Jun 12, 2007 | Chesapeake Operating, Inc. | Manning #4HH | 9,000 | 25131893 |
| 640142 | Jun 12, 2007 | Jun 12, 2007 | EOG Resources, Inc. | Little Buddy Unit #9HH | 8,500 | 25131892 |
| 640142Amendment | Jun 12, 2007 | Jun 12, 2007 | EOG Resources, Inc. | Little Buddy Unit #9HH | 10,000 | 25131892 |
| 640122 | Jun 12, 2007 | Jun 12, 2007 | EOG Resources, Inc. | Little Buddy Unit #8HH | 8,100 | 25131891 |
| 639714 | Jun 12, 2007 | Jun 12, 2007 | Chesapeake Operating, Inc. | Eason #3HH | 12,000 | 25131897 |
| 639713 | Jun 12, 2007 | Jun 12, 2007 | Chesapeake Operating, Inc. | Eason #2HH | 12,000 | 25131896 |
| 639712 | Jun 12, 2007 | Jun 12, 2007 | Chesapeake Operating, Inc. | Eason #1HH | 12,000 | 25131876 |
| 639981 | Jun 11, 2007 | Jun 11, 2007 | Chesapeake Operating, Inc. | Stults-Welborn #3HH | 9,000 | 25131890 |
| 639981Amendment | Jun 11, 2007 | Jun 11, 2007 | Chesapeake Operating, Inc. | Stults-Welborn #3HH | 9,000 | 25131890 |
| 639980 | Jun 11, 2007 | Jun 11, 2007 | Chesapeake Operating, Inc. | Stults-Welborn #2HH | 9,000 | 25131889 |
| 639980Amendment | Jun 11, 2007 | Jun 11, 2007 | Chesapeake Operating, Inc. | Stults-Welborn #2HH | 9,000 | 25131889 |
| 639966 | Jun 11, 2007 | Jun 11, 2007 | Williams Prod. Gulf Coast, L.P. | Oak Valley #1HH | 8,000 | 25131888 |
| 639966Amendment | Jun 11, 2007 | Jun 11, 2007 | Williams Prod. Gulf Coast, L.P. | Oak Valley #1HH | 8,000 | 25131888 |
| 639960 | Jun 11, 2007 | Jun 11, 2007 | Sullivan, Hollis R. Inc. | Pearl #1HH | 8,600 | 25131887 |
| 639884 | Jun 7, 2007 | Jun 7, 2007 | Range Production Company | Bartlett Unit #1HH | 9,000 | 25131886 |
| 639858 | Jun 7, 2007 | Jun 7, 2007 | Devon Energy Production Co, L.P. | Bluebird #1HH | 9,000 | 25131884 |
| 639721 | Jun 7, 2007 | Jun 7, 2007 | Chesapeake Operating, Inc. | Young #2HH | 12,000 | 25131879 |
| 638102 | Jun 7, 2007 | Jun 7, 2007 | EOG Resources, Inc. | Milford Investments Unit #2HH | 7,800 | 25131758 |
| 639796 | Jun 6, 2007 | Jun 6, 2007 | EOG Resources, Inc. | U.S. Lime #16HH | 7,800 | 25131883 |
| 639796Amendment | Jun 6, 2007 | Jun 6, 2007 | EOG Resources, Inc. | U.S. Lime Unit C #16HH | 10,000 | 25131883 |
| 639755 | Jun 6, 2007 | Jun 6, 2007 | North Texas Llano Operating Corp | Savage #1H | 9,000 | 25131885 |
| 638116 | Jun 6, 2007 | Jun 6, 2007 | EOG Resources, Inc. | Schell Unit #1HH | 7,500 | 25131764 |
| 639720 | Jun 5, 2007 | Jun 5, 2007 | Chesapeake Operating, Inc. | Young #1HH | 12,000 | 25131878 |
| 632665 | Jun 5, 2007 | Jun 5, 2007 | EOG Resources, Inc. | Jackson Johnson Unit #1HH | 8,500 | 25131474 |
| 632665Amendment | Jun 5, 2007 | Jun 5, 2007 | EOG Resources, Inc. | Fleet Unit #1HH | 8,500 | 25131474 |
| 632665Amendment | Jun 5, 2007 | Jun 5, 2007 | EOG Resources, Inc. | Fleet Unit #1HH | 10,000 | 25131474 |
| 639753 | Jun 4, 2007 | Jun 4, 2007 | XTO Energy Inc. | Wilkinson Unit #4HH | 12,000 | 25133812 |
| 639749 | Jun 4, 2007 | Jun 4, 2007 | XTO Energy Inc. | Wilkinson Unit #3HH | 12,000 | 25131881 |
| 639746 | Jun 4, 2007 | Jun 4, 2007 | XTO Energy Inc. | Wilkinson Unit #2HH | 12,000 | 25131880 |
| 639716 | Jun 4, 2007 | Jun 4, 2007 | Chesapeake Operating, Inc. | Childress #14HH | 12,000 | 25131877 |
| 639716Amendment | Jun 4, 2007 | Jun 4, 2007 | Chesapeake Operating, Inc. | Childress #14HH | 12,000 | 25131877 |
| 639705 | Jun 4, 2007 | Jun 4, 2007 | Chesapeake Operating, Inc. | Flora Walker #4HH | 12,000 | 25131875 |
| 639704 | Jun 1, 2007 | Jun 1, 2007 | Chesapeake Operating, Inc. | Walker, Flora #2HH | 12,000 | 25131874 |
| 639677 | Jun 1, 2007 | Jun 1, 2007 | Chesapeake Operating, Inc. | Terry #3HH | 12,000 | 25131872 |
| 639675 | Jun 1, 2007 | Jun 1, 2007 | Chesapeake Operating, Inc. | Terry #1HH | 12,000 | 25131873 |
| 639644 | Jun 1, 2007 | Jun 1, 2007 | Range Production Company | Turkey Creek #4HH | 9,000 | 25131870 |