| 625929 | Sep 21, 2006 | Sep 21, 2006 | EOG Resources, Inc. | Bennett Unit #1HH | 7,000 | 25131200 |
| 626249 | Sep 20, 2006 | Sep 20, 2006 | Chesapeake Operating, Inc. | Silver Down Easter A #3HH | 9,000 | 25131203 |
| 626246 | Sep 20, 2006 | Sep 20, 2006 | Chesapeake Operating, Inc. | Silver Down Easter A #1HH | 9,000 | 25131204 |
| 625921 | Sep 20, 2006 | Sep 20, 2006 | EOG Resources, Inc. | Butler Unit #1HH | 8,800 | 25131199 |
| 625921Amendment | Sep 20, 2006 | Sep 20, 2006 | EOG Resources, Inc. | Flores Unit #2HH | 10,000 | 25131199 |
| 626169 | Sep 19, 2006 | Sep 19, 2006 | XTO Energy Inc. | Burnett Carter Unit #1HH | 11,000 | 25131202 |
| 626169Amendment | Sep 19, 2006 | Sep 19, 2006 | XTO Energy Inc. | Burnett Carter Unit #1HH | 11,500 | 25131202 |
| 626071 | Sep 18, 2006 | Sep 18, 2006 | Chesapeake Operating, Inc. | Green Drake Wulff #2HH | 9,000 | 25131197 |
| 566009 | Sep 18, 2006 | Sep 18, 2006 | Ops Group L.P. | Stout #1HH | 7,700 | 25131198 |
| 566009Amendment | Sep 18, 2006 | Sep 18, 2006 | Ops Group Limited | Stout #1HH | 7,952 | 25131198 |
| 625989 | Sep 15, 2006 | Sep 15, 2006 | EOG Resources, Inc. | Heffner Unit #2HH | 8,000 | 25131196 |
| 625971 | Sep 15, 2006 | Sep 15, 2006 | Chesapeake Operating, Inc. | South Dam #2HH | 9,000 | 25131195 |
| 625971Amendment | Sep 15, 2006 | Sep 15, 2006 | Chesapeake Operating, Inc. | South Dam #2HH | 9,000 | 25131195 |
| 625840 | Sep 15, 2006 | Sep 15, 2006 | XTO Energy Inc. | Doyle #1HH | 12,000 | 25131190 |
| 625840Amendment | Sep 15, 2006 | Sep 15, 2006 | XTO Energy Inc. | Doyle #1HH | 12,000 | 25131190 |
| 625924 | Sep 14, 2006 | Sep 14, 2006 | Chesapeake Operating, Inc. | Burleson Lakes #1HH | 9,000 | 25131194 |
| 625924Amendment | Sep 14, 2006 | Sep 14, 2006 | Chesapeake Operating, Inc. | Burleson Lakes #1HH | 9,000 | 25131194 |
| 625898 | Sep 14, 2006 | Sep 14, 2006 | Devon Energy Production Co, L.P. | Tindle, Buford #3H | 9,000 | 25131193 |
| 625804 | Sep 14, 2006 | Sep 14, 2006 | Chesapeake Operating, Inc. | Parnell #13HH | 9,000 | 25131187 |
| 625856 | Sep 13, 2006 | Sep 13, 2006 | Devon Energy Production Co, L.P. | Tindle, Buford #2H | 9,000 | 25131192 |
| 625848 | Sep 13, 2006 | Sep 13, 2006 | XTO Energy Inc. | Hodges Unit #1HH | 12,000 | 25131191 |
| 625848Amendment | Sep 13, 2006 | Sep 13, 2006 | XTO Energy Inc. | J W Hodges Unit #1HH | 12,000 | 25131191 |
| 625848Amendment | Sep 13, 2006 | Sep 13, 2006 | XTO Energy Inc. | J. W. Hodges Unit #1HH | 12,000 | 25131191 |
| 625839 | Sep 13, 2006 | Sep 13, 2006 | XTO Energy Inc. | Kasal Trust Unit #3HH | 12,000 | 25131189 |
| 625839Amendment | Sep 13, 2006 | Sep 13, 2006 | XTO Energy Inc. | Kasal Trust Unit #3HH | 12,000 | 25131189 |
| 625810 | Sep 13, 2006 | Sep 13, 2006 | Devon Energy Production Co, L.P. | Earley-Calahan GU #1HH | 9,000 | 25131188 |
| 625801 | Sep 13, 2006 | Sep 13, 2006 | Chesapeake Operating, Inc. | Parnell #12HH | 9,000 | 25131186 |
| 625762 | Sep 12, 2006 | Sep 12, 2006 | EOG Resources, Inc. | Beckham Unit #1HH | 8,700 | 25131185 |
| 625762Amendment | Sep 12, 2006 | Sep 12, 2006 | EOG Resources, Inc. | Beckham Unit #1HH | 10,000 | 25131185 |
| 625729 | Sep 11, 2006 | Sep 11, 2006 | XTO Energy Inc. | Parker Unit #3HH | 11,000 | 25131184 |
| 625729Amendment | Sep 11, 2006 | Sep 11, 2006 | XTO Energy Inc. | Parker Unit #3HH | 11,000 | 25131184 |
| 625727 | Sep 11, 2006 | Sep 11, 2006 | XTO Energy Inc. | Parker Unit #1HH | 11,000 | 25131183 |
| 625727Amendment | Sep 11, 2006 | Sep 11, 2006 | XTO Energy Inc. | Parker Unit #1HH | 11,000 | 25131183 |
| 625727Amendment | Sep 11, 2006 | Sep 11, 2006 | XTO Energy Inc. | Parker Unit #1HH | 11,000 | 25131183 |
| 625688 | Sep 11, 2006 | Sep 11, 2006 | Aspect Energy, LLC | Graves #1HH | 8,000 | 25131182 |
| 625688Amendment | Sep 11, 2006 | Sep 11, 2006 | Aspect Energy, LLC | Graves #1HH | 8,000 | 25131182 |
| 625486 | Sep 6, 2006 | Sep 6, 2006 | Sullivan, Hollis R. Inc. | Tubbs #1HH | 8,700 | 25131179 |
| 625439 | Sep 6, 2006 | Sep 6, 2006 | EOG Resources, Inc. | Acu Unit #1HH | 7,500 | 25130264 |
| 625439Amendment | Sep 6, 2006 | Sep 6, 2006 | EOG Resources, Inc. | Acu Unit #1HH | 7,500 | 25130264 |
| 625381 | Sep 5, 2006 | Sep 5, 2006 | Chesapeake Operating, Inc. | Parker #2HH | 9,000 | 25131178 |
| 625372 | Sep 5, 2006 | Sep 5, 2006 | Devon Energy Production Co, L.P. | Gary Nickelson #4H | 9,000 | 25131177 |
| 625372Amendment | Sep 5, 2006 | Sep 5, 2006 | Devon Energy Production Co, L.P. | Nickelson, Gary #4H | 9,000 | 25131177 |
| 625332 | Sep 1, 2006 | Sep 1, 2006 | Devon Energy Production Co, L.P. | Gary Nickelson #3H | 9,000 | 25131176 |
| 625332Amendment | Sep 1, 2006 | Sep 1, 2006 | Devon Energy Production Co, L.P. | Nickelson, Gary #3HH | 9,000 | 25131176 |
| 625317 | Aug 31, 2006 | Aug 31, 2006 | Devon Energy Production Co, L.P. | Gary Crabtree #3H | 9,000 | 25131174 |
| 625269 | Aug 31, 2006 | Aug 31, 2006 | Chesapeake Operating, Inc. | Johns Manville #2HH | 9,000 | 25131173 |
| 625230 | Aug 31, 2006 | Aug 31, 2006 | J-W Operating Co. | Gilpin #2HH | 15,000 | 25131170 |
| 625055 | Aug 31, 2006 | Aug 31, 2006 | Range Production Company | Emerson #1HH | 8,500 | 25131169 |
| 625247 | Aug 30, 2006 | Aug 30, 2006 | Devon Energy Production Co, L.P. | Crabtree, Gary #2H | 9,000 | 25131172 |
| 625221 | Aug 30, 2006 | Aug 30, 2006 | Devon Energy Production Co, L.P. | Rawdon, Harold T. #2H | 9,000 | 25131171 |
| 625221Amendment | Aug 30, 2006 | Aug 30, 2006 | Devon Energy Production Co, L.P. | Rawdon, Harold T. #2H | 9,000 | 25131171 |
| 625192 | Aug 30, 2006 | Aug 30, 2006 | Chesapeake Operating, Inc. | Hogan-Lee #1HH | 9,000 | 25131168 |
| 625192Amendment | Aug 30, 2006 | Aug 30, 2006 | Chesapeake Operating, Inc. | Hogan-Lee #1HH | 9,000 | 25131168 |
| 625192Amendment | Aug 30, 2006 | Aug 30, 2006 | Chesapeake Operating, Inc. | Hogan-Lee #1HH | 9,000 | 25131168 |
| 625157 | Aug 29, 2006 | Aug 29, 2006 | Chesapeake Operating, Inc. | River #1HH | 9,000 | 25131167 |
| 625155 | Aug 29, 2006 | Aug 29, 2006 | Chesapeake Operating, Inc. | Jaxson #1HH | 9,000 | 25131166 |
| 625146 | Aug 29, 2006 | Aug 29, 2006 | Chesapeake Operating, Inc. | South Dam #3HH | 9,000 | 25131165 |
| 625102 | Aug 29, 2006 | Aug 29, 2006 | Chesapeake Operating, Inc. | Mayfly Emerger #3HH | 9,000 | 25131164 |
| 625008 | Aug 29, 2006 | Aug 29, 2006 | XTO Energy Inc. | Forston Burton Kirkland #A 1AHH | 12,000 | 25131163 |
| 625008Amendment | Aug 29, 2006 | Aug 29, 2006 | XTO Energy Inc. | Forston Burton Kirkland #A 1AHH | 12,000 | 25131163 |
| 625029 | Aug 28, 2006 | Aug 28, 2006 | XTO Energy Inc. | Jackson, Dale James #C 1HRH | 11,000 | 25130261 |
| 625029Amendment | Aug 28, 2006 | Aug 28, 2006 | XTO Energy Inc. | Jackson, James Dale #C 1HRH | 11,000 | 25130261 |
| 624994 | Aug 28, 2006 | Aug 28, 2006 | Arrington,david H. Oil & Gas,inc | Green Highlander #1HH | 8,500 | 25131162 |
| 624988 | Aug 25, 2006 | Aug 25, 2006 | XTO Energy Inc. | Parker Unit #2HH | 11,000 | 25131161 |
| 624988Amendment | Aug 25, 2006 | Aug 25, 2006 | XTO Energy Inc. | Parker Unit #2HH | 11,000 | 25131161 |
| 624955 | Aug 25, 2006 | Aug 25, 2006 | XTO Energy Inc. | Harper Cattle #C 8HH | 11,500 | 25131160 |
| 624955Amendment | Aug 25, 2006 | Aug 25, 2006 | XTO Energy Inc. | Harper Cattle #C 8HH | 11,500 | 25131160 |
| 624855 | Aug 24, 2006 | Aug 24, 2006 | Chesapeake Operating, Inc. | Mize Family #30HH | 9,000 | 25131159 |
| 624853 | Aug 24, 2006 | Aug 24, 2006 | Chesapeake Operating, Inc. | Mize Family #28HH | 9,000 | 25131158 |
| 624853Amendment | Aug 24, 2006 | Aug 24, 2006 | Chesapeake Operating, Inc. | Mize Family #28HH | 9,000 | 25131158 |
| 624773 | Aug 24, 2006 | Aug 24, 2006 | EOG Resources, Inc. | Clements Unit #7HH | 7,000 | 25131157 |
| 624707 | Aug 24, 2006 | Aug 24, 2006 | EOG Resources, Inc. | Clements Unit #5HH | 7,000 | 25131153 |
| 624691 | Aug 24, 2006 | Aug 24, 2006 | EOG Resources, Inc. | J. C. Bell Estate Unit #1HH | 7,000 | 25131152 |
| 624691Amendment | Aug 24, 2006 | Aug 24, 2006 | EOG Resources, Inc. | J. C. Bell Estate Unit #1HH | 7,000 | 25131152 |
| 624660 | Aug 24, 2006 | Aug 24, 2006 | EOG Resources, Inc. | Heffner Unit #1HH | 8,000 | 25131151 |
| 624660Amendment | Aug 24, 2006 | Aug 24, 2006 | EOG Resources, Inc. | Heffner Unit #1HH | 8,000 | 25131151 |
| 624800 | Aug 23, 2006 | Aug 23, 2006 | Chesapeake Operating, Inc. | South Dam #4HH | 9,000 | 25131156 |
| 624799 | Aug 23, 2006 | Aug 23, 2006 | Devon Energy Production Co, L.P. | Nowlin, Billie Marie #1H | 9,000 | 25131155 |
| 624715 | Aug 23, 2006 | Aug 23, 2006 | Devon Energy Production Co, L.P. | Parnell #2H | 9,000 | 25131154 |
| 624512 | Aug 23, 2006 | Aug 23, 2006 | EOG Resources, Inc. | Bowerman Unit #3HH | 7,000 | 25131142 |
| 624730 | Aug 22, 2006 | Aug 22, 2006 | Devon Energy Production Co, L.P. | Parnell #4H | 9,000 | 25131150 |
| 624730Amendment | Aug 22, 2006 | Aug 22, 2006 | Devon Energy Production Co, L.P. | Parnell #4H | 9,000 | 25131150 |
| 624726 | Aug 22, 2006 | Aug 22, 2006 | Devon Energy Production Co, L.P. | Parnell #3H | 9,000 | 25131148 |
| 624713 | Aug 21, 2006 | Aug 21, 2006 | XTO Energy Inc. | Jane Marshall C Unit #1HH | 12,000 | 25131147 |
| 624713Amendment | Aug 21, 2006 | Aug 21, 2006 | XTO Energy Inc. | Jane Marshall C Unit #1HH | 12,000 | 25131147 |
| 624713Amendment | Aug 21, 2006 | Aug 21, 2006 | XTO Energy Inc. | Jane Marshall C Unit #1HH | 12,000 | 25131147 |
| 624694 | Aug 21, 2006 | Aug 21, 2006 | Devon Energy Production Co, L.P. | Rose Children's Trust #2H | 9,000 | 25131146 |
| 624656 | Aug 21, 2006 | Aug 21, 2006 | EOG Resources, Inc. | Fowler Unit #1HH | 8,000 | 25131145 |
| 624656Amendment | Aug 21, 2006 | Aug 21, 2006 | EOG Resources, Inc. | Fowler Unit #1HH | 8,000 | 25131145 |
| 624645 | Aug 21, 2006 | Aug 21, 2006 | Chesapeake Operating, Inc. | Wakeland #1HH | 9,000 | 25131144 |
| 624643 | Aug 21, 2006 | Aug 21, 2006 | XTO Energy Inc. | Fortson Burton Kirkland Unit #B 1HH | 12,000 | 25131143 |
| 624341 | Aug 21, 2006 | Aug 21, 2006 | Williams Prod. Gulf Coast, L.P. | Creek Park Unit #3HH | 8,000 | 25131138 |
| 624341Amendment | Aug 21, 2006 | Aug 21, 2006 | Williams Prod. Gulf Coast, L.P. | Creek Park #3HH | 7,600 | 25131138 |
| 624330 | Aug 21, 2006 | Aug 21, 2006 | Williams Prod. Gulf Coast, L.P. | Creek Park Unit #1HH | 8,000 | 25131137 |
| 624529 | Aug 17, 2006 | Aug 17, 2006 | Devon Energy Production Co, L.P. | Ahmet Uysaler #3H | 9,000 | 25131141 |
| 624491 | Aug 17, 2006 | Aug 17, 2006 | Chesapeake Operating, Inc. | Marshall #1HH | 9,000 | 25131140 |
| 624427 | Aug 16, 2006 | Aug 16, 2006 | Chesapeake Operating, Inc. | Silver Down Easter A #4HH | 9,000 | 25131139 |
| 624099 | Aug 16, 2006 | Aug 16, 2006 | EOG Resources, Inc. | C. N. Marsh Unit #5HH | 7,000 | 25131133 |
| 624099Amendment | Aug 16, 2006 | Aug 16, 2006 | EOG Resources, Inc. | C. N. Marsh Unit #5HH | 7,000 | 25131133 |
| 624297 | Aug 14, 2006 | Aug 14, 2006 | Chesapeake Operating, Inc. | North Lake #2HH | 9,000 | 25131136 |