| 646207Amendment | Sep 20, 2007 | Sep 20, 2007 | XTO Energy Inc. | Jackson Jerry Unit #B 1HH | 9,150 | 25132232 |
| 646206 | Sep 20, 2007 | Sep 20, 2007 | EOG Resources, Inc. | Double Diamond Unit #10HH | 10,000 | 25132234 |
| 646206Amendment | Sep 20, 2007 | Sep 20, 2007 | EOG Resources, Inc. | Double Diamond Unit #10HH | 10,000 | 25132234 |
| 646171 | Sep 20, 2007 | Sep 20, 2007 | XTO Energy Inc. | Graystone Unit #1HH | 12,000 | 25132231 |
| 646171Amendment | Sep 20, 2007 | Sep 20, 2007 | XTO Energy Inc. | Graystone Unit #1HH | 12,000 | 25132231 |
| 646169 | Sep 20, 2007 | Sep 20, 2007 | XTO Energy Inc. | Kimbrough Dunlap Unit #B 6HH | 13,000 | 25132230 |
| 646169Amendment | Sep 20, 2007 | Sep 20, 2007 | XTO Energy Inc. | Kimbrough Dunlap Unit #B 6HH | 13,000 | 25132230 |
| 646169Amendment | Sep 20, 2007 | Sep 20, 2007 | XTO Energy Inc. | Kimbrough Dunlap Unit #B 6HH | 13,000 | 25132230 |
| 646113 | Sep 19, 2007 | Sep 19, 2007 | XTO Energy Inc. | Txi #A 1HH | 12,500 | 25132229 |
| 646113Amendment | Sep 19, 2007 | Sep 19, 2007 | XTO Energy Inc. | Txi #A 1HH | 12,500 | 25132229 |
| 646050 | Sep 18, 2007 | Sep 18, 2007 | Devon Energy Production Co, L.P. | Cashion, John #1HH | 9,000 | 25132227 |
| 645995 | Sep 18, 2007 | Sep 18, 2007 | EOG Resources, Inc. | Beckham Unit #4HH | 10,000 | 25132222 |
| 645991 | Sep 18, 2007 | Sep 18, 2007 | EOG Resources, Inc. | Beckham Unit #3HH | 10,000 | 25132221 |
| 645982 | Sep 18, 2007 | Sep 18, 2007 | EOG Resources, Inc. | Beckham Unit #2HH | 10,000 | 25132228 |
| 646033 | Sep 17, 2007 | Sep 17, 2007 | Devon Energy Production Co, L.P. | Pitts, Charles #8HH | 9,000 | 25132224 |
| 645952 | Sep 17, 2007 | Sep 17, 2007 | Chesapeake Operating, Inc. | Elvis Culton #1HH | 9,000 | 25132220 |
| 645931 | Sep 14, 2007 | Sep 14, 2007 | Adexco Operating Company | Cresson Estates Unit #2HH | 8,500 | 25132219 |
| 645912 | Sep 14, 2007 | Sep 14, 2007 | Chesapeake Operating, Inc. | Little Hoss 7 #A 4HH | 9,000 | 25132218 |
| 645911 | Sep 14, 2007 | Sep 14, 2007 | Chesapeake Operating, Inc. | Little Hoss 7 #A 3HH | 9,000 | 25132217 |
| 645871 | Sep 14, 2007 | Sep 14, 2007 | Devon Energy Production Co, L.P. | Menchaca, Nicholas #1HH | 9,000 | 25132216 |
| 645858 | Sep 14, 2007 | Sep 14, 2007 | Devon Energy Production Co, L.P. | Richardson, J. C. #1HH | 9,000 | 25132215 |
| 645858Amendment | Sep 14, 2007 | Sep 14, 2007 | Devon Energy Production Co, L.P. | Richardson, J. C. #1HH | 9,000 | 25132215 |
| 645841 | Sep 14, 2007 | Sep 14, 2007 | EOG Resources, Inc. | U.S. Lime #19HH | 10,000 | 25132226 |
| 645837 | Sep 14, 2007 | Sep 14, 2007 | EOG Resources, Inc. | U.S. Lime #18HH | 10,000 | 25132225 |
| 645833 | Sep 14, 2007 | Sep 14, 2007 | EOG Resources, Inc. | U.S. Lime #17HH | 10,000 | 25132214 |
| 645690 | Sep 13, 2007 | Sep 13, 2007 | Chesapeake Operating, Inc. | S Mann #17HH | 9,000 | 25132210 |
| 645689 | Sep 13, 2007 | Sep 13, 2007 | Chesapeake Operating, Inc. | S Mann #14HH | 9,000 | 25132209 |
| 645688 | Sep 13, 2007 | Sep 13, 2007 | Chesapeake Operating, Inc. | S Mann #10HH | 9,000 | 25132207 |
| 645688Amendment | Sep 13, 2007 | Sep 13, 2007 | Chesapeake Operating, Inc. | S Mann #10HH | 9,000 | 25132207 |
| 645686 | Sep 13, 2007 | Sep 13, 2007 | Chesapeake Operating, Inc. | S Mann #4HH | 9,000 | 25132208 |
| 645748 | Sep 12, 2007 | Sep 12, 2007 | EOG Resources, Inc. | Barron Unit #9HH | 10,000 | 25132213 |
| 645748Amendment | Sep 12, 2007 | Sep 12, 2007 | EOG Resources, Inc. | Barron Unit #9HH | 10,000 | 25132213 |
| 645743 | Sep 12, 2007 | Sep 12, 2007 | EOG Resources, Inc. | Barron Unit #8HH | 10,000 | 25132212 |
| 645743Amendment | Sep 12, 2007 | Sep 12, 2007 | EOG Resources, Inc. | Barron Unit #8HH | 10,000 | 25132212 |
| 645733 | Sep 12, 2007 | Sep 12, 2007 | Chesapeake Operating, Inc. | Sutton #1HH | 9,000 | 25132211 |
| 641917 | Sep 7, 2007 | Sep 7, 2007 | XTO Energy Inc. | Forston Burton Kirkland Unit #A 2HH | 12,000 | 25131999 |
| 634574Amendment | Sep 7, 2007 | Sep 7, 2007 | EOG Resources, Inc. | King #7HH | 7,000 | 25131647 |
| 645525 | Sep 6, 2007 | Sep 6, 2007 | EOG Resources, Inc. | Clark Unit #4HH | 10,000 | 25132206 |
| 645525Amendment | Sep 6, 2007 | Sep 6, 2007 | EOG Resources, Inc. | Clark Unit #4HH | 10,000 | 25132206 |
| 645522 | Sep 6, 2007 | Sep 6, 2007 | Paloma Resources, LLC | Willow Creek 'B' Unit #1HH | 9,000 | 25132205 |
| 645462 | Sep 6, 2007 | Sep 6, 2007 | Paloma Resources, LLC | Martin Unit #2HH | 9,000 | 25132203 |
| 645455 | Sep 5, 2007 | Sep 5, 2007 | Arrington,david H. Oil & Gas,inc | Blue Goose #1HH | 8,800 | 25132202 |
| 636382Amendment | Sep 5, 2007 | Sep 5, 2007 | Chesapeake Operating, Inc. | Mann, S. #11HH | 9,000 | 25131673 |
| 636379Amendment | Sep 5, 2007 | Sep 5, 2007 | Chesapeake Operating, Inc. | Mann, S. #8HH | 9,000 | 25131672 |
| 645218 | Sep 4, 2007 | Sep 4, 2007 | Williams Prod. Gulf Coast, L.P. | Collins A #3HH | 7,485 | 25132193 |
| 645296 | Aug 31, 2007 | Aug 31, 2007 | EOG Resources, Inc. | Martin Unit #5HH | 10,000 | 25132199 |
| 645296Amendment | Aug 31, 2007 | Aug 31, 2007 | EOG Resources, Inc. | Martin Unit #5HH | 10,000 | 25132199 |
| 645296Amendment | Aug 31, 2007 | Aug 31, 2007 | EOG Resources, Inc. | Martin Unit #5HH | 10,000 | 25132199 |
| 645295 | Aug 31, 2007 | Aug 31, 2007 | Devon Energy Production Co, L.P. | Muzyka, Louis #2HH | 9,000 | 25132198 |
| 645284 | Aug 31, 2007 | Aug 31, 2007 | Devon Energy Production Co, L.P. | Industrial Screw #1 | 9,000 | 25132200 |
| 645241 | Aug 31, 2007 | Aug 31, 2007 | Chesapeake Operating, Inc. | Wildberry #2HH | 9,000 | 25132195 |
| 645249 | Aug 30, 2007 | Aug 30, 2007 | EOG Resources, Inc. | Watkins #4HH | 10,000 | 25132197 |
| 645247 | Aug 30, 2007 | Aug 30, 2007 | EOG Resources, Inc. | Watkins #3HH | 10,000 | 25132196 |
| 645245 | Aug 30, 2007 | Aug 30, 2007 | EOG Resources, Inc. | Watkins #2HH | 10,000 | 25132194 |
| 643012 | Aug 30, 2007 | Aug 30, 2007 | XTO Energy Inc. | Harper Nej East #C 2AHH | 12,000 | 25132079 |
| 643012Amendment | Aug 30, 2007 | Aug 30, 2007 | XTO Energy Inc. | Harper Nej East #C 2AHH | 12,000 | 25132079 |
| 643011 | Aug 30, 2007 | Aug 30, 2007 | XTO Energy Inc. | Harper Nej West #B 2CHH | 12,000 | 25132078 |
| 643011Amendment | Aug 30, 2007 | Aug 30, 2007 | XTO Energy Inc. | Harper Nej West #B 2CHH | 12,000 | 25132078 |
| 645084 | Aug 29, 2007 | Aug 29, 2007 | Chesapeake Operating, Inc. | Smith, Lowell Jr. #1HH | 9,000 | 25132189 |
| 644967 | Aug 28, 2007 | Aug 28, 2007 | Devon Energy Production Co, L.P. | J. J. Atlas #8HH | 9,000 | 25132191 |
| 644963 | Aug 28, 2007 | Aug 28, 2007 | Devon Energy Production Co, L.P. | J. J. Atlas #7HH | 9,000 | 25132190 |
| 642583 | Aug 28, 2007 | Aug 28, 2007 | BP Operating Company, LLC | Brownlee Unit #3HH | 7,500 | 25132153 |
| 644971 | Aug 27, 2007 | Aug 27, 2007 | Devon Energy Production Co, L.P. | Atlas, J. J. #9HH | 9,000 | 25132187 |
| 644969 | Aug 27, 2007 | Aug 27, 2007 | XTO Energy Inc. | Alford Boone Unit #3HH | 11,000 | 25132186 |
| 644969Amendment | Aug 27, 2007 | Aug 27, 2007 | XTO Energy Inc. | Alford Boone Unit #3HH | 11,000 | 25132186 |
| 644939 | Aug 27, 2007 | Aug 27, 2007 | Chesapeake Operating, Inc. | Little Hoss 4 #O 1HH | 9,000 | 25132183 |
| 642002Amendment | Aug 27, 2007 | Aug 27, 2007 | EOG Resources, Inc. | Martin Unit #4HH | 10,000 | 25132009 |
| 642001Amendment | Aug 27, 2007 | Aug 27, 2007 | EOG Resources, Inc. | Martin Unit #3HH | 10,000 | 25132008 |
| 641859Amendment | Aug 27, 2007 | Aug 27, 2007 | EOG Resources, Inc. | Martin Unit #2HH | 10,000 | 25131992 |
| 644968 | Aug 24, 2007 | Aug 24, 2007 | Devon Energy Production Co, L.P. | Baylor-West #1HH | 9,000 | 25132185 |
| 644955 | Aug 24, 2007 | Aug 24, 2007 | EOG Resources, Inc. | Stewart Unit #5HH | 10,000 | 25132184 |
| 644947 | Aug 24, 2007 | Aug 24, 2007 | EOG Resources, Inc. | Moran Unit #1HH | 10,000 | 25132188 |
| 644947Amendment | Aug 24, 2007 | Aug 24, 2007 | EOG Resources, Inc. | Moran Unit #1HH | 10,000 | 25132188 |
| 644927 | Aug 24, 2007 | Aug 24, 2007 | XTO Energy Inc. | Cleburne State Park #3HH | 12,000 | 25132182 |
| 644927Amendment | Aug 24, 2007 | Aug 24, 2007 | XTO Energy Inc. | Cleburne State Park #3HH | 12,000 | 25132182 |
| 644893 | Aug 24, 2007 | Aug 24, 2007 | Chesapeake Operating, Inc. | Hanna #4HH | 9,000 | 25132181 |
| 644892 | Aug 24, 2007 | Aug 24, 2007 | Chesapeake Operating, Inc. | Hanna #3HH | 9,000 | 25132180 |
| 644890 | Aug 24, 2007 | Aug 24, 2007 | Chesapeake Operating, Inc. | Hanna #2HH | 9,000 | 25132179 |
| 644857 | Aug 23, 2007 | Aug 23, 2007 | Devon Energy Production Co, L.P. | Cain, Owen #1HH | 9,000 | 25132176 |
| 644857Amendment | Aug 23, 2007 | Aug 23, 2007 | Devon Energy Production Co, L.P. | Cain, Owen #1HH | 9,000 | 25132176 |
| 644800 | Aug 23, 2007 | Aug 23, 2007 | Sullivan, Hollis R. Inc. | Wadsworth #1HH | 8,500 | 25132175 |
| 644581 | Aug 23, 2007 | Aug 23, 2007 | Devon Energy Production Co, L.P. | West, Bob #11HH | 9,000 | 25132178 |
| 644575 | Aug 23, 2007 | Aug 23, 2007 | Devon Energy Production Co, L.P. | West, Bob #10HH | 9,000 | 25132177 |
| 643289 | Aug 23, 2007 | Aug 23, 2007 | Devon Energy Production Co, L.P. | Guttry Family #1HH | 9,000 | 25132108 |
| 644770 | Aug 22, 2007 | Aug 22, 2007 | Chesapeake Operating, Inc. | Little Hoss 7 #D 2HH | 9,000 | 25132171 |
| 644757 | Aug 22, 2007 | Aug 22, 2007 | Devon Energy Production Co, L.P. | McPherson, Ronny #3HH | 9,000 | 25132174 |
| 644752 | Aug 22, 2007 | Aug 22, 2007 | Devon Energy Production Co, L.P. | McPherson, Ronny #2HH | 9,000 | 25132173 |
| 644743 | Aug 22, 2007 | Aug 22, 2007 | Devon Energy Production Co, L.P. | McPherson, Ronny #1HH | 9,000 | 25132170 |
| 644709 | Aug 22, 2007 | Aug 22, 2007 | Paloma Resources, LLC | Martin Unit #1HH | 8,500 | 25132169 |
| 644709Amendment | Aug 22, 2007 | Aug 22, 2007 | Paloma Resources, LLC | Martin Unit #1HH | 8,500 | 25132169 |
| 644709Amendment | Aug 22, 2007 | Aug 22, 2007 | Chesapeake Operating, Inc. | Serena Beth #1HH | 9,000 | 25132169 |
| 644703 | Aug 22, 2007 | Aug 22, 2007 | Devon Energy Production Co, L.P. | Circle R Partnership #18HH | 9,000 | 25132168 |
| 644695 | Aug 22, 2007 | Aug 22, 2007 | Devon Energy Production Co, L.P. | Pitts, Charles #11HH | 9,000 | 25132167 |
| 644617 | Aug 22, 2007 | Aug 22, 2007 | EOG Resources, Inc. | Little Buddy Unit #5HH | 10,000 | 25132158 |
| 644617Amendment | Aug 22, 2007 | Aug 22, 2007 | EOG Resources, Inc. | Little Buddy Unit #5HH | 10,000 | 25132158 |
| 644617Amendment | Aug 22, 2007 | Aug 22, 2007 | EOG Resources, Inc. | Little Buddy Unit #5HH | 10,000 | 25132158 |
| 644609 | Aug 22, 2007 | Aug 22, 2007 | EOG Resources, Inc. | Little Buddy Unit #3HH | 10,000 | 25132157 |
| 644609Amendment | Aug 22, 2007 | Aug 22, 2007 | EOG Resources, Inc. | Little Buddy Unit #3HH | 10,000 | 25132157 |
| 644609Amendment | Aug 22, 2007 | Aug 22, 2007 | EOG Resources, Inc. | Little Buddy Unit #3HH | 10,000 | 25132157 |
| 644606 | Aug 22, 2007 | Aug 22, 2007 | EOG Resources, Inc. | Little Buddy Unit #1HH | 10,000 | 25132156 |