| 627967 | Oct 24, 2006 | Oct 24, 2006 | Chesapeake Operating, Inc. | Little Hoss #X 3HH | 9,000 | 25131284 |
| 627965 | Oct 24, 2006 | Oct 24, 2006 | Chesapeake Operating, Inc. | Little Hoss #X 4HH | 9,000 | 25131285 |
| 627949 | Oct 24, 2006 | Oct 24, 2006 | Devon Energy Production Co, L.P. | Hall, Brenda #1H | 9,000 | 25131282 |
| 627941 | Oct 23, 2006 | Oct 23, 2006 | Devon Energy Production Co, L.P. | Graham, Joy #1H | 9,000 | 25131281 |
| 627444 | Oct 23, 2006 | Oct 23, 2006 | EOG Resources, Inc. | Heffner Unit #3HH | 7,700 | 25131267 |
| 627892 | Oct 20, 2006 | Oct 20, 2006 | EOG Resources, Inc. | Prospect Co Unit #1HH | 8,900 | 25131275 |
| 627892Amendment | Oct 20, 2006 | Oct 20, 2006 | EOG Resources, Inc. | Prospect Co Unit #1HH | 8,900 | 25131275 |
| 627847 | Oct 20, 2006 | Oct 20, 2006 | Chesapeake Operating, Inc. | Little Hoss #Z 1HH | 9,000 | 25131274 |
| 626020 | Oct 20, 2006 | Oct 20, 2006 | Shale Tank Truck L.P. | Yard, Cleburne #1 | 11,500 | 25131266 |
| 627811 | Oct 19, 2006 | Oct 19, 2006 | Chesapeake Operating, Inc. | Little Hoss #Z 2HH | 9,000 | 25131273 |
| 627777 | Oct 19, 2006 | Oct 19, 2006 | Chesapeake Operating, Inc. | Little Hoss #Z 3HH | 9,000 | 25131272 |
| 627752 | Oct 19, 2006 | Oct 19, 2006 | Chesapeake Operating, Inc. | Miller #1HH | 9,000 | 25131271 |
| 627644 | Oct 18, 2006 | Oct 18, 2006 | Chesapeake Operating, Inc. | Barbee #1HH | 9,000 | 25131269 |
| 627226 | Oct 18, 2006 | Oct 18, 2006 | EOG Resources, Inc. | Sprimont Unit #2HH | 8,800 | 25131258 |
| 627226Amendment | Oct 18, 2006 | Oct 18, 2006 | EOG Resources, Inc. | Sprimont Unit #2HH | 8,800 | 25131258 |
| 627213 | Oct 18, 2006 | Oct 18, 2006 | EOG Resources, Inc. | Sprimont Unit #1HH | 8,800 | 25131257 |
| 627213Amendment | Oct 18, 2006 | Oct 18, 2006 | EOG Resources, Inc. | Sprimont Unit #1HH | 8,800 | 25131257 |
| 627645 | Oct 17, 2006 | Oct 17, 2006 | Williams Prod. Gulf Coast, L.P. | Prado #1HH | 8,000 | 25131268 |
| 627645Amendment | Oct 17, 2006 | Oct 17, 2006 | Williams Prod. Gulf Coast, L.P. | Prado #1HH | 8,000 | 25131268 |
| 627604 | Oct 17, 2006 | Oct 17, 2006 | Chesapeake Operating, Inc. | Tantarra Estates #1HH | 9,000 | 25131270 |
| 627128 | Oct 17, 2006 | Oct 17, 2006 | EOG Resources, Inc. | Walking T Ranch Unit #2 | 8,900 | 25131255 |
| 627127 | Oct 17, 2006 | Oct 17, 2006 | EOG Resources, Inc. | Walking T Ranch Unit #1 | 9,000 | 25131256 |
| 627594 | Oct 16, 2006 | Oct 16, 2006 | Aspect Energy, LLC | Dotson #1HH | 9,000 | 25131265 |
| 627594Amendment | Oct 16, 2006 | Oct 16, 2006 | Aspect Energy, LLC | Dotson #1HH | 9,000 | 25131265 |
| 627584 | Oct 16, 2006 | Oct 16, 2006 | Chesapeake Operating, Inc. | Kendrick #3HH | 9,000 | 25131264 |
| 627583 | Oct 16, 2006 | Oct 16, 2006 | Chesapeake Operating, Inc. | Kendrick #2HH | 9,000 | 25131263 |
| 627582 | Oct 16, 2006 | Oct 16, 2006 | Chesapeake Operating, Inc. | Kendrick #1HH | 9,000 | 25131262 |
| 627393 | Oct 16, 2006 | Oct 16, 2006 | Range Production Company | Delutis #2HH | 8,000 | 25130534 |
| 627460 | Oct 13, 2006 | Oct 13, 2006 | EOG Resources, Inc. | Meeks Unit #3 | 8,000 | 25131261 |
| 627430 | Oct 12, 2006 | Oct 12, 2006 | Range Production Company | Jackson Deaver #1HH | 8,700 | 25131260 |
| 627404 | Oct 12, 2006 | Oct 12, 2006 | EOG Resources, Inc. | Thompson Unit #1HH | 8,800 | 25131259 |
| 627307 | Oct 12, 2006 | Oct 12, 2006 | Tsar Operating Company | Mustang Creek #3 | 6,600 | 25130994 |
| 627289 | Oct 11, 2006 | Oct 11, 2006 | Joint Resources Company | Hutchens #1HH | 10,500 | 25131254 |
| 627261 | Oct 10, 2006 | Oct 10, 2006 | XTO Energy Inc. | Winnet Unit #2HH | 12,000 | 25131253 |
| 627261Amendment | Oct 10, 2006 | Oct 10, 2006 | XTO Energy Inc. | Winnet Unit #2HH | 12,000 | 25131253 |
| 627258 | Oct 10, 2006 | Oct 10, 2006 | Chesapeake Operating, Inc. | Mayfly Emerger #5HH | 9,000 | 25131252 |
| 627256 | Oct 10, 2006 | Oct 10, 2006 | Chesapeake Operating, Inc. | Mayfly Emerger #4HH | 9,000 | 25131251 |
| 627251 | Oct 10, 2006 | Oct 10, 2006 | Chesapeake Operating, Inc. | South Lake #2 | 9,000 | 25130319 |
| 627231 | Oct 10, 2006 | Oct 10, 2006 | EOG Resources, Inc. | Sprimont Unit #3HH | 8,800 | 25131250 |
| 626941 | Oct 9, 2006 | Oct 9, 2006 | Encana Oil & Gas(usa) Inc. | Classic Oaks Unit #3HH | 9,000 | 25131247 |
| 626941Amendment | Oct 9, 2006 | Oct 9, 2006 | Encana Oil & Gas(usa) Inc. | Classic Oaks Unit #3HH | 9,000 | 25131247 |
| 626940 | Oct 9, 2006 | Oct 9, 2006 | Encana Oil & Gas(usa) Inc. | Classic Oaks Unit #4HH | 9,000 | 25131246 |
| 626940Amendment | Oct 9, 2006 | Oct 9, 2006 | Encana Oil & Gas(usa) Inc. | Classic Oaks Unit #4HH | 9,000 | 25131246 |
| 626935 | Oct 9, 2006 | Oct 9, 2006 | Encana Oil & Gas(usa) Inc. | Classic Oaks Unit #2HH | 9,000 | 25131245 |
| 627159 | Oct 6, 2006 | Oct 6, 2006 | Quicksilver Resources Inc. | Lenny Leonard #1HH | 6,400 | 25131248 |
| 627145 | Oct 6, 2006 | Oct 6, 2006 | Devon Energy Production Co, L.P. | Billy Jack Springer #1H | 9,000 | 25131249 |
| 627131 | Oct 6, 2006 | Oct 6, 2006 | EOG Resources, Inc. | KTV Caddo Unit #2HH | 7,000 | 25131244 |
| 626797 | Oct 6, 2006 | Oct 6, 2006 | EOG Resources, Inc. | Henry Teich #3HH | 7,000 | 25131237 |
| 626772 | Oct 6, 2006 | Oct 6, 2006 | EOG Resources, Inc. | Trulove Unit #5HH | 8,700 | 25131235 |
| 626761 | Oct 6, 2006 | Oct 6, 2006 | EOG Resources, Inc. | Trulove Unit #4HH | 8,700 | 25131234 |
| 626758 | Oct 6, 2006 | Oct 6, 2006 | EOG Resources, Inc. | Trulove Unit #3HH | 8,700 | 25131241 |
| 626757 | Oct 6, 2006 | Oct 6, 2006 | EOG Resources, Inc. | Trulove Unit #2HH | 8,900 | 25131240 |
| 627036 | Oct 5, 2006 | Oct 5, 2006 | Chesapeake Operating, Inc. | Williams #10HH | 9,000 | 25131242 |
| 627033 | Oct 5, 2006 | Oct 5, 2006 | Chesapeake Operating, Inc. | Williams #9HH | 9,000 | 25131243 |
| 626699 | Oct 5, 2006 | Oct 5, 2006 | EOG Resources, Inc. | Hardcastle Unit #10HH | 7,000 | 25131233 |
| 626694 | Oct 5, 2006 | Oct 5, 2006 | EOG Resources, Inc. | Hardcastle Unit #9HH | 7,000 | 25131231 |
| 626660 | Oct 5, 2006 | Oct 5, 2006 | EOG Resources, Inc. | Hardcastle Unit #8HH | 9,000 | 25131229 |
| 626992 | Oct 4, 2006 | Oct 4, 2006 | Chesapeake Operating, Inc. | Mize Family #34HH | 9,000 | 25131239 |
| 626990 | Oct 4, 2006 | Oct 4, 2006 | Chesapeake Operating, Inc. | Mize Family #32HH | 9,000 | 25131238 |
| 626985 | Oct 4, 2006 | Oct 4, 2006 | Chesapeake Operating, Inc. | Mize Family #17HH | 9,000 | 25131236 |
| 626553 | Oct 4, 2006 | Oct 4, 2006 | EOG Resources, Inc. | Hardcastle Unit #7HH | 7,000 | 25131222 |
| 626551 | Oct 4, 2006 | Oct 4, 2006 | EOG Resources, Inc. | Hardcastle Unit #6HH | 7,000 | 25131221 |
| 626546 | Oct 4, 2006 | Oct 4, 2006 | Williams Prod. Gulf Coast, L.P. | Taylor #1HH | 8,100 | 25131220 |
| 626888 | Oct 3, 2006 | Oct 3, 2006 | J-W Operating Co. | Martin, J L #3HH | 15,000 | 25131232 |
| 626888Amendment | Oct 3, 2006 | Oct 3, 2006 | J-W Operating Co. | Martin, J L #3HH | 15,000 | 25131232 |
| 626863 | Oct 2, 2006 | Oct 2, 2006 | Chesapeake Operating, Inc. | South Chisholm Trail #3HH | 9,000 | 25131230 |
| 626863Amendment | Oct 2, 2006 | Oct 2, 2006 | Chesapeake Operating, Inc. | South Chisholm Trail #3HH | 9,000 | 25131230 |
| 626830 | Oct 2, 2006 | Oct 2, 2006 | XTO Energy Inc. | Jane Marshall a Unit #2HH | 12,000 | 25131228 |
| 626830Amendment | Oct 2, 2006 | Oct 2, 2006 | XTO Energy Inc. | Jane Marshall a Unit #2HH | 12,000 | 25131228 |
| 626824 | Oct 2, 2006 | Oct 2, 2006 | EOG Resources, Inc. | Decker Unit #1HH | 8,700 | 25131227 |
| 626824Amendment | Oct 2, 2006 | Oct 2, 2006 | EOG Resources, Inc. | Decker Unit #1HH | 8,700 | 25131227 |
| 626755 | Sep 29, 2006 | Sep 29, 2006 | XTO Energy Inc. | Sda Burleson Unit #1HH | 12,000 | 25131226 |
| 626755Amendment | Sep 29, 2006 | Sep 29, 2006 | XTO Energy Inc. | Sda Burleson Unit #1HH | 12,000 | 25131226 |
| 626731 | Sep 29, 2006 | Sep 29, 2006 | Sullivan, Hollis R. Inc. | McAdoo #1HH | 8,700 | 25131225 |
| 626385 | Sep 29, 2006 | Sep 29, 2006 | EOG Resources, Inc. | Schultz "a" Unit #3HH | 7,000 | 25131214 |
| 626385Amendment | Sep 29, 2006 | Sep 29, 2006 | EOG Resources, Inc. | Schultz "a" Unit #3HH | 7,000 | 25131214 |
| 626725 | Sep 28, 2006 | Sep 28, 2006 | Arrington,david H. Oil & Gas,inc | Leech, Bunny #1HH | 8,500 | 25131223 |
| 626688 | Sep 28, 2006 | Sep 28, 2006 | EOG Resources, Inc. | Tolbert Unit #1HH | 8,900 | 25131219 |
| 626688Amendment | Sep 28, 2006 | Sep 28, 2006 | EOG Resources, Inc. | Tolbert Unit #1HH | 8,900 | 25131219 |
| 626549 | Sep 28, 2006 | Sep 28, 2006 | EOG Resources, Inc. | Hardcastle Unit #5HH | 7,000 | 25131218 |
| 626536 | Sep 28, 2006 | Sep 28, 2006 | EOG Resources, Inc. | Hardcastle Unit #4HH | 7,000 | 25131217 |
| 626434 | Sep 28, 2006 | Sep 28, 2006 | XTO Energy Inc. | Hartnett Unit #1HH | 11,000 | 25131224 |
| 626434Amendment | Sep 28, 2006 | Sep 28, 2006 | XTO Energy Inc. | Hartnett Unit #1HH | 11,000 | 25131224 |
| 626321 | Sep 28, 2006 | Sep 28, 2006 | EOG Resources, Inc. | U.S. Lime #10HH | 7,000 | 25131208 |
| 626262 | Sep 28, 2006 | Sep 28, 2006 | EOG Resources, Inc. | Double Diamond #6HH | 7,000 | 25131206 |
| 626600 | Sep 27, 2006 | Sep 27, 2006 | J-W Operating Co. | Tcu #1HH | 15,000 | 25131216 |
| 626529 | Sep 26, 2006 | Sep 26, 2006 | EOG Resources, Inc. | Kemp D #1HH | 8,600 | 25131215 |
| 626475 | Sep 25, 2006 | Sep 25, 2006 | Chesapeake Operating, Inc. | Little Hoss #I 2HH | 9,000 | 25131211 |
| 626475Amendment | Sep 25, 2006 | Sep 25, 2006 | Chesapeake Operating, Inc. | Little Hoss #I 2HH | 9,000 | 25131211 |
| 626474 | Sep 25, 2006 | Sep 25, 2006 | Chesapeake Operating, Inc. | Little Hoss #I 3HH | 9,000 | 25131212 |
| 626473 | Sep 25, 2006 | Sep 25, 2006 | Chesapeake Operating, Inc. | Little Hoss #I 4HH | 9,000 | 25131213 |
| 626449 | Sep 25, 2006 | Sep 25, 2006 | Chesapeake Operating, Inc. | Johns Manville #7HH | 9,000 | 25131210 |
| 626449Amendment | Sep 25, 2006 | Sep 25, 2006 | Chesapeake Operating, Inc. | Johns Manville #7HH | 9,000 | 25131210 |
| 626438 | Sep 22, 2006 | Sep 22, 2006 | Reichmann Petroleum Corp. | Lawrence #1HH | 10,500 | 25131209 |
| 626438Amendment | Sep 22, 2006 | Sep 22, 2006 | Reichmann Petroleum Corp. | Lawrence #1HH | 10,500 | 25131209 |
| 626391 | Sep 22, 2006 | Sep 22, 2006 | XTO Energy Inc. | High View Estates #A 1HH | 10,000 | 25131207 |
| 626391Amendment | Sep 22, 2006 | Sep 22, 2006 | XTO Energy Inc. | High View Estates #A 1HH | 10,000 | 25131207 |
| 626228 | Sep 22, 2006 | Sep 22, 2006 | EOG Resources, Inc. | Durbin Unit #1HH | 8,500 | 25131205 |
| 626228Amendment | Sep 22, 2006 | Sep 22, 2006 | EOG Resources, Inc. | Durbin Unit #1HH | 8,500 | 25131205 |
| 626228Amendment | Sep 22, 2006 | Sep 22, 2006 | EOG Resources, Inc. | Durbin Unit #1HH | 8,500 | 25131205 |