| 631536 | Jan 9, 2007 | Jan 9, 2007 | Chesapeake Operating, Inc. | Little Hoss #Y 6HH | 9,000 | 25131423 |
| 631535 | Jan 9, 2007 | Jan 9, 2007 | Chesapeake Operating, Inc. | Little Hoss #Y 5HH | 9,000 | 25131422 |
| 631534 | Jan 9, 2007 | Jan 9, 2007 | Chesapeake Operating, Inc. | Little Hoss #Y 4HH | 9,000 | 25131421 |
| 631529 | Jan 9, 2007 | Jan 9, 2007 | XTO Energy Inc. | Whitehead Unit #2HH | 11,000 | 25131420 |
| 631529Amendment | Jan 9, 2007 | Jan 9, 2007 | XTO Energy Inc. | Whitehead Unit #2HH | 12,500 | 25131420 |
| 631506 | Jan 9, 2007 | Jan 9, 2007 | Devon Energy Production Co, L.P. | Gary Crabtree #6H | 9,000 | 25131418 |
| 631502 | Jan 9, 2007 | Jan 9, 2007 | Devon Energy Production Co, L.P. | Gary Crabtree #5H | 9,000 | 25131417 |
| 631502Amendment | Jan 9, 2007 | Jan 9, 2007 | Devon Energy Production Co, L.P. | Gary Crabtree #5H | 9,000 | 25131417 |
| 631481 | Jan 9, 2007 | Jan 9, 2007 | Devon Energy Production Co, L.P. | Gary Crabtree #4H | 9,000 | 25131416 |
| 631476 | Jan 8, 2007 | Jan 8, 2007 | Aspect Energy, LLC | Baird #1HH | 9,300 | 25131415 |
| 631461 | Jan 8, 2007 | Jan 8, 2007 | Devon Energy Production Co, L.P. | Homer Allen #2H | 9,000 | 25131414 |
| 631436 | Jan 8, 2007 | Jan 8, 2007 | Range Production Company | Segerstrom #2HH | 8,500 | 25131413 |
| 631259 | Jan 3, 2007 | Jan 3, 2007 | XTO Energy Inc. | Crisp #1HH | 12,000 | 25131411 |
| 631259Amendment | Jan 3, 2007 | Jan 3, 2007 | XTO Energy Inc. | Crisp Unit #1HH | 12,000 | 25131411 |
| 631247 | Jan 3, 2007 | Jan 3, 2007 | EOG Resources, Inc. | Eagle Ford B Unit #6HH | 8,900 | 25131410 |
| 631245 | Jan 3, 2007 | Jan 3, 2007 | EOG Resources, Inc. | Eagle Ford B Unit #5 | 8,900 | 25131409 |
| 631213 | Jan 3, 2007 | Jan 3, 2007 | XTO Energy Inc. | Hobson McCoy Young Unit #2HH | 12,000 | 25131408 |
| 631213Amendment | Jan 3, 2007 | Jan 3, 2007 | XTO Energy Inc. | Hobson McCoy Young Unit #2HH | 12,000 | 25131408 |
| 631212 | Jan 3, 2007 | Jan 3, 2007 | XTO Energy Inc. | Morris Foust Unit #2HH | 12,000 | 25131407 |
| 631212Amendment | Jan 3, 2007 | Jan 3, 2007 | XTO Energy Inc. | Morris Foust Unit #2HH | 12,000 | 25131407 |
| 631092 | Dec 28, 2006 | Dec 28, 2006 | XTO Energy Inc. | Puff #3HH | 12,000 | 25131406 |
| 631092Amendment | Dec 28, 2006 | Dec 28, 2006 | XTO Energy Inc. | Puff #3HH | 12,000 | 25131406 |
| 631084 | Dec 28, 2006 | Dec 28, 2006 | Sullivan, Hollis R. Inc. | Wilshire #1HH | 8,500 | 25131405 |
| 631084Amendment | Dec 28, 2006 | Dec 28, 2006 | Sullivan, Hollis R. Inc. | Wilshire #1HH | 8,500 | 25131405 |
| 631084Amendment | Dec 28, 2006 | Dec 28, 2006 | Sullivan, Hollis R. Inc. | Wilshire #1HH | 8,500 | 25131405 |
| 631068 | Dec 28, 2006 | Dec 28, 2006 | Chesapeake Operating, Inc. | Little Hoss #N 4HH | 9,000 | 25131404 |
| 631061 | Dec 28, 2006 | Dec 28, 2006 | EOG Resources, Inc. | Kemp "B" Unit #3HH | 8,500 | 25131403 |
| 631060 | Dec 28, 2006 | Dec 28, 2006 | XTO Energy Inc. | Anna Marie Smith Unit #1HH | 12,000 | 25131401 |
| 631060Amendment | Dec 28, 2006 | Dec 28, 2006 | XTO Energy Inc. | Anna Marie Smith Unit #1HH | 12,000 | 25131401 |
| 631060Amendment | Dec 28, 2006 | Dec 28, 2006 | XTO Energy Inc. | Anna Marie Smith Unit #1HH | 12,000 | 25131401 |
| 631059 | Dec 28, 2006 | Dec 28, 2006 | EOG Resources, Inc. | Kemp "B" Unit #2HH | 8,500 | 25131402 |
| 631058 | Dec 28, 2006 | Dec 28, 2006 | EOG Resources, Inc. | Kemp "B" Unit #1HH | 8,500 | 25131400 |
| 631017 | Dec 27, 2006 | Dec 27, 2006 | Chesapeake Operating, Inc. | Little Hoss #N 5HH | 9,000 | 25131398 |
| 631016 | Dec 27, 2006 | Dec 27, 2006 | Chesapeake Operating, Inc. | Little Hoss #N 3HH | 9,000 | 25131399 |
| 630425 | Dec 22, 2006 | Dec 22, 2006 | EOG Resources, Inc. | River Hills #9HH | 7,000 | 25131388 |
| 630418 | Dec 22, 2006 | Dec 22, 2006 | EOG Resources, Inc. | River Hills #8HH | 7,000 | 25131387 |
| 630417 | Dec 22, 2006 | Dec 22, 2006 | EOG Resources, Inc. | River Hills #7HH | 7,000 | 25131386 |
| 630377 | Dec 22, 2006 | Dec 22, 2006 | EOG Resources, Inc. | Hays Unit #2HH | 7,000 | 25131385 |
| 630363 | Dec 22, 2006 | Dec 22, 2006 | EOG Resources, Inc. | U. S. Lime #14HH | 7,000 | 25131384 |
| 630363Amendment | Dec 22, 2006 | Dec 22, 2006 | EOG Resources, Inc. | U.S. Lime #14HH | 8,999 | 25131384 |
| 630359 | Dec 22, 2006 | Dec 22, 2006 | EOG Resources, Inc. | Kolar Unit #7HH | 7,000 | 25131382 |
| 630354 | Dec 22, 2006 | Dec 22, 2006 | EOG Resources, Inc. | Kolar Unit #6HH | 7,000 | 25131383 |
| 630354Amendment | Dec 22, 2006 | Dec 22, 2006 | EOG Resources, Inc. | Kolar Unit #6HH | 7,000 | 25131383 |
| 625625 | Dec 22, 2006 | Dec 22, 2006 | EOG Resources, Inc. | Rayburn Unit #1HH | 8,800 | 25131180 |
| 630943 | Dec 21, 2006 | Dec 21, 2006 | Chesapeake Operating, Inc. | Sandlin-Heritage #1HH | 9,000 | 25131397 |
| 630939 | Dec 21, 2006 | Dec 21, 2006 | Chesapeake Operating, Inc. | Sandlin-Heritage #A 1HH | 9,000 | 25131396 |
| 630900 | Dec 21, 2006 | Dec 21, 2006 | Sullivan, Hollis R. Inc. | Smith #1HH | 8,500 | 25131395 |
| 630873 | Dec 21, 2006 | Dec 21, 2006 | Chesapeake Operating, Inc. | Sandlin-Heritage #A 2HH | 9,000 | 25131393 |
| 630864 | Dec 21, 2006 | Dec 21, 2006 | North Texas Llano Operating Corp | Franklin #1H | 9,000 | 25131394 |
| 630757 | Dec 20, 2006 | Dec 20, 2006 | Chesapeake Operating, Inc. | East Godley #11HH | 9,000 | 25131392 |
| 630755 | Dec 19, 2006 | Dec 19, 2006 | Chesapeake Operating, Inc. | East Godley #10HH | 9,000 | 25131391 |
| 630743 | Dec 19, 2006 | Dec 19, 2006 | Chesapeake Operating, Inc. | Chipshot #4HH | 9,000 | 25131390 |
| 630740 | Dec 19, 2006 | Dec 19, 2006 | Chesapeake Operating, Inc. | Chipshot #3HH | 9,000 | 25131389 |
| 629914 | Dec 15, 2006 | Dec 15, 2006 | EOG Resources, Inc. | Ferguson Foundation Unit #8HH | 8,900 | 25131379 |
| 629914Amendment | Dec 15, 2006 | Dec 15, 2006 | EOG Resources, Inc. | Ferguson Foundation Unit #8HH | 10,000 | 25131379 |
| 629914Amendment | Dec 15, 2006 | Dec 15, 2006 | EOG Resources, Inc. | Ferguson Foundation Unit #8HH | 10,000 | 25131379 |
| 630368 | Dec 14, 2006 | Dec 14, 2006 | XTO Energy Inc. | Cleburne State Park #4HH | 12,000 | 25131381 |
| 630368Amendment | Dec 14, 2006 | Dec 14, 2006 | XTO Energy Inc. | Cleburne State Park #4HH | 12,000 | 25131381 |
| 630468 | Dec 13, 2006 | Dec 13, 2006 | Chesapeake Operating, Inc. | Vivian #3HH | 9,000 | 25131376 |
| 630466 | Dec 13, 2006 | Dec 13, 2006 | Chesapeake Operating, Inc. | Vivian #4HH | 9,000 | 25131378 |
| 630462 | Dec 13, 2006 | Dec 13, 2006 | Quicksilver Resources Inc. | Freeland Unit #3HH | 6,400 | 25131380 |
| 630461 | Dec 13, 2006 | Dec 13, 2006 | Quicksilver Resources Inc. | Carl Carlson #3HH | 6,400 | 25131375 |
| 630459 | Dec 13, 2006 | Dec 13, 2006 | Quicksilver Resources Inc. | Carl Carlson #2HH | 6,400 | 25131377 |
| 630459Amendment | Dec 13, 2006 | Dec 13, 2006 | Quicksilver Resources Inc. | Carl Carlson #2HH | 6,400 | 25131377 |
| 630452 | Dec 13, 2006 | Dec 13, 2006 | Devon Energy Production Co, L.P. | Circle R Partnership #6HH | 9,000 | 25131374 |
| 630402 | Dec 12, 2006 | Dec 12, 2006 | Devon Energy Production Co, L.P. | Jeff McCarver #2H | 9,000 | 25131372 |
| 630378 | Dec 12, 2006 | Dec 12, 2006 | Devon Energy Production Co, L.P. | West & West #1HH | 9,000 | 25131371 |
| 630319 | Dec 12, 2006 | Dec 12, 2006 | Joint Resources Company | Walker Brummett #2 HH | 8,999 | 25131370 |
| 630306 | Dec 12, 2006 | Dec 12, 2006 | North Texas Llano Operating Corp | Cook Hills #2 HH | 8,200 | 25131369 |
| 630274 | Dec 11, 2006 | Dec 11, 2006 | Chesapeake Operating, Inc. | North Lake #7HH | 9,000 | 25131368 |
| 630274Amendment | Dec 11, 2006 | Dec 11, 2006 | Chesapeake Operating, Inc. | North Lake #7HH | 9,000 | 25131368 |
| 630267 | Dec 11, 2006 | Dec 11, 2006 | XTO Energy Inc. | Glass Calahan Unit #1HH | 12,000 | 25131367 |
| 630267Amendment | Dec 11, 2006 | Dec 11, 2006 | XTO Energy Inc. | Glass Calahan Unit #1HH | 11,000 | 25131367 |
| 629453 | Dec 8, 2006 | Dec 8, 2006 | EOG Resources, Inc. | Fricks #5HH | 7,000 | 25131365 |
| 629400 | Dec 8, 2006 | Dec 8, 2006 | EOG Resources, Inc. | Fricks #4HH | 7,000 | 25131364 |
| 629400Amendment | Dec 8, 2006 | Dec 8, 2006 | EOG Resources, Inc. | Dillon Unit #1HH | 7,000 | 25131364 |
| 630139 | Dec 7, 2006 | Dec 7, 2006 | EOG Resources, Inc. | Tolbert Unit #2HH | 8,800 | 25131366 |
| 630054 | Dec 7, 2006 | Dec 7, 2006 | Devon Energy Production Co, L.P. | Richard Russo #1HH | 9,000 | 25131362 |
| 630044 | Dec 6, 2006 | Dec 6, 2006 | Quicksilver Resources Inc. | Carlson, Carl #1HH | 6,400 | 25131363 |
| 629206 | Dec 6, 2006 | Dec 6, 2006 | Burlington Resources O & G Co LP | Georges Creek Ranch #8HH | 9,000 | 25131359 |
| 629986 | Dec 5, 2006 | Dec 5, 2006 | Chesapeake Operating, Inc. | Bell, Addie #1HH | 9,000 | 25131361 |
| 629985 | Dec 5, 2006 | Dec 5, 2006 | Chesapeake Operating, Inc. | Allen #1HH | 9,000 | 25131360 |
| 629985Amendment | Dec 5, 2006 | Dec 5, 2006 | Chesapeake Operating, Inc. | Allen #1HH | 9,000 | 25131360 |
| 629946 | Dec 5, 2006 | Dec 5, 2006 | Joint Resources Company | Sessum #1 HH | 9,100 | 25131358 |
| 629946Amendment | Dec 5, 2006 | Dec 5, 2006 | XTO Energy Inc. | Sessum Unit #1 HH | 11,000 | 25131358 |
| 629919 | Dec 4, 2006 | Dec 4, 2006 | EOG Resources, Inc. | Pressley Unit #4HH | 8,800 | 25131357 |
| 629918 | Dec 4, 2006 | Dec 4, 2006 | EOG Resources, Inc. | Pressley Unit #3HH | 8,800 | 25131356 |
| 629906 | Dec 4, 2006 | Dec 4, 2006 | Burnett Oil Co., Inc. | Decleva #1HH | 7,560 | 25131355 |
| 629900 | Dec 4, 2006 | Dec 4, 2006 | Chesapeake Operating, Inc. | Johns Manville #3HH | 9,000 | 25131354 |
| 629882 | Dec 4, 2006 | Dec 4, 2006 | Quicksilver Resources Inc. | Ralph Wiggum #4HH | 6,400 | 25131353 |
| 629879 | Dec 4, 2006 | Dec 4, 2006 | Quicksilver Resources Inc. | Ralph Wiggum #3HH | 6,400 | 25131351 |
| 629083 | Dec 4, 2006 | Dec 4, 2006 | Encana Oil & Gas(usa) Inc. | Masters #2HH | 9,000 | 25131352 |
| 629798 | Dec 1, 2006 | Dec 1, 2006 | Chesapeake Operating, Inc. | Damsel Fly Nymph #4HH | 9,000 | 25131350 |
| 629798Amendment | Dec 1, 2006 | Dec 1, 2006 | Chesapeake Operating, Inc. | Damsel Fly Nymph #4HH | 9,000 | 25131350 |
| 629793 | Dec 1, 2006 | Dec 1, 2006 | Chesapeake Operating, Inc. | Damsel Fly Nymph #3HH | 9,000 | 25131349 |
| 629793Amendment | Dec 1, 2006 | Dec 1, 2006 | Chesapeake Operating, Inc. | Damsel Fly Nymph #3HH | 9,000 | 25131349 |
| 629724 | Nov 30, 2006 | Nov 30, 2006 | Chesapeake Operating, Inc. | White Wing Coachman "A" #7HH | 9,000 | 25131348 |
| 629720 | Nov 30, 2006 | Nov 30, 2006 | Chesapeake Operating, Inc. | White Wing Coachman "A" #5HH | 9,000 | 25131347 |
| 629709 | Nov 30, 2006 | Nov 30, 2006 | EOG Resources, Inc. | Kemp D #3HH | 8,800 | 25131346 |
| 629699 | Nov 30, 2006 | Nov 30, 2006 | EOG Resources, Inc. | Kemp D #2HH | 8,800 | 25131345 |