| 648115Amendment | Oct 24, 2007 | Oct 24, 2007 | Quicksilver Resources Inc. | Price Unit #1HH | 9,000 | 22131512 |
| 647825 | Oct 18, 2007 | Oct 18, 2007 | Dte Gas Resources, Inc. | Lipan #1HH | 6,000 | 22131511 |
| 647747 | Oct 17, 2007 | Oct 17, 2007 | Burlington Resources O & G Co LP | Bowser Ranch #4HH | 9,000 | 22131510 |
| 647673 | Oct 16, 2007 | Oct 16, 2007 | Aspect Energy, LLC | Porter #3HH | 7,000 | 22131509 |
| 647569 | Oct 16, 2007 | Oct 16, 2007 | Arrington,david H. Oil & Gas,inc | Kiwi Muddler #3HH | 6,200 | 22131508 |
| 647562 | Oct 16, 2007 | Oct 16, 2007 | Quicksilver Resources Inc. | Sherry P Unit #8HH | 9,000 | 22131507 |
| 647549 | Oct 16, 2007 | Oct 16, 2007 | Arrington,david H. Oil & Gas,inc | Kiwi Muddler #2HH | 6,200 | 22131506 |
| 647513 | Oct 15, 2007 | Oct 15, 2007 | Arrington,david H. Oil & Gas,inc | Kiwi Muddler #1HH | 6,200 | 22131505 |
| 647028 | Oct 5, 2007 | Oct 5, 2007 | Burlington Resources O & G Co LP | Triple Creek "C" #2HH | 9,000 | 22131504 |
| 647022 | Oct 5, 2007 | Oct 5, 2007 | Quicksilver Resources Inc. | Sherry P Unit #7HH | 9,000 | 22131503 |
| 647018 | Oct 4, 2007 | Oct 4, 2007 | Quicksilver Resources Inc. | Sherry P Unit #6HH | 9,000 | 22131502 |
| 647017 | Oct 4, 2007 | Oct 4, 2007 | Quicksilver Resources Inc. | Sherry P Unit #5HH | 9,000 | 22131501 |
| 646757 | Oct 1, 2007 | Oct 1, 2007 | Quicksilver Resources Inc. | Langdon Unit A #3HH | 9,000 | 22131499 |
| 646757Amendment | Oct 1, 2007 | Oct 1, 2007 | Quicksilver Resources Inc. | Langdon Unit A #3HH | 9,000 | 22131499 |
| 646755 | Oct 1, 2007 | Oct 1, 2007 | Quicksilver Resources Inc. | Langdon Unit A #2HH | 9,000 | 22131500 |
| 646758 | Sep 28, 2007 | Sep 28, 2007 | Quicksilver Resources Inc. | Langdon Unit A #4HH | 9,000 | 22131498 |
| 646745 | Sep 28, 2007 | Sep 28, 2007 | Quicksilver Resources Inc. | Stewart Unit #3HH | 9,000 | 22131496 |
| 646744 | Sep 28, 2007 | Sep 28, 2007 | Quicksilver Resources Inc. | Stewart Unit #2HH | 9,000 | 22131497 |
| 646269 | Sep 21, 2007 | Sep 21, 2007 | Quicksilver Resources Inc. | Williams-Finn Unit #4HH | 9,000 | 22131495 |
| 646266 | Sep 21, 2007 | Sep 21, 2007 | Quicksilver Resources Inc. | Williams-Finn Unit #3HH | 9,000 | 22131494 |
| 646236 | Sep 21, 2007 | Sep 21, 2007 | Quicksilver Resources Inc. | T&P Unit #7HH | 9,000 | 22131491 |
| 646235 | Sep 21, 2007 | Sep 21, 2007 | Quicksilver Resources Inc. | T&P Unit #6HH | 9,000 | 22131490 |
| 646234 | Sep 21, 2007 | Sep 21, 2007 | Quicksilver Resources Inc. | T&P Unit #5HH | 9,000 | 22131489 |
| 646217 | Sep 21, 2007 | Sep 21, 2007 | Quicksilver Resources Inc. | Sherry P Unit #4HH | 9,000 | 22131492 |
| 646214 | Sep 21, 2007 | Sep 21, 2007 | Quicksilver Resources Inc. | Sherry P Unit #3HH | 9,000 | 22131493 |
| 646043 | Sep 18, 2007 | Sep 18, 2007 | Burlington Resources O & G Co LP | Triple Creek "C" #1HH | 9,000 | 22131488 |
| 645861 | Sep 14, 2007 | Sep 14, 2007 | Devon Energy Production Co, L.P. | Wakefield, Sandra #4HH | 9,000 | 22131486 |
| 645861Amendment | Sep 14, 2007 | Sep 14, 2007 | Devon Energy Production Co, L.P. | Wakefield, Sandra #4HH | 9,000 | 22131486 |
| 645860 | Sep 14, 2007 | Sep 14, 2007 | Devon Energy Production Co, L.P. | Wakefield, Sandra #3HH | 9,000 | 22131485 |
| 645860Amendment | Sep 14, 2007 | Sep 14, 2007 | Devon Energy Production Co, L.P. | Wakefield, Sandra #3HH | 9,000 | 22131485 |
| 645859 | Sep 14, 2007 | Sep 14, 2007 | Devon Energy Production Co, L.P. | Sandra Wakefield #2HH | 9,000 | 22131487 |
| 645676 | Sep 14, 2007 | Sep 14, 2007 | Adkins, R. L. Corp. | Hopper #2HH | 6,500 | 22131484 |
| 643298Amendment | Sep 14, 2007 | Sep 14, 2007 | EOG Resources, Inc. | Branch Farms #2HH | 5,700 | 22131445 |
| 645776 | Sep 13, 2007 | Sep 13, 2007 | Quicksilver Resources Inc. | Williams-Finn Unit #2HH | 9,000 | 22131483 |
| 645773 | Sep 13, 2007 | Sep 13, 2007 | Quicksilver Resources Inc. | Williams-Finn Unit #1HH | 9,000 | 22131482 |
| 645400 | Sep 4, 2007 | Sep 4, 2007 | EOG Resources, Inc. | Black, Robert #1HH | 6,200 | 22131481 |
| 645400Amendment | Sep 4, 2007 | Sep 4, 2007 | EOG Resources, Inc. | Black Ranch #A 1 | 6,200 | 22131481 |
| 645391 | Sep 4, 2007 | Sep 4, 2007 | Quicksilver Resources Inc. | T&P Unit #3HH | 9,000 | 22131478 |
| 645391Amendment | Sep 4, 2007 | Sep 4, 2007 | Quicksilver Resources Inc. | T&P Unit #3HH | 9,000 | 22131478 |
| 645390 | Sep 4, 2007 | Sep 4, 2007 | Quicksilver Resources Inc. | T&P Unit #4HH | 9,000 | 22131480 |
| 645390Amendment | Sep 4, 2007 | Sep 4, 2007 | Quicksilver Resources Inc. | T&P Unit #4HH | 9,000 | 22131480 |
| 645390Amendment | Sep 4, 2007 | Sep 4, 2007 | Quicksilver Resources Inc. | T&P Unit #4HH | 9,000 | 22131480 |
| 645386 | Sep 4, 2007 | Sep 4, 2007 | Quicksilver Resources Inc. | T&P Unit #2HH | 9,000 | 22131479 |
| 645386Amendment | Sep 4, 2007 | Sep 4, 2007 | Quicksilver Resources Inc. | T&P Unit #2HH | 9,000 | 22131479 |
| 645385 | Sep 4, 2007 | Sep 4, 2007 | Quicksilver Resources Inc. | T&P Unit #1HH | 9,000 | 22131477 |
| 645385Amendment | Sep 4, 2007 | Sep 4, 2007 | Quicksilver Resources Inc. | T&P Unit #1HH | 9,000 | 22131477 |
| 645385Amendment | Sep 4, 2007 | Sep 4, 2007 | Quicksilver Resources Inc. | T&P Unit #1HH | 9,000 | 22131477 |
| 645318 | Aug 31, 2007 | Aug 31, 2007 | Quicksilver Resources Inc. | Sherry P Unit #2HH | 9,000 | 22131475 |
| 645318Amendment | Aug 31, 2007 | Aug 31, 2007 | Quicksilver Resources Inc. | Sherry P Unit #2HH | 9,000 | 22131475 |
| 645316 | Aug 31, 2007 | Aug 31, 2007 | Quicksilver Resources Inc. | Sherry P Unit #1HH | 9,000 | 22131476 |
| 645209 | Aug 30, 2007 | Aug 30, 2007 | Chesapeake Operating, Inc. | Little Hoss 7 #F 4HH | 9,000 | 22131474 |
| 645206 | Aug 30, 2007 | Aug 30, 2007 | Chesapeake Operating, Inc. | Little Hoss 7 #F 2HH | 9,000 | 22131473 |
| 645012 | Aug 30, 2007 | Aug 30, 2007 | Quicksilver Resources Inc. | Colonel Flagg Unit #6HH | 9,000 | 22131469 |
| 645044 | Aug 29, 2007 | Aug 29, 2007 | XTO Energy Inc. | Black Ranch South #B 2HH | 11,000 | 22131472 |
| 645044Amendment | Aug 29, 2007 | Aug 29, 2007 | XTO Energy Inc. | Black Ranch South #B 2HH | 10,000 | 22131472 |
| 645013 | Aug 28, 2007 | Aug 28, 2007 | Quicksilver Resources Inc. | Colonel Flagg Unit #7HH | 9,000 | 22131470 |
| 644996 | Aug 28, 2007 | Aug 28, 2007 | Quicksilver Resources Inc. | Trapper John Unit #4HH | 9,000 | 22131465 |
| 645007 | Aug 27, 2007 | Aug 27, 2007 | Quicksilver Resources Inc. | Colonel Flagg Unit #5HH | 9,000 | 22131468 |
| 645004 | Aug 27, 2007 | Aug 27, 2007 | Quicksilver Resources Inc. | Colonel Flagg Unit #4HH | 9,000 | 22131467 |
| 645003 | Aug 27, 2007 | Aug 27, 2007 | Quicksilver Resources Inc. | Major Burns Unit #2HH | 9,000 | 22131466 |
| 644997 | Aug 27, 2007 | Aug 27, 2007 | Quicksilver Resources Inc. | Trapper John #3HH | 9,000 | 22131471 |
| 644910 | Aug 24, 2007 | Aug 24, 2007 | Quicksilver Resources Inc. | Colonel Flagg Unit #3HH | 9,000 | 22131463 |
| 644910Amendment | Aug 24, 2007 | Aug 24, 2007 | Quicksilver Resources Inc. | Colonel Flagg Unit #3HH | 9,000 | 22131463 |
| 644903 | Aug 24, 2007 | Aug 24, 2007 | Quicksilver Resources Inc. | Hawkeye Unit #3HH | 9,000 | 22131462 |
| 644750 | Aug 24, 2007 | Aug 24, 2007 | Quicksilver Resources Inc. | Zbar Land & Cattle Co. Unit #3HH | 9,000 | 22131464 |
| 644750Amendment | Aug 24, 2007 | Aug 24, 2007 | Quicksilver Resources Inc. | Zbar Land & Cattle Co. Unit #3HH | 9,000 | 22131464 |
| 644747 | Aug 22, 2007 | Aug 22, 2007 | Quicksilver Resources Inc. | Zbar Land & Cattle Co. Unit #2HH | 9,000 | 22131461 |
| 644747Amendment | Aug 22, 2007 | Aug 22, 2007 | Quicksilver Resources Inc. | Zbar Land & Cattle Co. Unit #2HH | 9,000 | 22131461 |
| 644684 | Aug 22, 2007 | Aug 22, 2007 | Encana Oil & Gas(usa) Inc. | Slocum #5HH | 9,000 | 22131460 |
| 644684Amendment | Aug 22, 2007 | Aug 22, 2007 | Encana Oil & Gas(usa) Inc. | Slocum #5HH | 9,000 | 22131460 |
| 644662 | Aug 21, 2007 | Aug 21, 2007 | Range Production Company | Mitchell Ranch #32HH | 9,000 | 22131459 |
| 644661 | Aug 21, 2007 | Aug 21, 2007 | Range Production Company | Mitchell Ranch #31HH | 9,000 | 22131458 |
| 644303 | Aug 16, 2007 | Aug 16, 2007 | Quicksilver Resources Inc. | Yosemite Sam Unit #8HH | 9,000 | 22131456 |
| 644303Amendment | Aug 16, 2007 | Aug 16, 2007 | Quicksilver Resources Inc. | Yosemite Sam Unit #8HH | 9,000 | 22131456 |
| 644302 | Aug 16, 2007 | Aug 16, 2007 | Quicksilver Resources Inc. | Yosemite Sam Unit #7HH | 9,000 | 22131454 |
| 643989 | Aug 11, 2007 | Aug 11, 2007 | Quicksilver Resources Inc. | Stetson Massey Unit #1HH | 6,400 | 22131453 |
| 643975 | Aug 11, 2007 | Aug 11, 2007 | Quicksilver Resources Inc. | Stetson Massey Unit #5HH | 9,000 | 22131449 |
| 643973 | Aug 11, 2007 | Aug 11, 2007 | Quicksilver Resources Inc. | Stetson Massey Unit #4HH | 9,000 | 22131450 |
| 643970 | Aug 11, 2007 | Aug 11, 2007 | Quicksilver Resources Inc. | Stetson Massey Unit #3HH | 9,000 | 22131451 |
| 643970Amendment | Aug 11, 2007 | Aug 11, 2007 | Quicksilver Resources Inc. | Stetson Massey Unit #3HH | 9,000 | 22131451 |
| 643969 | Aug 11, 2007 | Aug 11, 2007 | Quicksilver Resources Inc. | Stetson Massey Unit #2HH | 9,000 | 22131452 |
| 643969Amendment | Aug 11, 2007 | Aug 11, 2007 | Quicksilver Resources Inc. | Stetson Massey Unit #2HH | 9,000 | 22131452 |
| 643953 | Aug 10, 2007 | Aug 10, 2007 | EOG Resources, Inc. | Black Ranch #9HH | 6,400 | 22131448 |
| 636755Amendment | Aug 10, 2007 | Aug 10, 2007 | XTO Energy Inc. | Barnes Trust Unit #1HH | 11,000 | 22131352 |
| 643610 | Aug 8, 2007 | Aug 8, 2007 | Quicksilver Resources Inc. | Ted and Roy Unit #2HH | 9,000 | 22131447 |
| 643290 | Aug 8, 2007 | Aug 8, 2007 | Quicksilver Resources Inc. | Ted & Roy Unit #1HH | 9,000 | 22131444 |
| 643184 | Aug 8, 2007 | Aug 8, 2007 | Quicksilver Resources Inc. | Campos Unit A #5HH | 9,000 | 22131437 |
| 643502 | Aug 7, 2007 | Aug 7, 2007 | EOG Resources, Inc. | Branch Farms #3HH | 5,600 | 22131446 |
| 643502Amendment | Aug 7, 2007 | Aug 7, 2007 | EOG Resources, Inc. | Branch Farms #3HH | 5,600 | 22131446 |
| 641582 | Aug 7, 2007 | Aug 7, 2007 | Range Production Company | Mitchell Ranch #39HH | 9,000 | 22131429 |
| 643298 | Aug 6, 2007 | Aug 6, 2007 | EOG Resources, Inc. | Branch Farms #2HH | 5,700 | 22131445 |
| 643231 | Aug 4, 2007 | Aug 4, 2007 | Carrizo Oil & Gas, Inc. | Turney #3HH | 7,500 | 22131443 |
| 643197 | Aug 4, 2007 | Aug 4, 2007 | Carrizo Oil & Gas, Inc. | Turney #2HH | 7,500 | 22131441 |
| 643196 | Aug 4, 2007 | Aug 4, 2007 | Carrizo Oil & Gas, Inc. | Turney #1HH | 7,500 | 22131442 |
| 643188 | Aug 3, 2007 | Aug 3, 2007 | Quicksilver Resources Inc. | Campos Unit B #6HH | 9,000 | 22131440 |
| 643186 | Aug 3, 2007 | Aug 3, 2007 | Quicksilver Resources Inc. | Campos Unit B #5HH | 9,000 | 22131439 |
| 643185 | Aug 3, 2007 | Aug 3, 2007 | Quicksilver Resources Inc. | Campos Unit A #6HH | 9,000 | 22131438 |
| 642679 | Jul 27, 2007 | Jul 27, 2007 | Range Production Company | Mitchell Ranch #28HH | 9,000 | 22131436 |
| 642678 | Jul 27, 2007 | Jul 27, 2007 | Range Production Company | Mitchell Ranch #17HH | 9,000 | 22131434 |
| 642677 | Jul 27, 2007 | Jul 27, 2007 | Range Production Company | Mitchell Ranch #16HH | 9,000 | 22131435 |