| 617201Amendment | Apr 14, 2006 | Apr 14, 2006 | XTO Energy Inc. | Limestone | Morton No. 1 Gas Unit #2029331818 | 13,200 |
| 617174 | Apr 14, 2006 | Apr 14, 2006 | XTO Energy Inc. | Freestone | Newsome, C. A. Estate #9R16133540 | 13,500 |
| 617529 | Apr 13, 2006 | Apr 13, 2006 | XTO Energy Inc. | Tarrant | Manning Trwd Unit #2HH43931588 | 11,000 |
| 617529Amendment | Apr 13, 2006 | Apr 13, 2006 | XTO Energy Inc. | Tarrant | Manning Trwd B Unit #2HH43931588 | 11,000 |
| 617519 | Apr 13, 2006 | Apr 13, 2006 | XTO Energy Inc. | Tarrant | Manning Trwd Unit #3HH43931587 | 10,500 |
| 617519Amendment | Apr 13, 2006 | Apr 13, 2006 | XTO Energy Inc. | Tarrant | Manning Trwd C Unit #3HH43931587 | 10,500 |
| 617498 | Apr 12, 2006 | Apr 12, 2006 | XTO Energy Inc. | Johnson | Winnett Unit #1HH25130924 | 10,000 |
| 617498Amendment | Apr 12, 2006 | Apr 12, 2006 | XTO Energy Inc. | Johnson | Winnett Unit #1HH25130924 | 10,000 |
| 617498Amendment | Apr 12, 2006 | Apr 12, 2006 | XTO Energy Inc. | Johnson | Winnett Unit #1HH25130924 | 10,000 |
| 617456 | Apr 12, 2006 | Apr 12, 2006 | XTO Energy Inc. | Johnson | Jimenez Unit #1HH25130922 | 11,000 |
| 617456Amendment | Apr 12, 2006 | Apr 12, 2006 | XTO Energy Inc. | Johnson | Jimenez Unit #1HH25130922 | 11,000 |
| 617455 | Apr 12, 2006 | Apr 12, 2006 | XTO Energy Inc. | Tarrant | Birdsong #1HH43931586 | 11,500 |
| 617455Amendment | Apr 12, 2006 | Apr 12, 2006 | XTO Energy Inc. | Tarrant | Birdsong #1HH43931586 | 11,500 |
| 617428 | Apr 12, 2006 | Apr 12, 2006 | XTO Energy Inc. | Gaines | Foster #916536558 | 11,900 |
| 617171 | Apr 12, 2006 | Apr 12, 2006 | XTO Energy Inc. | Limestone | Loftin Creek Gas Unit #229331817 | 13,800 |
| 617168 | Apr 12, 2006 | Apr 12, 2006 | XTO Energy Inc. | Ector | Goldsmith San Andres Unit #165213539079 | 6,000 |
| 617168Amendment | Apr 12, 2006 | Apr 12, 2006 | XTO Energy Inc. | Ector | Goldsmith San Andres Unit #165213539079 | 6,000 |
| 617323 | Apr 11, 2006 | Apr 11, 2006 | XTO Energy Inc. | Tarrant | Summers #1HH43931584 | 11,000 |
| 617323Amendment | Apr 11, 2006 | Apr 11, 2006 | XTO Energy Inc. | Tarrant | Summers Unit #1HH43931584 | 11,000 |
| 617323Amendment | Apr 11, 2006 | Apr 11, 2006 | XTO Energy Inc. | Tarrant | Summers Unit #1HH43931584 | 11,000 |
| 617162 | Apr 11, 2006 | Apr 11, 2006 | XTO Energy Inc. | Limestone | Crider Gas Unit #329331816 | 13,200 |
| 617159 | Apr 11, 2006 | Apr 11, 2006 | XTO Energy Inc. | Freestone | Bailey Gas Unit 'A' #1716133534 | 14,800 |
| 617159Amendment | Apr 11, 2006 | Apr 11, 2006 | XTO Energy Inc. | Freestone | Bailey Gas Unit 'A' #1716133534 | 14,800 |
| 617157 | Apr 11, 2006 | Apr 11, 2006 | XTO Energy Inc. | Freestone | Bailey Gas Unit 'A' #1616133533 | 14,800 |
| 617157Amendment | Apr 11, 2006 | Apr 11, 2006 | XTO Energy Inc. | Freestone | Bailey Gas Unit 'A' #1616133533 | 14,800 |
| 617034 | Apr 11, 2006 | Apr 11, 2006 | XTO Energy Inc. | Robertson | Steele Gas Unit #239531130 | 16,500 |
| 617032 | Apr 11, 2006 | Apr 11, 2006 | XTO Energy Inc. | Robertson | Steakley Gas Unit #739531129 | 15,500 |
| 617031 | Apr 11, 2006 | Apr 11, 2006 | XTO Energy Inc. | Limestone | Loftin Creek Gas Unit #129331814 | 13,800 |
| 616877 | Apr 7, 2006 | Apr 7, 2006 | XTO Energy Inc. | Freestone | Bell Gas Unit #1316134125 | 12,300 |
| 616872 | Apr 7, 2006 | Apr 7, 2006 | XTO Energy Inc. | Freestone | Bell Gas Unit #1216134584 | 13,600 |
| 616803 | Apr 7, 2006 | Apr 7, 2006 | XTO Energy Inc. | Freestone | Bailey Gas Unit 'A' #1516133524 | 14,800 |
| 616050 | Apr 7, 2006 | Apr 7, 2006 | XTO Energy Inc. | Tarrant | Knapp Unit #1HH43931559 | 11,000 |
| 616050Amendment | Apr 7, 2006 | Apr 7, 2006 | XTO Energy Inc. | Tarrant | Knapp Unit #1HH43931559 | 11,000 |
| 616050Amendment | Apr 7, 2006 | Apr 7, 2006 | XTO Energy Inc. | Tarrant | Knapp Unit #1HH43931559 | 10,000 |
| 612525 | Apr 7, 2006 | Apr 7, 2006 | XTO Energy Inc. | Freestone | Pillans #116133462 | 10,950 |
| 612525Amendment | Apr 7, 2006 | Apr 7, 2006 | XTO Energy Inc. | Freestone | Pillans Gas Unit #116133462 | 10,900 |
| 616806 | Apr 5, 2006 | Apr 5, 2006 | XTO Energy Inc. | Robertson | Skiles #139531128 | 17,000 |
| 616654 | Apr 4, 2006 | Apr 4, 2006 | XTO Energy Inc. | Freestone | Bailey Gas Unit 'A' #1016133521 | 14,800 |
| 616648 | Apr 4, 2006 | Apr 4, 2006 | XTO Energy Inc. | Limestone | Heaton No. 1 Gas Unit #1929331812 | 13,200 |
| 616647 | Apr 4, 2006 | Apr 4, 2006 | XTO Energy Inc. | Robertson | Sanders Gas Unit #139531127 | 16,000 |
| 616646 | Apr 4, 2006 | Apr 4, 2006 | XTO Energy Inc. | Limestone | S. J. Harlow Gas Unit #829331811 | 13,300 |
| 616581 | Apr 4, 2006 | Apr 4, 2006 | XTO Energy Inc. | Freestone | Brice Knight, Jr. Gas Unit #216133519 | 13,000 |
| 616059 | Apr 4, 2006 | Apr 4, 2006 | XTO Energy Inc. | Parker | Walsh Ranch West #M 3HH36733976 | 8,900 |
| 616059Amendment | Apr 4, 2006 | Apr 4, 2006 | XTO Energy Inc. | Parker | Walsh Ranch West #M 3HH36733976 | 8,900 |
| 616886 | Apr 3, 2006 | Apr 3, 2006 | XTO Energy Inc. | Tarrant | Horn Hillingsworth Unit #1HH43931578 | 13,000 |
| 616886Amendment | Apr 3, 2006 | Apr 3, 2006 | XTO Energy Inc. | Tarrant | Horn Hillingsworth Unit #1HH43931578 | 13,000 |
| 616885 | Apr 3, 2006 | Apr 3, 2006 | XTO Energy Inc. | Parker | Walsh Ranch West #C 2HH36733975 | 8,900 |
| 616885Amendment | Apr 3, 2006 | Apr 3, 2006 | XTO Energy Inc. | Parker | Walsh Ranch West #C 2HH36733975 | 8,900 |
| 616884 | Apr 3, 2006 | Apr 3, 2006 | XTO Energy Inc. | Parker | William Bradbury #1HH36733974 | 8,900 |
| 616884Amendment | Apr 3, 2006 | Apr 3, 2006 | XTO Energy Inc. | Parker | Bradbury, William #1HH36733974 | 8,900 |
| 616883 | Apr 3, 2006 | Apr 3, 2006 | XTO Energy Inc. | Johnson | Kimbrough Dunlap #4HH25130894 | 12,000 |
| 616882 | Apr 3, 2006 | Apr 3, 2006 | XTO Energy Inc. | Johnson | Harper Cattle #B 16AHH25130893 | 12,000 |
| 616882Amendment | Apr 3, 2006 | Apr 3, 2006 | XTO Energy Inc. | Johnson | Harper Cattle #B 16HH25130893 | 12,000 |
| 616882Amendment | Apr 3, 2006 | Apr 3, 2006 | XTO Energy Inc. | Johnson | Harper Cattle #B 16AHH25130893 | 12,000 |
| 616881 | Apr 3, 2006 | Apr 3, 2006 | XTO Energy Inc. | Johnson | Harper Cattle #B 9HH25130892 | 12,000 |
| 616880 | Apr 3, 2006 | Apr 3, 2006 | XTO Energy Inc. | Tarrant | Walsh Ranch West #T 4HH43931577 | 8,900 |
| 616880Amendment | Apr 3, 2006 | Apr 3, 2006 | XTO Energy Inc. | Tarrant | Walsh Ranch West #T 4HH43931577 | 8,900 |
| 616418 | Apr 3, 2006 | Apr 3, 2006 | XTO Energy Inc. | Tarrant | Union Pacific #2HH43931564 | 11,000 |
| 616855 | Mar 31, 2006 | Mar 31, 2006 | XTO Energy Inc. | Johnson | Weatherby Unit #1HH25130891 | 13,000 |
| 616855Amendment | Mar 31, 2006 | Mar 31, 2006 | XTO Energy Inc. | Johnson | Weatherby Unit #1HH25130891 | 13,000 |
| 616816 | Mar 31, 2006 | Mar 31, 2006 | XTO Energy Inc. | Tarrant | City of Fort Worth South Unit #3HH43931575 | 11,000 |
| 616816Amendment | Mar 31, 2006 | Mar 31, 2006 | XTO Energy Inc. | Tarrant | City of Fort Worth South Unit #3HH43931575 | 11,000 |
| 616815 | Mar 31, 2006 | Mar 31, 2006 | XTO Energy Inc. | Tarrant | City of Fort Worth South Unit #1HH43931574 | 11,000 |
| 616815Amendment | Mar 31, 2006 | Mar 31, 2006 | XTO Energy Inc. | Tarrant | City of Fort Worth South Unit #1HH43931574 | 11,000 |
| 616810 | Mar 31, 2006 | Mar 31, 2006 | XTO Energy Inc. | Tarrant | Mission D Unit #2HH43931576 | 11,000 |
| 616810Amendment | Mar 31, 2006 | Mar 31, 2006 | XTO Energy Inc. | Tarrant | Mission D Unit #2HH43931576 | 11,000 |
| 616707 | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Tarrant | South Park Unit #1HH43931568 | 11,000 |
| 616707Amendment | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Tarrant | South Park Unit #1HH43931568 | 11,000 |
| 616705 | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Johnson | Harper Cattle #B 7AHH25130883 | 11,000 |
| 616704 | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Tarrant | Brants #4HH43931567 | 11,000 |
| 616704Amendment | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Tarrant | Brants #4HH43931567 | 11,000 |
| 616704Amendment | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Tarrant | Brants #4HH43931567 | 11,000 |
| 616703 | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Parker | Byrd #D 1HH36733971 | 8,900 |
| 616703Amendment | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Parker | Byrd #D 1HH36733971 | 8,900 |
| 616701 | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Johnson | Roof #1HH25130881 | 11,000 |
| 616701Amendment | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Johnson | Roof #1HH25130881 | 11,000 |
| 616535 | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Houston | Temple-Eastex Leonard #3HH22531068 | 11,000 |
| 616535Amendment | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Houston | Temple-Eastex Leonard #3HH22531068 | 11,000 |
| 616534 | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Freestone | C. E. Turner Gas Unit No. 2 #416133517 | 12,300 |
| 616534Amendment | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Freestone | C. E. Turner Gas Unit No. 2 #416133517 | 12,300 |
| 616529 | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Freestone | Hugh D. Whitaker Gas Unit #616133515 | 14,500 |
| 616529Amendment | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Freestone | Hugh D. Whitaker Gas Unit II #216133515 | 14,500 |
| 616529Amendment | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Freestone | Hugh D. Whitaker Gas Unit II #216133515 | 14,500 |
| 616337 | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Freestone | Hugh D. Whitaker Gas Unit #316133514 | 14,500 |
| 616337Amendment | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Freestone | Hugh D. Whitaker Gas Unit #116133514 | 14,500 |
| 616292 | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Limestone | Reed "R" No. 1 Unit #529331624 | 13,300 |
| 616289 | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Limestone | Goldbeck Gas Unit #229331808 | 14,200 |
| 616287 | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Freestone | T. C. Oakes Estate Gas Unit #716133513 | 13,700 |
| 616284 | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Limestone | J. A. Gilliam Gas Unit #1616134160 | 13,100 |
| 616284Amendment | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Freestone | J. A. Gilliam Gas Unit #1616134160 | 13,100 |
| 616278 | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Freestone | Dobbs Gas Unit #616133509 | 9,900 |
| 616278Amendment | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Freestone | Dobbs Gas Unit #616133509 | 9,900 |
| 614870 | Mar 30, 2006 | Mar 30, 2006 | XTO Energy Inc. | Johnson | Harper Cattle #B 6HH25130882 | 11,000 |
| 616500 | Mar 29, 2006 | Mar 29, 2006 | XTO Energy Inc. | Gaines | Russell Clearfork Unit #44016536540 | 8,950 |
| 616497 | Mar 29, 2006 | Mar 29, 2006 | XTO Energy Inc. | Gaines | Russell Clearfork Unit #31616536541 | 8,950 |
| 616497Amendment | Mar 29, 2006 | Mar 29, 2006 | XTO Energy Inc. | Gaines | Russell Clearfork Unit #31616536541 | 8,950 |
| 616290 | Mar 29, 2006 | Mar 29, 2006 | XTO Energy Inc. | Limestone | Sand Branch Gas Unit #229331809 | 14,200 |
| 616141 | Mar 28, 2006 | Mar 28, 2006 | XTO Energy Inc. | Gaines | Russell (Clearfork 7000) Unit #32016536539 | 8,900 |
| 616122 | Mar 28, 2006 | Mar 28, 2006 | XTO Energy Inc. | Limestone | Sand Branch Gas Unit #129331806 | 14,200 |
| 616121 | Mar 28, 2006 | Mar 28, 2006 | XTO Energy Inc. | Freestone | Cagle Gas Unit #1516133508 | 12,900 |