| 649841Amendment | Dec 28, 2007 | Dec 28, 2007 | Evolution Operating Co., Inc. | Margaret #1REH | 13,000 | 14932659 |
| 650654 | Dec 11, 2007 | Dec 11, 2007 | Calloway Engineering, LLC | Rocky #1 | 7,000 | 14933186 |
| 647507 | Nov 8, 2007 | Nov 8, 2007 | Evolution Operating Co., Inc. | Donella #1HRH | 12,500 | 14932786 |
| 647701 | Oct 17, 2007 | Oct 17, 2007 | Geosouthern Energy Corporation | Shepard, John W. H-RE #1H | 18,000 | 14933096 |
| 647667 | Oct 17, 2007 | Oct 17, 2007 | Geosouthern Energy Corporation | Star #1 | 5,400 | 14930968 |
| 644289 | Aug 15, 2007 | Aug 15, 2007 | Txco Resources Inc. | Cherry Oil Unit #1HH | 11,000 | 14933185 |
| 644289Amendment | Aug 15, 2007 | Aug 15, 2007 | Txco Resources Inc. | Cherry Oil Unit #1HH | 10,000 | 14933185 |
| 642024 | Jul 16, 2007 | Jul 16, 2007 | Chaparral Natural Resources,inc. | Ephesians #1REH | 8,300 | 14931825 |
| 637551 | Apr 30, 2007 | Apr 30, 2007 | Sellers Lease Service, Inc. | Fannie Mae Unit #1 | 4,000 | 14933183 |
| 637306 | Apr 24, 2007 | Apr 24, 2007 | Magnum Producing, LP | Kaiser #1HH | 8,500 | 14931311 |
| 635556 | Mar 27, 2007 | Mar 27, 2007 | Leexus Oil & Gas L.L.P. | Marcy Ellen #1W | 4,100 | 14933182 |
| 630726 | Feb 27, 2007 | Feb 27, 2007 | Leexus Oil & Gas L.L.P. | Petrich "A" #2 | 5,300 | 14932371 |
| 631938 | Jan 19, 2007 | Jan 19, 2007 | Geosouthern Energy Corporation | Kathryn Kaltenbach #1AH | 12,000 | 14932039 |
| 631938Amendment | Jan 19, 2007 | Jan 19, 2007 | Geosouthern Energy Corporation | Kaltenbach, Kathryn #1AH | 12,000 | 14932039 |
| 631507 | Jan 9, 2007 | Jan 9, 2007 | Weber Energy Corporation | Derry #1 | 6,800 | 14933181 |
| 628702 | Nov 9, 2006 | Nov 9, 2006 | McA Petroleum Corporation | Steinhauser-Bishop Gas Unit #1 | 2,000 | 14933180 |
| 628702Amendment | Nov 9, 2006 | Nov 9, 2006 | McA Petroleum Corporation | Steinhauser-Bishop Gas Unit #1 | 2,180 | 14933180 |
| 628636 | Nov 9, 2006 | Nov 9, 2006 | McA Petroleum Corporation | Weidel, Fred #7 | 2,300 | 14933179 |
| 627445 | Nov 9, 2006 | Nov 9, 2006 | McA Petroleum Corporation | Standard Trust #14 | 2,275 | 14933178 |
| 627050 | Oct 31, 2006 | Oct 31, 2006 | Atasca Resources, Inc. | Von Rosenberg #1HH | 10,566 | 14930756 |
| 627449 | Oct 13, 2006 | Oct 13, 2006 | McA Petroleum Corporation | Drenner #22 | 2,350 | 14933177 |
| 625239 | Oct 3, 2006 | Oct 3, 2006 | Texas Vanguard Oil Company | Stuermer Heirs #1 | 5,650 | 14933174 |
| 626759 | Sep 29, 2006 | Sep 29, 2006 | Anadarko E&P Company LP | Eva Marie Unit #1REH | 15,423 | 14932081 |
| 626759Amendment | Sep 29, 2006 | Sep 29, 2006 | Anadarko E&P Company LP | Eva Marie Unit #1REH | 15,423 | 14932081 |
| 626759Amendment | Sep 29, 2006 | Sep 29, 2006 | Anadarko E&P Company LP | Eva Marie Unit #1REH | 15,423 | 14932081 |
| 626504 | Sep 25, 2006 | Sep 25, 2006 | Marathon Oil Company | Schoenberg #1H | 14,450 | 14933176 |
| 626504Amendment | Sep 25, 2006 | Sep 25, 2006 | Marathon Oil Company | Schoenberg #1H | 14,450 | 14933176 |
| 626502 | Sep 25, 2006 | Sep 25, 2006 | Marathon Oil Company | Wolf #1H | 14,450 | 14933175 |
| 626502Amendment | Sep 25, 2006 | Sep 25, 2006 | Marathon Oil Company | Wolf #1H | 14,450 | 14933175 |
| 625760 | Sep 12, 2006 | Sep 12, 2006 | Anadarko E&P Company LP | Foerster-Donovan Unit #1REH | 9,600 | 14932617 |
| 625760Amendment | Sep 12, 2006 | Sep 12, 2006 | Enervest Operating, L.L.C. | Foerster-Donovan Unit #1REH | 13,000 | 14932617 |
| 620660 | Aug 4, 2006 | Aug 4, 2006 | Leexus Oil & Gas L.L.P. | Ansell-Lehmann #1HH | 11,999 | 14930545 |
| 620679 | Jun 23, 2006 | Jun 23, 2006 | DNR Energy Company, LLC | Johnston, H. #1 | 320 | 14933172 |
| 621405 | Jun 22, 2006 | Jun 22, 2006 | United Resources LP | Maya #1 | 16,500 | 14933173 |
| 621405Amendment | Jun 22, 2006 | Jun 22, 2006 | United Resources LP | Maya #1 | 16,500 | 14933173 |
| 621405Amendment | Jun 22, 2006 | Jun 22, 2006 | United Resources LP | Maya #1H | 16,500 | 14933173 |
| 619322 | May 18, 2006 | May 18, 2006 | Emerald Operating Company, Inc. | McMurry Unit #1REH | 12,500 | 14932909 |
| 616615 | Apr 21, 2006 | Apr 21, 2006 | Emerald Operating Company, Inc. | Roznov #1H | 12,500 | 14932861 |
| 617258 | Apr 10, 2006 | Apr 10, 2006 | Jensen Operating Co, Inc. of TX | Barcak #2 | 5,500 | 14933171 |
| 617257 | Apr 10, 2006 | Apr 10, 2006 | Jensen Operating Co, Inc. of TX | Barcak #1 | 5,500 | 14933170 |
| 617120 | Apr 6, 2006 | Apr 6, 2006 | TDC Engineering, Inc. | Schultz, W. OL #1HH | 10,700 | 14933169 |
| 616875 | Apr 3, 2006 | Apr 3, 2006 | Weber Energy Corporation | Arnim Estate #1 | 6,800 | 14933168 |
| 616874 | Apr 3, 2006 | Apr 3, 2006 | Weber Energy Corporation | Paulus Estate #1 | 6,800 | 14933167 |
| 616874Amendment | Apr 3, 2006 | Apr 3, 2006 | Weber Energy Corporation | Paulus Estate #1 | 6,800 | 14933167 |
| 616309 | Mar 23, 2006 | Mar 23, 2006 | Anadarko E&P Company LP | Pyburn-Zoch "A" #1REH | 9,000 | 14932516 |
| 614802 | Mar 22, 2006 | Mar 22, 2006 | Emerald Operating Company, Inc. | Schmidt #1REH | 12,000 | 14931891 |
| 616002 | Mar 17, 2006 | Mar 17, 2006 | Leexus Oil & Gas L.L.P. | Solis, Barbara #1W | 6,000 | 14933166 |
| 616002Amendment | Mar 17, 2006 | Mar 17, 2006 | Leexus Oil & Gas L.L.P. | Solis, Barbara #1W | 6,000 | 14933166 |
| 615517 | Mar 10, 2006 | Mar 10, 2006 | Chaparral Energy, L.L.C. | Barracuda #2 | 10,500 | 14933165 |
| 615517Amendment | Mar 10, 2006 | Mar 10, 2006 | Chaparral Energy, L.L.C. | Barracuda Unit #2 | 10,500 | 14933165 |
| 615480 | Mar 8, 2006 | Mar 8, 2006 | Weber Energy Corporation | Huff #1 | 6,600 | 14933164 |
| 615468 | Mar 8, 2006 | Mar 8, 2006 | Weber Energy Corporation | Rodriguez #1 | 6,600 | 14933163 |
| 615468Amendment | Mar 8, 2006 | Mar 8, 2006 | Geosouthern Energy Corporation | Rodriguez #1 | 6,600 | 14933163 |
| 613915 | Feb 9, 2006 | Feb 9, 2006 | Magnum Producing, LP | Lena #1H | 14,000 | 14932424 |
| 613906 | Feb 9, 2006 | Feb 9, 2006 | Leexus Oil & Gas L.L.P. | Solis, Barbara #1 | 6,000 | 14933162 |
| 611780 | Jan 5, 2006 | Jan 5, 2006 | Leexus Oil & Gas L.L.P. | Grace #2W | 6,000 | 14933161 |
| 611869 | Jan 4, 2006 | Jan 4, 2006 | Anadarko E&P Company LP | Ephraim Unit #1REH | 9,000 | 14932073 |
| 611284 | Dec 20, 2005 | Dec 20, 2005 | N. A. Energy, Inc. | Pavlicek Unit #1 | 9,400 | 14933160 |
| 607525 | Oct 10, 2005 | Oct 10, 2005 | McA Petroleum Corporation | Drenner, Mary Huff #21 | 2,255 | 14933159 |
| 607522 | Oct 7, 2005 | Oct 7, 2005 | McA Petroleum Corporation | Drenner, Mary Huff #20 | 2,265 | 14933158 |
| 606373 | Oct 6, 2005 | Oct 6, 2005 | McA Petroleum Corporation | Steinhauser-Bishop Unit #2 | 2,260 | 14933156 |
| 606200 | Oct 6, 2005 | Oct 6, 2005 | Sellers Lease Service, Inc. | Tupa - Price Unit #1 | 2,375 | 14933155 |
| 606375 | Sep 15, 2005 | Sep 15, 2005 | McA Petroleum Corporation | Herbert, et Al #4 | 1,970 | 14933157 |
| 606285 | Sep 14, 2005 | Sep 14, 2005 | Patterson Petroleum LP | Baumbach #1 | 13,150 | 14932353 |
| 606285Amendment | Sep 14, 2005 | Sep 14, 2005 | Patterson Petroleum LP | Baumbach #1 | 13,300 | 14932353 |
| 605819 | Sep 7, 2005 | Sep 7, 2005 | Indexgeo & Associates, Inc. | Hajovsky Gas Unit #1 | 6,500 | 14933154 |
| 605560 | Aug 31, 2005 | Aug 31, 2005 | Anadarko E&P Company LP | Delilah #2REH | 10,500 | 14931651 |
| 604616 | Aug 12, 2005 | Aug 12, 2005 | Leexus Oil & Gas L.L.P. | Petrich - Lorenz #1 | 6,000 | 14933153 |
| 602796 | Jun 30, 2005 | Jun 30, 2005 | Geonatural Resources, Inc. | Geo-Wilcox #1A | 6,000 | 14933152 |
| 602416 | Jun 22, 2005 | Jun 22, 2005 | Anadarko E&P Company LP | Oeding #1REH | 9,000 | 14932296 |
| 602416Amendment | Jun 22, 2005 | Jun 22, 2005 | Anadarko E&P Company LP | Oeding #1REH | 9,000 | 14932296 |
| 601776 | Jun 9, 2005 | Jun 9, 2005 | Geonatural Resources, Inc. | Geo-Wilcox #4 | 6,500 | 14933146 |
| 601775 | Jun 9, 2005 | Jun 9, 2005 | Geonatural Resources, Inc. | Geo-Wilcox #3 | 6,500 | 14933144 |
| 601773 | Jun 9, 2005 | Jun 9, 2005 | Geonatural Resources, Inc. | Geo-Wilcox #2A | 6,500 | 14933141 |
| 601771 | Jun 9, 2005 | Jun 9, 2005 | Geonatural Resources, Inc. | Geo-Wilcox #1 | 6,500 | 14933137 |
| 600480 | May 10, 2005 | May 10, 2005 | Leexus Oil & Gas L.L.P. | Atlanta Hatfield #1HH | 8,500 | 14930991 |
| 558278 | Mar 24, 2005 | Mar 24, 2005 | Anadarko E&P Company LP | Jones #2REH | 12,500 | 14931983 |
| 558278Amendment | Mar 24, 2005 | Mar 24, 2005 | Anadarko E&P Company LP | Jones #2REH | 12,500 | 14931983 |
| 559382 | Mar 23, 2005 | Mar 23, 2005 | U. S. Operating, Inc. | Basden #1REH | 10,475 | 14932576 |
| 558461 | Mar 3, 2005 | Mar 3, 2005 | Geonatural Resources, Inc. | Geo-Navarro #1 | 6,500 | 14933151 |
| 557122 | Mar 3, 2005 | Mar 3, 2005 | Marathon Oil Company | Margaret Hays #1H | 10,300 | 14931638 |
| 556701 | Feb 18, 2005 | Feb 18, 2005 | U. S. Operating, Inc. | Rauch #1REH | 11,000 | 14931941 |
| 557861 | Feb 17, 2005 | Feb 17, 2005 | Anadarko E&P Company LP | Munson-Oeding Unit #1REH | 9,900 | 14932545 |
| 556787 | Jan 26, 2005 | Jan 26, 2005 | Anadarko E&P Company LP | Larue #1REH | 11,000 | 14932491 |
| 556787Amendment | Jan 26, 2005 | Jan 26, 2005 | Anadarko E&P Company LP | Svec Oil Unit 1 #2H | 11,000 | 14932491 |
| 554079 | Nov 24, 2004 | Nov 24, 2004 | Geonatural Resources, Inc. | Geo-Wilcox #5 | 5,500 | 14933150 |
| 554078 | Nov 24, 2004 | Nov 24, 2004 | Anadarko E&P Company LP | Schultz-Moerbe Unit #1REH | 10,100 | 14932666 |
| 554002 | Nov 22, 2004 | Nov 22, 2004 | WCS Oil and Gas Corporation | Noack Unit #1REH | 9,000 | 14932599 |
| 554002Amendment | Nov 22, 2004 | Nov 22, 2004 | WCS Oil & Gas Corporation | Noack Unit #1REH | 9,500 | 14932599 |
| 553311 | Nov 8, 2004 | Nov 8, 2004 | Anadarko E&P Company LP | Buscha-Hemple Unit #1REH | 10,500 | 14932425 |
| 552760 | Nov 3, 2004 | Nov 3, 2004 | McA Petroleum Corporation | Steinhauser-Bishop Unit #1 | 2,350 | 14933149 |
| 551798 | Oct 27, 2004 | Oct 27, 2004 | Marathon Oil Company | Goldapp #10H | 8,605 | 14932615 |
| 551798Amendment | Oct 27, 2004 | Oct 27, 2004 | Marathon Oil Company | Goldapp #10H | 11,842 | 14932615 |
| 551419 | Sep 23, 2004 | Sep 23, 2004 | Marathon Oil Company | Goldapp #5H | 8,605 | 14932419 |
| 551419Amendment | Sep 23, 2004 | Sep 23, 2004 | Marathon Oil Company | Goldapp #5H | 13,081 | 14932419 |
| 550132 | Aug 30, 2004 | Aug 30, 2004 | Browning Oil Company, Inc. | Freeman, D A #6HH | 6,000 | 14933148 |
| 549785 | Aug 19, 2004 | Aug 19, 2004 | Geonatural Resources, Inc. | Geo-Adams #1 | 6,000 | 14933147 |
| 549785Amendment | Aug 19, 2004 | Aug 19, 2004 | Geonatural Resources, Inc. | Geo-Shereda #1 | 6,000 | 14933147 |
| 549723 | Aug 18, 2004 | Aug 18, 2004 | Geonatural Resources, Inc. | Geo-Wilcox #4 | 6,000 | 14933146 |
| 549307 | Aug 9, 2004 | Aug 9, 2004 | Browning Oil Company, Inc. | Nana Unit #2REH | 10,500 | 14931940 |