| 690209 | Jan 27, 2010 | Jan 27, 2010 | Enervest Operating, L.L.C. | Fayette | Holmes Ranch "A" #2REH | 12,000 | 14932813 |
| 686894 | Jan 5, 2010 | Jan 5, 2010 | Enervest Operating, L.L.C. | Washington | Schulte #2REH | 14,200 | 47730885 |
| 686894Amendment | Jan 5, 2010 | Jan 5, 2010 | Enervest Operating, L.L.C. | Washington | Schulte #2REH | 14,200 | 47730885 |
| 687870 | Nov 24, 2009 | Nov 24, 2009 | Enervest Operating, L.L.C. | Fayette | Bauer Unit #1REH | 13,000 | 14932937 |
| 686245 | Nov 20, 2009 | Nov 20, 2009 | Enervest Operating, L.L.C. | Grimes | Cannon Unit #1REH | 10,993 | 18530516 |
| 686651 | Oct 28, 2009 | Oct 28, 2009 | Enervest Operating, L.L.C. | Brazos | Olden-Paull Unit #1REH | 13,000 | 04131643 |
| 684721 | Sep 11, 2009 | Sep 11, 2009 | Enervest Operating, L.L.C. | Washington | B. Meyer Unit #1REH | 15,000 | 47730813 |
| 684572 | Aug 28, 2009 | Aug 28, 2009 | Enervest Operating, L.L.C. | Brazos | Steephollow Unit #1REH | 11,500 | 04131916 |
| 684572Amendment | Aug 28, 2009 | Aug 28, 2009 | Enervest Operating, L.L.C. | Brazos | Steephollow Unit #1REH | 13,490 | 04131916 |
| 684250 | Aug 19, 2009 | Aug 19, 2009 | Enervest Operating, L.L.C. | Brazos | Westlands #1REH | 13,000 | 04131840 |
| 684250Amendment | Aug 19, 2009 | Aug 19, 2009 | Enervest Operating, L.L.C. | Brazos | Westlands #1REH | 13,000 | 04131840 |
| 684159 | Aug 19, 2009 | Aug 19, 2009 | Enervest Operating, L.L.C. | Fayette | Cruse-Lehmann Unit #1RE | 9,000 | 14932456 |
| 683119 | Aug 11, 2009 | Aug 11, 2009 | Enervest Operating, L.L.C. | Fayette | Cedar Creek "B" Amarado Unit #2REH | 12,500 | 14932775 |
| 683119Amendment | Aug 11, 2009 | Aug 11, 2009 | Enervest Operating, L.L.C. | Fayette | Cedar Creek "B" Amarado Unit #2REH | 12,500 | 14932775 |
| 683630 | Aug 4, 2009 | Aug 4, 2009 | Enervest Operating, L.L.C. | Fayette | Patterson Unit #2REH | 14,000 | 14933198 |
| 682972 | Jul 15, 2009 | Jul 15, 2009 | Enervest Operating, L.L.C. | Brazos | McCullough-McCullough Unit #1REH | 12,500 | 04131588 |
| 682972Amendment | Jul 15, 2009 | Jul 15, 2009 | Enervest Operating, L.L.C. | Brazos | McCullough-McCullough Unit #1REH | 12,500 | 04131588 |
| 682537 | Jul 13, 2009 | Jul 13, 2009 | Enervest Operating, L.L.C. | Lee | Wolf-Simpson Unit #1REH | 9,950 | 28730902 |
| 682537Amendment | Jul 13, 2009 | Jul 13, 2009 | Enervest Operating, L.L.C. | Lee | Wolf-Simpson Unit #1REH | 11,979 | 28730902 |
| 682691 | Jul 7, 2009 | Jul 7, 2009 | Enervest Operating, L.L.C. | Brazos | McCullough-Olden Unit #1REH | 11,500 | 04131700 |
| 682593 | Jul 1, 2009 | Jul 1, 2009 | Enervest Operating, L.L.C. | Brazos | Marcella Goen Unit #1REH | 12,000 | 04131676 |
| 682593Amendment | Jul 1, 2009 | Jul 1, 2009 | Enervest Operating, L.L.C. | Brazos | Marcella Goen Unit #1REH | 12,000 | 04131676 |
| 682406 | Jun 29, 2009 | Jun 29, 2009 | Enervest Operating, L.L.C. | Brazos | McCullough-McCullough "A" #1REH | 12,000 | 04131672 |
| 682406Amendment | Jun 29, 2009 | Jun 29, 2009 | Enervest Operating, L.L.C. | Brazos | McCullough-McCullough "A" #1REH | 12,000 | 04131672 |
| 681954 | Jun 10, 2009 | Jun 10, 2009 | Enervest Operating, L.L.C. | Fayette | Holmes Ranch #1REH | 13,000 | 14932754 |
| 681421 | May 21, 2009 | May 21, 2009 | Enervest Operating, L.L.C. | Harrison | Jennifer Stewart Gas Unit #12 | 11,500 | 20334840 |
| 681396 | May 21, 2009 | May 21, 2009 | Enervest Operating, L.L.C. | Harrison | Hart Gas Unit #10 | 11,000 | 20334839 |
| 677778Amendment | May 5, 2009 | May 5, 2009 | Enervest Operating, L.L.C. | Brazos | C.F. Goen Unit #1REH | 10,957 | 04131669 |
| 679650 | Mar 20, 2009 | Mar 20, 2009 | Enervest Operating, L.L.C. | Lee | Ruthven-Bisett Co-OP Unit #1H | 11,000 | 28732562 |
| 679650Amendment | Mar 20, 2009 | Mar 20, 2009 | Enervest Operating, L.L.C. | Lee | Ruthven-Bisett Co-OP Unit #1H | 11,000 | 28732562 |
| 679483 | Mar 17, 2009 | Mar 17, 2009 | Enervest Operating, L.L.C. | Fayette | Noack-Zoch Unit #1REH | 11,000 | 14932496 |
| 678864Amendment | Mar 17, 2009 | Mar 17, 2009 | Enervest Operating, L.L.C. | Brazos | Marrs-Quinn Unit #1REH | 15,629 | 04131819 |
| 679136 | Mar 6, 2009 | Mar 6, 2009 | Enervest Operating, L.L.C. | Harrison | Resch Gas Unit #14 | 11,000 | 20335129 |
| 678864 | Feb 25, 2009 | Feb 25, 2009 | Enervest Operating, L.L.C. | Brazos | Marrs-Quinn Unit #1REH | 14,000 | 04131819 |
| 678864Amendment | Feb 25, 2009 | Feb 25, 2009 | Enervest Operating, L.L.C. | Brazos | Marrs-Quinn Unit #1REH | 14,000 | 04131819 |
| 678475 | Feb 23, 2009 | Feb 23, 2009 | Enervest Operating, L.L.C. | Burleson | Leachman-Robinson Unit #1REH | 12,000 | 05133357 |
| 677977 | Feb 19, 2009 | Feb 19, 2009 | Enervest Operating, L.L.C. | Fayette | Bohot-Bohot Unit #1REH | 10,000 | 14932557 |
| 678476 | Feb 12, 2009 | Feb 12, 2009 | Enervest Operating, L.L.C. | Brazos | Weedon-Weedon Unit #1REH | 11,200 | 04131487 |
| 678476Amendment | Feb 12, 2009 | Feb 12, 2009 | Enervest Operating, L.L.C. | Brazos | Weedon-Weedon Unit #1REH | 13,000 | 04131487 |
| 678207 | Feb 6, 2009 | Feb 6, 2009 | Enervest Operating, L.L.C. | Burleson | J. K. Lassig Unit #1REH | 11,500 | 05133321 |
| 678165 | Feb 5, 2009 | Feb 5, 2009 | Enervest Operating, L.L.C. | Lee | Bluebonnet Unit #2REH | 10,000 | 28731187 |
| 676567 | Feb 5, 2009 | Feb 5, 2009 | Enervest Operating, L.L.C. | Jasper | Temple Inland A41 #2H | 13,000 | 24130786 |
| 676567Amendment | Feb 5, 2009 | Feb 5, 2009 | Enervest Operating, L.L.C. | Jasper | Temple Inland A41 #2H | 13,000 | 24130786 |
| 678032 | Feb 3, 2009 | Feb 3, 2009 | Enervest Operating, L.L.C. | Lee | Tate Unit #1REH | 10,000 | 28732436 |
| 678028 | Feb 3, 2009 | Feb 3, 2009 | Enervest Operating, L.L.C. | Burleson | Hoelscher, Alice B. #1REH | 11,500 | 05133326 |
| 677989 | Feb 3, 2009 | Feb 3, 2009 | Enervest Operating, L.L.C. | Washington | Liebscher-OL Unit #1REH | 12,000 | 47730711 |
| 677778 | Jan 28, 2009 | Jan 28, 2009 | Enervest Operating, L.L.C. | Brazos | C.F. Goen Unit #1REH | 11,800 | 04131669 |
| 675341 | Dec 10, 2008 | Dec 10, 2008 | Enervest Operating, L.L.C. | Harrison | Hunt Gas Unit #4D | 11,500 | 20334746 |
| 675865 | Dec 8, 2008 | Dec 8, 2008 | Enervest Operating, L.L.C. | Rusk | Sparkman Gas Unit #4 | 12,000 | 40134979 |
| 675863 | Dec 8, 2008 | Dec 8, 2008 | Enervest Operating, L.L.C. | Rusk | Sparkman Gas Unit #3 | 12,000 | 40134978 |
| 675343 | Nov 25, 2008 | Nov 25, 2008 | Enervest Operating, L.L.C. | Harrison | Hunt Gas Unit #17D | 11,500 | 20334748 |
| 675342 | Nov 25, 2008 | Nov 25, 2008 | Enervest Operating, L.L.C. | Harrison | Hunt Gas Unit #15 | 11,500 | 20334747 |
| 675147 | Nov 21, 2008 | Nov 21, 2008 | Enervest Operating, L.L.C. | Crockett | Smith Bros. #1 | 10,000 | 10540917 |
| 674461 | Nov 20, 2008 | Nov 20, 2008 | Enervest Operating, L.L.C. | Lee | Ullrich 'A' #1REH | 10,900 | 28732379 |
| 671759 | Nov 7, 2008 | Nov 7, 2008 | Enervest Operating, L.L.C. | Brazos | Treatment Plant #1H | 9,248 | 04131809 |
| 673971 | Oct 31, 2008 | Oct 31, 2008 | Enervest Operating, L.L.C. | Harrison | Hart Gas Unit #17 | 11,500 | 20334725 |
| 673536 | Oct 24, 2008 | Oct 24, 2008 | Enervest Operating, L.L.C. | Harrison | Jones Gas Unit #5 | 11,500 | 20334714 |
| 664908Amendment | Oct 22, 2008 | Oct 22, 2008 | Enervest Operating, L.L.C. | Lee | K-Bob Co-OP Unit #2H | 11,000 | 28732555 |
| 673437 | Oct 20, 2008 | Oct 20, 2008 | Enervest Operating, L.L.C. | Ochiltree | C. M. Morton Share Trust #1 | 7,000 | 35732795 |
| 673437Amendment | Oct 20, 2008 | Oct 20, 2008 | Enervest Operating, L.L.C. | Ochiltree | C. M. Morton Share Trust #1 | 6,840 | 35732795 |
| 672071 | Oct 8, 2008 | Oct 8, 2008 | Enervest Operating, L.L.C. | Rusk | J. O. Poovey #2 | 12,000 | 40134937 |
| 671612 | Oct 7, 2008 | Oct 7, 2008 | Enervest Operating, L.L.C. | Washington | Studhalter #1 | 5,500 | 47730974 |
| 671821 | Oct 6, 2008 | Oct 6, 2008 | Enervest Operating, L.L.C. | Harrison | Hart Gas Unit #12 | 11,000 | 20334677 |
| 671699 | Oct 6, 2008 | Oct 6, 2008 | Enervest Operating, L.L.C. | Harrison | Resch Gas Unit #15 | 11,000 | 20334671 |
| 671613 | Oct 4, 2008 | Oct 4, 2008 | Enervest Operating, L.L.C. | Washington | Schultz, Walter #1 | 5,500 | 47730975 |
| 670966 | Sep 30, 2008 | Sep 30, 2008 | Enervest Operating, L.L.C. | Washington | Borgstedt-O.L. Unit #1REH | 12,000 | 47730713 |
| 670966Amendment | Sep 30, 2008 | Sep 30, 2008 | Enervest Operating, L.L.C. | Washington | Borgstedt-O.L. Unit #1REH | 12,000 | 47730713 |
| 670473 | Sep 22, 2008 | Sep 22, 2008 | Enervest Operating, L.L.C. | Rusk | Jarrell #A 2 | 11,500 | 40134919 |
| 669371 | Sep 9, 2008 | Sep 9, 2008 | Enervest Operating, L.L.C. | Rusk | Sparkman Gas Unit #2 | 11,500 | 40134901 |
| 667731 | Sep 9, 2008 | Sep 9, 2008 | Enervest Operating, L.L.C. | Washington | Fife Unit #2REH | 15,000 | 47730884 |
| 667731Amendment | Sep 9, 2008 | Sep 9, 2008 | Enervest Operating, L.L.C. | Washington | Fife Unit #2REH | 15,000 | 47730884 |
| 669141 | Sep 6, 2008 | Sep 6, 2008 | Enervest Operating, L.L.C. | Fayette | Patterson Unit #2H | 14,000 | 14933198 |
| 669141Amendment | Sep 6, 2008 | Sep 6, 2008 | Enervest Operating, L.L.C. | Fayette | Patterson Unit #2H | 14,000 | 14933198 |
| 668834 | Sep 2, 2008 | Sep 2, 2008 | Enervest Operating, L.L.C. | Brazos | Olden-Paull Unit #1H | 15,003 | 04131643 |
| 668766 | Sep 2, 2008 | Sep 2, 2008 | Enervest Operating, L.L.C. | Harrison | Loftis Gas Unit #15 | 11,500 | 20334622 |
| 669594 | Aug 28, 2008 | Aug 28, 2008 | Enervest Operating, L.L.C. | Harrison | Bailey Gas Unit #16HH | 11,500 | 20334625 |
| 668419 | Aug 25, 2008 | Aug 25, 2008 | Enervest Operating, L.L.C. | Brazos | Millican-Glenn Unit #1REH | 13,000 | 04131781 |
| 668419Amendment | Aug 25, 2008 | Aug 25, 2008 | Enervest Operating, L.L.C. | Brazos | Millican-Glenn Unit #1REH | 11,894 | 04131781 |
| 666960 | Aug 6, 2008 | Aug 6, 2008 | Enervest Operating, L.L.C. | Brazos | Beulah Goen Unit #1REH | 13,500 | 04131667 |
| 666960Amendment | Aug 6, 2008 | Aug 6, 2008 | Enervest Operating, L.L.C. | Brazos | Beulah Goen Unit #1REH | 10,825 | 04131667 |
| 666702 | Aug 5, 2008 | Aug 5, 2008 | Enervest Operating, L.L.C. | Harrison | Bivins Zeigler Gas Unit #3 | 11,500 | 20334593 |
| 666414 | Jul 30, 2008 | Jul 30, 2008 | Enervest Operating, L.L.C. | Harrison | Loftis Gas Unit #12 | 11,500 | 20334585 |
| 665827 | Jul 22, 2008 | Jul 22, 2008 | Enervest Operating, L.L.C. | Rusk | Sparkman Gas Unit #1 | 12,000 | 40134845 |
| 664908 | Jul 17, 2008 | Jul 17, 2008 | Enervest Operating, L.L.C. | Lee | K-Bob Co-OP Unit #2H | 11,000 | 28732555 |
| 664575 | Jul 14, 2008 | Jul 14, 2008 | Enervest Operating, L.L.C. | Harrison | Smith Gas Unit #1D | 11,500 | 20334550 |
| 664539 | Jul 11, 2008 | Jul 11, 2008 | Enervest Operating, L.L.C. | Jasper | Arco Fee Unit A-222 #2H | 13,500 | 24130769 |
| 664539Amendment | Jul 11, 2008 | Jul 11, 2008 | Enervest Operating, L.L.C. | Jasper | Arco Fee Unit A-222 #2H | 13,500 | 24130769 |
| 664539Amendment | Jul 11, 2008 | Jul 11, 2008 | Enervest Operating, L.L.C. | Jasper | Arco Fee Unit A-222 #2H | 12,417 | 24130769 |
| 662238 | Jun 6, 2008 | Jun 6, 2008 | Enervest Operating, L.L.C. | Coke | Fort Chadbourne Odom Lime Unit #5304 | 5,800 | 08131921 |
| 662054 | Jun 4, 2008 | Jun 4, 2008 | Enervest Operating, L.L.C. | Rusk | Markey Gas Unit #1 | 9,500 | 40134778 |
| 661538 | May 30, 2008 | May 30, 2008 | Enervest Operating, L.L.C. | Brazos | Allen, Henry L. #1REH | 14,300 | 04131769 |
| 661538Amendment | May 30, 2008 | May 30, 2008 | Enervest Operating, L.L.C. | Brazos | Allen, Henry L. #1REH | 11,993 | 04131769 |
| 660315 | May 7, 2008 | May 7, 2008 | Enervest Operating, L.L.C. | Rusk | Jarrell #1 | 12,000 | 40134751 |
| 659734 | Apr 30, 2008 | Apr 30, 2008 | Enervest Operating, L.L.C. | Fayette | Galloping Ghost Unit #2H | 13,000 | 14933191 |
| 659734Amendment | Apr 30, 2008 | Apr 30, 2008 | Enervest Operating, L.L.C. | Fayette | Galloping Ghost Unit #2H | 13,000 | 14933191 |
| 659698Amendment | Apr 30, 2008 | Apr 30, 2008 | Enervest Operating, L.L.C. | Wise | Moore Gas Unit #2HH | 8,500 | 49736518 |
| 659697Amendment | Apr 30, 2008 | Apr 30, 2008 | Enervest Operating, L.L.C. | Wise | Moore Gas Unit #1HH | 8,500 | 49736517 |
| 659079 | Apr 28, 2008 | Apr 28, 2008 | Enervest Operating, L.L.C. | Jasper | Arco Fee Unit A580 #2H | 13,000 | 24130762 |
| 659079Amendment | Apr 28, 2008 | Apr 28, 2008 | Enervest Operating, L.L.C. | Jasper | Arco Fee Unit A580 #2H | 13,000 | 24130762 |
| 659243 | Apr 24, 2008 | Apr 24, 2008 | Enervest Operating, L.L.C. | Harrison | James A. Ruppe, et al Gas Unit #2 | 9,000 | 20334405 |