| 623649 | Aug 2, 2006 | Aug 2, 2006 | J-W Operating Co. | Sams #2HH | 15,000 | 42332128 |
| 623338 | Jul 27, 2006 | Jul 27, 2006 | Berkshire Woodlawn Field, LLC | Grace #1A | 8,000 | 42332126 |
| 623294 | Jul 26, 2006 | Jul 26, 2006 | J-W Operating Co. | Lake Ronel #2 | 15,000 | 42332125 |
| 621743 | Jul 21, 2006 | Jul 21, 2006 | J-W Operating Co. | Slayton Unit #4 | 15,000 | 42332121 |
| 622911 | Jul 20, 2006 | Jul 20, 2006 | Southwestern Energy Prod. Co. | Jesse Randolph Odom Gas Unit 1 #6 | 12,500 | 42332124 |
| 622911Amendment | Jul 20, 2006 | Jul 20, 2006 | Southwestern Energy Prod. Co. | Jesse Randolph Odom Gas Unit 1 #6 | 12,500 | 42332124 |
| 622456 | Jul 13, 2006 | Jul 13, 2006 | Southwestern Energy Prod. Co. | Sallie M. Warren Hrs. Gas Unit 1 #12 | 12,400 | 42332123 |
| 622245 | Jul 11, 2006 | Jul 11, 2006 | Southwestern Energy Prod. Co. | McMoyle Unit 1 #17 | 12,300 | 42332122 |
| 622245Amendment | Jul 11, 2006 | Jul 11, 2006 | Southwestern Energy Prod. Co. | McMoyle Unit 1 #17 | 12,300 | 42332122 |
| 621742 | Jun 29, 2006 | Jun 29, 2006 | Southwestern Energy Prod. Co. | Newsome Unit 1 #17 | 12,200 | 42332120 |
| 621092 | Jun 29, 2006 | Jun 29, 2006 | Encore Operating, L.P. | Guthrie #5 | 12,000 | 42332116 |
| 621736 | Jun 28, 2006 | Jun 28, 2006 | Southwestern Energy Prod. Co. | Morby Unit 1 #16 | 12,300 | 42332119 |
| 621023 | Jun 26, 2006 | Jun 26, 2006 | Encore Operating, L.P. | McElroy #12 | 12,000 | 42332115 |
| 621236 | Jun 20, 2006 | Jun 20, 2006 | Southwestern Energy Prod. Co. | Arnold Gas Unit 1 #13 | 12,000 | 42332117 |
| 620897 | Jun 16, 2006 | Jun 16, 2006 | Map Production Co., Inc. | Morby OU #18 | 8,000 | 42332114 |
| 620897Amendment | Jun 16, 2006 | Jun 16, 2006 | Ensight III Energy Mgmt, LLC | Morby OU #18 | 8,000 | 42332114 |
| 620897Amendment | Jun 16, 2006 | Jun 16, 2006 | Ensight III Energy Mgmt, LLC | Morby Oil Unit No. 18 #1 | 8,000 | 42332114 |
| 620902 | Jun 14, 2006 | Jun 14, 2006 | Southwestern Energy Prod. Co. | Waldrop Gas Unit 1 #17 | 12,360 | 42332113 |
| 620887 | Jun 14, 2006 | Jun 14, 2006 | Southwestern Energy Prod. Co. | Sallie M. Warren Hrs. Gas Unit 1 #9 | 12,200 | 42332112 |
| 620881 | Jun 14, 2006 | Jun 14, 2006 | Southwestern Energy Prod. Co. | Kirkpatrick Gas Unit 1 #7 | 12,475 | 42332111 |
| 620881Amendment | Jun 14, 2006 | Jun 14, 2006 | Southwestern Energy Prod. Co. | Kirkpatrick Gas Unit 1 #7 | 12,475 | 42332111 |
| 620727 | Jun 9, 2006 | Jun 9, 2006 | J-W Operating Co. | Littlejohn #6HH | 13,000 | 42332110 |
| 620727Amendment | Jun 9, 2006 | Jun 9, 2006 | J-W Operating Co. | Littlejohn #6H | 14,000 | 42332110 |
| 620582 | Jun 9, 2006 | Jun 9, 2006 | J-W Operating Co. | Cloke #4HH | 13,000 | 42332108 |
| 620630 | Jun 8, 2006 | Jun 8, 2006 | Southwestern Energy Prod. Co. | Morby Unit 1 #15 | 12,200 | 42332109 |
| 618162 | Jun 7, 2006 | Jun 7, 2006 | Southwestern Energy Prod. Co. | Jerry Cross Gas Unit 1 #3 | 12,250 | 42332095 |
| 618162Amendment | Jun 7, 2006 | Jun 7, 2006 | Southwestern Energy Prod. Co. | Jerry Cross Gas Unit 1 #3 | 12,250 | 42332095 |
| 620083 | Jun 2, 2006 | Jun 2, 2006 | Atlantis Oil Company, Inc. | Stewart, Graham P. #1 | 7,000 | 42332107 |
| 619938 | May 26, 2006 | May 26, 2006 | Southwestern Energy Prod. Co. | Kickapoo Creek Gas Unit 1 #16 | 12,100 | 42332106 |
| 619936 | May 26, 2006 | May 26, 2006 | Southwestern Energy Prod. Co. | Kirkpatrick Gas Unit 1 #5 | 12,450 | 42332105 |
| 619485 | May 18, 2006 | May 18, 2006 | Southwestern Energy Prod. Co. | Newsome Unit 1 #14 | 12,500 | 42332104 |
| 619051 | May 10, 2006 | May 10, 2006 | Southwestern Energy Prod. Co. | Grady Wilson Gas Unit 1 #14 | 12,450 | 42332103 |
| 619048 | May 10, 2006 | May 10, 2006 | Southwestern Energy Prod. Co. | McMoyle Unit 1 #12 | 12,300 | 42332102 |
| 619046 | May 10, 2006 | May 10, 2006 | Southwestern Energy Prod. Co. | Morby Unit 1 #14 | 12,200 | 42332101 |
| 618801 | May 8, 2006 | May 8, 2006 | Southwestern Energy Prod. Co. | McMoyle Unit 1 #10 | 12,250 | 42332100 |
| 618801Amendment | May 8, 2006 | May 8, 2006 | Southwestern Energy Prod. Co. | McMoyle Unit 1 #10 | 12,250 | 42332100 |
| 618798 | May 8, 2006 | May 8, 2006 | Southwestern Energy Prod. Co. | Kirkpatrick Gas Unit 1 #3 | 12,300 | 42332099 |
| 618723 | May 5, 2006 | May 5, 2006 | Southwestern Energy Prod. Co. | Vernon B. Wilson Gas Unit 1 #17 | 12,200 | 42332098 |
| 618541 | May 2, 2006 | May 2, 2006 | Southwestern Energy Prod. Co. | McMoyle Unit 1 #13 | 12,450 | 42332097 |
| 618225 | Apr 26, 2006 | Apr 26, 2006 | Barrow-Shaver Resources Co. | Campbell #1 | 11,000 | 42332096 |
| 617990 | Apr 24, 2006 | Apr 24, 2006 | Southwestern Energy Prod. Co. | Jerry Cross Gas Unit 1 #13 | 12,400 | 42332094 |
| 616414 | Apr 21, 2006 | Apr 21, 2006 | Southwestern Energy Prod. Co. | Jesse Randolph Odom Gas Unit 1 #5 | 12,500 | 42332088 |
| 617611 | Apr 20, 2006 | Apr 20, 2006 | Encore Operating, L.P. | Guthrie #6 | 12,000 | 42332093 |
| 617611Amendment | Apr 20, 2006 | Apr 20, 2006 | Encore Operating, L.P. | Guthrie #6 | 12,000 | 42332093 |
| 616250 | Apr 18, 2006 | Apr 18, 2006 | J-W Operating Co. | Maynard, A. #9 | 13,000 | 42332087 |
| 617223 | Apr 11, 2006 | Apr 11, 2006 | Southwestern Energy Prod. Co. | Perry Gas Unit 1 #7 | 12,400 | 42332092 |
| 617219 | Apr 11, 2006 | Apr 11, 2006 | Southwestern Energy Prod. Co. | Grady Wilson GU 1 #15 | 12,300 | 42332091 |
| 617239 | Apr 10, 2006 | Apr 10, 2006 | SDG Operating Company, Inc | A. S. Genecov #3 | 7,700 | 42331568 |
| 616761 | Mar 31, 2006 | Mar 31, 2006 | J-W Operating Co. | Wilson, Walker #1 | 13,000 | 42332090 |
| 616485 | Mar 28, 2006 | Mar 28, 2006 | Southwestern Energy Prod. Co. | McMoyle Unit 1 #14 | 12,600 | 42332089 |
| 616186 | Mar 22, 2006 | Mar 22, 2006 | C. W. Resources, Inc. | Challenger #1 | 12,500 | 42332086 |
| 615851 | Mar 20, 2006 | Mar 20, 2006 | Encore Operating, L.P. | Wilson, David G. 2 #2 | 12,000 | 42332085 |
| 615743 | Mar 14, 2006 | Mar 14, 2006 | Carrizo Oil & Gas, Inc. | Chisum #1 | 9,500 | 42331963 |
| 615743Amendment | Mar 14, 2006 | Mar 14, 2006 | Carrizo Oil & Gas, Inc. | Chisum #1 | 9,500 | 42331963 |
| 615743Amendment | Mar 14, 2006 | Mar 14, 2006 | Carrizo Oil & Gas, Inc. | Chisum #1 | 9,900 | 42331963 |
| 615655 | Mar 10, 2006 | Mar 10, 2006 | J-W Operating Co. | Cloke #3HH | 13,000 | 42332084 |
| 612385 | Mar 2, 2006 | Mar 2, 2006 | Southwestern Energy Prod. Co. | Newsome Unit 1 #11 | 12,200 | 42332070 |
| 612385Amendment | Mar 2, 2006 | Mar 2, 2006 | Southwestern Energy Prod. Co. | Newsome Unit 1 #11 | 12,200 | 42332070 |
| 612385Amendment | Mar 2, 2006 | Mar 2, 2006 | Southwestern Energy Prod. Co. | Newsome Unit 1 #11 | 12,200 | 42332070 |
| 614991 | Mar 1, 2006 | Mar 1, 2006 | Southwestern Energy Prod. Co. | Perry Gas Unit 1 #8 | 12,200 | 42332083 |
| 614990 | Mar 1, 2006 | Mar 1, 2006 | Southwestern Energy Prod. Co. | McMoyle Unit 1 #11 | 12,350 | 42332082 |
| 613325 | Feb 28, 2006 | Feb 28, 2006 | Southwestern Energy Prod. Co. | Waldrop Gas Unit 1 #12 | 12,300 | 42332076 |
| 613325Amendment | Feb 28, 2006 | Feb 28, 2006 | Southwestern Energy Prod. Co. | Waldrop Gas Unit 1 #12 | 12,410 | 42332076 |
| 614904 | Feb 27, 2006 | Feb 27, 2006 | J-W Operating Co. | Swinney #4HH | 13,000 | 42332081 |
| 614762 | Feb 24, 2006 | Feb 24, 2006 | J-W Operating Co. | Swinney #3HH | 13,000 | 42332080 |
| 614589 | Feb 24, 2006 | Feb 24, 2006 | J-W Operating Co. | Maynard, A. #8 | 13,000 | 42332079 |
| 612142 | Feb 16, 2006 | Feb 16, 2006 | Southwestern Energy Prod. Co. | Newsome Unit 1 #9 | 12,200 | 42332063 |
| 612142Amendment | Feb 16, 2006 | Feb 16, 2006 | Southwestern Energy Prod. Co. | Newsome Unit 1 #9 | 12,200 | 42332063 |
| 612663 | Feb 9, 2006 | Feb 9, 2006 | Southwestern Energy Prod. Co. | Douglas #1 | 12,200 | 42332071 |
| 611383 | Feb 7, 2006 | Feb 7, 2006 | Southwestern Energy Prod. Co. | Newsome Unit 1 #7 | 12,100 | 42332059 |
| 613576 | Feb 6, 2006 | Feb 6, 2006 | Barrow-Shaver Resources Co. | Cowan #1 | 11,000 | 42332078 |
| 613515 | Feb 3, 2006 | Feb 3, 2006 | J-W Operating Co. | Chapel Hill SWD #1 | 4,700 | 42332077 |
| 612933 | Jan 25, 2006 | Jan 25, 2006 | Southwestern Energy Prod. Co. | Vernon B. Wilson Gas Uni 1 #16 | 12,250 | 42332075 |
| 612680 | Jan 20, 2006 | Jan 20, 2006 | Southwestern Energy Prod. Co. | Morby Unit 1 #12 | 12,300 | 42332074 |
| 612679 | Jan 20, 2006 | Jan 20, 2006 | Southwestern Energy Prod. Co. | Arnold Gas Unit 2 #14 | 12,100 | 42332073 |
| 612679Amendment | Jan 20, 2006 | Jan 20, 2006 | Southwestern Energy Prod. Co. | Arnold Gas Unit 2 #14 | 11,885 | 42332073 |
| 612678 | Jan 20, 2006 | Jan 20, 2006 | Southwestern Energy Prod. Co. | Barton Gas Unit 1 #3 | 12,200 | 42332072 |
| 611139 | Jan 19, 2006 | Jan 19, 2006 | Southwestern Energy Prod. Co. | Newsome Unit 1 #8 | 12,400 | 42332057 |
| 612342 | Jan 13, 2006 | Jan 13, 2006 | J-W Operating Co. | Maynard, A. #7 | 13,000 | 42332069 |
| 612168 | Jan 12, 2006 | Jan 12, 2006 | Southwestern Energy Prod. Co. | Arnold Gas Unit 2 #15 | 12,100 | 42332068 |
| 612166 | Jan 12, 2006 | Jan 12, 2006 | Southwestern Energy Prod. Co. | Woolf Gas Unit 1 #17 | 11,850 | 42332067 |
| 612165 | Jan 12, 2006 | Jan 12, 2006 | Southwestern Energy Prod. Co. | McMoyle Unit 1 #8 | 12,350 | 42332066 |
| 612164 | Jan 12, 2006 | Jan 12, 2006 | Southwestern Energy Prod. Co. | Newsome Unit 1 #10 | 12,200 | 42332065 |
| 612162 | Jan 12, 2006 | Jan 12, 2006 | Southwestern Energy Prod. Co. | Jerry Cross Gas Unit 1 #10 | 12,200 | 42332064 |
| 612162Amendment | Jan 12, 2006 | Jan 12, 2006 | Southwestern Energy Prod. Co. | Jerry Cross Gas Unit 1 #10 | 12,200 | 42332064 |
| 610309 | Jan 9, 2006 | Jan 9, 2006 | Southwestern Energy Prod. Co. | Morby Unit 1 #11 | 12,200 | 42332046 |
| 611777 | Jan 4, 2006 | Jan 4, 2006 | Winwell, L.L.C. | Roach, Mary #1 | 9,000 | 42332062 |
| 611494 | Dec 29, 2005 | Dec 29, 2005 | Encore Operating, L.P. | Walls #1 | 12,000 | 42332061 |
| 611352 | Dec 27, 2005 | Dec 27, 2005 | Encore Operating, L.P. | Wilson, David G. #15 | 12,000 | 42332060 |
| 611352Amendment | Dec 27, 2005 | Dec 27, 2005 | Encore Operating, L.P. | Wilson, David G. #15 | 12,000 | 42332060 |
| 611196 | Dec 19, 2005 | Dec 19, 2005 | Southwestern Energy Prod. Co. | Kirkpatrick Gas Unit 1 #4 | 12,400 | 42332058 |
| 611140 | Dec 16, 2005 | Dec 16, 2005 | Southwestern Energy Prod. Co. | Kickapoo Creek Gas Unit 1 #15 | 12,200 | 42332055 |
| 611138 | Dec 16, 2005 | Dec 16, 2005 | Southwestern Energy Prod. Co. | Allred Gas Unit 1 #15 | 12,200 | 42332056 |
| 610953 | Dec 14, 2005 | Dec 14, 2005 | Southwestern Energy Prod. Co. | Perry Gas Unit 1 #6 | 12,400 | 42332054 |
| 609683 | Dec 12, 2005 | Dec 12, 2005 | Southwestern Energy Prod. Co. | Wright Gas Unit 1 #9 | 12,000 | 42332043 |
| 609683Amendment | Dec 12, 2005 | Dec 12, 2005 | Southwestern Energy Prod. Co. | Wright Gas Unit 1 #9 | 12,000 | 42332043 |
| 609202 | Dec 12, 2005 | Dec 12, 2005 | Encore Operating, L.P. | Swann, M. C. #13 | 12,000 | 42332039 |
| 610690 | Dec 9, 2005 | Dec 9, 2005 | Antero Resources II, LP | Echard Heirs Unit #5 | 11,950 | 42332053 |
| 610690Amendment | Dec 9, 2005 | Dec 9, 2005 | Antero Resources II, LP | Echard Heirs Unit #5 | 12,150 | 42332053 |
| 610690Amendment | Dec 9, 2005 | Dec 9, 2005 | Exco Resources, Inc. | Echard Heirs Unit #5 | 13,000 | 42332053 |