| 651845Amendment | Dec 31, 2007 | Dec 31, 2007 | El Paso E&P Zapata, L.P. | Benavides "A" #1350536056 | 11,500 |
| 651678 | Dec 21, 2007 | Dec 21, 2007 | Forest Oil Corporation | Rodriguez Gas Unit 1 #1850536054 | 12,300 |
| 651678Amendment | Dec 21, 2007 | Dec 21, 2007 | Forest Oil Corporation | Rodriguez Gas Unit 1 #1850536054 | 12,300 |
| 651642 | Dec 20, 2007 | Dec 20, 2007 | Laredo Energy | Garza #450536053 | 14,500 |
| 651642Amendment | Dec 20, 2007 | Dec 20, 2007 | Laredo Energy | Garza #450536053 | 15,500 |
| 651526 | Dec 20, 2007 | Dec 20, 2007 | Coronado Energy E&P Company, LLC | Trevino "B" #550535475 | 11,300 |
| 651525 | Dec 20, 2007 | Dec 20, 2007 | Coronado Energy E&P Company, LLC | Trevino "B" #450535346 | 11,300 |
| 651500 | Dec 20, 2007 | Dec 20, 2007 | Conocophillips Company | Don Jose Land & Cattle Co Ltd #850536052 | 12,200 |
| 651498 | Dec 20, 2007 | Dec 20, 2007 | Conocophillips Company | Don Jose Land & Cattle Co Ltd #750536051 | 9,400 |
| 651496 | Dec 20, 2007 | Dec 20, 2007 | Conocophillips Company | Don Jose Land & Cattle Co Ltd #650536050 | 9,400 |
| 651494 | Dec 20, 2007 | Dec 20, 2007 | Conocophillips Company | Don Jose Land & Cattle Co Ltd #550536055 | 12,100 |
| 651443 | Dec 19, 2007 | Dec 19, 2007 | El Paso E&P Zapata, L.P. | El Clareno #1250536049 | 11,800 |
| 651427 | Dec 19, 2007 | Dec 19, 2007 | Chesapeake Operating, Inc. | J. Vela Cuellar G. U. B #150536048 | 14,000 |
| 651398 | Dec 19, 2007 | Dec 19, 2007 | Coronado Energy E&P Company, LLC | Jennings, J.D. #49050536047 | 5,800 |
| 651321 | Dec 17, 2007 | Dec 17, 2007 | Eagle Oil & Gas Co. | Uribe #350536046 | 10,500 |
| 651283 | Dec 17, 2007 | Dec 17, 2007 | Pogo Producing Company | Haynes, L. #18650536045 | 10,200 |
| 651229 | Dec 17, 2007 | Dec 17, 2007 | Conocophillips Company | Jennings Ranch D #3950536044 | 13,700 |
| 651106 | Dec 17, 2007 | Dec 17, 2007 | El Paso E&P Zapata, L.P. | El Clareno #250535387 | 10,500 |
| 651136 | Dec 15, 2007 | Dec 15, 2007 | Ricochet Energy, Inc. | G.G. Salinas #550536041 | 9,700 |
| 651039 | Dec 15, 2007 | Dec 15, 2007 | El Paso E&P Zapata, L.P. | Haynes "A" #1050536039 | 16,500 |
| 650953 | Dec 14, 2007 | Dec 14, 2007 | Enterprise Products Operating LP | ZP-O Roxana Petroleum Corp #1HB50536042 | 350 |
| 650923 | Dec 14, 2007 | Dec 14, 2007 | Forest Oil Corporation | Rodriguez Gas Unit 1 #1750536040 | 12,200 |
| 650923Amendment | Dec 14, 2007 | Dec 14, 2007 | Forest Oil Corporation | Rodriguez Gas Unit 1 #1750536040 | 12,200 |
| 650923Amendment | Dec 14, 2007 | Dec 14, 2007 | Forest Oil Corporation | Rodriguez Gas Unit 1 #1750536040 | 12,200 |
| 643030 | Dec 14, 2007 | Dec 14, 2007 | Enterprise Products Operating LP | ZE-12 #Z 12E50536043 | 500 |
| 650814 | Dec 12, 2007 | Dec 12, 2007 | Hughes, Dan A. Company, L.P. | Fulbright, J. E. "G" #750534385 | 13,600 |
| 650642 | Dec 12, 2007 | Dec 12, 2007 | Pogo Producing Company | Haynes, L. #18450536038 | 10,700 |
| 647335Amendment | Dec 12, 2007 | Dec 12, 2007 | Pogo Producing Company | Haynes, L. #18350536000 | 11,100 |
| 647335Amendment | Dec 12, 2007 | Dec 12, 2007 | Pogo Producing Company LLC | Haynes, L. #18350536000 | 11,100 |
| 650374 | Dec 11, 2007 | Dec 11, 2007 | El Paso E&P Zapata, L.P. | El Clareno #750535822 | 20,000 |
| 643272Amendment | Dec 6, 2007 | Dec 6, 2007 | Chesapeake Operating, Inc. | Alexander "A" #550535942 | 15,000 |
| 650202 | Dec 5, 2007 | Dec 5, 2007 | Coronado Energy E&P Company, LLC | Jennings, J. D. #48950536036 | 5,800 |
| 650166 | Dec 4, 2007 | Dec 4, 2007 | El Paso E&P Zapata, L.P. | Haynes-Hinnant #150536035 | 13,500 |
| 650136 | Dec 3, 2007 | Dec 3, 2007 | EOG Resources, Inc. | BMT-Barrocito #250536034 | 12,500 |
| 650123 | Nov 30, 2007 | Nov 30, 2007 | Paloma Resources, LLC | Delozeis "A" #B 150536033 | 13,500 |
| 650109 | Nov 30, 2007 | Nov 30, 2007 | Conocophillips Company | Don Jose Land & Cattle Co Ltd #450536031 | 12,100 |
| 650100 | Nov 30, 2007 | Nov 30, 2007 | Paloma Resources, LLC | Blanca Aurora Salinas "A" #A 150536032 | 8,500 |
| 649644 | Nov 29, 2007 | Nov 29, 2007 | XTO Energy Inc. | F.D. Laurel "A" #1350536027 | 14,500 |
| 649856 | Nov 26, 2007 | Nov 26, 2007 | Ricochet Energy, Inc. | Villarreal #250536030 | 11,000 |
| 649657 | Nov 26, 2007 | Nov 26, 2007 | Pogo Producing Company | Cassin, E. W. et Al #450536028 | 9,500 |
| 646084 | Nov 26, 2007 | Nov 26, 2007 | Chesapeake Operating, Inc. | Zapata Townsite GU 5 #150535983 | 14,000 |
| 646084Amendment | Nov 26, 2007 | Nov 26, 2007 | Chesapeake Operating, Inc. | Zapata Townsite GU 5 #150535983 | 14,000 |
| 649682 | Nov 21, 2007 | Nov 21, 2007 | Conocophillips Company | Guerra L #1750536029 | 9,700 |
| 649502 | Nov 16, 2007 | Nov 16, 2007 | Paloma Resources, LLC | Providencia Ranch "A" #A 150536026 | 12,500 |
| 649442 | Nov 16, 2007 | Nov 16, 2007 | L.O.G. Energy Exploration, Ltd. | El Milagro "C" #150536025 | 9,500 |
| 649441 | Nov 16, 2007 | Nov 16, 2007 | L.O.G. Energy Exploration, Ltd. | El Milagro "B" #450536024 | 9,500 |
| 649289 | Nov 15, 2007 | Nov 15, 2007 | Forest Oil Corporation | Haynes "B" #950536023 | 14,600 |
| 649012 | Nov 12, 2007 | Nov 12, 2007 | L.O.G. Energy Exploration, Ltd. | El Milagro "B" #350536021 | 9,500 |
| 648999 | Nov 9, 2007 | Nov 9, 2007 | Forest Oil Corporation | Rodriguez Gas Unit 1 #1650536022 | 14,400 |
| 648848 | Nov 8, 2007 | Nov 8, 2007 | Denali Oil & Gas Management, LLC | Violeta Ranch #150536019 | 16,500 |
| 648695 | Nov 8, 2007 | Nov 8, 2007 | Forest Oil Corporation | Garza D GU 1 #450536017 | 13,300 |
| 648846 | Nov 7, 2007 | Nov 7, 2007 | Chesapeake Operating, Inc. | Vasquez, Romeo J. #1250536018 | 14,000 |
| 648805 | Nov 7, 2007 | Nov 7, 2007 | Conocophillips Company | Villarreal #650536020 | 11,700 |
| 648380 | Nov 7, 2007 | Nov 7, 2007 | Forest Oil Corporation | De Los Santos Gas Unit 1 #1150536011 | 14,700 |
| 648380Amendment | Nov 7, 2007 | Nov 7, 2007 | Forest Oil Corporation | De Los Santos Gas Unit 1 #1150536011 | 14,700 |
| 647397 | Nov 7, 2007 | Nov 7, 2007 | Pogo Producing Company | Sanchez- McMurry #2650536002 | 11,500 |
| 648609 | Nov 5, 2007 | Nov 5, 2007 | Ricochet Energy, Inc. | Tepozan #150536016 | 9,500 |
| 648595 | Nov 5, 2007 | Nov 5, 2007 | Chesapeake Operating, Inc. | Garza #250536015 | 12,000 |
| 648538 | Nov 2, 2007 | Nov 2, 2007 | Petrogas GC, Inc. | State of Texas #150536014 | 16,000 |
| 646510 | Nov 2, 2007 | Nov 2, 2007 | Paloma Resources, LLC | Ramirez "B" #150535990 | 10,300 |
| 648483 | Oct 31, 2007 | Oct 31, 2007 | Paloma Resources, LLC | Ika Ramirez (A. Gonzalez, Jr) #150536013 | 10,200 |
| 648411 | Oct 31, 2007 | Oct 31, 2007 | Conocophillips Company | Jennings Ranch D #3750536012 | 13,400 |
| 647793 | Oct 30, 2007 | Oct 30, 2007 | XTO Energy Inc. | Laurel, F. D. #1250536006 | 14,800 |
| 647335 | Oct 29, 2007 | Oct 29, 2007 | Pogo Producing Company | Haynes, L. #18350536000 | 11,100 |
| 648270 | Oct 26, 2007 | Oct 26, 2007 | Thorp Petroleum Corporation | El Paton #150536010 | 7,200 |
| 648270Amendment | Oct 26, 2007 | Oct 26, 2007 | Thorp Petroleum Corporation | El Paton #150536010 | 7,200 |
| 648204 | Oct 26, 2007 | Oct 26, 2007 | Conocophillips Company | Benavides, C. Y. #250536009 | 9,700 |
| 647916 | Oct 19, 2007 | Oct 19, 2007 | Forest Oil Corporation | Leonardo #4650536008 | 13,300 |
| 647916Amendment | Oct 19, 2007 | Oct 19, 2007 | Forest Oil Corporation | Leonardo #4650536008 | 13,300 |
| 646387 | Oct 19, 2007 | Oct 19, 2007 | Forest Oil Corporation | L. Garza "B" 2 #250532536 | 14,000 |
| 647794 | Oct 18, 2007 | Oct 18, 2007 | Laredo Energy | Haralson Beefmaster, Ltd #250536007 | 12,000 |
| 647756 | Oct 18, 2007 | Oct 18, 2007 | Paloma Resources, LLC | Las Presas-Garcia "A" #B 150536005 | 10,200 |
| 647695 | Oct 17, 2007 | Oct 17, 2007 | Chesapeake Operating, Inc. | Cavazos #850536004 | 14,000 |
| 647633 | Oct 16, 2007 | Oct 16, 2007 | Newfield Exploration Company | Flora E.G. de Volpe Unit #350536003 | 13,000 |
| 647144 | Oct 15, 2007 | Oct 15, 2007 | El Paso E&P Zapata, L.P. | Benavides "A" #1150535999 | 13,200 |
| 647385 | Oct 12, 2007 | Oct 12, 2007 | El Paso E&P Zapata, L.P. | El Clareno #1150536001 | 11,500 |
| 647385Amendment | Oct 12, 2007 | Oct 12, 2007 | El Paso E&P Zapata, L.P. | El Clareno #1150536001 | 11,500 |
| 645379 | Oct 9, 2007 | Oct 9, 2007 | Forest Oil Corporation | Munoz #1650535971 | 14,600 |
| 647093 | Oct 8, 2007 | Oct 8, 2007 | Newfield Exploration Company | Salinas G.U. #150535998 | 13,000 |
| 645374 | Oct 8, 2007 | Oct 8, 2007 | Forest Oil Corporation | Munoz #1550535972 | 14,900 |
| 646997 | Oct 3, 2007 | Oct 3, 2007 | Forest Oil Corporation | Amando Garza Trust #450535997 | 10,500 |
| 646971 | Oct 3, 2007 | Oct 3, 2007 | Chesapeake Operating, Inc. | Vasquez-Pena-Haynes #250535996 | 14,000 |
| 646925 | Oct 3, 2007 | Oct 3, 2007 | Newfield Exploration Company | Gonzalez, Ruben #1150535995 | 15,000 |
| 646825 | Oct 2, 2007 | Oct 2, 2007 | Forest Oil Corporation | Yzaguirre-Leo Gas Unit #1850535994 | 12,500 |
| 646825Amendment | Oct 2, 2007 | Oct 2, 2007 | Forest Oil Corporation | Yzaguirre-Leo Gas Unit #1850535994 | 12,500 |
| 646421 | Oct 1, 2007 | Oct 1, 2007 | Forest Oil Corporation | J.O.D. "1" #1150535989 | 12,500 |
| 646421Amendment | Oct 1, 2007 | Oct 1, 2007 | Forest Oil Corporation | J.O.D. "1" #150535989 | 12,500 |
| 646748 | Sep 28, 2007 | Sep 28, 2007 | El Paso E&P Zapata, L.P. | El Clareno #1050535993 | 11,500 |
| 646741 | Sep 28, 2007 | Sep 28, 2007 | Chesapeake Operating, Inc. | Cuellar Graves Gas Unit #250535992 | 14,000 |
| 646580 | Sep 27, 2007 | Sep 27, 2007 | L.O.G. Energy Exploration, Ltd. | El Milagro "B" #250535991 | 10,500 |
| 646381 | Sep 26, 2007 | Sep 26, 2007 | Killam Oil Co., Ltd. | Abelino #250535988 | 12,820 |
| 645053 | Sep 26, 2007 | Sep 26, 2007 | Pogo Producing Company | Haynes, L. #17950535969 | 10,500 |
| 645053Amendment | Sep 26, 2007 | Sep 26, 2007 | Pogo Producing Company LLC | Haynes, L. #17950535969 | 10,500 |
| 646361 | Sep 25, 2007 | Sep 25, 2007 | Paloma Resources, LLC | Guevara "a" (Laroca) #A 150535987 | 9,200 |
| 646361Amendment | Sep 25, 2007 | Sep 25, 2007 | Paloma Resources, LLC | Guevara "a" (Laroca) #A 150535987 | 9,200 |
| 646293 | Sep 21, 2007 | Sep 21, 2007 | Ricochet Energy, Inc. | Worley Gas Unit #350535986 | 9,500 |
| 646028 | Sep 20, 2007 | Sep 20, 2007 | DCP Intrastate Network, LLC | Singer #150535980 | 320 |
| 646173 | Sep 19, 2007 | Sep 19, 2007 | Conocophillips Company | Jennings Ranch D #3650535985 | 9,000 |
| 646173Amendment | Sep 19, 2007 | Sep 19, 2007 | Conocophillips Company | Jennings Ranch D #3650535985 | 9,000 |
| 646157 | Sep 19, 2007 | Sep 19, 2007 | Legend Natural Gas II, LP | Whittier #650535984 | 15,000 |