Changes

==Indirect type: Lower Silurian Clinton-Medina-Tuscarora, Appalachian Basin==

==Indirect type: Lower Silurian Clinton-Medina-Tuscarora, Appalachian Basin==

The Lower Silurian Clinton-Medina-Tuscarora BCGS, located in the Appalachian basin ([[:file:BasinCenteredGasFig9.jpg|Figure 7]], [[:file:BasinCenteredGasFig10.jpg|Figure 8]]), is one of the better documented examples of an indirect BCGS. Estimates of recoverable resources range from 8.0 to 30.3 tcf.<ref name=Gautieretal_1996>Gautier, D. L., G. L. Dolton, K. I Takahashi, and K. L. Varnes, eds., 1996, 1995 national assessment of United States oil and gas resources-results, methodology, and supporting data: U.S. Geological Survey Digital Data Series DDS-30, RElease 2, 1 CD-ROM.</ref><ref name=Mccormacetal_1996>McCormac, M. P., G. O. Mychkovsky, S. T. Opritza, R. A. Riley, M. E. Wolfe, G. E. Larson, and M. T. Baronoski, 1996, Play Scm: Lower Silurian Cataract/Medina Group ("Clinton") sandstone play, ''in'' J. B. Roen and B. J. Walker, eds., The atlas of major Appalachian gas plays: West Virginia Geological and Economic Survey Publication V-25, p. 156-163.</ref> For additional discussions of the Clinton-Medina-Tuscarora, refer to investigations by Davis,<ref name=Davis_1984 />, Law and Dickinson,<ref name=Lawanddickinson_1985>Law, B. E., and W. W. Dickinson, 1985, [http://archives.datapages.com/data/bulletns/1984-85/data/pg/0069/0008/1250/1295.htm A conceptual model for the origin of abnormally pressured gas accumulations in low-permeability reservoirs]: AAPG Bulletin, v. 69, p. 1295-1304.</ref> Laughrey and Harper,<ref name=Laughreyandharper_1986>Laughrey, C. D., and J. A. Harper, 1996, Play Obe: Upper Ordovician Bald Eagle Formation fractured play, ''in'' J. B. Roen and B. J. Walker, eds., The atlas of major Appalachian gas plays: West Virginia Geological and Economic Survey Publication V-25, p. 164-167.</ref> Zagorski,<ref name=Zagorski_1988>Zagorski, W. A., 1988, Exploration concepts and methodology for deep Medina sandstone reservoirs in northwestern Pennsylvania (abs.): AAPG Bulletin, v. 72, p. 976.</ref><ref name=Zagorski_1991>Zagorski, W. A., 1991, Model of local and regional hydrocarbon traps in the Lower Silurian Medina Sandstone Group, Cooperstown gas field, Crawford and Venango counties, Pennsylvania: M.S. thesis, University of Pittsburgh, Pennsylvania, 132 p.</ref> Law et al.,<ref name=Lawetal_1998a /> Ryder,<ref name=Ryder_1998 /> and Ryder and Zagorski.<ref name=Ryderandzagorski_2003  

The Lower Silurian Clinton-Medina-Tuscarora BCGS, located in the Appalachian basin ([[:file:BasinCenteredGasFig9.jpg|Figure 7]], [[:file:BasinCenteredGasFig10.jpg|Figure 8]]), is one of the better documented examples of an indirect BCGS. Estimates of recoverable resources range from 8.0 to 30.3 tcf.<ref name=Gautieretal_1996>Gautier, D. L., G. L. Dolton, K. I Takahashi, and K. L. Varnes, eds., 1996, 1995 national assessment of United States oil and gas resources-results, methodology, and supporting data: U.S. Geological Survey Digital Data Series DDS-30, RElease 2, 1 CD-ROM.</ref><ref name=Mccormacetal_1996>McCormac, M. P., G. O. Mychkovsky, S. T. Opritza, R. A. Riley, M. E. Wolfe, G. E. Larson, and M. T. Baronoski, 1996, Play Scm: Lower Silurian Cataract/Medina Group ("Clinton") sandstone play, ''in'' J. B. Roen and B. J. Walker, eds., The atlas of major Appalachian gas plays: West Virginia Geological and Economic Survey Publication V-25, p. 156-163.</ref> For additional discussions of the Clinton-Medina-Tuscarora, refer to investigations by Davis,<ref name=Davis_1984 />, Law and Dickinson,<ref name=Lawanddickinson_1985>Law, B. E., and W. W. Dickinson, 1985, [http://archives.datapages.com/data/bulletns/1984-85/data/pg/0069/0008/1250/1295.htm A conceptual model for the origin of abnormally pressured gas accumulations in low-permeability reservoirs]: AAPG Bulletin, v. 69, p. 1295-1304.</ref> Laughrey and Harper,<ref name=Laughreyandharper_1986>Laughrey, C. D., and J. A. Harper, 1996, Play Obe: Upper Ordovician Bald Eagle Formation fractured play, ''in'' J. B. Roen and B. J. Walker, eds., The atlas of major Appalachian gas plays: West Virginia Geological and Economic Survey Publication V-25, p. 164-167.</ref> Zagorski,<ref name=Zagorski_1988>Zagorski, W. A., 1988, Exploration concepts and methodology for deep Medina sandstone reservoirs in northwestern Pennsylvania (abs.): AAPG Bulletin, v. 72, p. 976.</ref><ref name=Zagorski_1991>Zagorski, W. A., 1991, Model of local and regional hydrocarbon traps in the Lower Silurian Medina Sandstone Group, Cooperstown gas field, Crawford and Venango counties, Pennsylvania: M.S. thesis, University of Pittsburgh, Pennsylvania, 132 p.</ref> Law et al.,<ref name=Lawetal_1998a /> Ryder,<ref name=Ryder_1998 /> and Ryder and Zagorski.<ref name=Ryderandzagorski_2003 />

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