Changes

==Direct type: Greater Green River basin==

==Direct type: Greater Green River basin==

The Greater Green River basin, located in southwestern Wyoming ([[:file:BasinCenteredGasFig3.jpg|Figure 1]]), is one of several [[foreland basin]]s in the Rocky Mountain region containing BCGSs. The stratigraphic interval containing the BCGS includes all of the [[Cretaceous]] sequence, locally extending into lower [[Tertiary]] rocks. Stratigraphic correlations of lower Tertiary and Cretaceous rocks in the Greater Green River basin are shown in [[:file:BasinCenteredGasFig5.jpg|Figure 2]]. For a comprehensive discussion of the stratigraphy and structure of the basin see Ryder.<ref name=Ryder_1988>Ryder, R. T., 1998, Greater Green River basin, ''in'' L. L. Sloss, ed., Sedimentary cover-North America craton: The Geology of North America, v. D-2, p. 154-165.</ref> Estimates of in-place gas resources contained in the basin-centered gas accumulation (BCGA) within Cretaceous and Tertiary rocks are as large as 5063 tcf,<ref name=Lawetal_1989>Law, B. E., C. W. Spencer, R. R. Charpentier, R. A. Crovelli, R. F. Mast, G. L. Dolton, and C. J. Wandrey, 1989, Estimates of gas resources in overpressured low-permeability Cretaceous and Tertiary sandstone reservoirs, Greater Green River basin, Wyoming, Colorado, and Utah: 40th Annual Field Conference, Wyoming Geological Association Guidebook, p. 39-61.</ref> and the mean estimate of recoverable gas is 119.3 tcf.<ref name=Law_1996>Law, B. E., 1996, Southwestern Wyoming province (037), ''in'' D. L. Gautier, G. L. Dolton, K. I. Takahashi, and K. L. Varnes, eds., [http://pubs.usgs.gov/dds/dds-030/ 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> Additional references to a BCGS in the Greater Green River basin include publications by Law et al.,<ref name=Lawetal_1979>Law, B. E., C. W. Spencer, and N. H. Bostic, 1979, Preliminary results of organic maturation, temperature, and pressure studies in the Pacific Creek area, Sublette County, Wyoming, ''in'' 5th Department of Energy symposium on enhanced oil and gas recovery and improved drilling methods, v. 3-oil and gas recovery: Tulsa, Oklahoma, Petroleum Publishing, p. K-2/1-K-2/13.</ref><ref name=Lawetal_1980>Law, B. E., C. W. Spencer, and N. H. Bostick, 1980, Evaluation of organic maturation, subsurface temperature, and pressure with regard to gas generation in low-permeability Upper Cretaceous and lower Tertiary strata in the Pacific Creek area, Sublette County, Wyoming: Mountain Geologist, v. 17, no. 2, p. 23-35.</ref> McPeek,<ref name=Mcpeek_1981>McPeek, L. A., 1981, [http://archives.datapages.com/data/bulletns/1980-81/data/pg/0065/0006/1050/1078.htm Eastern Green River basin-a developing giant gas supply from deep, overpressured Upper Cretaceous sandstones]: AAPG Bulletin, v. 65, p. 1978-1098.</ref> Davis,<ref name=Davis_1984>Davis, T. B., 1984, [http://archives.datapages.com/data/specpubs/fieldst4/data/a013/a013/0001/0150/0189.htm Subsurface pressure profiles in gas saturated basins], ''in'' J. A. Masters, ed., Elmworth-case study of a deep basin gas field: AAPG Memoir 38, p. 189-203.</ref> Law,<ref name=Law_1984>Law, B. E., 1984, Relationships of source rocks, thermal maturity, and overpressuring to gas generation and occurrence in low-permeability Upper Cretaceous and lower Tertiary rocks, Greater Green River basin, Wyoming, Colorado, and Utah, ''in'' J. Woodward, F. F. Meissner, and J. L. Clayton, eds., Hydrocarbon source rocks of the greater Rocky Mountain region: Rocky Mountain Association of Geologists Guidebook, P. 469-490.</ref> Keighin et al.,<ref name=Keighinetal_1989>Keighin, C. W. B. E. Law, and R. M. Pollastro, 1989, Petrology and reservoir characteristics of the Almond Formation, Greater Green River basin, Wyoming, ''in'' E. B. Coalson, S. S. Kaplan, C. W. Keighin, C. A. Oglesby, and J. W. Robinson, eds., Petrogenesis and petrophysics of selected sandstone reservoirs of the Rocky Mountain region: Rocky Mountain Association of Geologists, p. 281-294.</ref> Law and Spencer,<ref name=Lawandspencer_1989>Law, B. E., and C. W. Spencer, eds., 1989, Geology of tight gas reservoirs in the Pinedale anticline area, Wyoming and at the Multiwell Experiment site, Colorado: U.S. Geological Survey Bulletin 1886, p. 39-61.</ref> Spencer,<ref name=Spencer_1989b>Spencer, C. W., 1989, Comparison of overpressuring at the Pinedale anticline area, Wyoming, and the Multiwell Experiment site, Colorado, ''in'' B. E. Law and C. W. Spencer, eds., Geology of tight gas reservoirs in the Pinedale anticline area, Wyoming and at the Multiwell Experiment site, Colorado: U.S. Geological Survey Bulletin 1886, 16 p.</ref> Surdam,<ref name=Surdam_1992>Surdam, R. C., 1992, Sandstone geometries, petrophysical characteristics, and pressure regimes, Mesaverde Group, Green River basin, Wyoming, ''in'' C. E. Mullen, ed. Rediscover the Rockies: Wyoming Geological Association Forty-third Field Conference, p. 167-169.</ref> Garcia-Gonzales et al.,<ref name=Garciagonzalesetal_1993a>Garcia-Gonzales, M., D. B. MacGowan, and R. C. Surdam, 1993, Coal as a source rock of petroleum and gas-a comparison between natural and artificial maturation of the Almond Formation coals, Greater Green River basin in Wyoming, ''in'' D. G. Howell, ed., [http://pubs.er.usgs.gov/publication/pp1570 The future of energy gases]: U.S. Geological Survey Professional Paper 1570, p. 405-437.</ref><ref name=Garciagonzalesetal_1993b>Garcia-Gonzales, M., D. B. MacGowan, and R. C. Surdam, 1993, Mechanisms of petroleum generation from coal, as evidenced from petrographic and geochemical studies: Examples from Almond Formation coals in the Greater Green River basin, ''in'' B. Strook and S. Andrew, eds., Wyoming Geological Association Jubilee Anniversary Field Conference Guidebook, p. 311-323.</ref> MacGowan et al.,<ref name=Macgowanetal_1993>MacGowan, D. B., M. Garcia-Gonzales, D. R. Britton, and R. C. Surdam, 1993, Timing of hydrocarbon generation, organic-inorganic diagenesis, and the formation of abnormally pressured gas compartments in the Cretaceous of the Greater Green River basin: A geochemical model, ''in'' B. Strook and S. Andrew, eds., Wyoming Geological Association Jubilee Anniversary Field Conference Guidebook, p. 325-357.</ref> and Surdam et al.<ref name=Surdametal_2001>Surdam, R. C., J. Robinson, Z. S. Jiao, and N. K. Boyd III, 2001, Delineation of Jonah field using seismic and sonic velocity interpretations, ''in'' D. S. Anderson, J. W. Robinson, J. E. Estes-Jackson, and E. B. Coalson, eds., Gas in the Rockies: Rocky Mountain Association of Geologists, p. 189-208.</ref>  

The Greater Green River basin, located in southwestern Wyoming ([[:file:BasinCenteredGasFig3.jpg|Figure 1]]), is one of several [[foreland basin]]s in the Rocky Mountain region containing BCGSs. The stratigraphic interval containing the BCGS includes all of the [[Cretaceous]] sequence, locally extending into lower [[Tertiary]] rocks. Stratigraphic correlations of lower Tertiary and Cretaceous rocks in the Greater Green River basin are shown in [[:file:BasinCenteredGasFig5.jpg|Figure 2]]. For a comprehensive discussion of the stratigraphy and structure of the basin see Ryder.<ref name=Ryder_1988>Ryder, R. T., 1998, Greater Green River basin, ''in'' L. L. Sloss, ed., Sedimentary cover-North America craton: The Geology of North America, v. D-2, p. 154-165.</ref> Estimates of in-place gas resources contained in the basin-centered gas accumulation (BCGA) within Cretaceous and Tertiary rocks are as large as 5063 tcf,<ref name=Lawetal_1989>Law, B. E., C. W. Spencer, R. R. Charpentier, R. A. Crovelli, R. F. Mast, G. L. Dolton, and C. J. Wandrey, 1989, Estimates of gas resources in overpressured low-permeability Cretaceous and Tertiary sandstone reservoirs, Greater Green River basin, Wyoming, Colorado, and Utah: 40th Annual Field Conference, Wyoming Geological Association Guidebook, p. 39-61.</ref> and the mean estimate of recoverable gas is 119.3 tcf.<ref name=Law_1996>Law, B. E., 1996, Southwestern Wyoming province (037), ''in'' D. L. Gautier, G. L. Dolton, K. I. Takahashi, and K. L. Varnes, eds., [http://pubs.usgs.gov/dds/dds-030/ 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> Additional references to a BCGS in the Greater Green River basin include publications by Law et al.,<ref name=Lawetal_1979>Law, B. E., C. W. Spencer, and N. H. Bostic, 1979, Preliminary results of organic maturation, temperature, and pressure studies in the Pacific Creek area, Sublette County, Wyoming, ''in'' 5th Department of Energy symposium on enhanced oil and gas recovery and improved drilling methods, v. 3-oil and gas recovery: Tulsa, Oklahoma, Petroleum Publishing, p. K-2/1-K-2/13.</ref><ref name=Lawetal_1980>Law, B. E., C. W. Spencer, and N. H. Bostick, 1980, Evaluation of organic maturation, subsurface temperature, and pressure with regard to gas generation in low-permeability Upper Cretaceous and lower Tertiary strata in the Pacific Creek area, Sublette County, Wyoming: Mountain Geologist, v. 17, no. 2, p. 23-35.</ref> McPeek,<ref name=Mcpeek_1981>McPeek, L. A., 1981, [http://archives.datapages.com/data/bulletns/1980-81/data/pg/0065/0006/1050/1078.htm Eastern Green River basin-a developing giant gas supply from deep, overpressured Upper Cretaceous sandstones]: AAPG Bulletin, v. 65, p. 1978-1098.</ref> Davis,<ref name=Davis_1984>Davis, T. B., 1984, [http://archives.datapages.com/data/specpubs/fieldst4/data/a013/a013/0001/0150/0189.htm Subsurface pressure profiles in gas saturated basins], ''in'' J. A. Masters, ed., Elmworth-case study of a deep basin gas field: [http://store.aapg.org/detail.aspx?id=67 AAPG Memoir 38], p. 189-203.</ref> Law,<ref name=Law_1984>Law, B. E., 1984, Relationships of source rocks, thermal maturity, and overpressuring to gas generation and occurrence in low-permeability Upper Cretaceous and lower Tertiary rocks, Greater Green River basin, Wyoming, Colorado, and Utah, ''in'' J. Woodward, F. F. Meissner, and J. L. Clayton, eds., Hydrocarbon source rocks of the greater Rocky Mountain region: Rocky Mountain Association of Geologists Guidebook, P. 469-490.</ref> Keighin et al.,<ref name=Keighinetal_1989>Keighin, C. W. B. E. Law, and R. M. Pollastro, 1989, Petrology and reservoir characteristics of the Almond Formation, Greater Green River basin, Wyoming, ''in'' E. B. Coalson, S. S. Kaplan, C. W. Keighin, C. A. Oglesby, and J. W. Robinson, eds., Petrogenesis and petrophysics of selected sandstone reservoirs of the Rocky Mountain region: Rocky Mountain Association of Geologists, p. 281-294.</ref> Law and Spencer,<ref name=Lawandspencer_1989>Law, B. E., and C. W. Spencer, eds., 1989, Geology of tight gas reservoirs in the Pinedale anticline area, Wyoming and at the Multiwell Experiment site, Colorado: U.S. Geological Survey Bulletin 1886, p. 39-61.</ref> Spencer,<ref name=Spencer_1989b>Spencer, C. W., 1989, Comparison of overpressuring at the Pinedale anticline area, Wyoming, and the Multiwell Experiment site, Colorado, ''in'' B. E. Law and C. W. Spencer, eds., Geology of tight gas reservoirs in the Pinedale anticline area, Wyoming and at the Multiwell Experiment site, Colorado: U.S. Geological Survey Bulletin 1886, 16 p.</ref> Surdam,<ref name=Surdam_1992>Surdam, R. C., 1992, Sandstone geometries, petrophysical characteristics, and pressure regimes, Mesaverde Group, Green River basin, Wyoming, ''in'' C. E. Mullen, ed. Rediscover the Rockies: Wyoming Geological Association Forty-third Field Conference, p. 167-169.</ref> Garcia-Gonzales et al.,<ref name=Garciagonzalesetal_1993a>Garcia-Gonzales, M., D. B. MacGowan, and R. C. Surdam, 1993, Coal as a source rock of petroleum and gas-a comparison between natural and artificial maturation of the Almond Formation coals, Greater Green River basin in Wyoming, ''in'' D. G. Howell, ed., [http://pubs.er.usgs.gov/publication/pp1570 The future of energy gases]: U.S. Geological Survey Professional Paper 1570, p. 405-437.</ref><ref name=Garciagonzalesetal_1993b>Garcia-Gonzales, M., D. B. MacGowan, and R. C. Surdam, 1993, Mechanisms of petroleum generation from coal, as evidenced from petrographic and geochemical studies: Examples from Almond Formation coals in the Greater Green River basin, ''in'' B. Strook and S. Andrew, eds., Wyoming Geological Association Jubilee Anniversary Field Conference Guidebook, p. 311-323.</ref> MacGowan et al.,<ref name=Macgowanetal_1993>MacGowan, D. B., M. Garcia-Gonzales, D. R. Britton, and R. C. Surdam, 1993, Timing of hydrocarbon generation, organic-inorganic diagenesis, and the formation of abnormally pressured gas compartments in the Cretaceous of the Greater Green River basin: A geochemical model, ''in'' B. Strook and S. Andrew, eds., Wyoming Geological Association Jubilee Anniversary Field Conference Guidebook, p. 325-357.</ref> and Surdam et al.<ref name=Surdametal_2001>Surdam, R. C., J. Robinson, Z. S. Jiao, and N. K. Boyd III, 2001, Delineation of Jonah field using seismic and sonic velocity interpretations, ''in'' D. S. Anderson, J. W. Robinson, J. E. Estes-Jackson, and E. B. Coalson, eds., Gas in the Rockies: Rocky Mountain Association of Geologists, p. 189-208.</ref>  

===General characteristics of the Greater Green River basin BCGS===

===General characteristics of the Greater Green River basin BCGS===