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E & P NOTES |
1 Center for Sedimentary Basin Studies and Department of Geological Sciences, University of Alabama, Tuscaloosa, Alabama 35487; emancini{at}geo.ua.edu
2 Arkansas Geological Survey, Little Rock, Arkansas 72204; peng.li{at}arkansas.gov
3 Center for Energy Studies, Louisiana State University, Energy, Coast & Environment Building, Baton Rouge, Louisiana 70803; dgodda1{at}lsu.edu
4 Center for Sedimentary Basin Studies and Department of Geological Sciences, University of Alabama, Tuscaloosa, Alabama 35487; present address: ECOPETROL, Bogotá, Colombia; victor.ramirez{at}ecopetrol.com.co
5 Baseline Resolution, Inc., 143 Vision Park Blvd., Shenandoah, Texas 77384; stalukdar{at}baselinelabs.com
Ernest A. Mancini is a Distinguished Research Professor in petroleum geology and stratigraphy in the Department of Geological Sciences and director of the Center for Sedimentary Basin Studies at the University of Alabama. His research focus is on sequence stratigraphy, sedimentary basin analysis, petroleum system studies, and reservoir characterization and modeling.
Peng Li obtained his Ph.D. in geology from the University of Alabama (2007) and has recently joined the Arkansas Geological Survey as a senior fossil fuel geologist. His research accomplishments include petroleum system analysis, basin modeling, and resource assessment. Currently, his research focuses on unconventional gas reservoir studies in the Arkoma Basin.
Donald A. Goddard is an associate professor and petroleum researcher at Louisiana State University's Center for Energy Studies (CES). His tasks at CES involve integrated field studies in mature petroleum regions of the Gulf Coast as well as identifying and transferring upstream technologies to independent operators through the programs of the Petroleum Technology Transfer Council.
Victor O. Ramirez is an exploration geologist for Ecopetrol S.A. in Colombia. He obtained a B.A. degree in geology from the National University of Colombia in 1993 and an M.S. degree from the University of Alabama in 2007. His work and research focus on sequence and seismic stratigraphy and petroleum systems as applied to hydrocarbon exploration in Colombia.
Suhas C. Talukdar is a geologist and geochemist with more than 35 years of professional experience in industry, research, and teaching. He received his Ph.D. in geology from Rice University in 1973. His expertise is in petroleum geochemistry, basin modeling, petroleum system analysis, and hydrocarbon charge assessment for plays, prospects, and integrated basin studies. He is presently a senior geochemist with Baseline Resolution, Inc.
ABSTRACT
The Mesozoic (Upper Jurassic–Lower Cretaceous) deeply buried gas reservoir play in the central and eastern Gulf coastal plain of the United States has high potential for significant gas resources. Sequence-stratigraphic study, petroleum system analysis, and resource assessment were used to characterize this developing play and to identify areas in the North Louisiana and Mississippi Interior salt basins with potential for deeply buried gas reservoirs. These reservoir facies accumulated in Upper Jurassic to Lower Cretaceous Norphlet, Haynesville, Cotton Valley, and Hosston continental, coastal, and marine siliciclastic environments and Smackover and Sligo nearshore marine shelf, ramp, and reef carbonate environments. These Mesozoic strata are associated with transgressive and regressive systems tracts. In the North Louisiana salt basin, the estimate of secondary, nonassociated thermogenic gas generated from thermal cracking of oil to gas in the Upper Jurassic Smackover source rocks from depths below 3658 m (12,000 ft) is 4800 tcf of gas as determined using software applications. Assuming a gas expulsion, migration, and trapping efficiency of 2–3%, 96–144 tcf of gas is potentially available in this basin. With some 29 tcf of gas being produced from the North Louisiana salt basin, 67–115 tcf of in-place gas remains. Assuming a gas recovery factor of 65%, 44–75 tcf of gas is potentially recoverable. The expelled thermogenic gas migrated laterally and vertically from the southern part of this basin to the updip northern part into shallower reservoirs to depths of up to 610 m (2000 ft).
This article has been cited by other articles:
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  E. Mancini, E. A. Mancini, J. Obid, M. Badali, K. Liu, and W. C. Parcell Sequence-stratigraphic analysis of Jurassic and Cretaceous strata and petroleum exploration in the central and eastern Gulf coastal plain, United States AAPG Bulletin, December 1, 2008; 92(12): 1655 - 1686. [Abstract] [Full Text] [PDF]
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