Continuing concern about the impacts of atmospheric carbon dioxide on the global climate system provides an impetus for the development of methods for long-term disposal of produced by industrial and other activities. Investigations of the -hydrate properties indicate the feasibility of geologic sequestration as gas hydrate and the possibility of coincident sequestration/ production from natural gas hydrate reservoirs. Numerical studies can provide an integrated understanding of the process mechanisms in predicting the potential and economic viability of gas sequestration, especially when utilizing realistic geological reservoir characteristics in the models. This study numerically investigates possible sequestration of as a stable gas hydrate in various reservoir geological formations. As such, this paper extends the applicability of a previously developed model to more realistic and relevant reservoir scenarios. A unified gas hydrate model coupled with a thermal reservoir simulator (CMG STARS) was applied to simulate -hydrate formation in four reservoir geological formations. These reservoirs can be described as follows. The first reservoir (Reservoir I) is similar to tight gas reservoir with mean porosity 0.25 and mean absolute permeability . The second reservoir (Reservoir II) is similar to a conventional sandstone reservoir with mean porosity 0.25 and mean permeability . The third reservoir (Reservoir III) is similar to hydrate-free Mallik silt with mean porosity 0.30 and mean permeability . The fourth reservoir (Reservoir IV) is similar to hydrate-free Mallik sand with mean porosity 0.35 and mean permeability . The Mallik gas hydrate bearing formation itself can be described as several layers of variable thickness with permeability variations from , and is addressed as a separate part of this study. This paper describes numerical methodology, model input data selection, and reservoir simulation results, including an enhancement to model the effects of ice formation and decay. The numerical investigation shows that the gas hydrate model effectively captures the spatial and temporal dynamics of -hydrate formation in geological reservoirs by injection of gas. Practical limitations to -hydrate formation by gas injection are identified and potential improvements to the process are suggested.
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e-mail: uddin@arc.ab.ca
e-mail: dennis.coombe@cmgl.ca
e-mail: fwright@nrcan.gc.ca
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September 2008
Research Papers
Modeling of -Hydrate Formation in Geological Reservoirs by Injection of Gas
M. Uddin,
e-mail: uddin@arc.ab.ca
M. Uddin
Alberta Research Council Inc.
, 250 Karl Clark Road, Edmonton, AB, T6N 1E4, Canada
Mafiz Uddin (Research Engineer, Alberta Research Council) received his B.Sc. in Civil Engineering (Engineering University, Bangladesh, 1984), M.Sc. in Hydrology (University College Galway, Ireland, 1992), and Ph.D. in Hydrogeology (University New Brunswick, Canada, 1989). He was a Postdoctoral Research Fellow (University of Alberta, Canada), Physical Scientist (CFS, Natural Resources Canada), and Hydrogeologist (Alberta Environment, Canada). He joined the Alberta Research Council in 2001 where he has worked to date.
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D. Coombe,
e-mail: dennis.coombe@cmgl.ca
D. Coombe
Computer Modeling Group Ltd.
, 3512-33 Street, NW, Calgary, AB, T2L 2A6, Canada
Dennis Coombe (Senior Staff Scientist, CMGL) received his B.Sc. in Honours Chemistry (University of Calgary, 1970) and his Ph.D. in Physical Chemistry (University of British Columbia, 1976). After a NATO Postdoctoral Fellowship (University of Leiden, the Netherlands), he joined the Computer Modelling Group in 1980 where he has worked to date. A member of the STARS development team, he is concerned with the maintenance, support, and enhancement of CMG’s thermal and chemical advanced processes’ simulator. He is also an Advisor of enhanced oil recovery field development pilots and university thesis projects worldwide.
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F. Wright
e-mail: fwright@nrcan.gc.ca
F. Wright
Geological Survey of Canada
, Terrain Sciences Division, Box 6000, 9860 West Saanich Road, Sidney, BC, V8L 4B2, Canada
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M. Uddin
Mafiz Uddin (Research Engineer, Alberta Research Council) received his B.Sc. in Civil Engineering (Engineering University, Bangladesh, 1984), M.Sc. in Hydrology (University College Galway, Ireland, 1992), and Ph.D. in Hydrogeology (University New Brunswick, Canada, 1989). He was a Postdoctoral Research Fellow (University of Alberta, Canada), Physical Scientist (CFS, Natural Resources Canada), and Hydrogeologist (Alberta Environment, Canada). He joined the Alberta Research Council in 2001 where he has worked to date.
Alberta Research Council Inc.
, 250 Karl Clark Road, Edmonton, AB, T6N 1E4, Canadae-mail: uddin@arc.ab.ca
D. Coombe
Dennis Coombe (Senior Staff Scientist, CMGL) received his B.Sc. in Honours Chemistry (University of Calgary, 1970) and his Ph.D. in Physical Chemistry (University of British Columbia, 1976). After a NATO Postdoctoral Fellowship (University of Leiden, the Netherlands), he joined the Computer Modelling Group in 1980 where he has worked to date. A member of the STARS development team, he is concerned with the maintenance, support, and enhancement of CMG’s thermal and chemical advanced processes’ simulator. He is also an Advisor of enhanced oil recovery field development pilots and university thesis projects worldwide.
Computer Modeling Group Ltd.
, 3512-33 Street, NW, Calgary, AB, T2L 2A6, Canadae-mail: dennis.coombe@cmgl.ca
F. Wright
Geological Survey of Canada
, Terrain Sciences Division, Box 6000, 9860 West Saanich Road, Sidney, BC, V8L 4B2, Canadae-mail: fwright@nrcan.gc.ca
J. Energy Resour. Technol. Sep 2008, 130(3): 032502 (11 pages)
Published Online: August 8, 2008
Article history
Received:
August 27, 2007
Revised:
March 28, 2008
Published:
August 8, 2008
Citation
Uddin, M., Coombe, D., and Wright, F. (August 8, 2008). "Modeling of -Hydrate Formation in Geological Reservoirs by Injection of Gas." ASME. J. Energy Resour. Technol. September 2008; 130(3): 032502. https://doi.org/10.1115/1.2956979
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