Abstract
Experimental and numerical investigations were conducted to study adsorption and desorption of pure and multicomponent gas on coal, and the sorption-induced volumetric strain and permeability change of the coal. This paper presents the experimental work. Using CO\(_2\), N\(_2\), and CO\(_2\) and N\(_2\) binary mixtures of different composition as injection gases, the measurements were conducted on a cylindrical composite coal core at varying pore pressures and constant effective confining pressure. Sorption was measured using a volumetric method. The initial and equilibrium system pressure and gas phase composition were measured. The total amount of adsorption and the composition of the adsorbed phase (for adsorption of binary gas mixtures) were calculated based on material balance. During the process of sorption, the volume of the core was monitored by recording the volume of the water in the confining pressure vessel. Sorption-induced strain was calculated as the ratio of the sorption-induced volumetric change to the initial volume of the core. After adsorption equilibrium was reached, the permeability of the core was measured based on the Darcy equation for gas flow. Sorption and permeability measurements were conducted for each test gas at first increasing and then decreasing pressures. Volumetric strain was only measured while pore pressure increased. To our knowledge, this is the first study measuring adsorption, volumetric strain, and permeability on the same piece of core with the same apparatus.
References
Adamson, A.W., Gast, A.P.: Physical Chemistry of Surfaces, 6th edn. Wiley, New York (1997)
Ares, Y., Barron, K.: The effect of gas sorption on the strength of coal. Mining Sci. Technol. 6, 291–300 (1998)
Bird, R. B., Stewart, W. E., and Lightfoot, E. N.: Transport Phenomena, Wiley, ISBN: 0 471 07392 X (1960)
Gray, I.: Reservoir engineering in coal seams: part 1—the physical process of gas storage and movement in coal seams. SPE Reserv. Eng. 2(1), 28–34 (1987)
Hagin, P., Zoback, M. D.: Laboratory studies of the compressibility and permeability of low-rank coal samples from the Powder River Basin, Wyoming, USA, Paper 10–170, 44th U.S. rock mechanics symposium and 5th U.S—Canada rock mechanics symposium, Salt Lake City, Utah, 27–30 June 2010
Hall, F.E., Zhou, C. H., Gasem, K.A.M., Robinson, R. L., Jr., Yee, D.: Adsorption of pure methane, nitrogeon, and carbon dioxide and their binary mixtures on wet fruitland coal. Paper SPE 29194 presented at eastern regional conference and exhibition held at Chariston, WV, U.S.A. 8–10 Nov 1994
Harpalani, S., Zhao, X.: The unusual response of coal permeability to varying gas pressure and effective stress In: The 30th U.S. symposium on rock mechanics (USRMS), Morgantown, WV, 19–22 June 1989
Harpalani, S., McPherson, M.J.: Retention and release of methane in underground coal working. Geotech. Geol. Eng. 4, 217–233 (1986)
Jahediesfanjani, H., Civan, F.: Damage tolerance of well-completion and stimulation techniques in coalbed methane reservoirs. J. Energy Res. Technol. 127(3), 248–256 (2005)
Jessen, K., Tang, G.-Q., Kovscek, A.R.: Laboratory and simulation investigation of enhanced coalbed methane recovery by gas injection. Transp. Porous Media 73(2), 141–159 (2008). doi:10.1007/s11242-007-9165-9
Katz, D.L.V., Lee, R.L.: Natural Gas Engineering: Production and Storage. McGraw-Hill, New York (1990)
Klinkenberg, L.J.: The Permeability of Porous Media to Liquids and Gases, Drilling and Production Practice. American Petroleum Institute, Washington, D.C. (1941)
Lake, L. W.: Enhanced Oil Recovery, Prentice-Hall Inc, Upper Saddle River, ISBN: 0-13-281601-6 (1989)
Lin, W., Tang, G.Q., Kovscek, A.R.: Sorption-induced permeability change of coal during gas-injection processes. Reserv. Eval. Eng. 11(4), 792–802 (2008)
McKee, C.R., Bumb, A.C., Koenig, R.A.: Stress-dependent permeability and porosity of coal. In: Fassett, J.E. (ed.) Geology and Coal-Bed Methane Resources of the Northern San Juan Basin, pp. 143–153. San Juan Basin, Colorado and New Mexico (1988)
Mineral Planning Factsheet: Coal and Coalbed Methane, British Geological Survey, October (2006)
Pan, Z., Connell, L.D., Camilleri, M.: Laboratory characterisation of coal reservoir permeability for primary and enhanced coalbed methane recovery. Int. J. Coal Geol. 82, 252–261 (2010)
Pan, Z., Connell, L.D.: Modelling permeability for coal reservoirs: a review of analytical models and testing data. Int. J. Coal Geol. 92, 1–44 (2012)
Reid, R.C., Prausnitz, J.M., Poling, B.E.: The Properties of Gases and Liquids, 4th edn. McGraw Hill Inc., New York (1987)
Talu, O.: Needs, status, techniques and problems with binary gas adsorption experiments. Adv Colloid Interface Sci 76–77, 227–269 (1998)
Tanikawa, W., Shimamoto, T.: Klinkenberg effect for gas permeability and its comparison to water permeability for porous sedimentary rocks. Hydrol. Earth Syst. Sci. Dis. 3(4), 1315–1338 (2006)
Thomas, L.: Coal Geology. Wiley, England, pp. 79–106 and 260 (2002)
Yang, R.T.: Gas Separation by Adsorption Processes. Butterworths Publishers, London (1987)
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This paper was prepared with the support of the Global Climate and Energy Project (GCEP). This support is gratefully acknowledged. However, any opinions, findings, conclusions, or recommendations expressed herein are those of the author and do not necessarily reflect the views of GCEP and its supporters.
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Lin, W., Kovscek, A.R. Gas Sorption and the Consequent Volumetric and Permeability Change of Coal I: Experimental. Transp Porous Med 105, 371–389 (2014). https://doi.org/10.1007/s11242-014-0373-9
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DOI: https://doi.org/10.1007/s11242-014-0373-9