Abstract
It is remarkable that the origins of the coal-associated gases in the Sydney and Bowen Basins should have been so generally and consistently misunderstood. These gases occur at depths to some 600 m, vary widely in composition and most commonly occur as mixtures of very dry methane with carbon dioxide in all proportions. The origins of these gases remain in doubt, although a thermal maturation mechanism was initially agreed. Up-lifting and erosion have resulted in the loss of the bulk of this early-formed wet thermogenic gas. It has been almost completely displaced by very dry methane and now remains as traces in seam-enclosing sandstones and in the deepest coal measures. A biogenic origin, largely via carbon dioxide reduction, is often assigned to gases of this type. However in these Basins higher temperatures associated with hydrothermal activity, and anomalies in the behaviour of carbon dioxide, appear likely to curtail biogenic activity and suggest alternative gas sources.
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References
Couch, G.R. (1987) Biotechnology and coal, I.E.A.Coal Research, 7–56.
Faiz, M.M. and Hutton, A.C. (1997) Coal seam gas in the Southern Sydney Basin, New South Wales, Australian Petroleum Production and Exploration Association Journal, 415–428.
Glikson, M., Boreham, C.J., and Theide, D. (1998) Coal composition, temperature and heating rates: a determining factor in hydrocarbon species generated and prediction of primary/secondary migration, Abstracts of Papers, International Conference on Coal Seam Gas and Oil, Brisbane, Australia, March 2325.
Golding, S.D., Boreham, C.J., Uysal, I.T., Baublys, K.A. and Glikson, M. (1998) Source and timing of coal seam gas generation in Bowen Basin coals, Abstracts of Papers, International Conference on Coal Seam Gas and Oil, Brisbane, Australia, March 23–25.
Gould, K.W., Hart, G.N. and Smith, J.W. (1981) Technical Note: Carbon Dioxide in the Southern Coalfields N.S.W., Proceedings of the Australasian Institute Of Mining and Metallurgy 279, 41–42.
Gould, K.W., Hart, G.N. and Smith, J.W. (1982) Gas Prospecting, Investigation Report 1336R CSIRO Division of Coal Research, 8p.
Hargraves, A.J. (1962) Gas in face coal, Proceedings of the Australasian Institute of Mining and Metallurgy 203, 7–43.
Hargraves, A.J. (1963) Some variations in the Bulli Seam, Proceedings of the Australasian Institute of Mining and Metallurgy 208, 251–283.
Hart, G. and Smith, J.W. (1981) Gas Prospecting, Investigation Report 1256R CSIRO Division of Coal Research, 5p.
Kharaka, Y., Carothers, W. and Rosenbauer, R.J. (1983) Thermal decarboxylation of acetic acid:implications for origin of natural gas, Geochimica et Cosmochimica Acta 47, 379–402.
Kotarba, M.J. and Rice, D.D. (1995) Microbial methane and endogenic carbon dioxide in Lower Silesian Coal Basin, SW Poland; in Lama, R.D.(ed) High Gas Emissions and Outbursts in Underground Mines. Australian Coal Association, Wollongong, NSW, Australia.
Rice, D.D. (1993) Compositions and origins of coalbed gas; in Law, B.E. and Rice, D.D.(eds) Hydrocarbons from Coal, AAPG Studies in Geology 38, 159–184.
Sackett, W.M. and Chung, H.M. (1979) Experimental confirmation of the lack of carbon isotope exchange between methane and carbon oxides at high temperatures, Geochimica et Cosmochimica Acta 43, 273–276.
Scott, A.R., Kaiser, W.R. and Ayers, W.B. (1994) Thermogenic and secondary biogenic gases, San Juan Basin, Colorado and New Mexico Implications for Coalbed Gas Producibility, American Association of Petroleum Geologists Bulletin 78, 1186–1209.
Smith, J.W., Gould, K.W. and Rigby, D. (1982) The stable isotope geochemistry of Australian coals, Organic Geochemistry 3, 111–131.
Smith, J.W., Gould, K.W., Hart, G. and Rigby, D. (1985) lsotopic studies of Australian natural and coal seam gases, Proceedings of the Australasian Institue of Mining and Metallurgy 290, 43–51.
Smith, J.W. and Pallasser, R.J. (1993) Microbial origin of coal seam methane, Abstracts of Papers 206th ACS National Meeting, Chicago, Part 1, GEOC 79.
Smith, J.W. and Pallasser, R.J. (1995) CO2–A key factor in gas characterization, in J.A. Pajares and J.M.D. Tascon, Coal Science, Amsterdam, Elsevier Science.Vol 1, 91–94.
Smith, J.W., Pallasser., R.J. and Pang, L.S.K. (1998) Thermal reactions of acetic acid “C/’C partitioning between CO2 and CH„ Organic Geochemistry (in press).
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Smith, J.W. (1999). The Development of an Understanding of the Origins of the Sydney and Bowen Basin Gases. In: Mastalerz, M., Glikson, M., Golding, S.D. (eds) Coalbed Methane: Scientific, Environmental and Economic Evaluation. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-1062-6_16
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DOI: https://doi.org/10.1007/978-94-017-1062-6_16
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