none 10.1144/GSL.SP.1994.077.01.10 Geological Society of London Geological Society of London 1881 32632903 65091 2024072306091700596 10.1144 2024-07-23T21:05:23Z 2008-04-30T18:24:26Z 9 Geological Society, London, Special Publications SP 0305-8719 2041-4927 05 16 2007 01 1994 77 1 Mark A. Bagge Intera Information Technologies Ltd, Highlands Farm Greys Road, Henley-on-Thames, Oxfordshire RG9 4PS, UK Martin L. Keeley Intera Information Technologies Ltd, Highlands Farm Greys Road, Henley-on-Thames, Oxfordshire RG9 4PS, UK Abstract Geochemical analysis of selected coals indicates that some of the Jurassic coals in Egypt have oil-generating potential. Other coals have just gas potential, but may have already generated oils as they are now post-mature for oil generation. Petrographic analysis of the coals reveals a composition dominated by vitrinite, but with variable liptinite contents and the occurrence of fluorescent vitrinite in some coals. It is not clear which components of the coal are responsible for the oil potential; it is probable that liptinite, hydrogen-rich vitrinites and a fine-grained groundmass of algal origin all contribute. A combination of Rock-Eval Hydrogen Indices and pyrolysis-gc P2 fingerprints provides the best method for determination of the oil- or gas-prone nature of the coals. Attempts at correlating oils to source rock extracts illustrate the problem of oil-source correlations involving a rapidly varying source rock environment. The bitumen extracts from the coals reveal variable characteristics which reflect facies variations in the coals. Several of the coals have unusual saturated hydrocarbon and biological marker distributions that are atypical of humic coals and give a poor correlation to the waxy oils from the Meleiha field. The best oil-source rock correlation is with a carbonaceous shale, not a coal, but it is likely the oils were derived from large volumes of source rock including coals and carbonaceous shales. As the coals have unusual extract characteristics, any oils derived from a more localized environment in the coal swamp may show very unusual geochemical characteristics, and would not be recognized immediately as being derived from terrestrial coals. 01 31 1994 01 1994 183 200 10.1144/GSL.SP.1994.077.01.10 https://doi.org/10.15223/policy-002 10.1144/GSL.SP.1994.077.01.10 https://www.lyellcollection.org/doi/10.1144/GSL.SP.1994.077.01.10 https://www.lyellcollection.org/doi/pdf/10.1144/GSL.SP.1994.077.01.10 http://ebooks.geoscienceworld.org/lookup/doi/10.1144/GSL.SP.1994.077.01.10 Proceedings of the 7th EGPC Exploration Seminar Abu El Naga M. 1984 Abu El Naga M. Paleozoic and Mesozoic depocentres and hydrocarbon generating areas, northern Western Desert 1984 Proceedings of the 7th EGPC Exploration Seminar Cairo American University in Cairo Press Proceedings of the 9th EGPC Exploration Seminar Bagge M. 1988 Bagge M., Harding R., El Azhary T., Said M. Generation of oil from coal sequences in the Western Desert, Egypt 1988 Proceedings of the 9th EGPC Exploration Seminar Cairo Complete Rendu de l’Academic des Sciences, Paris Barthoux J. C. 265 157 1913 Le Jurassic dans le desert l’est l’Ismthe de Suez Barthoux J. C., Douvillé H. Le Jurassic dans le desert l’est l’Ismthe de Suez Complete Rendu de l’Academic des Sciences, Paris 1913 157 265 268 10.1016/0146-6380(84)90071-8 10.1111/j.1747-5457.1990.tb00856.x 10.1111/j.1747-5457.1991.tb00298.x Organic Geochemistry. 15th meeting of the EAOG Moldowan J. M. 1991 Moldowan J. M., Fago F. J., Huizinga B. J., Jacobson S. R. , Manning D. Analysis of oleanane and its occurrence in Upper Cretaceous rocks Organic Geochemistry. 15th meeting of the EAOG 1991 Manchester University Press Poster Abstracts Proceedings of the 6th EGPC Exploration Seminar Parker J. R. 1982 Parker J. R. Hydrocarbon habitat of the Western Desert, Egypt 1982 Proceedings of the 6th EGPC Exploration Seminar Cairo Khattab Press Cairo 10.1016/0146-6380(86)90010-0 Bulletin of Canadian Petroleum Geology Waples D. W. 357 38 1990 Application of sterane and triterpane biomaerks in petroleum exploration Waples D. W., Machihara T. Application of sterane and triterpane biomaerks in petroleum exploration Bulletin of Canadian Petroleum Geology 1990 38 357 380