Facies recognition of some Tertiary coals applied to prediction of oil source rock occurrence |
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| Authors: | S Thompson RJ Morley PC Barnard BS Cooper |
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| Institution: | Robertson Research International Limited, Týn-y-Coed, Llanrhos, Llandudno, Gwynedd, LL30 1SA, UK;B.S. Cooper and Associates, The Beeches, Byfield Road, Chipping Warden, Nr Banbury, OX17 1LD, UK |
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| Abstract: | Coals are oil source rocks in many of the Tertiary basins of Southeast Asia. The precursors of these hydrogen rich and oxygen poor coals are coastal plain peats which have mainly developed in an everwet and tropical climate. In these environments water flow and reworking can concentrate liptinitic kerogen in preference to vitrinitic kerogen. The distribution, petrography and chemistry of the coaly Miocene source rocks present in the Kutai Basin are described. The recognition of environmental controls on the accumulation of potentially oil-prone coals and coaly shales in deltaic environments is an aid to predictive source bed recognition in petroleum exploration. Comments on the environment of deposition of coaly sediments in the basins of the Norwegian Sea are discussed with reference to their possible oil and/or gas sourcing potential. The Triassic - Jurassic coals of the Haltenbanken area may become more oil-prone towards the delta margins, and facies mapping could aid oil exploration in this area. |
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| Keywords: | Facies recognition Tertiary coals Oil source rocks |
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