Geochemical studies related to the occurrence of oil and gas in the dampier sub-basin,Western Australia |
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| Authors: | TG Powell |
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| Institution: | Bureau of Mineral Resources, Geology and Geophysics, Canberra, A.C.T. Australia |
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| Abstract: | An organic geochemical study has been made of sediments from five petroleum exploration wells and liquid hydrocarbons from seven oil and gas condensate discoveries in the offshore Dampier Sub-basin. Hydrocarbon generation has occurred between 3000 and 4250 m and the probable source rocks have been identified. Oils and condensates in the basin are of two types; a paraffinic-naphthenic type derived from Jurassic source beds and a naphthenic type coming from Cretaceous source sediments. Mixing of the two oil types appears to have occurred in the Egret reservoir. |
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