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Source-related geochemical data define at least four petroleum systems in the Jiangling-Dangyang area of the Jianghan Basin. Eocene-Paleocene anoxic evaporitic lacustrine source rocks generated most of the crude oils in the area. Eocene Qianjiang rock from the Sha 13 well (1322 m) contains fast-reacting, sulfur-rich Type IS organic matter, and its extract is most similar to the Sha 13 oil sand...
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