Abstract
There are many hydrocarbon generation sags around Dishuiquan Oilfield, such as Dishuiquan Sag, Dongdaohaizi Sag, Wucaiwan Sag, etc. But there is no result which hydrocarbon generation sag the Jurassic oil of Dishuiquan Oilfield is sourced from. Through comparisons on carbon isotopes, sterane distributions and maturities of source rocks and crude oil, the result shows that the geochemical characteristics of Jurassic crude oil in Dishuiquan Oilfield are highly consistent with those of Permian source rocks in Dongdaohaizi Sag and have obvious differences with other sags, which indicates the crude oil comes from the Permian source rocks in Dongdaohaizi Sag.
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