Crude oil samples were collected systematically from the Xifeng Oilfield in Ordos Basin and analyzed by means of high-resolution GC-MS. In this paper, biomarkers of aromatic hydrocarbon in crude oils were studied, and the oil-source correlation and their genesis were investigated. The results show that the studied oils are of the same genetic type, and that alkylnaphthalene and aromatic sulfur compounds are indicative of depositional environment and thermal maturation. The oil-forming matrixes are algae and...
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