Abstract:

Aromatics and heterocyclic compounds of crude oils and source rocks fromTertiary saline facies of Jianghan Basin in Hubei, Dongpu Depressionof Henan and Jinxian Sag of Hebei have been identified by GCMS techni-que. Crude oil of the Dongpu Depression is rich in phenanthrene, naphtha-lene and chrysene, and is similar to that of fresh water lake facies; the crudeoil and source rocks of the Jinxian Sag are dominant in dibenzothiophe-ne, and highly sulfur-bearing oil from the Jianghan Basin is characterizedby abundant Long-chain alkylthiophene and thiolanes. The relative compo-sition of fluorenes, dibenzofurans and dibenzothiophenes may be used asgood markers of depositional environment. Finally the article discusses therelation between some indexes of aromatics and maturity of crude oil.