准噶尔盆地滴南地区原油地球化学特征及油源

对准噶尔盆地东道海子凹陷滴南地区的滴南1、滴南7、滴南8等井原油与烃源岩地球化学特征分析，探论该区油源关系。通过对原油的族组成、碳同位素、饱和烃色谱、甾萜烷化合物及轻烃参数、烃源岩的生物标志化合物的研究，结果表明：东道海子凹陷二叠系平地泉组烃源岩处于低成熟－成熟阶段，三环萜烷含量高，Ts＜Tm，γ蜡烷含量低，甾烷中 C27、C28、C29呈反“L”形分布。滴南地区二叠系原油和储层抽提物地球化学参数及甾萜烷特征与平地泉组烃源岩相似，具有亲缘关系。侏罗系原油具有侏罗系烃源岩来源的特征。

Geochemical characteristics of crude oil and oil source analysis in the Dinan area of Dongdaohaizi Sag,Junggar Basin,China

The geochemical characteristics of crude oil and source rocks from the drilling wells of Well Dinan-1,Well Dinan-7,Well Dinan-8 in the Dinan area of Dongdaohaizi Sag in Junggar Basin are analyzed,and the oil-source relationship is also discussed.Focus is put on the research of oil group composition,oil carbon isotope,oil saturated chromatographic feature and parameters analysis of oil steroid terpane compounds,light hydrocarbon,as well as biomarker of the source rock.It shows that the hydrocarbon source rock of Permian Pingdiquan Formation in Dongdaohaizi Sag is in the immature to mature phase,with high tricyclic terpane content,low gammacerane content,Ts/Tm less than 1, and reverse “L”shape in the distribution of C27 ,C28 ,C29 regular sterane fingerprint.The geochemical parameter and steroid terpane characteristics from the crude oil and the reservoir material extracted in the Permian in Dinan area are similar to those of the source rocks in Pingdiquan Formation.The Jurassic crude oil is characterized by the Jurassic source rock.