Abstract: The crude oil obtained from middle Jurassic in Turpan basin is a paraffinic intermediate one with the characteristics of low sulfur content (0.03-0.06%),pristane predominance, relatively heavier value of carbon isotope than conventional oil/and high content of saturated hydrocarbon as well as low contents of non-hydrocarbons and asphaltenes, etc. Based on a correlation study of oil/source rocks, this paper shows that the crude oil are mainly originated from the coal-bearing strata deposited in a Jurassic swampy-deltaic plain environment.

摘要： 吐鲁番盆地原油属低硫(0.03-0.06%)-中间(C₆-C₂₁>5%)-石腊基(7.5-10.4)原油,具有姥鲛烷占明显优势、碳同位素值较一般油偏重、饱和烃含量高、非烃和沥青质含量低等地球化学特征.油源对比认为,生油母质主要来源于侏罗系沼泽-三角洲平原的煤及煤系陆生高等植物.

关键词: 吐鲁番盆地, 侏罗纪, 生油母质, 油源对比, 煤系地层, 原油