Abstract: Microscopic components and hydrocarbon generation model of Jurassic source rocks in Santanghu Basin, Xinjiang are studied by using the whole rock analytical method of organic petrology. The results show the source rocks in Santanghu Basin contain rich vitrinite and poor sapropelinite. However, exinite and sapropelinite are relatively concentrated in source rocks of the lower part of Xishanyao formation. The content and composition of exinite and sapropelinite determine the hydrocarbon-generating feature and potential of source rocks. The model of oil generation from coal in Jurassic in Santanghu Basin is obviously different from that in Tuha Basin. It is suggested that the reflectance of vitrinite (Ro) in the beginning of oil formation is about 0.5% and oil generated from coal is mainly contributed by sporinite and cutinite.

Key words: Oil generated from coal, Maceral, Hydrocarbon generation model, Source rocks, Jurassic period