Abstract: Most information about the source rocks in Qiangtang basin are originally taken from analytical data of the outcrops. This paper presents correlation and analysis of the characteristics of the source rocks in Qiangzi-2 well and on the surface in Zharen area in southern Qiangtang depression. And some differences of source rocks between them are revealed in lithology, organic matter's abundance, type and maturity, etc. The result shows that the content of organic carbon of Qiangzi-2 well is higher than that on the surface condition, and the type of organic matter is dominated by Type II1 kerogen, very little with Type II2 kerogen, and also the evolution degree of organic matter is obviously low. It is concluded that the source rocks in Qiangtang basin is of very good potential of hydrocarbon generation. This is significant to the proper evaluation of the source rocks in Qiangtang basin.

Key words: Qiangtang basin, southern Qiangtang depression, Buqu formation, source rock, evaluation