Evaluation of Source Rocks of Shanxi Formation of Upper Paleozoic in the East of the North Shaanxi Slope

The source rocks of Shanxi formation of upper Paleozoic in the East of North Shaanxi Slope include mudstone type and coal rock type. In order to accurately evaluate the quality of the two kinds of hydrocarbon source rocks in the study area, sampling and analysis of hydrocarbon source rocks were carry out, and hydrocarbon source rock samples were comprehensively studied from three aspects of organic matter abundance, organic matter type and organic matter maturity. The results show that, the dark mudstone sample of Shanxi formation generally belongs to the category of hydrocarbon source rock. The hydrocarbon source rocks is mainly in the middle- high level with high mature-over mature stage, and its organic matter types are Ⅱ2 and Ⅲ. Coal measure source rock of Shanxi formation is poor in the mature stage and its organic matter type is Ⅲ.