Permian System Coal Hydrocarborn Source Rocks in Huianbu-Majiatan Areas

The hydrocarbon-generating features of the organic matters contained in Permian dark mudstones in Huianbu-Majiatan Areas on the western margin of the Ordos Basin are researched.On the basis of the analyzing geochemical data of the darkmudstones on outcrop sections and borehole specimens by means of organic petrology,rock-evel,geochemistry,the comprehensive test,the sedimentary environments of coal hydrocarbon source rocks are discussed.The study shows that the dark mud-stones in Taiyuan and Shanxi Formations are main kind of hydrocarbon source rocks in Permian system,most of the organic metters are type Ⅲ,and the organic matters have come into the maturity to higher maturity stage respectively.