惠安堡—马家滩地区二叠系煤系烃源岩

Permian System Coal Hydrocarborn Source Rocks in Huianbu-Majiatan Areas

综合运用有机岩石学、岩石热解分析及有机地球化学等方法,以井下暗色泥岩的分析资料为主,结合地表剖面暗色泥岩样品分析数据,研究和分析了鄂尔多斯西缘惠安堡—马家滩地区二叠系煤系烃源岩的有机质生烃特征、煤系烃源岩的沉积环境。研究表明:太原组、山西组煤系暗色泥岩为二叠系主要的烃源岩层系;有机质类型以Ⅲ型为主。二叠系煤系烃源岩已不同程度进入成熟—高成熟—过成熟阶段。

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.