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松辽盆地南部长岭地区主要分布有上白垩统嫩江组和青山口组、下白垩统登娄库组和沙河子组-营城组烃源岩。介绍了长岭地区主要烃源岩的分布特征、有机质丰度、类型及热演化程度,描述了烃源岩中有机质族组成特征、饱和烃气相色谱特征、甾烷、三萜烷系列化合物分布特征及稳定碳同位素组成特征等,并根据这些地球化学特征分析了不同层位烃源岩的母质类型、生烃环境及有机质演化规律。
The Upper Cretaceous Nenjiang Formation, Qingshankou Formation, Lower Cretaceous Denglouku Formation and Shahezi Formation - Yingcheng Formation source rocks are mainly distributed in Changling area, southern Songliao Basin. This paper introduces the distribution characteristics, abundances, types and thermal evolution of major source rocks in Changling area. It describes the characteristics of organic-genealogical composition, gas chromatographic characteristics of saturated hydrocarbons, the distribution characteristics of steranes and triterpenes in the source rocks And stable carbon isotopic compositions. Based on these geochemical characteristics, the types of parent materials, hydrocarbon generation environment and evolution of organic matter in different layers of source rocks are analyzed.