济阳坳陷沙河街组和孔店组烃源岩地球化学特征

The Geochemical Characteristics of Shahejie Formation and Kongdian Formation Hydrocarbon Source Rocks in the Jiyang Depression

对济阳坳陷沙河街组各个层段的有机质丰度、有机质类型和有机质成熟度进行研究。结果表明:沙三段有机碳含量最高,显示出该段烃源岩品质最好,沙四段次之,孔店组有机碳含量最低,其烃源岩品质最差;沙三、沙四段烃源岩以Ⅰ型干酪根为主,含有少量的Ⅱ型干酪根,孔店组以Ⅲ型干酪根为主;在有机质成熟度方面沙三段、沙四段到孔店组成熟度逐渐增高。

Based on the study and comparison of the source rocks about organic abundance,organic type and degree of organic maturity,we can see the content of organic carbon of Es3 is the highest relatively,followed by Es4 and the content of organic carbon of Kongdian Formation is the lowest.It shows that Es3＇s source rocks is the best and Es4＇s source rocks is the worst;The main types of Hydrocarbon source rock of Es3 and Es4 is Type I kerogen and part by type II.The main types of Kongdian Formation is type III;The maturity of organic matter is rising from Es3 to Kongdian Formation.