黄河口凹陷古近系烃源岩的地球化学特征

Geochemical characteristics of Paleogene hydrocarbon source rock in Huanghekou Sag

渤海湾盆地黄河口凹陷古近系发育有3套烃源岩,分别是沙三段、沙一至二段和东三段湖相烃源岩.3套烃源岩在整个凹陷内都有分布,岩性以灰色、深灰色、灰黑色以及黑色的泥岩和油页岩为主.沙三段和沙一至二段烃源岩有机质丰度高,有机质类型好,以ⅡA型和ⅡB型为主,有机质正处于生烃的高峰阶段,这2套烃源岩是黄河口凹陷最有利的烃源岩.

There are three sets of paleogene hydrocarbon source rocks (E3s3,E3s1-2 E3d3) in Huanghekou Sag of Bohaiwan Basin.They distribute in the whole sag.The primary lithologies of the hydrocarbon source rocks are gray,dark gray,grayish black and black mud and oil shale.The hydrocarbons source rocks in E3s3 and E3s1-2 have high organic matter abundance,and the organic matter is mainly ⅡA and ⅡB,.The two sets of hydrocarbons source rocks are the most favorable hydrocarbon source rock in Huanghekou Sag.