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本文利用显微光度术，对东营凹陷南斜坡沙四段低熟烃源岩有机显微组分进行了分类和定量，研究了凹陷各部位不同深度显微组分的特征、组成和分布，发现小古囊藻在本区某些层段尤其丰富，丛粒藻、盘星藻、渤海藻时有可见，全岩中矿物沥青基质与干酪根中的无定形含量呈正相关，确定了由低等水生生物来源的无定形是本区的主要生油母质之一。利用镜质体反射（Ｒｏ％）与烃类转化率关系，结合藻类热模拟实验，从有机岩石学的角度探讨了低熟烃源岩中有机质的性质、成烃及演化
In this paper, the photomicrographs were used to classify and quantify the organic micro-components of low-maturity source rocks in the fourth slope of the southern slope of Dongying depression. The characteristics, composition and distribution of the micro-components in different depths of various parts of the sag were studied. Microcystis aeruginosa is especially rich in some layers in this area. It can be seen when the coccolith, algae, algae and Bohai Seaweed are positive. The mineral rock matrix in the whole rock is positively correlated with the amorphous content in kerogen, Amorphism from aquatic organisms is one of the major kerogens in this area. Based on the relationship between vitrinite reflectance (Ro%) and hydrocarbon conversion rate and the thermal simulation of algae, the organic matter properties, hydrocarbon generation and evolution in low-maturity source rocks are discussed from the perspective of organic petrology