东营凹陷博兴地区烃源岩和油源特征

东营凹陷博兴地区沙河街组第四段上部和第三段中下部发育两套烃源岩 ,其有机地球化学特征 ,尤其是反映沉积环境的生物标志化合物特征有明显的差异。目前已发现的石油大致分为两大类 :高青、博兴油田的原油主要属于源自沙四段烃源岩的“沙四型”原油 ;小营、乔庄、梁家楼、大芦湖油田的原油主要为源自沙三段烃源岩的“沙三型”原油。金家、正理庄、纯化油田的原油混源特征明显。从纵向上看 ,沙三、沙四段中的油气主要来自本层系 ,其他层系的原油主要为混源型原油。

Characteristics of hydrocarbon source rock and oil-source correlation in boxing area of Dongying depression

There are two kinds of main hydrocarbon source rocks in Boxing area, namely the Es 3 and Es 4 source rocks. The organic geochemistry characteristics of them are different. The petroleum found in Boxing area can be approximately divided into two types of the Es 3 oil and Es 4 oil generated from the Es 3 hydrocarbon source rock and the Es 4 hydrocarbon source rock respectively. The oils in the Gaoqing and Boxing oilfields just belong to the Es 4 type, and the oils in the Xiaoying, Qiaozhuang, Liangjialou and Daluhu oilfields belong typically to the Es 3 type. The oils in Chunhua oilfield, Jinjia and Zhenglizhuang oilfields were mainly generated from the Es 3 source rock and Es 4 source rock. The petroleum in the Es 3 and Es 4 sections mainly came from the Es 3 and Es 4 systems, and that of other sections belongs to a mixed type of oil. This kind of mixed source rock shows that in the same pool or in a whole field, the oil may come from the different beds or regions in the different layers and blocks.