华北盆地南部二叠系烃源岩特征研究

Characteristics of Hydrocarbon Source Rocks in the Permian of Southern Area of North China Basin

华北南部地区二叠系主要有3套烃源岩:太原组、山西组和石盒子组煤系烃源岩.烃源岩在周口凹陷、太康隆起和豫西地区均有分布。各类烃源岩的展布总体呈现为东部最厚,西部次之。岩性主要为暗色泥岩、煤和碳质泥岩。最有利的烃源岩为二叠系的太原组和山西组。有机质丰度高、类型好。烃源岩类型以腐植型为特征,型干酪根为主,灰岩干酪根以2型为主。成熟度以成熟-过成熟为主。

There are three sets of Permian source rock in the southern part of the north China region: the Permian Taiyuan, Shanxi and Shihezi members. The source rocks are distributed in the Zhoukou depression,the Taikang rise and west Henan province. The source rocks of dark mudstone, coal and carboniferous mud stone are thicker in the east and thinner in the west in their thickness. The source rocks in the Taiyuan and Shanxi members probably represent the best in the study area since they contain abundant organic carbon.Most of the organic substances belong to type Ⅱ and the limestone are type Ⅲ.