平庄盆地的石油地质特征

Petroleum geological characteristics of Pingzhuang Basin

为了解平庄盆地烃源岩的赋存特征,结合地质勘查资料,根据沉积学、地球化学理论,分析了该盆地的石油地质特征。结果表明,平庄盆地内发育有三套烃源岩,分别归属九佛堂组、沙海组、阜新组,前两者是构成盆地的主要烃源岩;烃源岩主要形成于半深湖—深湖,部分形成于浅湖、闭塞湖湾及湖沼,其类型以暗色泥岩、油页岩、泥质白云岩等为主;盆地生储盖组合以侧变式为主,油气的圈闭类型主要为断背斜。该结果为平庄盆地的基础地质研究及石油地质勘查提供了参考。

This paper is an effort to investigate the occurrence characteristics of hydrocarbon source rocks occurring in Pingzhuang Basin by analyzing the petroleum geology of the basin, combined with the data of geological exploration and based on sedimentology and geochemistry studies. The results show that, developed in Pingzhuang Basin are three sets of hydrocarbon source rock, classified as Jiufotang Formation, Shahai Formation, and Fuxin Formation, the former two sets of source rocks occurring as the main hydrocarbon source rocks. Hydrocarbon source rocks occurring mainly in the semi-deep lake-deep lake, the part of which is found in shallow lake, occlusion lake-bay, and latchstring bog, are dominated by dark mudstone, shale, argillaceous dolomite, the main source-reservoir-cap rock combinations by side-variant, and oil and gas traps by the type of faulted anticline. The results provides the reference for basic geological studies and petroleum geological exploration in Pingzhuang Basin.