试论沾化凹陷上第三系油气成藏与断层的关系

The Effection of Faults on Oil-as Pool Forming in Zhanhua Sag.

庄文山 王永诗

ZHUANG Wen shan WANG Yon shi

胜利油田有限公司 地质科学研究院, 山东 东营 257015

Geology Scientific Research Institute, Shengli Oil Field Ltd., Dongying Shangdong 257062

文章论述了沾化凹陷上第三系油气成藏特征和断层的特征以及大、小两类断层在油气成藏过程中的作用,指出了控凹大断层通过控制上第三系油气来源、圈闭形成及运移路径,从而控制了上第三系油气的运移、聚集和成藏;次级断层可以形成油气的再次运移,在馆陶组上段油气成藏中起着重要的作用。

The characteristics of the hydrocarbon entrapment and evolution of the faults of Neogene System in Zhanhua Sag are studied,and the faults are divided into two types,namely,the large and the small. The effects of the two types of faults in the process of the trapping of oil and gas are respectively discussed in this paper. The large faults dominating the sag control the hydrocarbon migration, collection and entrapment of Neogene System by controlling the hydrocarbon origin, trap forming and migration path of Neogene System. Resulting in the secondary hydrocarbon migration, the secondary faults play an important part in the trapping of oil and gas of the Upper Member of Guantao Formation.