沾化凹陷垦西地区第三系沉积微相研究

Study of Sedimentary Microfacies of the Tertiary in the Kenxi Area, Zhanhua Depression

刘刚 刘建军 史忠生 柳保军

LIU-Gang LIU Jian-jun SHI Zhong-sheng LIU Bao-jun

中国地质大学, 湖北武汉 430074

Petroleum Engineering Department of China University of Geosciences, Wuhan 430074, China

文章以沾化凹陷垦西地区第三系馆陶组Ng2+3, Ng4, Ng5, Ng6, Ng下 砂层组为研究对象,进行沉积微相的分析和研究,提出该地区的主要沉积微相类型有滞留沉积、砂坝沉积、曲流砂坝沉积、天然堤沉积、决口扇沉积、越岸沉积、以及泛滥平原湖泊沉积。储层以河道充填沉积、河道边缘沉积、泛滥平原沉积为主,分布较分散,成藏条件较差。

The paper studies Ng2+3 sand sets, Ng4 sand sets, Ng5 sand sets, Ng6 sand sets, Ng下 sand sets, and member of Kenxi Area in Zhanhua depression. It analyzes the sedimentary microfacies, and proves this zone can be divided into seven sedimentary microfacies: retention sediment, sand bar sediment, bend sand bar sediment, spontaneous bank sediment, burst fan sediment, sloping over sediment, and floodplain lake sediment. The reservoir is mainly made of channel full sediment, channel margin sediment,and floodplain sediment and the distribution of reservoir in this zone is dispersed, and the condition of reservoir formation is not ideal.