八屋油气田深层沉积微相研究

Research on the Deep Sedimentary Micro-facies of Bawu Oil-gas Field

以八屋地区营城组、沙河子组地层为研究对象,目的层营城组总体上可分为5个沉积旋回;沙河子组总体上可分为2个沉积旋回。研究区内主要为三角洲和湖泊相沉积,划分出了8种沉积微相类型,描述了主要沉积微相砂体特征,阐明了沉积微相分布规律和时空演化特征以及相模式,为油田的勘探开发提供地质依据。

Through detailed study of the layer of Yingcheng formation and Shahezi formation in Bawu oilfield,the goal layer of Yingcheng formation may be divided into 5 depositional cycles as a whole,which is equal W1,W2,W3,W4 and a W5 subzone that the predecessor separately divided;the layer of Shahezi formation is divided into 2 depositional cycles.In the study area,delta and lacustrine sediments are mainly development,8 sedimentary micro-facies types are recognized and their characteristics are described.Their distribution and evolution are also discussed. Thus, the article has provided the important geological basis for the oil field exploration and development.