浅谈吴起油田阳沟区延10油层沉积微相类型与特征

A Brief Talk on Sedimentary Microfacies Types and Characteristics of Yan 10 Reservoir in Yanggou District,Wuqi Oilfield

阳沟地区早侏罗世受北西向物源的影响,经历了辫状河—曲流河演化阶段,不同沉积期具有不同的沉积相展布特征.阳沟地区延安组延10油层组主要为河流沉积体系.根据其沉积特征,可分为辫状河和曲流河,又可细分为河道亚相、堤岸亚相和河漫亚相3种亚相,其中河道亚相主要包括心滩、边滩微相,堤岸亚相包括天然堤微相,河漫亚相包括河漫滩、河漫沼泽等微相.

He early Jurassic period in Yanggou area was influenced by the North and West direction of the object source and experienced the evolution phase of the braided river to Quliuhe. Different sedimentary periods have different sedimentary facies. Yanan Formation in Yanggou area is mainly composed of river sedimentary system. According to its sedimentary characteristics,it can be divided into braided rivers and curved rivers,and it can be subdivided into three subphases:river subfacies,embankment subfacies, and river subfacies. Among them,river subfacies mainly include the heart beach and the edge beach microfacies. Subfacies include natural embankment microfacies. The subphase of the river includes microfacies such as floodplains and floodplains.