长官庙油区延9储层沉积体系研究

长官庙油区延9储层是鄂尔多斯盆地陕北吴起地区的一个主要含油层系之一，为了优选下一步勘探开发的有利目标区，有必要对延9储层的沉积体系及砂体展布特征做细致的研究。本文通过翻查大量的文献，整理相关的资料，并根据研究区内现已有的钻井、测井、岩心、化验分析等资料为基础，对长官庙地区延9储层进行了沉积特征、沉积相类型分析研究，认为研究区延9储层为三角洲平原亚相，主要为分流河道与分流间洼两种沉积微相类型。

Study on Pore Throat Classification and Distribution Characteristics of Chang 6 Reservoir in Southern Part of Erdos Basin

The southen area of Erdos basin locates in the south of North Shaanxi slope, the exploration area is about 8 000 km2. Because of the limited resource and the shortage of backup recoverable reserves, it is very important to find new backup exploration areas. Profound understanding and evaluation of Mesozoic petroleum geological conditions and exploration prospect in Fuhuang exploration area are imperative. Yanchang 6 reservoir is the main production formation. In order to study on Yanchang 6 reservoir, its physical properties and lithology were studied, and its pore throat classification and distribution characteristics were also analyzed based on capillary pressure curve shape and parameter characteristics of 58 block samples. The results show that the porosity and larynx way ofYanchang 6 reservoir gradually become small, the property also gradually becomes poor.