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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。
Yanchang 9 Reservoir in Chang-Miao Oilfield is one of the major oil-bearing formations in the Wuqi area of Northern Ordos Basin. In order to optimize the favorable target area for further exploration and development, it is necessary to study the sedimentary system and sand distribution of Yan 9 reservoir Features to do a detailed study. In this paper, a large number of documents are reviewed and related information is collected. Based on the existing drilling, logging, core and laboratory analysis data in the study area, the sedimentary characteristics of Yan 9 reservoir in Changguanmiao area are studied. According to the facies analysis, the Yan 9 reservoir in the study area is a deltaic facies subfacies, mainly of two types of sedimentary microfacies between distributary channel and distributary depression.