本文通过对义东303井沙四上碳酸盐岩岩屑薄片鉴定,结合测井、地震资料的综合研究分析,认为沙四上碳酸盐岩为一套藻礁丘灰岩沉积,属于灰礁亚相。通过对已钻井沙四上亚段地质资料、测井资料分析,结合地震技术,利用多井剖面对比,参考前人总结邵家洼陷沙四段碳酸盐岩亚相发育模式及河口-车西地区沙四段灰岩古地貌情况,得出井区沙四上沉积相的分布规律以及区域碳酸盐岩储层的横向分布规律。 Based on the comprehensive analysis of logging data and seismic data, it is concluded that the Upper Saxian Carbonate is a set of algal reef limestone sediments and belongs to the gray Reef sub-phase. Based on the analysis of the geological data and well logging data of the upper member Sha 4, and the seismic technology and the comparison of multi-well sections, reference is made to the previous conclusions about the carbonate subfacies development model and the estuarine-to- The paleogeomorphology of the limestone in the fourth member of Shahejie Formation in western region shows the distribution of sedimentary facies and the horizontal distribution of carbonate reservoirs in the area.