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通过对研究区内单井相和测井相分析,利用研究区长7油层组的单井相图、电测曲线来研究长7油层组的沉积相。结果显示其为三角洲前缘亚相沉积,其沉积相可进一步划分为:水下分流河道、河口坝、分流间湾和席状砂等四种类型。油气的聚集受沉积微相的控制影响,研究区长7油层组油气聚集的有利场所是水下分流河道和河口坝。
Based on the analysis of single well and logging facies in the study area, the sedimentary facies of Chang 7 reservoir was studied by single well phase diagram and electrical measuring curve of Chang 7 reservoir in the study area. The results show that it is a delta front subfacies sedimentary facies, the sedimentary facies can be further divided into four types: underwater distributary channel, estuarine dam, shunt bay and sheet sand. The accumulation of oil and gas is affected by the control of sedimentary microfacies. The favorable sites for the accumulation of oil and gas in the Chang 7 reservoir are the underwater distributary channel and estuary dam.