摘要
以岩心和测井资料为基础 ,对夏 5 2断块沙三上段进行沉积微相研究。认为研究区为三角洲沉积体系下的三角洲前缘亚相、三角洲平原亚相。三角洲平原亚相发育分流河道、分流河道间湾、决口扇和决口水道 4种微相 ;三角洲前缘亚相发育河口砂坝、前缘席状砂和水下水道 3种微相。分析揭示了沉积微相展布特征及演化规律 ,指出了勘探开发的有利相带。
Based on the rock core and logging data, a study on the sediment microfacies at Upper Shasan Segment of Xia 52 Fault was carried out, the result of which showed that the study area belonged to the delta frontal subfacies and plain subfacies under the delta sediment system. The delta subfacies developed 4 microfacies: the distributary watercourse, the gulf of the distributary watercourse, the burst fan and the burst watercourse. The delta frontal subfacies developed 3 mirofacies: the river mouth sand dam, the frontal matting-like sand and the underwater channel. The distribution characteristics of sediment microfacies and the evolving laws were analyzed, and so was the favorable facies for prospecting pointed out in this article.
