宜昌莲沱上震旦统灯影组沉积相与储层特征分析

The analysis of the depositional facies and reservoir characteristics of the Dengying Formation, Upper-Sinian in the Liantuo of Yichang

沉积环境不仅影响着岩石的组分和结构,也影响其物性与含油性。本文通过对宜昌莲沱上震旦统灯影组的野外剖面观察描述,研究了地层分布及沉积发育特征,对该地区沉积相、化验资料和其碳酸盐台地沉积体系特征进行了综合分析,并进一步分析了沉积相平面展布及演化,将研究区沉积相划分为2种亚相(开阔台地和局限台地)和3种微相(浅滩、滩海和潮坪)的沉积类型。以此为基础,讨论了储层发育特征、有利储层类型、成岩相的平面展布,找出了储层发育的控制因素及分布规律,预测了储层发育的有利地带。

Sedimentary environment not only affects the composition and structure of the rock, but also affect their properties of nature and oil. In this paper, according to the field sections of Dengying of Upper Sinian in Liantuo of Yichang, the stratigraphic distribution and sedimentary development characteristics are researched, the sedimentary facies, assay data and the carbonate plateau sedimentary system are comprehensively researched, and the sedimentary phase plane distribution and evolution are analyzed further. The sedimentary facies in the area are divided into two kinds of sedimentary sub-phase and three kinds of sedimentary microfacies. Based on these, the characteristics of reservoir development, favorable reservoir types and diagenetic phase plane spread are discussed, the controlling factors for the reservoir development and their distributions are found out, and the favorable reservoir development area are predicted.