S地区沙三段储层成岩作用分析

Analysis on Diagenesis of Sha 3 Reservoir in S Area

在漫长的沉积演化过程中,S地区沙三段的砂岩经历了长时间的成岩演变,过程十分曲折和剧烈,遭受的成岩作用类型也比较多。成岩作用对储层的孔隙演化起到主要的控制作用,因此,不同的成岩作用都会影响砂岩的孔隙演化,可以使砂岩的非均质性加剧,造成现今S地区沙三段的砂岩呈现出低孔低渗的特征。主要对S地区沙三段储层的成岩作用进行了分析与研究,对了解该区的有利储层分布,总结油气成藏模式以及后续的勘探开发,具有十分重要的指导意义。

In the long process of sedimentary evolution,the sandstones of the third member of Shahejie Formation in S area have undergone a long period of diagenesis,which is very tortuous and intense,and suffer many types of diagenesis.Diagenesis plays a major role in controlling the pore evolution of reservoirs.Therefore,different diagenesis will affect the pore evolution of sandstones,which can aggravate the heterogeneity of sandstones,resulting in the sandstones of the third member of Shahejie Formation in S area presenting the characteristics of low porosity and low permeability.This paper mainly analyses and studies the diagenesis of the third member of Shahejie Formation in S area,which is of great guiding significance for understanding the distribution of favorable reservoirs in this area,summarizing the hydrocarbon accumulation model and subsequent exploration and development.