纯41块沙四段低渗透储层特征研究  

Characteristics of low permeability reservoir in Es_4, Chun 41 block

作　　者：刘显太[1] 

机构地区：[1]中国科学院广州地球化学研究所

出　　处：《油气地质与采收率》2003年第3期22-24,共3页Petroleum Geology and Recovery Efficiency

摘　　要：采用微孔渗仪、扫描电镜等实验室测定技术,对纯41块储层岩性、物性、孔隙类型、结构特征及成岩作用进行综合研究,认为该储层厚度薄、渗透性差、成熟度低,成岩作用中的压实与胶结作用是导致储层物性变差的主要原因,而后期的溶蚀作用产生了部分次生孔隙,改善了储集性能;微观孔隙结构可划为三种类型:中孔较粗喉道型、小孔较细喉道型和小孔极细喉道型。综合储层的岩性、物性、孔隙结构等特征,可以将纯41块沙四段储层划分为四大类。Lithology, physical property, pore type,structure characteristic and diagenesis of reservoir in Chun 41 block in Es 4 are researched comprehensively with the aid of laboratory test technology including microporoperm instrument, scanning electron microscope etc. It is considered that the reservoir is of small thickness, low permeability and low maturity. Compaction and cementation are the key reasons leading to bad physical property of reservoirs, while the later dissolution is favorable for partial secondary porosity, which improve the reservoir performance. Pore microstructure of reservoirs is divided into three types of middle porecoarse throat, tiny poretiny throat and fine porevery fine throat. According to lithologic features, physical characteristics, pore structure and so on, the Es 4 reservoirs in Chun 41 block can be classified into four types, and mainly belong to type III with low porosity and low permeability.

关 键 词：纯41块 沙四段 低渗透储层 储层特征 储层评价 储集岩 孔隙结构 

分 类 号：P618.130.21[天文地球—矿床学]