成岩作用对低渗透砂岩储层物性的影响——以坪北油田上三叠统延长组油藏为例  

Influence of Diagenesis on Physical Property of Low-Permeability Sandstone Reservoirs:Taking the Oil Reservoirs of Yanchang Formation(upper Triassic) in Pingbei Oil Field as Examples

作　　者：龙玉梅[1] 毛树华[1] 桑利[1] 陈文峰[1] 

机构地区：[1]中国石化江汉油田分公司勘探开发研究院,湖北潜江433124

出　　处：《东华理工大学学报（自然科学版）》2008年第2期131-135,共5页Journal of East China University of Technology(Natural Science)

摘　　要：通过岩石薄片、X-衍射、扫描电镜、阴极发光、压汞等分析测试手段对储层特征进行详细研究,认为该区储层岩石类型主要为细粒长石砂岩,为低孔特低渗型储层,储集空间以溶蚀粒间孔为主,孔喉以小孔细喉型、细小孔微细喉型为主。压实作用、浊沸石、方解石、绿泥石的胶结作用和浊沸石、长石的溶蚀作用是影响砂岩储集性能的主要因素。The integration of thin section,x-ray diffraction analysis,scanning electron microscopy,cathodoluminescence and mercury injection shows that The reservoir rock is mainly composed of feldspar fine sandstone, which is of low porosity and very low permeability. The main reservoir space is the secondary intergranular pores. The sandstones have small pore and fine throat, or fine pore and tiny throat. The compact, cementation of laumonite, calcite and chlorite, as well as the dissolution of laumontite, feldspar are main factors which affect reservoir properties.

关 键 词：坪北油田 上三叠统 延长组 低渗透储层 成岩作用 储层物性 

分 类 号：P618.13[天文地球—矿床学]