摘要
运用铸体薄片、阴极发光和扫描电镜等分析方法,对鄂尔多斯盆地合水地区长8储层砂岩的岩矿特征、自生矿物、孔隙发育特征、成岩作用进行了分析和研究。结果表明,长8储层砂体的主要自生矿物为高岭石、绿泥石、伊利石、方解石、石英和长石等;成岩作用主要有压实作用、胶结作用、交代作用及溶解、溶蚀作用等。压实作用、胶结作用对储层孔隙起破坏性作用,而溶解作用、交代作用使储层孔隙增大,改善储层的孔渗能力。
Diagenetic evolution law of oil and gas reservoir is one of the main research contents in oil and gas exploration.The study of reservoir diagenesis is aimed at those diagenesis cases which cause physical property changing,it discusses the evolution of reservoir pore to predict favorable hydrocarbon distribution.The thin section,cathodoluminescence and scanning electron microscopy are applied to analyze the petrological characteristics,authigenic minerals,pore development,diagenesis of Chang 8 reservoir sandstone in Heshui area of Ordos Basin.The result shows that the main authigenic minerals include kaolinite,chlorite,illite,calcite,quartz and feldspar.Diagenesis types mainly include compaction,cementation,metasomasis,dissolving,dissolution,etc.compaction and cementation damage the reservoir porasity,while dissolution and metasomasis improves porosity and permeability of reservoir.
出处
《长江大学学报（自然科学版）》
CAS
2011年第2期50-52,280,共3页
Journal of Yangtze University(Natural Science Edition)
关键词
鄂尔多斯盆地
长8储层
岩矿特征
自生矿物
成岩作用
Ordos Basin
Chang 8 reservoir
ore characteristics
authigenic mineral
diagenesis
