摘要
应用薄片鉴定、阴极发光、荧光薄片、扫描电镜、X—衍射和有机质热演化资料，研究了钱参1井上侏罗统低渗透储层特征。认为砂岩储层成熟度低，成岩过程中主要经历了机械压实和化学压实作用，溶解作用较弱。储层处于晚成岩A－B期。孔隙类型包括微孔、粒间孔和溶孔。探讨了砂岩储层的孔隙演化，认为砂岩成熟度低、同生泥微晶碳酸盐的形成和机械压实作用是形成低渗透储层的主要原因。为本区勘探开发提供了地质依据。
Characteristics of low permeability reservoir of upper Jurassic in well Qiancan1 are studied through data of examination of thinAisection, cathodoluminescence, the characteristic of thinusection under fluorcscence, scanning electron microscope, X-ray diffractionand evolution of organlc metter by heat. It is thought that the maturity of sandstone is low,its diagenetic process involves mechanical and chemical compaction, and the dissolution effect is weak. The reservoir is in the stage A-B of late diagenesis period. The pore categoryincludes micropore, intergranular pore and dissolved pore. This paper also approaches thepore evolution of sandstone reservoir, and holds that the main reasons of forming low permeability reservoir are low maturity of sandstone. the formation of syngenetic micritic carbonate,and mechanical cornpaction. This study provides geological basis for exploration and development of this area.
出处
《特种油气藏》
CAS
CSCD
1995年第3期9-14,共6页
Special Oil & Gas Reservoirs
