摘要
百色盆地是我国南方小型第三系断陷湖盆,那读组砂岩储层是百色盆地田东凹陷子寅油田主要含油层系,为扇三角洲沉积体:薄片、铸体、探针、电镜、阴极发光、X-衍射研究表明:那读组砂岩储层先后经历了机械压实作用、硅质胶结作用、方解石胶结作用,方解石胶结物溶蚀作用、晚期碳酸盐胶结作用以及重晶石、黄铁矿自生矿物析出等成岩作用;储层粘土矿物以高岭石为主,其次为伊利石,绿泥石和伊蒙混层矿物;各种成岩指标表明那读组砂岩储层进入了晚成岩期B阶段;成岩作用是那读组砂岩储层孔隙演化的主要控制因素,根据统计分析建立了不同成岩演化途径下砂岩的孔隙演化模式和那读组砂岩储层系统内的4个物质平衡模型,次生孔隙是那读组砂岩储层的主要储集空间。
Baise Basin is a small Tertiary Continentians faulted basin of south China. Sandstones of Nadu formation are major hydrocarbon reservoirs in Ziyin oil field, Tiandong depression, Baise Basin, which have undergone the diagenestic elements: compaction, silicate cement, calcite cement, calcite dissolution, late carbonate cement, barite and pyrite seperation. The kaolinite is the main clay mineral in reservoir sandstones with a little illite, chlorite and montmorillonite. The sandstones of Nadu formation have been in B stage of late diagenestic phase with many diagenestic marks. The porous evolution of the sandstones of Nadu formation has been controlled by the diagenesis and the model of porous evolution has been provided with different ways of the sandstones diagenestic evolution. The matter ballance of the sandstones during the diagenesis has been discussed and four models have been built. The second pores are the main reservoir space in the sandstones of Nadu formation.
出处
《大庆石油学院学报》
EI
CAS
北大核心
1995年第3期26-29,共4页
Journal of Daqing Petroleum Institute
基金
中国石油天然气总公司"八.五"攻关项目
关键词
成岩作用
孔隙演化
那读组
储集层
diagenesis, porous evolution, Nadu formation, diagenestic phase, Baise Basin
