粘土矿物碱耗协同效应研究

选择蒙脱石,高岭石,伊利石等三种在储层中最党风的储层粘土矿物,两两分别按２Ｌ：０,１：１,０：２质量配比组成复配物系列;在３０℃、５０℃温度下按１：５,１：８,１：１０（ｇ／ｍｌ）固／液比分别与１．６％的Ｎａ２ＣＯ３深液反应８ｈ,３６０ｈ;监测反应前后碱液浓度的变化;计算了各条件下各自的绝对碱耗量。结果表明三种粘土矿物中蒙脱石耗碱最大,高蛉石的耗碱量与伊利石的接近;随着固／液比减小和温度升高,矿物

Investigation on alkali consumption co-effect between clay minerals

Three reservoir clay minerals such as montmorillonite, kaolinite and illite were selected. Alkali consumption was investigated to define co-effect between these minerals and their corresponding mixtures under three amount ratios, solid/liquid ratios, and at different temperature conditions. Results show the following alkali consumption sequence for those mono-clay minerals montmorillonite(S)gt;kaolinite(K), illite(I). The alkali consumption increases with reaction term and temperature. The decrease of solid/liquid ratio leads to a larger alkali consumption meanwhile the alkali consumption for samples containing montmorillonite(SK,SI) increases linearly with montmorillonite amount, which is not true for kaolinite and illite.