微粒运移对砂岩铀矿层渗透性的伤害研究及评价  

Study and evaluation on fine particle migration damage mechanism of a sandstone deposit

作　　者：王立民[1] 廖文胜[1] 许影[1] 常华[1] 甘楠[1] 

机构地区：[1]核工业北京化工冶金研究院,北京101149

出　　处：《铀矿冶》2015年第4期235-240,244,共7页Uranium Mining and Metallurgy

基　　金：国家自然科学基金(50974057);国家高技术研究发展计划(863计划)(2012AA061802)资助项目

摘　　要：对内蒙古某砂岩铀矿的岩心进行模拟地层条件的微粒运移伤害评价及其机制分析。结果表明,微粒粒径与矿石孔径的匹配性决定了孔隙的堵塞方式和伤害程度。当矿石渗透率增大,且微粒粒径与之匹配时,易引起孔喉堵塞,伤害程度也随之增大。试验中岩心渗透率的伤害程度为86%。并分别分析伤害机制,建立了伤害模型。Calcium carbonate fine particle as the analogue formation particle is studied on migration damage to permeability of core from a uranium deposit in Inner Mongolia. The results indicate that the permeability damage and jam type lie on the matching of particle with aperture. Core permeability damage extent increases as the increment of core permeability, aperture size, and concentration of the particle in fluids. When the particle matches for aperture, the pore throat inclines to be jammed. The highest damage extent of core permeability is 86% by the test results. The damage mechanism is ana- lyzed, hereby damage model is built up.

关 键 词：地浸 伤害评价 机理 砂岩铀矿 微粒运移 

分 类 号：TD868[矿业工程—金属矿开采] P619.14[矿业工程—矿山开采]