某低渗透砂岩铀矿岩心特性分析
Uranium Mining and Metallurgy(2007)
Abstract
原地浸出中井孔抽注水能力是铀矿床可否地浸的重要因素,针对内蒙古某低渗透、钙胶结严重的砂岩铀矿进行了与地层渗透性能相关的微观性质研究。岩心分析结果表明,砂岩骨架由石英、钾长石和钠长石构成,但钙胶结较严重。黏土含量相对较高,其中以蒙脱石和绿泥石为主。孔隙中死体积相对较多,孔喉平均孔径较小,使渗流能力较差。孔结构和黏土矿物组成使矿层还受到可能的流体损害。
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Key words
sandstone uranium deposit,core analysis,low permeability
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