微硅对水泥石抗腐蚀性能影响的研究  

Research on the Effect of Micro-silica on the Corrosion-resistant Performance of Cement-stone

作　　者：谢兆军[1] 朱泽华[1] 叶中郎[1] 闫薇[1] 程小伟[1] 

机构地区：[1]西南石油大学材料科学与工程学院,四川成都610500

出　　处：《水泥技术》2011年第6期36-39,共4页Cement Technology

基　　金：西南石油大学中青年骨干教师和西南石油大学校级青年科技基金资助项目(编号:2007XJZ032)

摘　　要：石在酸性介质下的耐腐蚀性,本文在分析水泥石在含H2S和CO2条件下的腐蚀机理的基础上,通过实验证明微在油气开采中,地层构造中的H2S/CO2对水泥石产生碳化腐蚀,严重影响固井效果,为改善和提高水泥硅是一种良好的填充料,可提高水泥石的密实度,从而提高其抗压强度。对不同龄期的水泥石进行腐蚀,测试腐蚀后的抗压强度,分析比较纯水泥、微硅水泥的抗腐蚀性能;并利用金相显微镜和X-衍射图谱,观察分析微硅的抗腐蚀原因。In the exploitation of oil and gas, H2S/CO2 in the layer of earth causes carbonized corrosion to cement-stone, seriously affecting the cementing result. To improve the corrosion-resistant properties of cement-stone in the acid medium and basing on the analysis of corrosion mechanism of cement-stone in the presence of H2S and CO2 in this paper, it is experimentally proved that micro-silica is a kind of good fillers which increases the density of cement-stone and therefore enhances its compressive strength. Corrosion was performed on the cement-stone at different ages and the compressive strength was tested after the corrosion. The corrosion-resistant properties of pure cement and micro-silica-added cement were compared. Meanwhile, metallurgical microscope and X-ray diffraction were used to analyze the corrosion-resistant reasons after the addition of micro-silica.

关 键 词：水泥石 微硅 碳化 抗压强度 腐蚀 

分 类 号：TQ172.1[化学工程—水泥工业]