掺橡胶乳液和弹性粒子柔性油井水泥石的微结构  

Microstructure of Flexible Oil-Well Cement Stone Mixed with Latex and Elastic Particle

作　　者：刘仍光[1,2] 周仕明[1] 陶谦[1] 阎培渝[3] 丁士东[1] 

机构地区：[1]中国石化石油工程技术研究院,北京100101 [2]中国石油大学(北京),北京102249 [3]清华大学土木工程系,北京100084

出　　处：《硅酸盐学报》2015年第10期1475-1482,共8页Journal of The Chinese Ceramic Society

基　　金：国家自然科学基金面上项目(51374218);中国博士后科学基金资助项目(2015M571228)

摘　　要：研究了80和130℃养护条件下掺入胶乳和弹性粒子对油井水泥石微结构的影响。利用X射线衍射分析了掺胶乳和弹性粒子柔性油井水泥石的水化产物,用扫描电子显微镜观测其微观形貌,用压汞法测试了硬化浆体的孔隙结构。结果表明:胶乳和弹性粒子的掺入没有影响油井水泥水化产物的种类;胶乳改变了硬化浆体的微观形貌,水化产物表面出现绒状物质结构,形成连续的薄膜,Ca(OH)_2晶体呈薄片松散分布;胶乳降低了水泥石的孔隙率,使孔径细化,弹性粒子则增大了水泥石的孔隙率,使孔径粗化。Influence of latex and elastic particle on the microstructure of hardened oil-well cement paste cured at 80 and 130 ℃ was investigated. The hydration products were analyzed by using X-ray diffraction. Its morphology was observed using scanning electron microscopy, and the pore structure was measured with mercury intrusion porosimetry. The results show that the hydration product types of oil-well cement mixed with latex and elastic particle didn＇t change. The morphology is influenced and shows that a layer of fluffy material and continuous film formed on the surface of hydration products due to the mixed latex, the calcium hydroxide crystal, which is hexagonal plate-like and accumulates tightly in hardened neat cement paste, becomes loose and laminar in the flexible oil-well cement paste. The porosity decreases and pore size refines with latex, however, it increases the porosity and makes pore size coarsening with elastic particles.

关 键 词：橡胶乳液 弹性粒子 油井水泥 柔性水泥石 微观结构 

分 类 号：TE256[石油与天然气工程—油气井工程]