硅酸盐通报2012，Vol.31Issue(5)：1101-1105,5.
热力采油条件下粉煤灰改善铝酸盐水泥石耐高温性能及作用机理研究
Study on Aluminates Cement with Fly Ash for Heavy Crude Oil Thermal Recovery in Well Cementation
摘要
Abstract
Silicate cement after high temperature stability turns out badly, which is the key reason to induce the damage of the casing and invalidation of the zonal isolation. Although aluminate cement enjoys better performance in high-temperature resistance compared with the ordinary silicate cement, it has the disadvantage of strong temperature sensitivity and weak intensity after high temperature curing. The experiment is through adding fly ash into the aluminate cement and adopting high energy ball milling to re-prepare cement material, by means of XRD and SEM, high-temperature resistance and the mechanism of the fly ash to improve aluminate cement was analyzed. The result shows that the fly ash added by way of ball milling not only contributes to cement stone low-temperature strength development, it improves the long-term high temperature property of the aluminate cement significantly. That the fly ash, added by ball milling, whose component SiO2 reacted with C3AH6, hydration product of aluminate cement, and generate C3ASH4 and other stable phase. The stable phase makes crystal structure of cement stone be tight arrangement and maintain stability at high temperature and thus keep good mechanical properties. Then it is in favour of casing protection, improves zonal isolation and extends the productive life of heavy oil thermal recovery wells.关键词
稠油热采井/耐高温特性/硅酸盐水泥/粉煤灰Key words
heavy oil thermal production well/high temperature resistant properties/aluminates cement/fly ash分类
建筑与水利引用本文复制引用
李早元,张松,张弛,关素敏,程小伟,郭小阳..热力采油条件下粉煤灰改善铝酸盐水泥石耐高温性能及作用机理研究[J].硅酸盐通报,2012,31(5):1101-1105,5.基金项目
中央财政特色重点学科建设项目资助青年教师科学基金项目 （）
