摘要
用聚四氟乙烯塑料惰性反应器在25℃条件下,以20 g/L的固液比,研究了蒙脱石与不同质量分数的NaOH和Na2CO3碱性驱替剂间的作用,反应时间为0～120 h,根据硅、铝标准曲线,对反应后液相中的硅、铝元素质量分数参数分别进行了分光光度法测定,根据反应前后碱液质量分数的变化,计算各条件下的绝对碱耗量,测定NaOH溶液驱替过程中,蒙脱石填砂管渗透率和注入压力变化。实验结果表明:蒙脱石在碱溶液溶蚀,在溶蚀反应前期溶液中硅铝离子明显增加。相同温度下,蒙脱石在NaOH溶液中比Na2CO3溶液中碱耗量高。在碱溶液驱替过程中,渗透率经过几个波动之后逐渐稳定,稳定之后下降幅度小,呈指数关系。
Experimental research was carried out on chemical reaction between montmorillonite and two alkaline flooding agents(sodium carbonate and sodium hydroxide)with different concentrations in Teflon reactor at 25℃ and 45℃,and in 1g/20ml solid liquid ratio.Liquid parameters such as silicon and aluminium ion concentrations in reacted solution sand mineralogy change of montmorillonite were detected and the reaction time ranged from 0h to 120h.The results show that silicon and aluminums increased significantly.Under the same condition,the consumption of alkali in NaOH solution is more than that of in Na2CO3.The studies enrich the knowledge on alkali flooding and were of importance for reducing the formation damage and enhancing oil recovery.
出处
《辽宁工程技术大学学报（自然科学版）》
CAS
北大核心
2009年第S1期73-75,共3页
Journal of Liaoning Technical University (Natural Science)
基金
中石油2006年重点资助项目(06-02c-01-02)
关键词
蒙脱石
渗透率
硅铝离子质量分数
碱耗
montmorillonite
alkaline loss
silicon and aluminium ion concentrations
alkaline/rock reactions
