ASP驱油过程中蒙脱石的碱溶规律研究

RESEARCH ON THE INTERACTIONS OF MONTMORILLONITE WITH ALKALINE SOLUTION

研究了蒙脱石与碱剂 (Na2 CO3、NaOH)间的作用 ,考察了浓度、聚合物和NaCl对蒙脱石与碱剂相互作用的影响。蒙脱石在强碱和弱碱溶液中都发生了溶蚀作用。在氢氧化钠溶液中还生成了新硅铝酸盐沉淀。蒙脱石在强碱溶液中溶蚀更剧烈 ,并随强碱溶液浓度增大溶蚀加剧。聚合物加入到碱剂中对蒙脱石的溶蚀影响不大 ,加入NaCl于碱剂中蒙脱石的溶蚀略有增大。蒙脱石在Na2 CO3溶液中有明显膨胀。

This paper presents the results of a laboratory study of the interactions between montmorillonite and alkaline flooding agents under different concentrations.The results indicated that montmorillonite subjected to corrosion in alkaline solutions and produced SiO 2- 3 and AlO - 2 ions in the liquid phase.In NaOH solution,the dissolved SiO 2- 3 and AlO - 2 began to form new mineral species after a long time.The corrosion of montmorillonite increased with increasing concentration of alkaline and was nearly no change after polymer added to and was stronger in NaOH solution than that in Na 2CO 3 solution.