中文摘要：

针对新近系明化镇组细砂热储层岩样,通过室内土柱模拟试验,分别探讨孔隙地下热水中典型离子Cl^-、HCO3^-、Ca^2＋和Na^＋的运移特征,对比研究其一维运移规律。试验结果表明,40℃、60℃条件下Cl^-的纵向弥散系数分别为13.6 cm^2/h、14.9 cm^2/h。HCO3^-水解产生的沉淀物质堵塞土柱,60℃时HCO3^-运移较40℃快。40℃、60℃时Ca^2＋阻滞系数分别为1.14,1.11。Na^＋运移过程中存在离子吸附交换反应,致使其运移迟滞于其它3种离子。

英文摘要：

In this study comparision is carried out for the migration of typical ions between Cl^-,HCO3^-,Ca^2＋and Na^＋in the pore geothermal water in deep-seated aquifers with indoor column tests. The results show that the longitudinal diffusion coefficient of Cl^-is 13. 6 cm^2/ h and 14. 9 cm^2/ h under the temperature of 40 ℃ and 60 ℃,respectively,indicating that the transport capability at a high temperature is stronger than that at low temperature.In the HCO3^-transport process,OH-generated by the hydrolysis with Ca^2＋,Mg2 ＋produces slightly soluble substances,and blocks the soil column. The retardation coefficients of Ca^2＋are 1. 14 and 1. 11 at 40 ℃,60 ℃,respectively,indicating that the blocking ability of the rock samples to Ca^2＋reduces at 60 ℃. The occurrence of Na^＋absorption substitution reaction makes that the effluent of the Na^＋lag behind Cl^-,HCO3^-,Ca^2＋.