多孔介质不溶混流体毛细压力与饱和度关系实验研究  

Experimental study of capillary pressure-saturation relationships for immiscible liquids in porous media

作　　者：郑冰[1] 陈家军[1] 尉斌[1] 支银芳[1] 

机构地区：[1]北京师范大学环境学院环境模拟与污染控制重点联合实验室,北京100875

出　　处：《水动力学研究与进展（A辑）》2005年第5期665-672,共8页Chinese Journal of Hydrodynamics

基　　金：国家自然科学基金资助项目(40272107)

摘　　要：采用根据张力计原理设计的简易装置实验测定多孔介质湿润相被单调驱替过程中湿润相饱和度与毛细压力的关系曲线,研究不同两相系统(水-气、水-油、油-气)中该关系的特点和联系。实验结果采用Van公式进行拟合,结果表明实测曲线和拟合曲线吻合很好。为了寻找预测任意两相系统湿润相饱和度与毛细压力关系的简单途径,在Parker等提出的折算理论基础上,采用两种方法处理实验数据、拟合参数,将折算系数应用于实测数据,结果表明通过引入折算系数,一组两相系统中湿润相有效饱和度与折算毛细压力的关系可用于其它两相。In the monotonous displacement experiments of two-phase system （ air-water, oil-water and air-oil）, functional relationships between saturation of wetting phase and capillary head, as well as the connection of these functional relationships among various two-phase systems were measured and studied. The experimental apparatus was designed according to tension plate method and proved to be successful to this end. Van Genuchten retention function was used to describe the saturation-capillary pressure measured, and the results showed excellent agreement between experimental curves and prediction curves. To search a simple and feasible approach for predicting saturation-capillary pressure relations in all two-phase systems, on the basis of S-P scaling theory proposed by Parker et al. , the scaling coefficients was applied to the experimental data and two methods were used to calculate scaling coefficients and parameters. The scaling results indicate that, by scaling coefficients the description of two-phase effective saturation-scaled capillary head relations for arbitrary fluid pairs could be approximately simplified by the same curve.

关 键 词：不溶混流体 两相 毛细压力 饱和度 水 油 气 

分 类 号：O359.2[理学—流体力学]