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根据毛管电动—水动力学理论推导了流动电位的计算公式 ,证明在储层岩石中对于 1- 1价电解质溶液亥姆霍兹公式是适用的。同时 ,研究了饱和水溶液及油水两相流的流动电位耦合系数 ΔU/ ΔP与储层特性的关系。结果表明 :1耦合系数的绝对值随溶液浓度的增大而减小 ;2阳离子交换量 QV越大 ,流动电位耦合系数的绝对值也越大 ;3耦合系数随p H值增大而减小 ;4油水两相流的流动电位耦合系数的绝对值随含水饱和度的增加而增大。
According to capillary electrohydrodynamics theory, the calculation formula of flow potential is deduced, and it is proved that the Helmholtz formula of 1- 1 valence electrolyte solution is applicable in reservoir rocks. At the same time, the relationship between flow potential coupling coefficient ΔU / ΔP and reservoir properties of saturated aqueous solution and oil-water two-phase flow was studied. The results show that: 1 the absolute value of the coupling coefficient decreases with the concentration of the solution; 2 the larger the cation exchange capacity QV, the greater the absolute value of the coupling coefficient of the flow potential; 3 the coupling coefficient decreases with increasing p H value ; 4 The absolute value of the coupling coefficient of flow potential in oil-water two-phase flow increases with the increase of water saturation.