摘要
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 the theory of capillary electrokinetichydrodynamics, a new equation calculating streaming potential is deduced. And it also proves that the Helmholtz equation can be applied to 11 electrolyte.The relationship between reservoir characteristics and the streaming potential coupling coefficient ΔU/ΔP for saturated water solution and oilwater twophase flow is developed. The result shows:①The absolute value of the coupling coeffcient decreases with an increase in concentration;②The higher the cation exchange capacity(Q V) is, the higher the absolute value of coupling coefficient is;③When the pH value increases, the coupling coefficient decreases;④The absolute value of the coupling coefficient for oilwater twophase flow increases with an increase in water saturation.
出处
《测井技术》
CAS
CSCD
北大核心
2000年第2期92-95,共4页
Well Logging Technology
关键词
毛细管
模型
储集层
水动力学
流动电位
电测井
potential capillary rock property theoretical model coupling coefficient
