摘要
实验研究了外加直流电场作用下水驱油藏多孔介质中的流体渗流速度、阻力系数、储层渗透率及原油采收率的变化特性。结果表明,多孔介质中流体的渗流速度、有效绝对渗透率系数、原油采收率等均随正向电场强度的增大而明显增大,阻力系数变小,电动力为流体渗流主要驱动力;在反向电场作用时特性呈相反趋势。
The variation of seepage velocity, resistance coefficient, reservoir permeability and oil recovery in porous media of water-drive reservoir in direct current (DC) electric field are studied in detail. In the positive electric field, the seepage velocity of single-phase fluid, the effective absolute permeability coefficient Rk of the low permeability core and oil recovery remarkably increase with the increase of electric field strength. And the electro-kinetic became the main fluid seepage drive power because the resistance coefficient Fr+ is far less than 1 and negative even in low velocity. However, contrary variations of seepage flow characteristics in porous media are showed in opposite electric field. Thus, the experimental results show that the fluid flowing behavior in the porous media is greatly influenced by the polarity and strength of the electric field.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2005年第5期44-46,共3页
High Voltage Engineering
关键词
直流电场
水驱油藏
多孔介质
渗流特性
Electric fields
Petroleum reservoir engineering
Porous materials
Seepage
