基于直流电场提高油田采收率的应用研究

摘要

Mathematical model to describe one-phase seepage mechanism in fractured-vug under electric field was established, and the numerical model of finite element equations was derived, including investigation into the distributions of velocity, pressure and potential in the fractured vug based on COMSOL Multiphysics software and the design of rectifying circuit simulated with Matlab software. The results show that the external DC electric field can increase the fluid velocity in the fractured vug and means great to enhance oil recovery rate of fractured-vuggy reservoirs.%初步建立了外电场作用下缝洞介质内单相渗流的数学模型,推导了有限元方程的数值模型.利用COMS0L Multiphysics软件研究了外电场作用下缝洞介质的渗流机理,给出了外电场作用下缝洞中速度、压力和电势分布,结果表明电场能有效增加缝洞中流体的速度.研究结论为采用直流电场方法提高缝洞介质的采收率提供了一定的理论基础,对于应用外加直流电场方法提高采收率也具有一定意义.为了进一步进行现场试验,设计了整流电路,并利用Matlab软件进行仿真,将得到的直流电应用电感电容进行滤波,得到的仿真波形平稳,达到驱油加电要求.