Water flooding is the most widely used method to enhance oil recovery. Simulating the influence of particle content on fluid flow in water flooding process can provide instructive significance for oilfield development. In this paper, a pore network model was established to simulate the transport process of particles in injected water and fallen particles from the reservoir. It was used to study the influence of particle blockage, deposition and migration on the clogged throats and changes of oil-water relative permeability curves. In the model, four parameters were set, fallen particle diameter, injected particle diameter, fallen particle number and injected particle number. Other parameters were fixed and only a variable was changed to explore the changeable rule of relative permeability curves. It can be generally noted that fallen particle changes have great influence on the relative permeability curves of oil phase and injected particle changes mainly affect the relative permeability curves of water phase. It is of great significance for oilfield development to study the influence of particle transportation on fluid seepage processes.

注水是最广泛使用的提高采油率的方法。模拟注水过程中颗粒含量对流体流动的影响，对油田开发具有指导意义。在本文中，建立了一个孔隙网络模型来模拟注入水中的颗粒和从储层中下落的颗粒的输送过程。它用于研究颗粒阻塞，沉积和迁移对喉咙堵塞的影响以及油水相对渗透率曲线的变化。在该模型中，设置了四个参数，下落粒径，注入粒径，下落粒子数和注入粒子数。固定了其他参数，仅更改了一个变量以探索相对渗透率曲线的变化规律。通常可以注意到，下落的颗粒变化对油相的相对渗透率曲线有很大的影响，而注入的颗粒变化主要影响水相的相对渗透率曲线。研究颗粒运移对渗流过程的影响对油田开发具有重要意义。