【摘要】 针对岩石的孔隙喉道尺寸微小,流体在孔喉内的流动规律极其复杂,在现有微尺度研究基础上,建立聚合物驱动态网络模型.该模型不同于准静态网络模型,不仅考虑黏滞力与毛管力的作用,同时还考虑岩石骨架与流体之间界面作用对流动规律的影响.模型通过模拟固液界面作用、孔喉特征参数对聚合物驱后剩余油分布的影响.结果表明:考虑固液界面作用时,含剩余油的孔隙所占比例越大,剩余油饱和度越大;孔喉比越大,含剩余油的孔隙所占比例越大,剩余油饱和度越大;配位数越大,含剩余油的孔隙所占比例越小,剩余油饱和度越小.更多还原

【Abstract】 Due to micro scale pore structure,flow in porous media is quite complex.Based on studies of micro flow,dynamic network model of polymer flooding is established,taking into account the capillary pressure,viscous force and solid-fluid interface effect.Numerical results show the solid-fluid interface effect of pore structure on remaining oil distribution.It is shown that considering solid-fluid interface effect,remaining oil saturation increases.Pore-throat ratio increasing or coordination number decreasing will lead to larger remaining oil saturation.更多还原