基于Fluent的稠油多相渗流压力场数值模拟

Numerical simulation of multiphase seepage pressure field of heavy oil based on Fluent

应用SCDM软件建立稠油多相渗流的三维物理模型,用ICEM进行离散化处理,选择描述多相流的Mixture和k-ε模型,用Fluent软件对不同孔隙率、不同边界压力和不同黏滞阻力系数条件下的稠油渗流场压力分布进行数值模拟。数值模拟结果表明,压力边界条件对稠油渗流压力场的分布有重要影响,注入井与生产井之间的压力耦合效应很明显;孔隙率对稠油渗流压力场的影响效果随压力的变化而变化;稠油和蒸汽的黏滞系数对稠油渗流场的分布影响显著;Fluent软件可以处理复杂压力边界条件的稠油渗流问题。

The 3D physical model of multiphase seepage in heavy oil is established by using SCDM and is discretized with ICEM,mixture and k-εmodel were chosen in order to describe the characteristics of multiphase seepage,the pressure distribution of heavy oil seepage field was simulated by using Fluent software under different porosity,boundary pressure and viscous resistance coefficient.The numerical simulation results indicate that pressure boundary condition has an important influence on the distribution of heavy oil seepage pressure,and the pressure coupling effect between injection well and production well is obvious.The effect of porosity on the heavy oil seepage pressure field changes with the variation of pressure.The viscosity coefficients of heavy oil and water vapor have significant effects on the distribution of heavy oil seepage field.Reasonable numerical results show that Fluent can solve heavy oil seepage problem with complex pressure boundary conditions.