二元复合驱数值模拟隐格式和应用

研究化学采油中聚合物-表面活性剂二元复合驱数值模拟问题。数学模型包含压力方程、组分浓度方程以及基于水相组分浓度方程形成的水相饱和度方程。提出了一种隐式顺序解法。先隐式求解压力方程,再隐式求解水相饱和度方程, 最后隐式求解组分浓度方程; 通过聚合物驱和二元复合驱模拟,对该隐式算法与传统的隐式压力-显式浓度算法进行了比较。 该隐式算法稳定性好,提高计算效率大约30％。

An implicit scheme for numerical simulation of binary combination flooding and application

The problem of incompressible immiscible two phase displacement with multi-components in porous media, which arises from chemical flooding in oil recovery, is considered. Mathematical model including pressure equation, concentration equation for components and saturation equation for water phase arising from conservation of components in water phase is provied. A sequential implicit difference scheme is established. Some typical simulation experiments are implemented for polymer-surfactant flooding. The proposed implicit method is more stable and efficient than the traditional methods of implicit-pressure-explicit-concentration.