气藏型储气库井注采动态不稳定流分析方法

针对现有不稳定流分析方法的局限性,结合强非均质气藏型储气库注采运行特点,建立了考虑储气库多周期注采历史动态等复杂因素的动态不稳定流分析方法,并绘制了相关理论图版.提出了适合储气库井交变工况的"三点两段"式注采动态不稳定流分析新模式,"三点"指循环注采的3个时间点,即建库注气起始点、注采分析段起始点和结束点,"两段"指历...     

A control volume based finite element method for simulating incompressible two-phase flow in heterogeneous porous media and its application to reservoir engineering

Applying the standard Galerkin finite element method for solving flow problems in porous media encounters some difficulties such as numerical oscillation at the shock front and discontinuity of the velocity field on element faces.Discontinuity of velocity field leads this method not to conserve mass locally.Moreover,the accuracy and stability of a solution is highly affected by a non-conservative method.In this paper,a three dimensional control volume finite element method is developed for twophase fluid flow simulation which overcomes the deficiency of the standard finite element method,and attains high-orders of accuracy at a reasonable computational cost.Moreover,this method is capable of handling heterogeneity in a very rational way.A fully implicit scheme is applied to temporal discretization of the governing equations to achieve an unconditionally stable solution.The accuracy and efficiency of the method are verified by simulating some waterflooding experiments.Some representative examples are presented to illustrate the capability of the method to simulate two-phase fluid flow in heterogeneous porous media.