油气水三相微观-连续介质三维流动模拟研究

Three-phase (oil, gas, and water) flow in porous media is of important applications in various engineering areas. Because of the fast development of computational technology, numerical simulation of three-phase three-dimensional (3-D) flow has become an increasingly important tool in various fields of engineering. Due to the complexity of three-phase porous flow, its major pore-level physics has not been incorporated into the numerical modeling. In this project, theories of interfacial phenomena and fluid mechanics, together with the pore-level experiments and numerical analysis, will be applied to study the distributions of oil, gas, and water in pore body-throat networks of porous media, develop flow equations for different fluid distributions. Based on these equations, micro-continuum media (M-C) 3-D pore-throat models will be proposed for 3-D simulation of three-phase porous flow by combining the current 3-D network model and pressure-equilibrium tube-bundle model. The three-phase 3-D M-C model will be validated by analyzing and history-mating laboratory core flood tests. The M-C model will be the first model that combined the pore-level flow phenomena and continuum media modeling into one simulation system and is of broad applications in petroleum, geology, chemical engineering, soil, ground water, environment, and other areas.

多孔介质中油气水三相流动在工程技术中具有重要的应用意义。随着计算机技术的飞速发展，油气水三相三维数值模拟成为不同工程领域中越来越重要的基础工具。由于三相渗流的复杂性，孔隙级三相流动的本质特征还没有真正具体地体现在目前的各种数值模型中。本项目应用多孔介质中的界面现象理论和流体力学基本理论，结合微观岩心实验和数值分析方法，揭示多孔介质孔隙喉道中的油气水三相分布规律，建立不同流体分布状态下的流动方程；在此基础上，综合现有的三维微观网络模型和压力平衡-毛管束模型的优点，构建微观-连续介质三维孔喉模型，发展油气水三相微观-连续介质三维流动模拟方法；进而模拟各种岩心实验结果，形成油气水三相微观-连续介质三维流动模拟的理论和方法。这一模型首次将微观渗流和连续介质模拟结合于一体，在石油、地质、化工、土壤、地下水、环保等领域有广阔的应用前景。

多孔介质中油气水三相流动在工程技术中具有重要的应用意义。随着计算机技术的飞速发展，油气水三相三维数值模拟成为不同工程领域中越来越重要的基础工具。由于三相渗流的复杂性，孔隙级三相流动的本质特征还没有真正具体地体现在目前的各种数值模型中。本项目应用多孔介质中的界面现象理论和流体力学基本理论，结合微观岩心实验和数值分析方法，揭示多孔介质孔隙喉道中的油气水三相分布规律，建立不同流体分布状态下的流动方程；在此基础上，综合现有的三维微观网络模型和压力平衡-毛管束模型的优点，构建微观-连续介质三维孔喉模型，发展油气水三相微观-连续介质三维流动模拟方法；进而模拟各种岩心实验结果，形成油气水三相微观-连续介质三维流动模拟的理论和方法。这一模型首次将微观渗流和连续介质模拟结合于一体，在石油、地质、化工、土壤、地下水、环保等领域有广阔的应用前景。