抄録
Accurate simulation of multiphase flow processes in complex reservoirs is a key technology that enables the efficient development and intelligent management of oil and gas resources. This paper focuses on the core scientific issues and engineering challenges currently facing multiphase flow simulation. It systematically reviews recent advances in modeling strategies and numerical methods across three typical application scenarios. In complex reservoirs characterized by strong nonlinearity and pronounced multi-scale features, traditional models are increasingly challenged by non-Newtonian fluid behavior, microscale slip effects, and miscible displacement mechanisms. There is an urgent need to develop high-fidelity simulation frameworks capable of coupling multiphysics processes with dynamic phase behavior. In heterogeneous reservoirs, the complexity of spatial structures and the high uncertainty of parameters significantly constrain predictive accuracy. This paper analyzes the roles of high-resolution geological modeling, adaptive grid generation, and thermo-hydro-mechanical coupling mechanisms in enhancing simulation reliability. It discusses the potential of parallel computing and multilevel optimization algorithms for improving computational efficiency. In developing deep and ultra-deep reservoirs, the widespread occurrence of gas-liquid-solid three-phase flows gives rise to complex coupling among solid particle migration, phase transitions, and geomechanical stress fields. Accordingly, this paper proposes a three-phase coupling simulation strategy tailored for extreme conditions, along with its practical implementation approaches.
