关键词: 网络模型, 多相流, 毛细管压力, 相对渗透率, 配位数, 数学模型

Abstract: Three-dimensional cubic network model composed of pores and throats was built using computer simulation. The sizes of pore and throat were randomly created according to the normal distribution of pores and throats. The fluid flow process in the model was analyzed, and the mathematical models for solving capillary pressure and relative permeability were set up. The solutions of the models are consonant with the theoretical values. The effects of average connection number and model size on the calculation result showed that increase of average connection number could improve the connectivity of model, but the size of the model had little effect on the calculation. Compared to other idea models, the 3D network model is more veritable for studying oil and water flow features.

Key words: network model, multiphase flow, capillary pressure, relative permeability, connection number, mathematical model