MODELLING THE MULTIPHASE FLOW OF AN OIL-GAS-CONDESATE SYSTEM IN POROUS MEDIA

Abstract

The “Black oil” model is extended to describe the four-phase flow of the oil-gas–condensate systems in porous media, by considering the solubilities of gas in the condensate, water, and oil phases and condensate evaporation into the gas phase. The three-dimensional transient-state model equations are reduced to one-dimensional transient-state forms by the partial integration method. The finite-difference method is used for solution of this model. The calculations of the hydrodynamical parameters of an oil–gas–condensate reservoir element are carried out for several cases, involving a water table in its natural state of the development, water flooding under water–oil contact, combined state of water flooding under water–oil contact and gas pumping into gas zone of the reservoir. This study provides a comparison of the effect of the different exploitation methods of the reservoir fluids production. The present simulation studies indicate that the combined flooding method yields faster recovery.