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Many researchers have revealed that relative permeability depends on the gas-water-rock interactions and ultimately affects the fluid flow regime. However, the way that relative permeability changes with fractal porous media has been unclear so far. In this paper, an improved gas-water relative permeability model was proposed to investigate the mechanism of gas-water displacement in fractal porous media. First, this model took the complexity of pore structure, geometric correction factor, water film, and the real gas effect into account. Then, this model was compared with two classical models and verified against available experimental data. Finally, the effects of structural parameters (pore-size distribution fractal dimension and tortuosity fractal dimension) on gas-water relative permeability were investigated. It was found that the sticking water film on the surface of fracture has a negative effect on water relative permeability. The increase of geometric correction factor and the ignorance of real gas effect cause a decrease of gas relative permeability.

Item Type:	Refereed Article
Keywords:	two-phase flow, gas-water displacement, relative permeability, water film, fractal porous media
Research Division:	Engineering
Research Group:	Civil engineering
Research Field:	Water resources engineering
Objective Division:	Energy
Objective Group:	Environmentally sustainable energy activities
Objective Field:	Environmentally sustainable energy activities not elsewhere classified
UTAS Author:	Wang, X (Professor Xiaolin Wang)
ID Code:	137716
Year Published:	2020 (online first 2019)
Web of Science® Times Cited:	2
Deposited By:	Engineering
Deposited On:	2020-02-28
Last Modified:	2020-04-09
Downloads:	25 View Download Statistics