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Ausasia Science and Technology Press, Australia

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A study of relative permeability for transient two-phase flow in a low permeability fractal porous medium

Zhenglan Li, Yonggang Duan, Quantang Fang, Mingqiang Wei

(Published: 2018-08-03)


Corresponding Author and Email:Yonggang Duan, nanchongdyg@163.com


Citation:Li, Z., Duan, Y., Fang, Q., Wei, M. A study of relative permeability for transient two-phase flow in a low permeability fractal porous medium. Advances in Geo-Energy Research, 2018, 2(4): 369-379, doi: 10.26804/ager.2018.04.02.


Article Type:Original article


Abstract:

In this paper, a relative permeability prediction method considering the effects of capillary pressure and threshold pressure gradient in a low permeability fractal porous medium is established and analyzed based on the fractal approximation model that porous medium consist of a bundle of tortuous capillaries. With this method, every parameter has clear physical meaning without empirical constants, and the model's predictions have a good agreement with experimental data. In addition to this, it makes some discussions that how the characteristic parameters (such as tortuosity fractal dimension, pore fractal dimension, ratio of minimum-maximum capillaries diameters and threshold pressure gradient) influence the relative permeability. This study may be conducible to a better understanding of the mechanism for transient two-phase flow in the low permeability fractal porous medium.


Keywords:Fractal theory, transient two-phase flow, relative permeability, threshold pressure gradient.


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