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

Advances in Geo-Energy Research

article

Zhenglan Li¹  Yonggang Duan¹  Quantang Fang¹  Mingqiang Wei¹ 

[1] State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University

关键词: Fractal theory;    transient two-phase flow;    relative permeability;    threshold pressure gradient;   

DOI  :  10.26804/ager.2018.04.02

来源: Yandy Scientific Press

【 摘 要 】

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.

【 授权许可】

Unknown