气候变化领域集成服务门户(CCPortal): A discrete fracture model for two-phase flow involving the capillary pressure discontinuities in fractured porous media

CCPortal

DOI	10.1016/j.advwatres.2020.103607
	A discrete fracture model for two-phase flow involving the capillary pressure discontinuities in fractured porous media
	Wang X.-H.; Li L.; Wang M.; Liu Z.-F.; Shi A.-F.
发表日期	2020
ISSN	0309-1708
卷号	142
英文摘要	The discrete fracture model (DFM) has been widely used to describe the flow problems in fractured media. In low-permeability media with conductive fractures embedded in, there is large capillary pressure contrast between fracture and matrix. It may cause very sharp changes of physical quantities near the matrix-fracture interface, which makes it difficult to calculate the matrix-fracture transfer flux accurately in the traditional DFM. In this article, mathematical analysis for the flow characteristics near the matrix-fracture interface is present. Three flow patterns can be distinguished for the two-phase steady flow across the matrix-fracture interface under the assumption of negligible capillary pressure in fracture. The analytical solutions for the three different patterns are derived and then employed to construct an alternative numerical scheme of calculating matrix-fracture transfer flow rate. Numerical examples show that the calculated results of the proposed model are in agreement with the reference solution. It indicates that the proposed model can overcome the difficulty of accurately predicting the matrix-fracture transfer flux in the traditional numerical scheme and then dramatically improve the computational accuracy for the two-phase flow in low-permeability reservoirs with conductive fractures. © 2020 Elsevier Ltd
关键词	Capillarity Capillary tubes Contrast media Fracture Low permeability reservoirs Petroleum reservoir engineering Porous materials Computational accuracy Discrete-fracture models Flow charac-teristics Fractured porous media Mathematical analysis Matrix-fracture transfers Physical quantities Pressure discontinuity Two phase flow capillary pressure discontinuity flow modeling flow pattern fractured medium mathematical analysis numerical model porous medium two phase flow
语种	英语
来源机构	Advances in Water Resources
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/131781
推荐引用方式 GB/T 7714	Wang X.-H.,Li L.,Wang M.,et al. A discrete fracture model for two-phase flow involving the capillary pressure discontinuities in fractured porous media[J]. Advances in Water Resources,2020,142.
APA	Wang X.-H.,Li L.,Wang M.,Liu Z.-F.,&Shi A.-F..(2020).A discrete fracture model for two-phase flow involving the capillary pressure discontinuities in fractured porous media.,142.
MLA	Wang X.-H.,et al."A discrete fracture model for two-phase flow involving the capillary pressure discontinuities in fractured porous media".142(2020).