Open AccessA new method for calculating the exchange flux in discrete fracture model for two-phase flow in fractured porous media
Author(s) -
Lü Li,
Aibin Shi,
Xiaohong Wang
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/384/1/012087
Subject(s) - design for manufacturability , mechanics , porous medium , fracture (geology) , flow (mathematics) , capillary pressure , permeability (electromagnetism) , flux (metallurgy) , two phase flow , matrix (chemical analysis) , relative permeability , materials science , porosity , engineering , chemistry , physics , composite material , mechanical engineering , metallurgy , biochemistry , membrane
The discrete fracture model (DFM) is widely used in order to simulate the flow state of two phase flow in fractured reservoirs. There is a strong capillary pressure contrast between the matrix and the fracture in low-permeability reservoirs with conductive fractures. The physical quantities of the matrix-fracture interface change drastically and the flow pattern near the interface depends on the flow direction which make it very difficult to calculate the matrix-fracture exchange flux. New interface conditions are applied in this paper to get a scheme for calculating the m-f exchange flux. Based on new interface conditions the scheme for calculating the exchange flux is established. This scheme can improve the computational efficiency of the multi-phase flow in DFM since considering the discontinuous of physical quantities near the interface. The numerical test show that the proposed model has better performance than the traditional model.