Modeling of subsidence and stress-dependent hydraulic conductivity for intact and fractured porous media

1994 ◽  
Vol 27 (4) ◽  
pp. 209-234 ◽  
Author(s):  
M. Bai ◽  
D. Elsworth
Keyword(s):  
Porous Media ◽  
Hydraulic Conductivity ◽  
Fractured Porous Media ◽  
Stress Dependent

scholarly journals Modelling stress-dependent single and multi-phase flows in fractured porous media based on an immersed-body method with mesh adaptivity

2018 ◽  
Vol 103 ◽  
pp. 229-241 ◽  
Author(s):  
A. Obeysekara ◽  
Q. Lei ◽  
P. Salinas ◽  
D. Pavlidis ◽  
J. Xiang ◽  
...  
Keyword(s):  
Porous Media ◽  
Fractured Porous Media ◽  
Mesh Adaptivity ◽  
Stress Dependent ◽  
Multi Phase ◽  
Body Method

scholarly journals A Novel Numerical Model for Fluid Flow in 3D Fractured Porous Media Based on an Equivalent Matrix-Fracture Network

Geofluids ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Chi Yao ◽  
Chen He ◽  
Jianhua Yang ◽  
Qinghui Jiang ◽  
Jinsong Huang ◽  
...  
Keyword(s):  
Porous Media ◽  
Fluid Flow ◽  
Hydraulic Conductivity ◽  
Fractured Rock ◽  
Fracture Network ◽  
Numerical Approach ◽  
Porous Matrix ◽  
Fractured Porous Media ◽  
Hydraulic Aperture ◽  
Matrix Fracture

An original 3D numerical approach for fluid flow in fractured porous media is proposed. The whole research domain is discretized by the Delaunay tetrahedron based on the concept of node saturation. Tetrahedral blocks are impermeable, and fluid only flows through the interconnected interfaces between blocks. Fractures and the porous matrix are replaced by the triangular interface network, which is the so-called equivalent matrix-fracture network (EMFN). In this way, the three-dimensional seepage problem becomes a two-dimensional problem. The finite element method is used to solve the steady-state flow problem. The big finding is that the ratio of the macroconductivity of the whole interface network to the local conductivity of an interface is linearly related to the cubic root of the number of nodes used for mesh generation. A formula is presented to describe this relationship. With this formula, we can make sure that the EMFN produces the same macroscopic hydraulic conductivity as the intact rock. The approach is applied in a series of numerical tests to demonstrate its efficiency. Effects of the hydraulic aperture of fracture and connectivity of the fracture network on the effective hydraulic conductivity of fractured rock masses are systematically investigated.

Flow in unsaturated fractured porous media: Hydraulic conductivity of rough surfaces

2000 ◽  
Vol 36 (5) ◽  
pp. 1165-1177 ◽  
Author(s):  
Dani Or ◽  
Markus Tuller
Keyword(s):  
Porous Media ◽  
Hydraulic Conductivity ◽  
Rough Surfaces ◽  
Fractured Porous Media

scholarly journals Study on Stress-Dependent Permeability of Fracture Networks in Fractured Porous Media

Geofluids ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-19
Author(s):  
Yueli Feng ◽  
Yuetian Liu ◽  
Gang Lei
Keyword(s):  
Porous Media ◽  
Analytical Model ◽  
Effective Stress ◽  
Principal Direction ◽  
Fractured Porous Media ◽  
Fracture Aperture ◽  
Fracture Networks ◽  
Equivalent Permeability ◽  
Principal Value ◽  
Stress Dependent

In order to investigate the stress-sensitive characteristics of fracture networks under reservoir actual stress condition and its influence on the seepage in fractured porous media, we carried out permeability tests on experimental models with fracture networks under constant-volume boundary condition. In addition, a novel analytical stress-dependent permeability model of fracture networks in different directions was derived. Based on the test results and the proposed analytical model, the effects of various parameters (e.g., initial fracture aperture, fluid pressure, rock elastic modulus, effective-stress coefficient, and fracture dip) on deformation characteristics of fracture networks and the corresponding permeability tensor of fracture networks were studied. The research results show that, for a fractured porous media with a single group of fractures, the principal value of permeability is always parallel to the fracture-development direction. With increasing effective stress, the principal value of permeability decreases; however, the principal value direction remains unchanged. Moreover, for the fractured porous media with multiple sets of fractures, the principal direction of equivalent permeability will be inclined to the fractures with larger fracture aperture. Specifically, for the fractured porous media with two sets of intersecting fractures, the principal direction of equivalent permeability is parallel to the angular bisector of these two sets of intersecting fractures. Furthermore, the greater the difference of the fracture aperture change rate under effective stress, the more obvious the deviation of the permeability principal direction. The derived analytical model is of great theoretical and scientific significance to deepen the understanding of the stress-sensitive permeability of fractured reservoirs.

FracKfinder: A MATLAB Toolbox for Computing Three-Dimensional Hydraulic Conductivity Tensors for Fractured Porous Media

Ground Water ◽  
2018 ◽  
Vol 57 (1) ◽  
pp. 75-80 ◽  
Author(s):  
Nathan L. Young ◽  
Jacqueline E. Reber ◽  
William W. Simpkins
Keyword(s):  
Porous Media ◽  
Hydraulic Conductivity ◽  
Three Dimensional ◽  
Fractured Porous Media ◽  
Matlab Toolbox

A generalized matrix-fracture flow transfer model for fractured porous media

2021 ◽  
Author(s):  
Zhechao wang ◽  
Jiafan guo ◽  
Zhejun pan ◽  
Liping qiao ◽  
Jie liu ◽  
...  
Keyword(s):  
Porous Media ◽  
Fractured Porous Media ◽  
Transfer Model ◽  
Fracture Flow ◽  
Matrix Fracture ◽  
Generalized Matrix ◽  
Flow Transfer

Unsaturated Hydraulic Conductivity of Structured Porous Media

2002 ◽  
Vol 1 (1) ◽  
pp. 14
Author(s):  
Markus Tuller ◽  
Dani Or
Keyword(s):  
Porous Media ◽  
Hydraulic Conductivity ◽  
Unsaturated Hydraulic Conductivity
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