serval:BIB_DB3795F0E51A
Hybrid analytical and numerical approach for modeling fluid flow in simplified three-dimensional fracture networks
10.1155/2020/3583817
000525005400001
http://dx.doi.org/10.1155/2020/3583817
Roubinet
D.
author
Demirel
S.
author
Voytek
E. B.
author
Wang
X.
author
Irving
J.
author
article
2020-03-26
Geofluids
1468-8115
1468-8123
journal
2020
1-14
<jats:p>Modeling fluid flow in three-dimensional fracture networks is required in a wide variety of applications related to fractured rocks. Numerical approaches developed for this purpose rely on either simplified representations of the physics of the considered problem using mesh-free methods at the fracture scale or complex meshing of the studied systems resulting in considerable computational costs. Here, we derive an alternative approach that does not rely on a full meshing of the fracture network yet maintains an accurate representation of the modeled physical processes. This is done by considering simplified fracture networks in which the fractures are represented as rectangles that are divided into rectangular subfractures such that the fracture intersections are defined on the borders of these subfractures. Two-dimensional analytical solutions for the Darcy-scale flow problem are utilized at the subfracture scale and coupled at the fracture-network scale through discretization nodes located on the subfracture borders. We investigate the impact of parameters related to the location and number of the discretization nodes on the results obtained, and we compare our results with those calculated using reference solutions, which are an analytical solution for simple configurations and a standard finite-element modeling approach for complex configurations. This work represents a first step towards the development of 3D hybrid analytical and numerical approaches where the impact of the surrounding matrix will be eventually considered.</jats:p>
General Earth and Planetary Sciences
eng
60_published
OTHER//PRC-CNRS 5181101856
SNF/Programs/200021_143758
true
University of Lausanne
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