NDLI: An efficient hybrid local nonmatching method for multiphase flow simulations in heterogeneous fractured media

Content Provider	Springer Nature Link
Author	Mustapha, Hussein
Copyright Year	2014
Abstract	This paper presents simulation methodology that combines a local nonmatching grid with a discrete fracture model. Designed for 2D and 3D multiphase flow simulations in standard simulators, the method handles matrix–matrix, fracture–fracture, and matrix–fracture connections in the context of an unstructured, local nonmatching grid. The grid is generated at the fracture intersections, enabling accurate modeling of small control volumes between connecting fractures. Grids are obtained simply by redistributing the volume of small control volumes surrounding the small control volumes, making the method computationally efficient. A unified method to calculate the interblock transmissibility is used for both matching and nonmatching mesh. An unstructured finite-volume graph-based reservoir simulator with a two-point flux approximation reads the new grid by making a simple modification to the graph of connections between the control volumes. The method requires no special treatment of fracture–fracture or matrix–fracture transmissibility calculations and has the flexibility to simulate any flow problem efficiently. Several 2D and 3D numerical examples demonstrate the method’s performance and accuracy. Both simple and complex fracture configurations are presented with various levels of geologic and fluid complexity. The numerical results are in good agreement with those of a reference solution obtained on a finely structured grid.
Starting Page	347
Ending Page	360
Page Count	14
File Format	PDF
ISSN	01770667
Journal	Engineering with Computers
Volume Number	31
Issue Number	2
e-ISSN	14355663
Language	English
Publisher	Springer London
Publisher Date	2014-02-25
Publisher Place	London
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Discrete fracture model Hybrid grid Matching grid Nonmatching grid Mortar finite volume Computer-Aided Engineering (CAD, CAE) and Design Math. Applications in Chemistry Systems Theory, Control Calculus of Variations and Optimal Control; Optimization Mechanics ApplicationMathematics/Computational Methods of Engineering
Content Type	Text
Resource Type	Article
Subject	Engineering Computer Science Applications Modeling and Simulation Software

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