Title: An Efficient and Parallel Scalable Geomechanics Simulator for Reservoir Simulation
Abstract: Abstract A tetrahedron-grid based parallel geomechanics simulator is developed and presented in this paper. Parallel computing is employed to handle large scale problems by benefiting from its features of distributed memory storage and efficient runtime reduction. This simulator aims to describe rock matrix deformation and its interactions with pore fluid. In the consideration of the feasibility in coupling with a variety of existing reservoir simulators, the modularized geomechanics simulator is designed to be a library. Through interfaces provided by the library, conventional reservoir simulators can get geomechanics effects involved. In this paper, the framework of a parallel geomechanics simulator and the strategy for coupling with a reservoir simulator are presented. Iteratively coupling approach is employed to make geomechanics modeling more independent and flexible. The procedure for solving solid mechanism and calculating coupling parameters is general, which can be applied to more complicated constitutive laws and rock property descriptions. A parallel strategy is proposed to improve the computational efficiency of solving the coupled problem. To verify the utility and efficiency of the geomechanics simulator, simulations coupled with a three-phase black oil model are performed. Expected geomechanical phenomena are illustrated by numerical experiments. In addition, for testing the scalability behaviour, field scale problems with millions reservoir and geomechanics grid blocks are performed. We use an increasing number of processors to run the cases, respectively, and the results indicate an encouraging speedup.
Publication Year: 2015
Publication Date: 2015-10-20
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 12
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