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A DOMAIN DECOMPOSITION APPROACH FOR LARGE-SCALE SIMULATIONS OF FLOW PROCESSES IN HYDRATE-BEARING GEOLOGIC MEDIA

University of British Columbia. Department of Chemical and Biological Engineering; International Conference on Gas Hydrates (6th : 2008 : Vancouver, B.C.)

Simulation of the system behavior of hydrate-bearing geologic media involves solving fully coupled mass- and heat-balance equations. In this study, we develop a domain decomposition approach for large-scale gas hydrate simulations with coarse-granularity parallel computation. This approach partitions a simulation domain into small subdomains. The full model domain, consisting of discrete subdomains, is still simulated simultaneously by using multiple processes/processors. Each processor is dedicated to following tasks of the partitioned subdomain: updating thermophysical properties, assembling mass- and energy-balance equations, solving linear equation systems, and performing various other local computations. The linearized equation systems are solved in parallel with a parallel linear solver, using an efficient interprocess communication scheme. This new domain decomposition approach has been implemented into the TOUGH+HYDRATE code and has demonstrated excellent speedup and good scalability. In this paper, we will demonstrate applications for the new approach in simulating field-scale models for gas production from gas-hydrate deposits.

Gas hydrate; Reservoir simulation; Domain decomposition; Parallel computing

Text

eng

Vancouver : University of British Columbia Library

10.14288/1.0041030

Non UBC

Unreviewed

http://creativecommons.org/licenses/by-nc-nd/4.0/