9:30 AM - 9:45 AM
[HSC05-03] TOUGH-GeoFEM : a massively parallel coupled hydro-geomechanical simulator for geologic carbon dioxide storage – current status of the development
Keywords:Hydro-Mechanical coupled analysis, Massively parallel computing, Subsurface carbon dioxide storage
In this study, a massively parallel coupled hydro-mechanical numerical simulator, TOUGH-GeoFEM has been developed. The numerical simulator couples by one-way method two parallel simulators proven on several massively parallel computers: TOUGH2-MP, which is a non-isothermal multiphase and multicomponent fluid flow simulator in the porous media and fractured media, and GeoFEM, which is a mechanical deformation simulator of the solid originally designed for massively parallel supercomputers. The mass balances for fluid components with the Darcy’s flow for multiphase fluid flow in the TOUGH2-MP. Calculated an average pressure is transferred as nodal forces to GeoFEM, and the equilibrium equation for rock-fluids mixture is solved in the GeoFEM.
Firstly, overview of formulation and workflow of TOUGH-GeoFEM was presented. Next, as a numerical example, surface deformation due to CO2 injection was simulated and compared with results from TOUGH-FLAC, which is a well-known hydro-mechanical coupling simulator. It was shown that the result calculated from TOUGH-GeoFEM, a reasonable scalability (i.e. speed-up of computation time against increase in number of processors) was obtained on a parallel computer for a few millions of grids model as an example.