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This paper presents our work on designing a parallel platform for large-scalereservoir simulations. Detailed components, such as grid and linear solver, anddata structures are introduced, which can serve as a guide to parallelreservoir simulations and other parallel applications. The main objective ofplatform is to support implementation of various parallel reservoir simulatorson distributed-memory parallel systems, where MPI (Message Passing Interface)is employed for communications among computation nodes. It provides structuredgrid due to its simplicity and cell-centered data is applied for each cell. Theplatform has a distributed matrix and vector module and a map module. Thematrix and vector module is the base of our parallel linear systems. The mapconnects grid and linear system modules, which defines various mappings betweengrid and linear systems. Commonly-used Krylov subspace linear solvers areimplemented, including the restarted GMRES method and the BiCGSTAB method. Italso has an interface to a parallel algebraic multigrid solver, BoomerAMG fromHYPRE. Parallel general-purpose preconditioners and special preconditioners forreservoir simulations are also developed. Various data structures are designed,such as grid, cell, data, linear solver and preconditioner, and some keydefault parameters are presented in this paper. The numerical experiments showthat our platform has excellent scalability and it can simulate giant reservoirmodels with hundreds of millions of grid cells using thousands of CPU cores.

Development of A Scalable Platform for Large-scale Reservoir Simulations on Parallel computers