Parallelization on Unstructured Grids

摘要

We describe experiences with parallelizing real models using an unstructured reservoir simulator on shared memory machines. Using ExxonMobil’s proprietary reservoir simulator, EMpowerTM, which contains an object oriented data hierarchy which describes a fully unstructured mesh, a fully integrated well and surface facility network, and a highly flexible, user specified well management capability, we will show how parallelization is performed at a high level through several variants of data partitioning adapted to the specific algorithmic needs. Property calculations, Jacobian construction, matrix solution methods, and well management may use a variety of different data structures, partitioning, and parallel execution schemes. We discuss mechanisms for addressing problems encountered.