MULTI-SCALE FINITE VOLUME METHOD FOR RESERVOIR SIMULATION

摘要

A multi-scale finite volume method for simulating a fine-scale geologicalmodel of subsurface reservoir is disclosed.The method includes providing a fine-scale geological model of a subsurfacereservoir associated with a fine-scale grid, acoarse-scale grid, and a dual coarse-scale grid. A coarse-scale operator isconstructed based on internal cells, edge cells, and nodecells on the fine-scale grid that are defined by the dual coarse-scale grid.Pressure in the dual coarse-scale cells is computed usingthe coarse-scale operator. Pressure in the primary coarse-scale cells iscomputed using the computed pressure in the dual coarse--scalecells. A display is produced using the computed pressure in the primary coarse-scale cells. An iterative scheme can be appliedsuch that the computed pressure in the primary coarse-scale cells converges tothe fine-scale pressure solution and mass balanceis maintained on the coarse-scale.