Method for constructing a hybrid mesh on the basis of a mesh of the type of gc

摘要

Method for evaluating the fluid flows in a heterogeneous medium, by means of a hybrid mesh made from a structured grid type gc and a radial grid. The first step consists in locally deforming the mesh of the type gc in a cartesian grid is not uniform. These local deformations of the meshes of which correspond to the passage of a reference "gc " to a so-called" cartesian reference system " is defined by the deformation. These deformations are then quantified by a deformation function f, and applied to the radial grid in order to pass to the reference "cartesian». The second step consists in correcting the definition of this function of deformation around the radial grid, so that the radial grid, in the reference "cartesian ", retains its geometrical characteristics necessary for the generation of a mesh of transition. It then generates, in the reference "cartesian " is corrected, a hybrid mesh on the basis of the two grids are thus deformed. Finally, it deforms the hybrid mesh to return to the reference "gc ", with the aid of the inverse of the deformation function f. application to the study of hydrocarbon deposits, for example.