| 摘要 |
Method for evaluating fluid flows in a heterogeneous medium, by means of a hybrid grid constructed from a CPG type structured grid and from a radial grid. The first stage consists in locally deforming the CPG type grid into a non-uniform Cartesian grid. These local grid cell deformations correspond to the change from a reference frame referred to as "CPG" frame to a reference frame referred to as "Cartesian" frame defined by the deformation. These deformations are then quantified, by a deformation function phi, and applied to the radial grid so as to shift to the "Cartesian" frame. The second stage consists in locally correcting the definition of this deformation function around the radial grid, so that the radial grid, in the "Cartesian" frame, keeps its geometrical characteristics necessary for generation of a transition grid. A hybrid grid is then generated in the "Cartesian" frame from the two grids thus deformed. Finally, this hybrid grid is deformed to return to the "CPG" frame, by means of the inverse of deformation function phi. Applications: study of hydrocarbon reservoirs for example.
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