Patent ID: 6907392

Claim:
A method of generating a hybrid grid applicable to a heterogeneous formation crossed by at least one pipe or at least well of known geometry, in order to form a model representative of fluid flows in the formation in accordance with a defined numerical pattern, structure of the formation being known a priori from available data acquired through in-situ measurements, analyses and/or interpretations of images of the formations, comprising: generating a first structured grid to grid the formation by consideration of discontinuities thereof; generating at least one second structured radial type grid to grid the zones around the at least one well or the at least one pipe, the second grid allowing consideration of constraints linked with flows in the at least one well or the at least one pipe; associating the first and second structured grids; forming at least one unstructured transition grid by applying using a generalized map processing; and generating a hybrid grid by inserting the unstructured transition grid between the first structured grid and each second structured grid.