Patent ID: 7617083

Claim:
A method for simulating fluid flow parameters within a heterogeneous underground medium having a first subdomain, crossed by at least one geological discontinuity having a second subdomain with the domains representing the underground medium, comprising: generating a chimera grid including cells constructing a discretized structural representation of the subdomains, by forming at least a first grid gridding the first subdomain and by forming at least a second grid gridding the second subdomain, the two grids having at least one overlap zone; providing for the first subdomain an interpolation method for estimating fluid flow parameters for each cell of the first grid included in the overlap zone; providing an overlap parameter defining a size of the at least one overlap zone; providing a limit boundary in accordance with the interpolation method and the overlap parameter; identifying cells of the first grid to be interpolated according to the limit boundary, by selecting cells of all points to be interpolated which are located within the limit boundary; identifying interpolation parameters for estimating flow parameters in the cells to be interpolated while imposing continuity of flow parameters between each subdomain; and simulating the flow parameters by solving equations of at least one flow model in the subdomains and by interpolating the flow parameters at a level of the at least one overlap zone using the interpolation parameters.