Patent ID: 6522973
Filing Date: 2003-02-18
Classification: G01V

Abstract:
A method of obtaining a 2D or 3D representative optimized model of a heterogeneous medium described by physical parameters or quantities, from recorded data corresponding to waves reflected by the medium and picked up by receivers coupled with the medium, in response to waves transmitted therein from a source, and from a priori information including data measured in situ, the method comprising:constructing a 2D or 3D geometric model describing correlation lines or surfaces; constructing a 2D or 3D multi-parameter a priori model described by the physical parameters, from the 2D or 3D geometric model and from data measured in situ for the physical parameters, at points of the medium; modeling any uncertainty of the parameters and correlations thereof in the a priori model by a covariance operator which takes into account a degree of confidence variable at any point for all parameters of the a priori model; and forming an optimum multi-parameter model by inversion of the recorded data which takes into account all the a priori information.