Patent ID: 7499837
Filing Date: 2009-03-03
Classification: G01V

Abstract:
1. A method of generating sample data from a computerized model of a mass using acoustic simulations, the method comprising: creating a computerized model of the mass; dividing the computerized model into a plurality of layers, one or more of the layers representing physical features of the mass; characterizing each layer by a propagation wavenumber; solving acoustic wave equations for the layered model using a multi-level generalized minimal residual (GMRES) algorithm, the multi-level GMRES algorithm including an inner GMRES algorithm, employing one of a layered medium preconditioner or a forward-backward two-equation lower block triangular preconditioner, and an outer GMRES algorithm, employing a variable-width three-band subdomain lower block triangiular prereconditioner; simulating sample acoustic data using the solved wave equations; and storing the sample acoustic data in an electronic memory.