Patent ID: 7715985
Filing Date: 2010-05-11
Classification: G01V

Abstract:
1. An apparatus for evaluating an interaction between a wavefield and a body, comprising: (a) means for providing an injection boundary enclosing a subspace of a model having one or more physical and/or geometrical properties representing a body; (b) means for providing an extrapolation surface enclosing a portion of the subspace; (c) means for generating at and/or near the injection boundary waveforms representing an initial interaction between an initial wavefield and the body; (d) means for changing the physical and/or geometrical properties in the portion of the subspace enclosed by the extrapolation surface; (e) means for applying the waveforms to the subspace as a boundary condition, thereby radiating/emitting the waveforms into the subspace; (f) means for propagating the radiated/emitted waveforms throughout the subspace; (g) means for using Green's functions to extrapolate the propagated waveforms recorded/observed along the extrapolation surface to the injection boundary, thereby implementing one or more interactions between the waveforms propagated throughout the subspace and the model; and (h) means for updating the boundary condition.