Greens Function for Migration

G.T. Schuster

ABSTRACT

The Greens functions for the equations of zero-offset and non-zero offset migration are derived under the far-field approximation. By specifying a homogeneous velocity model with irregular layers, these Greens functions can be used to quickly compute the migrated section without having to compute the forward modeled data. This enables the rapid evaluation of how different source-receiver geometries affect the migrated section. Future work should explore the extension of this Green's function to inhomogeneous media, summed prestack migrated sections, discrete arrays, waveform inversion and remigration.

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