The generalized screen propagator (GSP) is a one-way wave equation based wide-angle propagator. The dual domain implementation of GSP migration provides a fast and accurate 3-D wave field extrapolation and produces high-resolution and high-fidelity subsalt images. This migration algorithm was applied to a 3-D GOM deep water dataset and was compared with Kirchhoff PSDM. A wave equation illumination study, including the computation of total and directional illumination intensity, was further carried out to investigate the origins of subsalt imaging shadow zones and amplitude variations for both synthetic model and the real data.
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2005. Society of Exploration Geophysicists