Patent ID: 7453765
Filing Date: 2008-11-18
Classification: G01V

Abstract:
1. A method for analyzing seismic data, the method comprising the steps of: reconstructing first reflectors from the seismic data, yielding an imaging result; reconstructing a first velocity model; designing a first bottom-image generator (BIG) location using the imaging result; defining a bottom-internal-multiple generator (BIMG) location above the first bottom-image generator location; creating a field of virtual events using seismic data above the bottom-internal-multiple generator location and using seismic data below the bottom-internal-multiple generator location and above the first bottom-image generator location; removing at least one internal multiple, using the at least one virtual event, for seismic data below the bottom-internal-multiple generator location; performing a plurality of constant-velocity migration analyses, and selecting a migration result and a corresponding velocity producing a best-focused image of a subsurface.