Method of prestack 3-D migration
Patent 6049759 Issued on April 11, 2000. Estimated Expiration Date: 
January 16, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 16, 2018. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References H000482 Method of migrating seismic data Three dimensional image construction using a grid of two dimensional depth sections Efficient generation of traveltime tables for two dimensional and three dimensional prestack depth migration Seismic depth imaging Wavelet transform method for downward continuation in seismic data migration Method of processing seismic data for migration Method of seismic migration using a massively parallel computer Patent #: 5586026 InventorAssigneeApplicationNo. 007977 filed on 01/16/1998US Classes:702/14SeismologyExaminersPrimary: McElheny, Donald Jr.Attorney, Agent or FirmForeign Patent References
International ClassG06F 019/00AbstractThe present invention relates generally to a method for migrating prestack seismic data that can yield enormous gains in computational efficiency for some classes of seismic velocity models. The method disclosed herein provides an method of rapidly calculating a 2-D or 3-D prestack migration of common offset seismic data volumes for horizontally layered velocity models. Additionally, because of the way that the migration is implemented, it is possible to calculate the migration operator using a very accurate wave transmission model with little increase in overall computer run time, i.e., a "full fidelity" migration. Broadly speaking, the instant invention is founded on the following novel observation: when the underlying velocity model consists of horizontally layered constant-velocity media, the prestack migration of a collection of common offset traces can be written as a convolution of a migration operator with the seismic data. As such, the migration may be sped up enormously by transforming both the migration operator and the seismic data to another domain where the convolution between the two can be calculated very efficiently. The invention disclosed herein will be most fully appreciated by those in the seismic interpretation and seismic processing arts.Other References
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