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Model-Based Decimation of Input Data for P-Migration for the Purpose of Subsalt Velocity Model Building
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 69th EAGE Conference and Exhibition incorporating SPE EUROPEC 2007, Jun 2007, cp-27-00103
- ISBN: 978-90-73781-54-2
Abstract
C020 Model-Based Decimation of Input Data for P- Migration for the Purpose of Subsalt Velocity Model Building B. Wang* (CGGVeritas) F. Gao (CGGVeritas) D. Wheaton (CGGVeritas) & V. Dirks (CGGVeritas) SUMMARY The process of subsalt velocity model building often requires multiple prestack depth migration runs either for salt geometry scan or subsalt sediment velocity scan. Historically and from a practical point of view decimation of the input data using a regular or random pattern of data selection is frequently applied but does not make use of any available illumination criteria. In this paper we present an alternative methodology that offers