Recursive prestack depth migration using CFP gathers

Journal article (2006)
Department
Geotechnology (CEG) (TU Delft)
Copyright: © 2006 Society of Exploration Geophysicists
DOI: https://doi.org/doi:10.1190/1.2348517
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Published Date

03-11-2006

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Source:

Geophysics, 71 (6), 2006

Faculty

Civil Engineering and Geosciences

Department

Geotechnology

Abstract

The common-focus-point technology (CFP) describes prestack migration by focusing in two steps: emission and detection. The output of the first focusing step represents a CFP gather. This gather defines a shot record that represents the subsurface response resulting from a focused source wavefield. We propose applying the recursive shot-record, depth-migration algorithm to the CFP gathers of a seismic data volume and refer to this process as CFP-gather migration. In the situation of complex geology and/or low signal-to-noise ratio, CFP-based image gathers are easier to interpret for nonalignment than the conventional image gathers. This makes the CFP-based image gathers better suited for velocity analysis. This important property is illustrated by examples on the Marmousi model.