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Proceedings Paper

Three-dimensional prestack preserved amplitude migration: application to a 3D real dataset
Author(s): Philippe Thierry; Gilles Lambare; Pascal Podvin; Mark Noble
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Paper Abstract

We present algorithms based on ray + Born approximation for 2.5 D and 3D prestack preserved amplitude migration (PPAM) of seismic reflection data. The Green's functions are estimated by dynamic ray tracing in 2D or 3D heterogeneous smooth velocity fields with a wavefront construction method. The algorithms were implemented on a Sparc 20 workstation and special attention was paid to CPU efficiency and low RAM storage. We give some basic idea for optimization and present some applications on synthetic and real datasets. For the 2D version about 10 Mbytes RAM and 10 minutes CPU time are needed for the migration of a marine line, using 300 shots with 120 receivers. For the 3D algorithm, about 48 Mbytes RAM and a weak CPU time are needed for migrating a 3D marine survey using 29 lines consisting of ca. 500 shots with 240 receivers (13 Gbytes).

Paper Details

Date Published: 28 October 1996
PDF: 38 pages
Proc. SPIE 2822, Mathematical Methods in Geophysical Imaging IV, (28 October 1996); doi: 10.1117/12.255214
Show Author Affiliations
Philippe Thierry, Ecole des Mines de Paris (France)
Gilles Lambare, Ecole des Mines de Paris (France)
Pascal Podvin, Ecole des Mines de Paris (France)
Mark Noble, Ecole des Mines de Paris (France)

Published in SPIE Proceedings Vol. 2822:
Mathematical Methods in Geophysical Imaging IV
Siamak Hassanzadeh, Editor(s)

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