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Proceedings Paper

Three-dimensional paraxial migration method without lateral splitting
Author(s): Michel Kern
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Paper Abstract

We introduce a migration algorithm based on paraxial wave equation that does not use any splitting in the lateral variables. The discretization is first derived in the constant coefficient case by higher order finite differences, then generalized to arbitrarily varying velocities via finite elements. We present a detailed plane wave analysis in a homogeneous medium, and give evidence that numerical dispersion and anisotropy can be controlled. Propagation along depth is done with a higher order method based on a conservative Runge Kutta method. At each step in depth we have to solve a large linear system. This is the most time consuming part of the method. The key to obtaining good performance lies in the use of a Conjugate Gradient like iterative solver. We show the performance of the method with a model example.

Paper Details

Date Published: 1 September 1995
PDF: 12 pages
Proc. SPIE 2571, Mathematical Methods in Geophysical Imaging III, (1 September 1995); doi: 10.1117/12.218504
Show Author Affiliations
Michel Kern, INRIA (France)

Published in SPIE Proceedings Vol. 2571:
Mathematical Methods in Geophysical Imaging III
Siamak Hassanzadeh, Editor(s)

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