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MIGRATION BY EXTRAPOLATION OF TIME‐DEPENDENT BOUNDARY VALUES *
Author(s) -
McMECHAN G. A.
Publication year - 1983
Publication title -
geophysical prospecting
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.735
H-Index - 79
eISSN - 1365-2478
pISSN - 0016-8025
DOI - 10.1111/j.1365-2478.1983.tb01060.x
Subject(s) - extrapolation , offset (computer science) , geology , wave equation , boundary value problem , seismic migration , mathematical analysis , variable (mathematics) , finite difference method , mineralogy , geometry , mathematics , geophysics , computer science , programming language
A bstract Migration of an observed zero‐offset wavefield can be performed as the solution of a boundary value problem in which the data are extrapolated backward in time. This concept is implemented through a finite‐difference solution of the two‐dimensional acoustic wave equation. All depths are imaged simultaneously at time 0 (the imaging condition), and all dips (right up to vertical) are correctly migrated. Numerical examples illustrate this technique in both constant and variable velocity media.