✦ LIBER ✦

A review of seismic acoustic imaging by reverse-time migration

✍ Scribed by George A. McMechan

Publisher: John Wiley and Sons
Year: 1989
Tongue: English
Weight: 439 KB
Volume: 1
Category: Article
ISSN: 0899-9457
DOI: 10.1002/ima.1850010104

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✦ Synopsis

Seismic migration is the process by which an acoustic seismic wavefield, containing scatteredldiffracted waves recorded as a function of time, is converted into a focussed image of the corresponding spatial distribution of scatters/diffractors. One method of implementing this is by reverse-time extrapolation of the recorded wavefield using the data as boundary values in a finite-difference solution of the scalar wave equation, plus application of an excitation-time imaging condition. Conceptually, and numerically, this approach is precisely the inverse of the corresponding forward problem of simulation of the response of a given model to an acoustic source.

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