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3D ACOUSTIC PRESTACK REVERSE‐TIME MIGRATION 1
Author(s) -
CHANG WENFONG,
McMECHAN GEORGE A.
Publication year - 1990
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.1365-2478.1990.tb01872.x
Subject(s) - prestack , geology , extrapolation , seismic migration , computation , point source , wave equation , boundary value problem , algorithm , scalar (mathematics) , excitation , mineralogy , seismology , geometry , computer science , mathematical analysis , physics , optics , mathematics , quantum mechanics
A bstract A prestack reverse‐time migration algorithm which operates on common‐source gathers, recorded at the Earth's surface, from 3D structures, is conceived, implemented and tested. Reverse‐time extrapolation of the recorded wavefield (a boundary‐value problem), and computation of the excitation‐time imaging condition for each point in a 3D volume (an initial‐value problem), are both performed using a second‐order finite‐difference solution of the full 3D scalar wave equation. The algorithm is illustrated by processing synthetic data for a point diffractor, an oblique wedge, and the French double dome and fault model.