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EFFICIENT 3‐D MIGRATION IN TWO STEPS *
Author(s) -
GIBSON B.,
LARNER K.,
LEVIN S.
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.tb01039.x
Subject(s) - computation , dimension (graph theory) , homogeneous , regional geology , geology , economic geology , seismic migration , environmental geology , metamorphic petrology , reflection (computer programming) , telmatology , scheme (mathematics) , gemology , synthetic data , geobiology , data processing , algorithm , computational science , seismology , computer science , engineering geology , mathematics , mathematical analysis , tectonics , physics , statistical physics , database , volcanism , pure mathematics , programming language
A bstract The addition of a third dimension to seismic data acquisition offers significant improvement of our reflection images of geologic structures, but potentially at a substantial increase in data processing cost. Here we study an approach to migration of three‐dimensional (3‐D) stacked data that can considerably reduce the burden of computation and data manipulation. Cascading two‐dimensional (2‐D) migrations in orthogonal lateral directions, we obtain an efficient 3‐D scheme that is exact for homogeneous media. As applied to examples of synthetic data from inhomogeneous media, the scheme introduces errors well below those attributable, in practice, to uncertainties in migration velocity. Application of this two‐step approach, using both Kirchhoff‐summation and finite‐difference algorithms, to a 3‐D seismic land survey over an area of known hydrocarbon traps additionally proves the importance of 3‐D migration in stratigraphic imaging.