Methods and applications of 3-D wave equation common-azimuth prestack migration |
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| Authors: | Cheng Jiubing Wang Huazhong Geng Jianhua and Ma Zaitian |
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| Institution: | (1) School of Ocean and Earth Science, Tongji University, Shanghai, 200092, China |
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| Abstract: | To tackle the difficulties of a 3-D full volume prestack migration based on the double-square-root (DSR) one-way wave equation
in practical applications, the common-azimuth migration approach is first discussed using dual-domain wave propagators under
the theoretical frame of crossline common-offset migration. Through coordinate transforming, a common-azimuth prestack tau
migration technology that recursively continues the source and receiver wavefields and picks up the migrated results in the
two-way vertical traveltime (tau) direction is developed. The migrations of synthetic data sets of SEG/EAGE salt model prove
that our common-azimuth migration approaches are effective in both depth and tau domains. Two real data examples show the
advantages of wave-theory based prestack migration methods in accuracy and imaging resolution over the conventional Kirchhoff
integral methods.
Translated from Oil Geophysical Prospecting, 2006, 41(6): 629–634 译自: 石油地球物理勘探] |
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| Keywords: | wave equation double-square-root common-azimuth prestack migration buried hill complex fault |
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