Time-shift imaging condition in seismic migration

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چکیده

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Time-shift imaging condition in seismic migration

Seismic imaging based on single-scattering approximation is based on analysis of the match between the source and receiver wavefields at every image location. Wavefields at depth are functions of space and time and are reconstructed from surface data either by integral methods (Kirchhoff migration) or by differential methods (reverse-time or wavefield extrapolation migration). Different methods...

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We derive a new generalized imaging condition based on time shifts between source and receiver wavefields. This imaging condition contrasts with other imaging techniques requiring space shifts between the two wavefields. This imaging condition is applicable to both Kirchhoff and wave-equation migrations. The transformation allows us to generate common-image gathers presented as function of eith...

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Time-shift imaging condition for converted waves

A typical imaging condition for seismic reflection data involves source and receiver wavefield matching, e.g. by cross-correlation, at every image location. This statement is true no matter how the two wavefields are reconstructed, for example by one-way wavefield extrapolation, or two-way reverse-time extrapolation, or Kirchhoff integral methods. This statement is also true when the source and...

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Wave-equation migration velocity analysis with time-shift imaging

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ژورنال

عنوان ژورنال: GEOPHYSICS

سال: 2006

ISSN: 0016-8033,1942-2156

DOI: 10.1190/1.2338824