[email protected] prestack stolt residual migration paul sava* stanford university biondo biondi...
Post on 20-Dec-2015
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Prestack Stolt residual migration
Paul Sava* Stanford University
Biondo Biondi Stanford University
When is the velocity “correct”?
Motivation
• Why residual migration?• image enhancement
• Why prestack?• migration velocity analysis• illumination
• Why Stolt residual migration?• fast, robust
Prestack & post-stack
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Prestack Stolt residual migration
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Fourier-domain global action
depth
Velocity
ratio (
Velocity ratio (no explicit velocity)Prestack
Example 3illumination or velocity?
Summary
• Residual migration– Fourier-domain method– Prestack– No explicit knowledge of velocity
• Analogous to Stolt migration• fast and robust• global action