منابع مشابه
Time-migration velocity analysis by velocity continuation
Time-migration velocity analysis can be performed by velocity continuation, an incremental process that transforms migrated seismic sections according to changes in the migration velocity. Velocity continuation enhances residual normal moveout correction by properly taking into account both vertical and lateral movements of events on seismic images. Finite-difference and spectral algorithms pro...
متن کاملVelocity continuation in migration velocity analysis
Velocity continuation can be applied to migration velocity analysis. It enhances residual NMO correction by properly taking into account both vertical and lateral movements of reflectors caused by the change in migration velocity. I exemplify this fact with simple data tests.
متن کاملMigration and velocity analysis by velocity continuation
Residual and cascaded migration can be described as a continuous process of velocity continuation in the post-migration domain. This process moves reflection events on the migrated seismic sections according to changes in the migration velocity. Understanding the laws of velocity continuation is crucially important for a successful application of migration velocity analysis. In this paper, I de...
متن کاملVelocity analysis using weighted semblance
Increasing the resolution of semblance-based velocity spectra, or semblance spectra, can improve the accuracy of normal moveout velocity estimates. The resolution of semblance spectra depends on the sensitivity of semblance to changes in velocity. By weighting terms in the semblance calculation that are more sensitive to changes in velocity, we can increase resolution. Our implementation of wei...
متن کاملLiu and Bleistein Velocity Analysis
Because the reeector is horizontal, the raypaths from the source and the receiver are symmetric. We have cos s = cos r = z
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ژورنال
عنوان ژورنال: Geophysical Prospecting
سال: 2009
ISSN: 0016-8025,1365-2478
DOI: 10.1111/j.1365-2478.2008.00741.x