The dynamics of statics

Journal article (2007)
Department
Geotechnology (CEG) (TU Delft)
Copyright: © 2007 Society of Exploration Geophysicists
DOI: https://doi.org/doi:10.1190/1.2723200
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Published Date

30-04-2007

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Source:

The Leading Edge, 26 (4), 2007

Faculty

Civil Engineering and Geosciences

Department

Geotechnology

Abstract

The statics problem, whether short wavelength, long wavelength, residual, or trim, has always been one of the more time-consuming and problematic steps in seismic data processing. We routinely struggle with issues such as poor signal-to-noise (S/N) ratio, cycle skipping, truncated refractors, wavelets with ambiguous first arrival times, etc. Elevation variations create their own problems and impact the choice of datum—floating, phantom or recourse to a zero-velocity layer. Even if we can overcome some of these problems, we still have a “catch 22” situation in which accurate velocity estimation requires good statics, while good statics estimation requires accurate velocities. To characterize these ambiguities, we have come up the oxymoron “time-varying statics.”

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