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CRS-stack-based residual static correctionNormal access

Authors: I. Koglin, J. Mann and Z. Heilmann
Journal name: Geophysical Prospecting
Issue: Vol 54, No 6, November 2006 pp. 697 - 707
DOI: 10.1111/j.1365-2478.2005.00562.x
Organisations: Wiley
Special topic: Section I – Madrid Workshop on Near-Surface 2005
Language: English
Info: Article, PDF ( 885.38Kb )

Summary:
In the case of onshore data sets, the acquired reflection events can be strongly impaired due to rough top-surface topography and inhomogeneities in the uppermost low-velocity layer, the so-called weathering layer. Without accounting for these influences, the poor data quality will make data processing very difficult.

Usually, the correction for the top-surface topography is not perfect. The residuals from this correction and the influence of the weathering layers lead to small distortions along the reflection events. We integrated a residual static correction method into our data-driven common-reflection-surface-stack-based imaging workflow to further eliminate such distortions. The moveout-corrected traces and the stacked pilot trace are cross-correlated to determine a final estimate of the surface-consistent residual statics in an iterative manner.

As the handling of top-surface topography within the common-reflection-surface stack is discussed in a separate paper in this special issue, the corresponding residual static correction will be explained in more detail. For this purpose, the results obtained with a data set from the Arabian Peninsula will be presented.


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