1887

Abstract

Summary

Surface-wave dispersion characteristics of the subsurface are used to invert for the S-wave velocity structure. On the other hand, the dispersion characteristics can already give some information about anomalies in the subsurface with a minimal amount of processing. We investigate quick scanning to find anomalies in the S-wave velocity structure by analysing the dispersion characteristics along a seismic line. In order to extract lateral information, we use a moving window and transform the traces in each window into the frequency-phase velocity domain. This is first applied to synthetic data with both a positive- and negative-velocity anomaly. With our results, we show how some basic characteristics of the anomaly can be seen and how a larger window removes more lateral information. We apply the methodology to field data, and show that multiple anomalies can be identified.

© EAGE Publications BV
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/content/papers/10.3997/2214-4609.202320095
2023-09-03
2025-12-14

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/content/papers/10.3997/2214-4609.202320095
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Scanning for Near-Surface Velocity Anomalies Using Surface-Wave Dispersion Characteristics
Conference Proceedings 2023, 1 (2023); https://doi.org/10.3997/2214-4609.202320095
/content/papers/10.3997/2214-4609.202320095
/content/papers/10.3997/2214-4609.202320095
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