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Abstract

Summary

We examine the use of a time-frequency transform based normal moveout (NMO) correction and its effects on normal moveout stretch distortion. Our analysis contributes to understanding the nature of normal moveout stretch, particularly in the time-frequency domain. Our normal moveout correction is calculated using either an S-transform or a TT-transform. In the S-transform method we make use of its time shift property. TT-transform allows us to shift local signals using an adaptive block move sum process. In either case normal moveout stretch produces a dimming effect on the traces that increases as the amount of stretch increases. With the S-transform method the dimming mechanism is related to frequency shifts relative to the transform kernel function. When the TT-transform method is used the dimming is observed to be a result of destructive interference between time-shifted localized signals. The result is a self-muted normal moveout corrected gather.

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/content/papers/10.3997/2214-4609.20140867
2014-06-16
2024-04-19

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http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.20140867
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Time-frequency Transform Based NMO Correction with Auto-mute
Conference Proceedings 2014, 1 (2014); https://doi.org/10.3997/2214-4609.20140867
/content/papers/10.3997/2214-4609.20140867
/content/papers/10.3997/2214-4609.20140867
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