Interference and the art of static correction: raypath interferometry at Hussar

David C. Henley

ABSTRACT

The technique known as raypath interferometry has been developed specifically to provide static corrections for seismic data from areas where surface-consistency is not valid, and where near-surface conditions complicate reflection event arrivals. The new technique is also compatible with surface-consistent data, however, and can increase effective redundancy for static corrections in general. Furthermore, the interferometry process itself, which involves inverse filtering, can apparently broaden the band of the resulting stack image. We demonstrate raypath interferometry on a subset of data from the 2011 Hussar Low-frequency experiment, providing static corrections for both PP and PS data. The result for PP data appears to be at least as good as conventional statics, while that for PS data is at least comparable to the conventional results over key horizons.

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