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Water-layer Demultiple Using Separated Wavefields From Variable-depth Streamer Data
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 76th EAGE Conference and Exhibition 2014, Jun 2014, Volume 2014, p.1 - 5
Abstract
Summary
We present an approach for water-layer multiple attenuation using up-going and down-going wavefields available from pre-migration deghosting of variable-depth streamer data. After extrapolation of the separated wavefields to the seabed, the down-going wavefield is used as a multiple model which is adaptively subtracted from the up-going wavefield. The water-layer related multiples removed by this procedure are forward propagated to the variable-depth streamer datum where they are finally subtracted from the deghosted data. We illustrate the concept using a synthetic example and shows results from a variable-depth streamer dataset acquired in the North Sea.
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