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Rough-sea deghosting of single-sensor seismic data using the knowledge of the sea surface shape

ENDRIAS G. ASGEDOM,  OKWUDILI C. ORJI,  WALTER SÖLLNER
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PGS Geophysical AS, Oslo, Norway.,
JSE 2017, 26(2), 105–123;
Submitted: 23 September 2016 | Accepted: 7 January 2017 | Published: 1 April 2017
© 2017 by the Authors. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution -Noncommercial 4.0 International License (CC-by the license) ( https://creativecommons.org/licenses/by-nc/4.0/ )
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Abstract

Asgedom, E.G., Orji, O.C. and Séllner, W., 2017. Rough-sea deghosting of single-sensor seismic data using the knowledge of the sea surface shape. Journal of Seismic Exploration, 26: 105-123. Accurate receiver-side deghosting of marine seismic data can be performed for any sea surface condition when both pressure and vertical particle velocity information is available. However, conventional (hydrophone-only) marine acquisition delivers pressure-only data so additional information is required to perform proper deghosting. Here, we propose to use the shape of the sea surface above the receivers as additional information and formulate an inversion-based method to perform the deghosting. Deghosting pressure-only data from rough weather conditions using the inversion-based method is validated with both synthetic and field data examples. The effects of the sea surface roughness, the streamer depth and the noise in the input data are all analysed. Quantitative comparison of the inversion-based method with traditional flat sea surface deghosting shows the superiority of the inversion-based method for any sea surface condition.

Keywords
rough sea surface
scattering
receiver-side deghosting
single-sensor deghosting
inversion
spectral division
marine seismic
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Journal of Seismic Exploration, Electronic ISSN: 0963-0651 Print ISSN: 0963-0651, Published by AccScience Publishing
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