Deghosting towed streamer data in τ/p domain based on rough sea surface reflectivity

Currently, the deghosting of towed streamer seismic data assumes a flat sea level and a sea-surface reflection coefficient of −1; this decreases the precision of deghosting. A new method that considers the rough sea surface is proposed to suppress ghost reflections. The proposed deghosting method ob...

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Bibliographic Details
Published in:Applied geophysics 2015-12, Vol.12 (4), p.573-584
Main Authors: Zhang, Xing-Yan, Pan, Dong-Ming, Shi, Wen-Ying, Fang, Zhong-Yu, Dan, Zhi-Wei, Zhang, Li-Xia
Format: Article
Language:English
Subjects:
Brackish
Earth and Environmental Science
Earth Sciences
Gaussian
Geophysics/Geodesy
Geotechnical Engineering & Applied Earth Sciences
Ghosts
Marine
Operators
Reflection
Reflection coefficient
Sea level
Seismic surveys
Statistics
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Summary:Currently, the deghosting of towed streamer seismic data assumes a flat sea level and a sea-surface reflection coefficient of −1; this decreases the precision of deghosting. A new method that considers the rough sea surface is proposed to suppress ghost reflections. The proposed deghosting method obtains the rough sea surface reflection coefficient using Gaussian statistics, and calculates the optimized deghosting operator in the τ / p domain. The proposed method is closer to the actual sea conditions, offers an improved deghosting operator, removes the ghost reflections from marine towed seismic data, widens the bandwidth and restores the low-frequency information, and finally improves the signal-tonoise ratio and resolution of the seismic data.
ISSN:1672-7975
1993-0658
DOI:10.1007/s11770-015-0521-1