Deghosting towed streamer data in τ/p domain based on rough sea surface reflectivity
Zhang Xing-Yan1,2, Pan Dong-Ming1, Shi Wen-Ying2, Fang Zhong-Yu2, Dan Zhi-Wei2, and Zhang Li-Xia2
1. China University of Mining and Technology, Xuzhou, 221116, China.
2. NOOC EnerTech-Drilling & Production Co., Development & Prospecting Geophysical Institute, Zhanjiang 524057, China.
Abstract 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-to-noise ratio and resolution of the seismic data.
This study work is supported by the 12th Five Year Plan National Science and Technology Major Projects (No. 20011ZX05023-003-002) and Research projects of CNOOC (No. C/KJF JDCJF 006-2009)
Cite this article:
Zhang Xing-Yan,Pan Dong-Ming,Shi Wen-Ying et al. Deghosting towed streamer data in τ/p domain based on rough sea surface reflectivity[J]. APPLIED GEOPHYSICS, 2015, 12(4): 573-584.
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2015, Vol. 12 
