Model-driving shallow-water-layer multiple attenuation in τ-p domain
Feng Quanxiong1,2, Wang Yanchun1, Li Sanfu3, Dan Zhiwei3, Zhang Xingyan3, Fang Zhongyu3
1. China University of Geosciences (Beijing), Beijing 100086, China;
2. CNOOC International Limited, Beijing 100010, China;
3. Geophysics Department, Ener-Tech Engineering Research Institute, CNOOC, Zhanjiang, Guangdong 524057, China
Abstract:To attenuate shallow -water-layer multiples between the sea surface and the ocean bottom remains a difficulty of marine seismic processing. Conventional methods such as predictive deconvolution and SRME, have significant limitations. We propose in this paper a new method for removing this kind of multiples, called model-driven shallow-water-layer multiple attenuation. We first build an initial model in domain with water velocity and depth, and then predict shallow water-layer multiple with wavelength continuation method. Finally we attenuate multiples from seismic data with self-adaption subtraction. Both model tests and real data processing show that the proposed method can attenuate shallow-water-layer multiples.
Zhang Xingyan, Zhu Jiangmei, Yang Wei et al. Group technology of antimultiple in marine seismic data processing and its application. Geophysical & Geochemical Exploration, 2011, 35(4): 511-515.
[3]
王汝珍. 多次波识别与衰减. 勘探地球物理进展,2003, 26(6): 423-425.
Wang Ruzhen. Recognition and suppression of multiple waves. Progress in Exploration Geophysics, 2003, 26(6): 423-425.
Zhang Junhua, Miao Yanshu, Zheng Xugang et al. Several theoretical issues of de-multiple iscussed by using predictive deconvolution. Computing Technologies for Geophysical and Geochemical Exploration,2009,31(1): 6-10.
Niu Binhua, Sheng Cao, Huang Xinwu. The progress of attenuation multiple using wave equation method. Progress in Geophysics, 2002,17(3):480-485.
[13]
马继涛,Sen K M,陈小宏等.海底电缆多次波压制方法研究.地球物理学报,2011, 54(11):2960-2966. Ma Jitao, Sen K M, Chen Xiaohong et al. OBC multiple attenuation technique using SRME theory. Chinese Journal of Geophysics, 2011, 54(11):2960-2966.