石油物探2017，Vol.56Issue(4)：500-506,7.DOI:10.3969/j.issn.1000-1441.2017.04.005
基于起伏海水表面的拖缆鬼波压制方法
Deghosting method based on a variable sea surface for conventional streamer seismic data
摘要
Abstract
Currently,the deghosting algorithms based on a flat sea surface assumption can not provide a robust deghsoing result,caused by the misestimation of sea surface reflection and ghost delay time.A new method of deghsoting has been developed by solving the least-square linear Radon equation.The up-going wavefield at the sea surface can be obtained and then extrapolate the up-going wavefield forward and backward to the receivers where a least-square imaging condition is applied so that the variation of the sea surface can be estimated.The effect of the variable sea surface on the ghosts can be taken into account by imaging the sea surface.The sea surface is then provided to the correction of the actual depth of the receiver.Finally,we compare the deghosting results using a flat sea surface and a variable sea surface.Less ghost residuals and reduced ringing artifacts are observed when deghosting was performed using a variable sea surface.Test results on synthetic and field data show that the proposed approach can better remove ghost wave and achieve the goal of broadening the bandwidth of seismic data.关键词
鬼波压制/最小平方成像条件/起伏海水表面/最小平方线性拉东反演/拓宽频带Key words
deghosting/least-square imaging condition/variable sea surface/least squares linear Radon inversion/broaden the bandwidth分类
天文与地球科学引用本文复制引用
张威,韩立国,李洪建..基于起伏海水表面的拖缆鬼波压制方法[J].石油物探,2017,56(4):500-506,7.基金项目
国家高技术研究发展计划(863计划)项目(2014AA06A605)资助.The research is financially supported by the Nationl High-tech R & D Program of China (863 Program) (Grant No.2014AA06A605). （863计划）
