【摘要】 海洋多次波是海洋地震资料处理中最难去除的噪声,目前时空域预测反褶积、SRME、高精度拉冬切除等方法均能有效衰减部分多次波,但对于强反射界面(如硬海底,海底以下高速层等)产生的多次波,单独采用以上方法仍会产生能量较强的残余多次波,针对该问题,根据多次波与一次波周期性差异在线性拉东域比时空域更为明显且有利于压制长周期多次波的特点,可以将线性拉东域预测反褶积技术作为SRME、高精度拉东切除技术的补充,取长补短,联合应用消除深水海底多次波.本文对线性拉东域预测反褶积的基本原理进行了阐述,讨论了如何选取参数,并对其应用范围进行了分析.将线性拉东域预测反褶积应用于南海某凹陷海洋资料的多次波衰减处理中,有效的消除了残余海底多次波,验证了该方法的实用性.更多还原

【Abstract】 Ocean multiples is always the serious noise during marine seismic processing.Prediction deconvolution in time-space domain,SRME,and Radon filtering can eliminate most of multiples,but in the case of multiples generated from strong reflection interface(hard ocean bottom,high velocity layer etc.),these methods would still remain some strong residual multiples if only use one single method.According to the Characteristic that Prediction deconvolution in linear radon domain has better periodicity discrimination to attenuate long period multiples than in time-space domain,it’s preferred to combine prediction deconvolution in linear radon domain as complement into the flow of deep water-bottom multiples attenuation.This paper states the basic principle of this method,gives some suggestion about its parameter selection,and analysis some problems,then apply this method into the flow of multiples attenuation on marine seismic data in a sag of the South China Sea,the residual multiple has been eliminated effectively,and the good result validates the practical applicability of this method.更多还原