一种基于τ-p域自适应的平缆鬼波压制方法  

An adaptive suppression method of horizontal cable ghost waves based in the τ-p domain

作　　者：王艳冬 王建花 王小六 孙文博 张金淼 张云鹏 WANG Yandong;WANG Jianhua;WANG Xiaoliu;SUN Wenbo;ZHANG Jinmiao;ZHANG Yunpeng(CNOOC Research Institute Co.,Ltd.,Beijing 100028,China;National Engineering Laboratory for Offshore Oil Exploration,Beijing 100028,China)

机构地区：[1]中海油研究总院有限责任公司,北京100028 [2]海洋石油勘探国家工程实验室,北京100028

出　　处：《中国海上油气》2018年第6期71-79,共9页China Offshore Oil and Gas

基　　金："十三五"国家科技重大专项"中国近海中深层地震勘探关键技术(编号:2016ZX05024-001)";海洋石油勘探国家工程实验室自由探索课题部分研究成果

摘　　要：海上常规拖缆采集通常将震源和电缆沉放至一定的深度,由于海面的存在造成鬼波的干涉作用,使得地震资料中存在明显的陷频等现象,制约了海上宽频地震勘探的发展。本文提出了一种基于τ-p域自适应参数估计的平缆鬼波压制方法,可以在τ-p域自适应求取震源沉放深度、电缆沉放深度及海面反射系数,完全数据驱动,无需先验信息。理论模型测算及实际资料应用结果表明,本文提出的方法理论正确,具有较强的实用性,能有效压制平缆的电缆鬼波与震源鬼波,拓宽地震资料的频带范围,补偿由于鬼波引起的陷波,且该方法较为灵活,可以根据实际需求选择鬼波的类型对其进行压制。During conventional marine towrope acquisition,the seismic source and cable are usually located at a certain depth below the water.Due to the existence of sea surface,the interference of ghost waves leads to flaws like obvious notching in the seismic data,which restricts the development of offshore wide-band seismic exploration.In this paper,a suppression method of horizontal cable ghost waves was proposed,which can obtain the estimated adaptive parameters based in theτ-p domain.As a fully data driving method,it can adaptively acquire the immersing depth of seismic source and cable as well as the sea surface reflection coefficient in theτ-p domain,eliminating the need of prior information.The results of theoretical model calculation and practical data application suggest that this method is correct in theory and good in practicability.It can effectively suppress the cable ghost waves and seismic source ghost waves of horizontal cable,broaden the frequency band range of seismic data,and compensate the notching caused by ghost waves.Moreover,this method is flexible,and is able to suppress different types of ghost waves according to the actual needs.

关 键 词：Τ-P域 自适应参数求取 水平电缆 电缆鬼波 震源鬼波 压制方法 

分 类 号：TE132.14[石油与天然气工程—油气勘探]