海底电缆鬼波压制及陷频补偿方法研究  

Research on ghost suppression and notch compensation of dual-sensor ocean bottom cable data

作　　者：李继光[1] 王东凯 LI Jiguang;WANG Dongkai(Shengli Geophysical Research Institute of China Petroleum&Chemical Corporation,Dongying 257000,China)

机构地区：[1]中国石化胜利油田分公司物探研究院,山东东营257000

出　　处：《热带海洋学报》2018年第2期100-104,共5页Journal of Tropical Oceanography

基　　金：国家科技重大专项课题(2011ZX05006-002)~~

摘　　要：受到海底、自由表面等强反射界面的影响,在海底电缆采集的地震资料中鬼波干扰往往非常发育,在频谱中表现为明显的陷频现象,严重影响地震剖面的质量,给后期的处理解释带来困难。为克服这一困难,根据海底电缆双检(陆检和水检)对下行波场的不同响应,在深入研究伪多道匹配滤波技术的基础上提出了伪多道双检合成方法。与传统的求取反射系数的双检合成方法不同,该方法完全数据驱动。在合成数据和渤海地震资料的实际应用中,鬼波成分得到了明显的压制,同时拓宽频带,补偿陷频,证明了该方法的有效性。Because of the influence of strong reflection interfaces such as free surface,seabed,etc.,the ghost produces obvious notches in ocean bottom cable(OBC)spectra.It degrades the quality of sections,and increases the difficulty of processing and interpretation.According to different responses of hydrophone and geophone to down-going wave field,we present a new dual-sensor summation method based on pseudo-multichannel matching filter.Compared with traditional methods,the proposed method is totally data driven,so it does not depend on the reflection coefficient.In practical applications,the method can effectively suppress ghosts,remove notches and expand spectral bandwidth.The good results reveal the effectiveness of this method.

关 键 词：海底电缆 陷频 鬼波 双检合成 伪多道 

分 类 号：P631.425[天文地球—地质矿产勘探]