线性Radon变换在地震面波压制中的应用  

Application of linear Radon transform in seismic surface wave suppression

作　　者：张智 张迪[1,2] 王敏玲 唐国彬[1,2] 孙丽霞 任琴琴[1,2] ZHANG Zhi;ZHANG Di;WANG Min-ling;TANG Guo-bin;SUN Li-xia;REN Qin-qin(a. Guangxi Nonferrous Metal Concealment Deposit Exploration and Material Development Collaborative Innovation Cen-te;b. Guangxi Key Laboratory of Hidden Metallic Ore Deposits Exploration, Guilin University of Technology, Guilin 541004, Chin)

机构地区：[1]桂林理工大学广西有色金属隐伏矿床勘查及材料开发协同创新中心,广西桂林541004 [2]桂林理工大学广西隐伏金属矿产勘查重点实验室,广西桂林541004

出　　处：《桂林理工大学学报》2017年第4期594-601,共8页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(41574078;41274070;41174075;41174043);广西自然科学基金项目(2013GXNSFAA019271;2015GXNSFAA139238);广西壮族自治区地质资源与地质工程"八桂学者"经费专项(2013)

摘　　要：面波的高振幅、强能量和频散特性,降低了反射地震记录的信噪比。为了压制反射记录中的面波信息,提高反射资料的信噪比,先利用有限差分对几种典型的地质模型进行了正演模拟,借助于线性Radon变换对合成记录进行面波压制;采用曲线速度滤波消减Radon变换产生的端点效应和假频的影响。通过对大量理论模型的研究,证明了Radon变换对压制相干噪声有较好的的应用效果,可有效地压制地震面波的干扰。经对实际的地震数据应用线性Radon变换方法压制面波,对处理后的数据进行分析,取得了较好的效果。Strong surface wave of high amplitude,energy and dispersion property reduces the reflected signal to noise ratio of seismic record. In order to suppress the surface wave reflection record information,and improve the signal-to-noise ratio of the reflection data,this paper used the finite difference of several kinds of typical geological model for the forward modeling. With the help of linear Radon transform surface wave suppression for synthetic records,the curve velocity filtering is used to reduce Radon transform the endpoint effect and the effects of aliasing. Through a large number of theoretical model,using the Radon transform to suppress coherent noise in seismic data processing has good application and can effectively suppress the seismic surface wave interference. Finally,the actual seismic data linear Radon transformation method is applied to suppress the surface wave,and analyze the data after processing,better processing results are achieved.

关 键 词：地震面波 有限差分 曲线速度滤波 线性Radon变换 

分 类 号：P631.41[天文地球—地质矿产勘探]