Title

The morphologic noise attenuation technology for point source diffracted interference

单位

(1.北京信息科技大学信息与通信工程学院,北京100101;2.中国石油大学(北京)油气资源与探测国家重点实验室,北京102249;3.保利协鑫石油天然气集团控股有限公司,北京100010;4.中国石油天然气集团公司东方地球物理勘探有限责任公司国际勘探事业部,河北涿州072751)

Organization

(1.Information and Communication Engineering Institute,Beijing Information Science and Technology University,Beijing 100101,China;2.State Key Laboratory of Petroleum Resources and Prospecting,China University of Petroleum (Beijing),Beijing 102249,China;3.POLY-GCL Petroleum Group Holdings Limited,Beijing 100010,China;4.BGP International,CNPC,Zhuozhou 072751,China)

摘要

海上地震勘探采集资料中的点源干扰能量强,横向变化幅度小且出现位置不固定,极大地影响了海上地震资料的成像质量和解释精度。采用了基于形态学的噪声压制技术对点源干扰进行处理,设计了形态学滤波器分离点源噪声和有效信号,实现了点源干扰的压制。采用该方法对模拟地震资料和海上实际地震资料进行处理,并与传统的F-K去噪方法进行了对比,结果表明该方法在成功压制点源绕射干扰的同时,能够较好地保留原始地震信号的低频信息,完全恢复了信号与噪声重叠处的有效信号振幅。处理过程中,该方法不受随机噪声的影响,具有很强的抗随机噪声能力。

Abstract

The point source diffracted interference in marine seismic data has the characteristics of large energy,narrow lateral variation and non-fixed position,which greatly affect the imaging quality and interpretation accuracy of the marine seismic data.The noise suppression technique based on the morphology is used to suppress point source diffracted noise.The morphologic filters are designed to separate the signal from the noise and complete the suppression of the point source diffracted noise.The proposed morphologic noise attenuation method was tested on simulation data and actual marine seismic data.Compared with the conventional F-K filter techniques,this method shows it can successfully suppress the point source diffracted noise as well as better retain the low frequency information of the original seismic signal.Moreover,it has a full recovery of the signal amplitude at the position where signal and noise overlap.During processing,the method avoids the effect of random noise and has strong ability of resisting random noise.

关键词：

形态学; 噪声压制; 线性噪声; 双曲干扰; 点源绕射;

Keywords:

morphology,; noise suppression,; linear noise,; hyperbolic interference,; point source diffracted interference;

基金项目

国家重点基础研究发展计划(973计划)项目(2013CB228602)、国家科技重大专项(2011ZX05042-003-002)、北京信息科技大学科研基金项目(1425009)共同资助。

DOI

10.3969/j.issn.1000-1441.2016.03.009

点源干扰的形态学降噪技术