Title

Generation mechanism and characteristics of two kinds of harmonic waves for vibroseis

单位

(1.中国石油大学地球科学与技术学院,山东青岛266580;2.中国石油化工集团石油工程地球物理有限公司,北京100029;3.中国石油化工集团石油工程地球物理有限公司胜利分公司,山东东营257086;4.中国石油化工集团胜利油田有限公司物探研究院,山东东营257022)

Organization

(1.School of Geosciences,China University of Petroleum,Qingdao 266580,China;2.Sinopec Petroleum Engineering Geophysical Limited Corporation,Beijing 100029,China;3.Shengli Branch,Sinopec Petroleum Engineering Geophysical Limited Corporation Dongying 257086,China;4.Shengli Geophysical Research Institute of SINOPEC,Dongying 257022,China)

摘要

在可控震源地震勘探过程中,谐波干扰不可避免。特别是随着可控震源高效采集方式的出现和不断发展,谐波干扰成为制约可控震源技术发展的主要因素。为了准确压制谐波干扰,对谐波干扰产生的机理与特征进行了研究,发现谐波干扰产生的原因主要有:①机械系统畸变产生的谐波;②表层介质响应畸变产生的谐波。通过对野外采集资料的分析和正演模拟揭示了两种谐波的产生机理和特征,并用来指导两种谐波干扰的压制。

Abstract

During vibroseis exploration,the harmonic noise is inevitable due to various factors.Especially along with the development of vibroseis efficient acquisition,the harmonic interference has become the main factors restricting the development of the vibroseis technology.In order to eliminate the harmonic noise accurately,we studied the generation mechanism and characteristics of the harmonic wave and concludes that there are two kinds of harmonic waves: the first type is caused by mechanical system distortion;the second type is caused by surface response distortion.The mechanism and characteristics of the two kinds of harmonic waves are revealed by analyzing the real data and forward modeling,which can be used to guide the elimination of the two harmonic waves.

关键词：

可控震源; 谐波; 机械系统畸变; 表层响应畸变;

Keywords:

vibroseis,; harmonic wave,; mechanical system distortion,; surface response distortion;

基金项目

国家重点基础研究发展计划(973计划)项目(2014CB239006,2011CB202402)、国家自然科学基金(41104069,41274124)和中央高校基本科研业务费专项资金(R1401005A,15CX06005A)联合资助。

DOI

10.3969/j.issn.1000-1441.2016.02.001

可控震源两种谐波产生机理与特征研究