物探化探计算技术2017，Vol.39Issue(4)：522-532,11.DOI:10.3969/j.issn.1001-1749.2017.04.13
基于能量范数优化的振幅保真逆时成像条件及其应用优势
An optimal amplitude-preserving reverse time migration imaging condition using energy norm and the advantages of its application
杨鹏 1李振春 1谷丙洛1
作者信息
- 1. 中国石油大学(华东)地球科学与技术学院,青岛 266580
- 折叠
摘要
Abstract
Application of reverse time migration imaging condition is an important procedure of reverse time migration imaging which has a direct effect on reverse time migration image accuracy.The focusing-energy condition and amplitude-preserving image condition have been proposed to improve imaging effect,raise imaging precision and normalized cross correlation condition.Consequently,as a result of studies have been carried out successively by scholars aiming at reverse time migration imaging condition.The goals of raising imaging precision and the realization of low frequency noise suppress and deep energy compensation have been reached to some extent through the conditions mentioned above.Thus,it is necessary to carry out the studies of reverse time migration imaging condition for realizing different imaging requirements.In this paper,we firstly give four reverse time migration imaging conditions,including cross correlation imaging condition,normalize cross correlation imaging condition,focusing energy imaging condition and amplitude-preserving imaging condition.Then we propose an optimal scheme of imaging condition,that is combinatorial optimization strategy,and then derive an optimal amplitude-preserving imaging condition using energy norm.And these five imaging conditions are applied to the tests of simple model and complex model respectively.The contrastive analysis of imaging results from aspects of amplitude compensation and noise suppress illustrates characters and applicability of the optimal amplitude-preserving reverse time migration imaging conditions and outstanding advantages of the optimal amplitude-preserving imaging condition in imaging performance and accuracy,which also verifies the feasibility of the optimal scheme.关键词
逆时偏移/成像条件/归一化互相关成像/能量聚焦成像/振幅保真Key words
reverse time migration/imaging condition/normalized cross correlation image/focusing energy image/amplitude-preserving image分类
天文与地球科学引用本文复制引用
杨鹏,李振春,谷丙洛..基于能量范数优化的振幅保真逆时成像条件及其应用优势[J].物探化探计算技术,2017,39(4):522-532,11.
