物探化探计算技术2017，Vol.39Issue(3)：354-358,5.DOI:10.3969/j.issn.1001-1749.2017.03.09
基于互相关成像条件的保幅高斯束逆时偏移
Amplitude-preserved reverse time migration with Gaussian beam based on crosscorrelation imaging conditions
摘要
Abstract
Conventional reverse-time migration is based on the two-way wave equation.Actually we can rely on Kirchhoff integral for propagated wave-fields to realize reverse-time migration.Our method relies on the calculation of the Green functions for the classical wave equation by performing a summation of Gaussian beams for the direct and back propagated wave-fields.The subsurface image is obtained by calculating the amplitude preserved coherence between the direct and back propagated wave-fields.This method combines the advantages of the high computational speed of ray-based migration with the high accuracy of reverse-time wave-equation migration because it can overcome problems with caustics, yield good images of steep flanks, and is readily extendible to target-oriented implementation.It also can eliminate the geometric diffusion effect and amplitude error caused by the incident angle changes in the process of migration.关键词
高斯束/格林函数/逆时偏移/保幅Key words
Gaussian beam/Green function/reverse-time migration/amplitude-preserved分类
天文与地球科学引用本文复制引用
李振春,李雪松,肖建恩,胡博凯..基于互相关成像条件的保幅高斯束逆时偏移[J].物探化探计算技术,2017,39(3):354-358,5.基金项目
国家自然科学基金(41204086) （41204086）
