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Global Geology 2020, 23(3) 149-154 DOI: 10.3969/j.issn.1673-9736.2020.03.02 ISSN: 1673-9736 CN: 22-1371/P

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	Kirchhoff beam migration
	angle-domain common image gathers
	beam propagator
	travel time calculation
	本文作者相关文章
	ZHANG Zhihou
	YAO Yu
	SUN Hui
	YANG Junjie
	LI Meng
	PubMed
	Article by Zhang Z
	Article by Yao Y
	Article by Sun H
	Article by Yang J
	Article by Li M

Method for extracting angle-domain common image gathers in Kirchhoff beam migration

ZHANG Zhihou¹, YAO Yu¹, SUN Hui^1,2, YANG Junjie¹, LI Meng¹

1. Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu 611756, China;
2. School of Resources and Environment, University of Electronic Science and Technology of China, Chengdu 611731, China

摘要： Kirchhoff beam migration is a simplified Gaussian beam migration, which omits the dynamic information and can calculate multi-arrival traveltime, so it is a high-precision and fast seismic imaging method. In the imaging process, extracting common image gathers can be used for velocity analysis, improving the accuracy of modeling and imaging quality. Compared with the conventional common image gathers extracting methods, the angle-domain common image gathers extracting method can avoid the artifacts caused by multi-arrival seismic waves. The authors present a new method of extracting common image gathers in angle-domain from Kirchhoff beam migration and verify the method by numerical calculations.

关键词： Kirchhoff beam migration angle-domain common image gathers beam propagator travel time calculation

Method for extracting angle-domain common image gathers in Kirchhoff beam migration

ZHANG Zhihou¹, YAO Yu¹, SUN Hui^1,2, YANG Junjie¹, LI Meng¹

Abstract: Kirchhoff beam migration is a simplified Gaussian beam migration, which omits the dynamic information and can calculate multi-arrival traveltime, so it is a high-precision and fast seismic imaging method. In the imaging process, extracting common image gathers can be used for velocity analysis, improving the accuracy of modeling and imaging quality. Compared with the conventional common image gathers extracting methods, the angle-domain common image gathers extracting method can avoid the artifacts caused by multi-arrival seismic waves. The authors present a new method of extracting common image gathers in angle-domain from Kirchhoff beam migration and verify the method by numerical calculations.

Keywords: Kirchhoff beam migration angle-domain common image gathers beam propagator travel time calculation

收稿日期 2020-01-06 修回日期 2020-03-01 网络版发布日期

DOI: 10.3969/j.issn.1673-9736.2020.03.02

基金项目:

Supported by projects of the Natural Science Foundation of China (No. 41804100), the China Postdoctoral Science Foundation (No. 2018M640910) and the Fundamental Research Funds for the Central Universities (No.2682018CX36)

通讯作者: SUN Hui

作者简介:

作者Email: sunhui@swjtu.edu.cn

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