Global Geology 2015, 18(4) 252- DOI:     ISSN: 1673-9736 CN: 22-1371/P

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Keywords
demigration
travel- time computation
aperture
antialiasing
Authors
XU Yangyang
SUN Jianguo
SUN Hui
SUN Huiqiu
JIANG Panpan and ZHAO Sihang
PubMed
Article by Xu Y
Article by Sun J
Article by Sun H
Article by Sun H
Article by Jiang PAZS

Implementation technology of Kirchhoff demigration

XU Yangyang, SUN Jianguo, SUN Hui, SUN Huiqiu, JIANG Panpan and ZHAO Sihang

1. College of Geo- Exploration Science and Technology,Jilin University,Changchun 130026,China; 2. College of Geographic Space Information,Information Engineering University,Zhengzhou 450052,China

Abstract

Demigration refers to directly applying a specific imaging technique to a migrated section. It is ap- plied primarily to seismic data mapping. In a previous research study,a time- efficient implementation techno- logy of demigration was expounded. In the present study,the Fast Marching Method (FMM) used for travel- time computation in the isochrone- stack demigration, is developed. Furthermore, other key techniques (such as selection of aperture and antialiasing filtering factor) are analyzed in detail. Besides,the detail implementation method and program flow are given,which is shown their good computational efficiency and high- quality demi- gration effect. This implementation technique is illustrated with both the V(z) model and Marmousi model. It provides a basic method for implementing demigration in the application of seismic data mapping.

Keywords demigration   travel- time computation   aperture   antialiasing  
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