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Implementation technology of Kirchhoff demigration

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Demigration refers to directly applying a specific imaging technique to a migrated section.It is applied primarily to seismic data mapping.In a previous research study,a time-efficient implementation technology of demigration was expounded.In the present study,the Fast Marching Method (FMM) used for traveltime 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 demigration 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.

demigrationtravel-time computationapertureantialiasing

XU Yangyang、SUN Jianguo、SUN Hui、SUN Huiqiu、JIANG Panpan、ZHAO Sihang

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College of Geo-Exploration Science and Technology, Jilin University, Changchun 130026, China

College of Geographic Space Information, Information Engineering University, Zhengzhou 450052, China

Supported by the National Natural Science Foundation of China

41274120

2015

10.3969/j.issn.1673-9736.2015.04.08

世界地质(英文版)
吉林大学 东北亚国际地学研究与教学中心

世界地质(英文版)

影响因子：0.125
ISSN：1673-9736
年,卷(期)：2015.18(4)
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