Implementation technology of Kirchhoff demigration  

作　　者：XU Yangyang SUN Jianguo SUN Hui SUN Huiqiu JIANG Panpan ZHAO Sihang 

机构地区：[1]College of Geo-Exploration Science and Technology,Jilin University [2]College of Geographic Space Information,Information Engineering University

出　　处：《Global Geology》2015年第4期252-257,共6页世界地质（英文版）

基　　金：Supported by the National Natural Science Foundation of China(No.41274120)

摘　　要：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-staek 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.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.

关 键 词：DEMIGRATION travel-time computation APERTURE antialiasing 

分 类 号：P631.4[天文地球—地质矿产勘探] P631.44[天文地球—地质学]