• Angle-domain common-image gathers from anisotropic Gaussian beam migration and its application to anisotropy-induced imaging errors analysis

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    • Keywords

       

      Gaussian beam migration; anisotropy; angle-domain common-image gathers; numerical analysis.

    • Abstract

       

      An approach for extracting angle-domain common-image gathers (ADCIGs) from anisotropic Gaussian beam prestack depth migration (GB-PSDM) is presented in this paper. The propagation angle is calculated in the process of migration using the real-value traveltime information of Gaussian beam. Based on the above, we further investigate the effects of anisotropy on GB-PSDM, where the corresponding ADCIGs are extracted to assess the quality of migration images. The test results of the VTI syncline model and the TTI thrust sheet model show that anisotropic parameters ε, δ, and tilt angle θ, have a great influence on the accuracy of the migrated image in anisotropic media, and ignoring any one of them will cause obvious imaging errors. The anisotropic GB-PSDM with the true anisotropic parameters can obtain more accurate seismic images of subsurface structures in anisotropic media.

    • Author Affiliations

       

      Jianguang Han1 Yun Wang2 Changqing Yu1 Peng Chen3

      1. Institute of Geology, Chinese Academy of Geological Sciences, Beijing 100037, China
      2. School of Geophysics and Information Technology, China University of Geosciences, Beijing 100083, China.
      3. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Chengdu University of Technology, Chengdu 610059, China.
    • Dates

       
  • Journal of Earth System Science | News

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