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<p>Accurate imaging the anisotropic multi-component field data is still a challenging task especially that acquired in areas with complex rugged surface topography. To address these challenges, we propose a new topography anisotropic wave separation elastic reverse time migration (ERTM) method with high efficiency. We first introduce a robust and efficient surface-adaptive modeling scheme based on&#xa0;a traditional finite difference (FD) operator to eliminate the influence of complex irregular surface topography on ERTM. We then develop a new approach for wave-mode separation in vertical transverse isotropic (VTI) media using anisotropic pseudo-decoupled wavefield equations. The vector source and receiver anisotropic P- and S-waves for anisotropic wave separation elastic reverse time migration (AWSERTM) can be efficiently obtained by numerically solving the proposed anisotropic pseudo-decoupled wave equations with the FD method. Synthetic examples demonstrate that the proposed topography anisotropic wave separation elastic reverse time migration (TAWSERTM) is both efficient and stable. It can not only obtain anisotropic P- and S-waves with high efficiency, correct the anisotropy effect, but also effectively eliminate the influence of surface topography on migration results.</p>

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A high-efficiency topography anisotropic wave separation elastic reverse time migration method

  • 期刊论文

  • 发表日期：

    2026年1月14日

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  • Yu Zhong,
  • Qinghui Mao,
  • Kun Zou,
  • Hongyu Zhou,
  • Mei He,
  • Kai Xu,
  • Hanming Gu,
  • Zeyun Shi,
  • Yuan Zhou,
  • Haibo Huang

摘要

Accurate imaging the anisotropic multi-component field data is still a challenging task especially that acquired in areas with complex rugged surface topography. To address these challenges, we propose a new topography anisotropic wave separation elastic reverse time migration (ERTM) method with high efficiency. We first introduce a robust and efficient surface-adaptive modeling scheme based on a traditional finite difference (FD) operator to eliminate the influence of complex irregular surface topography on ERTM. We then develop a new approach for wave-mode separation in vertical transverse isotropic (VTI) media using anisotropic pseudo-decoupled wavefield equations. The vector source and receiver anisotropic P- and S-waves for anisotropic wave separation elastic reverse time migration (AWSERTM) can be efficiently obtained by numerically solving the proposed anisotropic pseudo-decoupled wave equations with the FD method. Synthetic examples demonstrate that the proposed topography anisotropic wave separation elastic reverse time migration (TAWSERTM) is both efficient and stable. It can not only obtain anisotropic P- and S-waves with high efficiency, correct the anisotropy effect, but also effectively eliminate the influence of surface topography on migration results.