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Pure qP-wave least-squares reverse time migration in vertically transverse isotropic media and its application to field data

  • Seismic Migration and Imaging
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Abstract

The anisotropic properties of subsurface media cause waveform distortions in seismic wave propagation, resulting in a negative influence on seismic imaging. In addition, wavefields simulated by the conventional coupled pseudo-acoustic equation are not only affected by SV-wave artifacts but are also limited by anisotropic parameters. We propose a least-squares reverse time migration (LSRTM) method based on the pure qP-wave equation in vertically transverse isotropic media. A finite difference and fast Fourier transform method, which can improve the efficiency of the numerical simulation compared to a pseudo-spectral method, is used to solve the pure qP-wave equation. We derive the corresponding demigration operator, migration operator, and gradient updating formula to implement the LSRTM. Numerical tests on the Hess model and field data confirm that the proposed method has a good correction effect for the travel time deviation caused by underground anisotropic media. Further, it significantly suppresses the migration noise, balances the imaging amplitude, and improves the imaging resolution.

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Authors and Affiliations

  1. Department of Geophysics, School of Geosciences, China University of Petroleum, Qingdao, 266580, China

    Jian-Ping Huang, Xin-Ru Mu & Zhen-Chun Li

  2. Geophysical Exploration Research Institute, Zhongyuan Oilfield Company, Henan Puyang, 457001, China

    Qing-Yang Li & Yun-Dong Guo

  3. Sinopec Geophysical Research Institute, Nanjing, 211103, China

    Shuang-Qi Yuan

Authors
  1. Jian-Ping Huang
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  2. Xin-Ru Mu
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  3. Zhen-Chun Li
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  4. Qing-Yang Li
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  5. Shuang-Qi Yuan
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  6. Yun-Dong Guo
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Corresponding author

Correspondence to Xin-Ru Mu.

Additional information

This study work was financially supported by the National Key R&D Program of China (No. 2019YFC0605503), the Major Scientific and Technological Projects of CNPC (No. ZD2019-183-003), and the National Natural Science Foundation of China (No. 41922028; 41874149).

Huang Jian-ping received his Ph.D. from the University of Science and Technology of China. He is presently a Professor at the Department of Geophysics, China University of Petroleum (East China). His research interests include seismic wave forward modeling and migration in complex media, Gaussian beam migration imaging, diffraction wave imaging, least-squares reverse time migration, and full waveform inversion.

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Huang, JP., Mu, XR., Li, ZC. et al. Pure qP-wave least-squares reverse time migration in vertically transverse isotropic media and its application to field data. Appl. Geophys. 17, 208–220 (2020). https://doi.org/10.1007/s11770-020-0809-7

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  • DOI: https://doi.org/10.1007/s11770-020-0809-7

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