Wavefield separation in VTI media with multiple-angle expansion

Heran Wang

doi:10.1117/12.3019572

23 January 2024 Wavefield separation in VTI media with multiple-angle expansion

Heran Wang

Proceedings Volume 12978, Fourth International Conference on Geology, Mapping, and Remote Sensing (ICGMRS 2023); 129782B (2024) https://doi.org/10.1117/12.3019572
Event: 2023 4th International Conference on Geology, Mapping and Remote Sensing (ICGMRS 2023), 2023, wuhan, China

Abstract

With the improvement of imaging accuracy required by oil and gas exploration, the anisotropy of underground media has attracted more and more attention. In order to improve the accuracy and stability of the forward modelling of seismic wavefield in VTI (Transversely isotropic media with a vertical symmetry axis) media. In this paper, a solution based on multiple-angle formula expansion in VTI medium is proposed. Combined with the multiple-angle formula and Taylor's expansion, the harmonic function operator including the pseudo-differential operator is approximated by spectral method, and then a VTI medium based on the multiple-angle formula is solved. Numerical tests based on two-dimensional uniform and complex models show that the proposed method can maintain the stability of the extrapolated wavefield at large time steps. On this basis, the wavefield separation is realized, and the simulation test is carried out by the layered model. The results show that the proposed method is effective for up-down going separation.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Heran Wang "Wavefield separation in VTI media with multiple-angle expansion", Proc. SPIE 12978, Fourth International Conference on Geology, Mapping, and Remote Sensing (ICGMRS 2023), 129782B (23 January 2024); https://doi.org/10.1117/12.3019572

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