1887

Abstract

Summary

The second-order 9-point finite-difference scheme in frequency-space domain with PML absorbing boundary can not meet the actual needs because of the complex structure of the underground medium. We proposed a new method of seismic modeling based on the fourth-order 17-point difference technique which based on the fourth-order 9-point finite-difference of difference and a multi-axial nonsplit convoluntion perfectly matched layer (MCPML) absorbing boundary .17-point finite-difference modeling in frequency-space domain has high precision and weak numerical dispersion,and it is more suitable for seismic simulation under complex geological conditions. Comparing with traditional perfectly matched layer (PML) absorbing boundary,MCPML combines the advantages of nonsplit convolution (CPML) absorbing boundary and multi-axial perfectly matched layer (MPML) absorbing boundary to improve the absorption of wave field with large incident angle without increasing computational burden, meanwhile, the non-split method is easy to program. The method of this paper is applied to the Marmousi model to verify the effectiveness of it.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.201801713
2018-06-11
2020-07-14
Loading full text...

Full text loading...

References

  1. CaoHongshu, ChenJingbo
    . A 17-point scheme and its numerical implementation for high-accuracy modeling of frequency-domain acoustic equation. Chinese Journal of Geophysics, 2012, 55(10): 3440–3449.
    [Google Scholar]
  2. TianKun, HuangJianping, LiZhenchun et al.
    Multi-axial convolution perfectly matched layer absorption boundary condition. OGP, 2014, 49(1): 143–152.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.201801713
Loading
/content/papers/10.3997/2214-4609.201801713
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error