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Related Experiment Videos

Full waveform inversion with optimal basis functions.

Gang Sun1, Qianshun Chang, Ping Sheng

  • 1Department of Physics, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong, China.

Physical Review Letters
|April 12, 2003
PubMed
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This study demonstrates accurate seismic inversion for layered acoustic systems using alternating step and block functions. The method effectively images thin layers and withstands significant noise, offering a robust approach for geophysical exploration.

Area of Science:

  • Geophysics
  • Seismic Imaging
  • Acoustic Systems

Background:

  • Full waveform inversion (FWI) is crucial for seismic imaging.
  • Layered acoustic systems present challenges for traditional inversion methods.
  • Accurate subsurface characterization requires robust inversion techniques.

Purpose of the Study:

  • To develop an accurate full waveform inversion method for layered acoustic systems.
  • To utilize alternating function bases for improved inversion results.
  • To assess the method's robustness against noise and its ability to resolve thin layers.

Main Methods:

  • Employed an approach based on Tarantola and Gauthier et al.
  • Utilized alternate bases: step (linear) functions and block (quasi-delta) functions.

Related Experiment Videos

  • Initiated inversion from a uniform background model.

    • Main Results:

    • Achieved accurate full waveform inversion results for layered acoustic systems.
    • Demonstrated robustness against additive white noise up to 20% of the signal.
    • Successfully resolved layers comparable to or smaller than a wavelength in thickness.

    Conclusions:

    • The alternate use of step and block function bases provides accurate FWI results.
    • The developed method is robust and capable of resolving thin geological layers.
    • The approach offers a reliable tool for geophysical exploration and subsurface imaging.