Near-surface 2D imaging via FWI of DAS data: An examination on the impacts of FWI starting model

MBS Yust, BR Cox, JP Vantassel, PG Hubbard… - Geosciences, 2023‏ - mdpi.com
Full waveform inversion (FWI) and distributed acoustic sensing (DAS) are powerful tools with
potential to improve how seismic site characterization is performed. FWI is able to provide …

Localized adaptive waveform inversion: Theory and numerical verification

P Yong, R Brossier, L Métivier… - Geophysical Journal …, 2023‏ - academic.oup.com
Correctly interpreting phase events thanks to data processing techniques based on
correlation or deconvolution has been the focus of numerous studies in the field of high …

Efficient least-squares reverse time migration in TTI media using a finite-difference solvable pure qP-wave equation

Q Mao, J Huang, X Mu, Z Zhang… - Journal of Geophysics …, 2024‏ - academic.oup.com
The anisotropic characteristics of underground media play a crucial role in seismic wave
propagation and should be accounted for during seismic imaging. The least-squares …

Deep velocity generator: A plug-in network for FWI enhancement

Y Wang, B Jiang, Z Wei, W Lu - IEEE Transactions on …, 2023‏ - ieeexplore.ieee.org
Known for its great potential for determining subsurface properties quantitatively, full-
waveform inversion (FWI) is a hot topic in the field of exploration seismology. The success of …

Source-independent full-waveform inversion based on convolutional Wasserstein distance objective function

S Jiang, H Chen, H Li, H Zhou, L Wang… - … on Geoscience and …, 2023‏ - ieeexplore.ieee.org
Full-waveform inversion (FWI), as a high-precision model building method, plays an
invaluable role in seismic exploration. The accuracy of conventional FWI is universally …

A three‐dimensional shape optimization for transient acoustic scattering problems using the time‐domain boundary element method

T Takahashi, N Miyazawa… - International Journal for …, 2023‏ - Wiley Online Library
We develop a three‐dimensional shape optimization (SO) framework for the wave equation
with taking the unsteadiness into account. Resorting to the adjoint variable method, we …

Waveform inversion of seismic first arrivals acquired on irregular surface

X Li, G Yao, F Niu, D Wu, N Liu - Geophysics, 2022‏ - pubs.geoscienceworld.org
The irregular topography of the earth's surface and low signal-to-noise ratios of land seismic
data bring challenges to full-waveform inversion (FWI). We propose a robust method for …

Least-squares migration with a blockwise Hessian matrix: A prestack time-migration approach

B Jiang, J Zhang - Geophysics, 2019‏ - pubs.geoscienceworld.org
We have developed an explicit inverse approach with a Hessian matrix for the least-squares
(LS) implementation of prestack time migration (PSTM). A full Hessian matrix is divided into …

Reducing the low-wavenumber dispersion error by building the Lagrange dual problem with a powerful local restriction

W Peng, J Huang, Y Shen - Journal of Geophysics and …, 2023‏ - academic.oup.com
The broadband finite-difference (FD) coefficients computed by a cost function have been
widely applied to suppress of numerical dispersion. Under the same conditions, the FD …

Multi-scale full waveform inversion based ongradient decomposition in wavenumber domain

ZC LI, ZY WANG, JP HUANG, C CUI - Chinese Journal of Geophysics, 2022‏ - en.dzkx.org
Abstract Full Waveform Inversion (FWI) is a powerful tool to reconstruct velocity model with
high resolution. It is the combination of tomography mode and migration mode, however, the …