Results 31 to 40 of about 4,182 (258)

A Physics-Based Neural-Network Way to Perform Seismic Full Waveform Inversion

IEEE Access, 2020
Seismic full waveform inversion is a common technique that is used in the investigation of subsurface geology. Its classic implementation involves forward modeling of seismic wavefield based on a certain type of wave equation, which reflects the physics ...
Yuxiao Ren, Xinji Xu, Senlin Yang, Lichao Nie, Yangkang Chen   +4 more
doaj   +1 more source

Source-Independent Waveform Inversion Method for Ground Penetrating Radar Based on Envelope Objective Function

Remote Sensing, 2022
For the full waveform inversion, it is necessary to provide an accurate source wavelet for forwarding modeling in the iteration. The source wavelet estimation method based on deconvolution technology can solve this problem to some extent, but we find ...
Xintong Liu, Sixin Liu, Chaopeng Luo, Hejun Jiang, Hong Li, Xu Meng, Zhihui Feng   +6 more
doaj   +1 more source

Full-Waveform Inversion of Time-Lapse Crosshole GPR Data Using Markov Chain Monte Carlo Method

Remote Sensing, 2021
Crosshole ground-penetrating radar (GPR) is an important tool for a wide range of geoscientific and engineering investigations, and the Markov chain Monte Carlo (MCMC) method is a heuristic global optimization method that can be used to solve the ...
Shengchao Wang, Liguo Han, Xiangbo Gong, Shaoyue Zhang, Xingguo Huang, Pan Zhang   +5 more
doaj   +1 more source

Interferometric full-waveform inversion [PDF]

Geophysics, 2018
ABSTRACT Velocity errors in the shallow part of the velocity model can lead to erroneous estimates of the full-waveform inversion (FWI) tomogram. If the location and topography of a reflector are known, then such a reflector can be used as a reference reflector to update the underlying velocity model. Reflections corresponding to this
Sinha, Mrinal, Schuster, Gerard T.
openaire   +2 more sources

3D anisotropic full-waveform inversion for complex salt provinces

Frontiers in Earth Science, 2023
Seismic imaging and inversion become extremely challenging when dealing with salt structures. Conventional state-of-the-art full-waveform inversion (FWI) fails to recover those features in areas where salt is present.
Junxiao Li, Herurisa Rusmanugroho, Mahesh Kalita, Kefeng Xin, Farah Syazana Dzulkefli   +4 more
doaj   +1 more source

Chapter 5 Full waveform inversion [PDF]

, 2020
In the geophysics of oil exploration and reservoir studies, the surface seismic method is the most commonly used method to obtain a subsurface model in 2 or 3 dimensions. This method plays an increasingly important role in soil investigations for geotechnical, hydrogeological and site characterization studies regarding seismic hazard issues.
openaire   +3 more sources

3D Bayesian Variational Full-Waveform Inversion

Geophysical Journal International, 2023
Seismic full-waveform inversion (FWI) produces high resolution images of the subsurface by exploiting information in full acoustic, seismic or electromagnetic waveforms, and has been applied at global, regional and industrial spatial scales. FWI inverse problems are traditionally solved by using optimization, in which one seeks a best model by ...
Xin Zhang, Angus Lomas, Muhong Zhou, York Zheng, Andrew Curtis   +4 more
openaire   +3 more sources

Optimal Inversion Method Based on Joint Waveform Inversion and Least Squares Reverse Time Migration [PDF]

Lithosphere
Joint Waveform inversion (JWI) uses the results of reflection waveform inversion (RWI) as the initial model for full waveform inversion (FWI). Compared with the FWI, the JWI method can obtain more information about the structure of the subsurface medium.
Kai Zhang, Yipeng Xu, Zhenchun Li, Zilin He, Yiming Pan   +4 more
doaj   +1 more source

Case studies of ultrasonic full waveform inversion for inspecting concrete structures

e-Journal of Nondestructive Testing
The non-destructive evaluation of reinforced pre-stressed concrete structures is critical to prevent catastrophic failures of aging infrastructure. Conventional non-destructive inspection methods often rely on manual and subjective interpretation of the
David Sollberger, Chris Udell, Lion Krischer, Christian Boehm, Elmar Strobach, David Corbett   +5 more
doaj   +1 more source

3D variable-grid full-waveform inversion on GPU

Petroleum Science, 2019
Full-waveform inversion (FWI) is a powerful tool to reconstruct subsurface geophysical parameters with high resolution. As 3D surveys become widely implemented, corresponding 3D processing techniques are required to solve complex geological cases, while ...
Zi-Ying Wang, Jian-Ping Huang, Ding-Jin Liu, Zhen-Chun Li, Peng Yong, Zhen-Jie Yang   +5 more
doaj   +1 more source