Results 31 to 40 of about 40,315 (288)
Reflection full waveform inversion [PDF]
Science China Earth Sciences, 2017 Because of the combination of optimization algorithms and full wave equations, full-waveform inversion (FWI) has become the frontier of the study of seismic exploration and is gradually becoming one of the essential tools for obtaining the Earth interior information. However, the application of conventional FWI to pure reflection data in the absence of
Gang Yao, Di Wu
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Full waveform inversion with extrapolated low frequency data [PDF]
, 2016 The availability of low frequency data is an important factor in the success of full waveform inversion (FWI) in the acoustic regime. The low frequencies help determine the kinematically relevant, low-wavenumber components of the velocity model, which ...
Demanet, Laurent, Li, Yunyue Elita
core +2 more sources
Frontiers in Earth Science, 2022 To better interpret the subsurface structures and characterize the reservoir, a depth model quantifying P-wave velocity together with additional rock’s physical parameters such as density, the S-wave velocity, and anisotropy is always preferred by ...
Zhonghan Liu +2 more
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Acoustic 2D full waveform inversion to solve gas cloud challenges
Annals of Geophysics, 2015 The existing conventional inversion algorithm does not provide satisfactory results due to the complexity of propagated wavefield though the gas cloud.
Srichand Prajapati, Deva Ghosh
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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 +4 more
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Rapid 4D FWI using a local wave solver [PDF]
, 2016 Much of the computational cost involved in full-waveform inversion comes from the solution of the wave equation in a large domain. These computations must be done for the entire domain through which we expect waves to pass for a particular survey ...
Malcolm, Alison, Willemsen, Bram
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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 +6 more
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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 +5 more
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Regularizing velocity differences in time-lapse FWI using gradient mismatch information [PDF]
, 2015 We present a method for recovering time-lapse velocity changes using full waveform inversion (FWI). In a preprocessing step we invert for a single intermediate model by simultaneously minimizing the data misfit in the baseline and the monitor surveys. We
Maharramov M. +3 more
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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 +4 more
doaj +1 more source