Results 11 to 20 of about 3,752,884 (240)
Regularized Elastic Full Waveform Inversion Using Deep Learning [PDF]
81st EAGE Conference and Exhibition 2019, 2019 ABSTRACT Obtaining high-resolution models of the earth, especially around the reservoir, is crucial to properly image and interpret the subsurface. We have developed a regularized elastic full-waveform inversion (FWI) method that uses facies as the prior information. Deep neural networks (DNNs) are trained to estimate the distribution
Zhang, Zhendong, Alkhalifah, Tariq Ali
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3D elastic time-frequency full-waveform inversion [PDF]
, 2015 In this work I present the theory and implementation of a 3D elastic full waveform inversion. The implementation is based on the adjoint-state method using a time-frequency approach. Synthetic applications in transmission acquisition geometry show the ability of the method to reconstruct elastic parameters of different 3D subsurface structures ...
Butzer, Simone
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Multiparameter Elastic Full Waveform Inversion With Facies Constraints [PDF]
SEG Technical Program Expanded Abstracts 2017, 2017 Full waveform inversion (FWI) aims fully benefit from all the data characteristics to estimate the parameters describing the assumed physics of the subsurface.
Zhen-dong Zhang +2 more
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Adaptive data-selection elastic full-waveform inversion [PDF]
SEG Technical Program Expanded Abstracts 2018, 2018 The multiscale inversion strategy is widely used to mitigate the cycle-skipping problem in full waveform inversion. There are many different approaches to implement the multiscale inversion and the widely used low-to-high frequency continuation is not ...
Zhen-dong Zhang, Tariq Alkhalifah
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Waveform inversion of the S reflector west of Spain: fine structure of a detachment fault. [PDF]
, 2005 The S reflection west of Iberia has been interpreted as a low-angle detachment fault separating crustal fault blocks from partially serpentinized mantle. We apply full waveform inversion to investigate the fine structure of S.
Minshull, TA +7 more
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The imprint of crustal density heterogeneities on regional seismic wave propagation [PDF]
, 2016 Density heterogeneities are the source of mass transport in the Earth. However, the 3-D density structure remains poorly constrained because travel times of seismic waves are only weakly sensitive to density.
A. Fichtner +7 more
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Geosciences, 2021 The depth velocity model is a critical element for providing seismic data processing success, as it is responsible for the times of waves’ propagation and, therefore, prescribes the location of geological objects in the resulting seismic images ...
Vladimir Tcheverda, Kirill Gadylshin
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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 modified symplectic discontinuous Galerkin method for acoustic and elastic wave simulations
Frontiers in Earth Science, 2023 Numerically solving seismic wave equations is vital to large-scale forward modeling and full waveform inversion. In this paper, a new modified symplectic discontinuous Galerkin (MSDG) method is proposed to solve the acoustic and elastic equations.
Xijun He +4 more
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Underground Space, 2018 We present and compare two flexible and effective methodologies to predict disturbance zones ahead of underground tunnels by using elastic full-waveform inversion.
Andre Lamert +3 more
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