Results 11 to 20 of about 3,752,834 (199)

Elastic Full Waveform Inversion for Near-Surface Imaging

, 2006
International audienceWe propose here a method for maging near-surface structures although it can nevertheless be applied for deeper areas characterization.
Grandjean, G., Virieux, J., C. Gélis, Grandjean, Gilles, J. Virieux, G. Grandjean, Gelis, C.   +6 more
core   +4 more sources

3D elastic full-waveform inversion [PDF]

, 2012
Full Waveform Inversion (FWI) is a depth imaging technique that takes advantage of the full information contained in recorded seismic data. FWI provide high resolution images of subsurface properties, usually seismic velocities or related parameters ...
Warner, Mike, Guasch, Lluis
core   +2 more sources

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, Reston, Timothy J., Reston, T.J., Leythaeuser, T., Reston, Timothy, Minshull, T.A., Minshull, T. A., Leythaeuser, T   +7 more
core   +1 more source

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, A. Płonka, Seismology, NWO-VIDI: Full waveform inversion for upper-mantle density structure, Plonka, A.I., Blom, N.A., Fichtner, A., N. Blom   +7 more
core   +2 more sources

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.
Butzer, Simone
core   +1 more source

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, Jiaqi Zhang, Jianqiang Sun, Xueyuan Huang, Yanjie Zhou   +4 more
doaj   +1 more source

Imaging disturbance zones ahead of a tunnel by elastic full-waveform inversion: Adjoint gradient based inversion vs. parameter space reduction using a level-set method

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, Luan T. Nguyen, Wolfgang Friederich, Tamara Nestorović   +3 more
doaj   +1 more source

Seismic Characterization of the Blue Mountain Geothermal Field

Energies, 2023
Subsurface characterization is crucial for geothermal energy exploration and production. Yet hydrothermal reservoirs usually reside in highly fractured and faulted zones where accurate characterization is very challenging because of low signal-to-noise ...
Kai Gao, Lianjie Huang, Trenton Cladouhos   +2 more
doaj   +1 more source

Strategies for elastic full waveform inversion

, 2020
The advent of modern supercomputers, in conjunction with larger, more comprehensive datasets, has led to a paradigm shift in seismic imaging. Full waveform inversion is routinely employed as a tool to estimate subsurface properties of the Earth with ...
Matharu, Gian
core   +1 more source

Reflection Full Waveform Inversion with Decoupled Elastic-wave Equations in Inhomogeneous Medium [PDF]

, 2021
Reflection full-waveform inversion (RFWI) can reduce the nonlinearity of inversion providing an accurate initial velocity model for full-waveform inversion (FWI) through the tomographic components (low-wavenumber).
Liang, Zhanyuan, Wu, Guochen, Li, Qingyang, Zhang, Xiaoyu   +3 more
core   +1 more source