Results 251 to 260 of about 40,315 (288)

Viscoacoustic anisotropic full waveform inversion

Journal of Applied Geophysics, 2017
Abstract A viscoacoustic vertical transverse isotropic (VTI) quasi-differential wave equation, which takes account for both the viscosity and anisotropy of media, is proposed for wavefield simulation in this study. The finite difference method is used to solve the equations, for which the attenuation terms are solved in the wavenumber domain, and all
Yingming Qu, Zhenchun Li, Jianping Huang, Jinli Li   +3 more
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Visco-acoustic Full Waveform Inversion

78th EAGE Conference and Exhibition 2016, 2016
Acoustic full waveform inversion is nowadays an established technology to determine velocity background images from low-frequency and long-offset data sets with a focus on the diving waves. The depth of investigation can vary from a few hundred meters to a few kilometres.
R.E. Plessix, A. Stopin, H. Kuehl, V. Goh, K. Overgaag   +4 more
openaire   +1 more source

Elastic 3D full-waveform inversion

SEG Technical Program Expanded Abstracts 2012, 2012
s, U038. © 2012 SEG DOI http://dx.doi.org/10.1190/segam2012-1239.1 SEG Las Vegas 2012 Annual Meeting Page 5 This article has been cited by: 1. Joanna Morgan, Michael Warner, Gillean Arnoux, Emilie Hooft, Douglas Toomey, Brandon VanderBeek, William Wilcock. 2016.
Lluís Guasch, Mike Warner, Tenice Nangoo, Jo Morgan, Adrian Umpleby, Ivan Stekl, Nikhil Shah   +6 more
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Anisotropic 3D full-waveform inversion

GEOPHYSICS, 2013
We have developed and implemented a robust and practical scheme for anisotropic 3D acoustic full-waveform inversion (FWI). We demonstrate this scheme on a field data set, applying it to a 4C ocean-bottom survey over the Tommeliten Alpha field in the North Sea.
Michael Warner, Andrew Ratcliffe, Tenice Nangoo, Joanna Morgan, Adrian Umpleby, Nikhil Shah, Vetle Vinje, Ivan Štekl, Lluís Guasch, Caroline Win, Graham Conroy, Alexandre Bertrand   +11 more
openaire   +1 more source

Resolution Analysis in Full Waveform Inversion

Geophysical Journal International, 2011
We propose a new method for the quantitative resolution analysis in full seismic waveform inversion that overcomes the limitations of classical synthetic inversions while being computationally more efficient and applicable to any misfit measure. The method rests on (1) the local quadratic approximation of the misfit functional in the vicinity of an ...
Fichtner, A., Trampert, J.
openaire   +3 more sources

Full Waveform Inversion

2015
Inferring interior properties of the Sun from photospheric measurements of the seismic wavefield constitutes the helioseismic inverse problem. Deviations in seismic measurements (such as wave travel times) from their fiducial values estimated for a given model of the solar interior imply that the model is inaccurate.
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3D Variational Full-Waveform Inversion

2022
<p>Seismic full-waveform inversion (FWI) produces high resolution images of the subsurface by exploiting information in full seismic waveforms, and has been applied at global, regional and industrial spatial scales. FWI is traditionally solved by using optimization, in which one seeks a best model by minimizing the misfit between observed
Xin Zhang, Muhong Zhou, Angus Lomas, York Zheng, Andrew Curtis   +4 more
openaire   +1 more source

Matching Pursuit Full Waveform Inversion

Proceedings, 2015
One fundamental challenge of FWI is the local minimum issue caused by the cycle skipping between the predicted and acquired data. In order to overcome this challenge and achieve a successful inversion, a good initial model becomes a must-have ingredient of FWI. In another word, the background model has to be accurate enough to start FWI.
K. Jiao, D. Sun, X. Cheng, D. Vigh
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Elastic Reflection Full Waveform Inversion

Proceedings, 2018
Reflection full waveform inversion is a formulation of full waveform inversion designed to extract low wavenumber velocity information from the reflected wavefield. In this works we extend reflection full waveform inversion to an elastic framework. This allows the estimation of both P-wave and S-wave velocities using reflected waveforms.
W. Weibull, F. Ebrahim
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Joint Domain Full Waveform Inversion

84th EAGE Annual Conference & Exhibition, 2023
L. Duan, Y. Zhang, F. Chen, W. Han, Z. Zhou, Q. Song   +5 more
openaire   +1 more source