Results 261 to 270 of about 3,292,250 (298)

Full Waveform Inversion in Viscoelastic Media

2021
Accumulations of gas hydrates in the bottom layers pose not only a potential threat to offshore engineering structures and shipping. They can also cause the release of significant volumes of methane into the atmosphere. The most natural way to detect gas hydrates is to use seismic methods.
Vladimir A. Cheverda, Ekaterina Efimova, Galina V. Reshetova   +2 more
openaire   +1 more source

Source-domain full-waveform inversions

Geophysics, 2019
ABSTRACT Conventional full-waveform inversion (FWI) updates a velocity model by minimizing the data residuals between the predicted and observed data at the receiver positions. We have developed a new FWI to update the velocity model by minimizing virtual source artifacts at the receiver positions in the source-domain FWI (SFWI ...
Yulang Wu, George A. McMechan
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

Adjustive full waveform inversion

International Meeting for Applied Geoscience & Energy, 2015
Summary One fundamental challenge of full waveform inversion(FWI) is the local minimum issue caused by the cycle skipping between the predicted and acquired data. To overcome this challenge and achieve a successful inversion, a good initial model becomes a necessary ingredient of FWI.
Kun Jiao*, Dong Sun, Xin Cheng, Denes Vigh   +3 more
openaire   +1 more source

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.
openaire   +1 more source

Full waveform inversion using Random Mixing

Computers & Geosciences, 2022
Most deterministic full waveform inversion (FWI) approaches require an initial model, which serves as a starting point for the inversion. Determining such an initial model, however, is not straight forward. In this paper, a geostatistical inversion approach called Random Mixing (RM) for FWI is presented.
Ao Chang, Lutz Gross, Sebastian Hörning
openaire   +5 more sources

Decentralized Full-Waveform Inversion

Proceedings, 2018
With the advent of efficient seismic data acquisition, we are having a surplus of seismic data, which is improving the imaging of the earth using full-waveform inversion. However, such inversion suffers from many issues, including (i) substantial network waiting time due to repeated communications of function and gradient values in the distributed ...
Kadu, A.A., Kumar, Rajiv
openaire   +2 more sources

An introduction to full waveform inversion

2014
Abstract Full waveform inversion (FWI) is a high-resolution seismic imaging technique that is based on using the entire content of seismic traces for extracting physical parameters of the medium sampled by seismic waves. The wide-spread strategy of seismic imaging, the single scattering formulation, at the core of FWI, assumes no ...
Virieux, Jean, Asnaashari, Amir, Brossier, Romain, Métivier, Ludovic, Ribodetti, Alessandra, Zhou, Wei   +5 more
openaire   +2 more sources

Optimal Matching Full Waveform Inversion

IEEE Transactions on Geoscience and Remote Sensing, 2023
Weiguang He, Guanghui Hu, Bing Zhang
openaire   +1 more source

Genetic Full Waveform Inversion to Characterise Fractures

81st EAGE Conference and Exhibition 2019, 2019
Understanding the physical properties of fractures, location, orientation, and geometry is of primary importance in the comprehension of geo-resources and geo-hazards. In doing so seismic waves can be an effective tool for non-invasive investigation of fracture parameters.
Fuggi, A, Hildyard, M, Hooper, A, Clark, R, Brittan, J   +4 more
openaire   +2 more sources