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dc.contributor.author
Huang, Xingguo
dc.contributor.author
Greenhalgh, Stewart
dc.contributor.author
Han, Li
dc.contributor.author
Liu, Xu
dc.date.accessioned
2022-06-27T07:48:15Z
dc.date.available
2022-04-10T05:50:22Z
dc.date.available
2022-06-27T07:48:15Z
dc.date.issued
2022-03
dc.identifier.issn
2169-9313
dc.identifier.issn
0148-0227
dc.identifier.issn
2169-9356
dc.identifier.other
10.1029/2021JB023590
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/541793
dc.description.abstract
The interior of the Earth is quite complex due to the actual geometrical structure and the presence of complex rheological materials, including viscoelastic rocks, porous sediments and the presence of anisotropy. Seismic wavefield forward modeling in such media forms the basis of most wave equation-based methods for investigating the structure of the Earth and processing and imaging of seismic data, e.g., seismic full waveform inversion. Numerical modeling using Biot's equations that describe the physics of poroelasticity provides a useful framework to investigate wave attenuation and dispersion. Poroelasticity describes the interaction between the deformation of an elastic porous solid and the fluid flow in the porous structure. We present a time-domain finite-difference method for seismic wavefield modeling, taking into account both attenuation and anisotropy of poroviscoelastic Earth structure. The mathematical formulations and modeling methods are based on (a) the linear Biot's poroelastic theory and double porosity models in anisotropic media and (b) a relaxation function that uses the generalized standard linear solid model with anisotropic τ parameter for magnitude of attenuation and nearly constant Q model. Using a modified relaxation function that is suggested to describe the anisotropy attenuation, we develop a generalized anisotropic Biot model in the anisotropic, viscoelastic media. In addition to the anisotropic poroelasticity based on Biot theory, we implement the generalized anisotropic Biot model with complex moduli for an effective Biot's model in which the attenuative anisotropic viscoelastic model with the generalized standard linear solid model is used to approximate the attenuation factor function. The method generalizes the linear poroviscoelastic model based on effective Biot theory for seismic wave modeling to the attenuative, anisotropic case. In the anisotropic, poroviscoelastic model, we represent the bulk modulus and shear modulus of the solid frame by the modified relaxation function. We present time-domain finite-difference modeling for seismic wavefields in anisotropic, viscoelastic porous media including transversely isotropic media with a vertical, tilted or horizontal symmetry axis (VTI, TTI, and HTI). We also consider the extension of the two new models to nearly constant Q viscoelastic anisotropy.
en_US
dc.language.iso
en
en_US
dc.publisher
American Geophysical Union
en_US
dc.title
Generalized Effective Biot Theory and Seismic Wave Propagation in Anisotropic, Poroviscoelastic Media
en_US
dc.type
Journal Article
dc.date.published
2022-02-17
ethz.journal.title
Journal of Geophysical Research: Solid Earth
ethz.journal.volume
127
en_US
ethz.journal.issue
3
en_US
ethz.journal.abbreviated
J. geophys. res. Solid earth
ethz.pages.start
e2021JB023590
en_US
ethz.size
25 p.
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Washington, DC
en_US
ethz.publication.status
published
en_US
ethz.date.deposited
2022-04-10T05:50:36Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2022-06-27T07:48:21Z
ethz.rosetta.lastUpdated
2022-06-27T07:48:21Z
ethz.rosetta.versionExported
true
ethz.COinS
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