On the parameterization of seismic anisotropy in elastic waveform inversion - The HTI case

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985530%3A_____%2F17%3A00488259" target="_blank" >RIV/67985530:_____/17:00488259 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.3997/2214-4609.201701227" target="_blank" >http://dx.doi.org/10.3997/2214-4609.201701227</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3997/2214-4609.201701227" target="_blank" >10.3997/2214-4609.201701227</a>

Result language

angličtina

Original language name

On the parameterization of seismic anisotropy in elastic waveform inversion - The HTI case

Original language description

The full waveform inversion (FWI) problem can generally be reduced to a sequence of linear inversenproblems by using local optimization methods (Lee et al., 2010) or direct iterative inversion methodsn(Jakobsen and Ursin, 2015). However, each linearized inversion step is generally ill-posed, in the sensenthat some kind of regularization is generally required to find a stable and unique solution in the presence of model errors and noise. FWI in acoustic and elastic (isotropic or anisotropic) media share many common challenges, but the computational cost will obviously be larger in the anisotropic case than in the acoustic case. Also, there are often significant problems with cross-talk between the multiple model parameters that one needs to reconstruct in the anisotropic case (Lee et al., 2010). The problem with cross-talk can be potentially reduced by a reparameterization of the forward model (Lee et al., 2010 and Kamath and Tsvankin, 2015) by, for example, use of a more appropriate anisotropy parameterization. In this study, we have compared parameterization by elastic stiffness tensor in the Voigt notation and weak-anisotropy (WA) parameters in transversely isotropic media with a horizontal symmetry axis (HTI media). We used the Gassmann-consistent effective medium theory of fractured porous media introduced by Jakobsen and Pilskog (2016) to generate realistic stiffness and WA parameters models. We then performed a series of numerical inversion experiments, based on the ray-Born approximation, to investigate how accurately one can potentially recover the unknown model parameters using the two different parameterizations.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

—

OECD FORD branch

10507 - Volcanology

Project

<a href="/en/project/GA16-05237S" target="_blank" >GA16-05237S: Seismic waves in inhomogeneous weakly anisotropic media</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

Energy, technology, sustainability - time to open a new chapter. 79th EAGE Conference and Exhibition 2017

ISBN

978-1-5108-4353-0

ISSN

—

e-ISSN

—

Number of pages

4

Pages from-to

—

Publisher name

Curran Associates

Place of publication

Red Hook

Event location

Paris

Event date

Jun 12, 2017

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

—