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Target-Oriented Elastic Full-Waveform Inversion.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Target-Oriented Elastic Full-Waveform Inversion./
Author:	Biondi, Ettore.
Published:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
Description:	135 p.
Notes:	Source: Dissertations Abstracts International, Volume: 82-08, Section: B.
Contained By:	Dissertations Abstracts International82-08B.
Subject:	Geophysics. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28392138
ISBN:	9798569985418

Target-Oriented Elastic Full-Waveform Inversion.
Biondi, Ettore.

Target-Oriented Elastic Full-Waveform Inversion. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 135 p.

Source: Dissertations Abstracts International, Volume: 82-08, Section: B.

Thesis (Ph.D.)--Stanford University, 2021.

This item must not be sold to any third party vendors.

Wave-equation-based parameter estimation techniques can retrieve accurate and high-resolution subsurface physical properties from seismic data acquired close to the surface of the Earth. In fact, multiple acoustic full-waveform inversion methods have been proposed over the years to retrieve the P-wave velocity of the subsurface. Moreover, researchers have extended full-waveform inversion approaches to estimate anisotropic and absorption parameters as well. Nowadays, some applications of elastic full-waveform inversion can also be found. However, given its prohibitive computational cost compared to the acoustic counterpart, elastic wave-equation inversion workflows still have limited applicability within seismic exploration datasets. To tackle this challenge, I propose a novel wave-equation-based elastic parameter estimation workflow based on wave-equation operators. I refer to the entire approach as target-oriented elastic full-waveform inversion. The method is composed of two steps. In the first one, I apply an extended linearized waveform inversion to the surface data. The obtained subsurface image is then employed to synthesize data as if they were acquired close to a target area. Finally, this dataset is inverted using an elastic full-waveform inversion workflow to estimate the subsurface elastic parameters. I demonstrate its efficacy on a 2D synthetic test and an ocean-bottom-node dataset acquired in the Gulf of Mexico, showing its ability to retrieve the elastic parameters of potential subsurface prospects. Compared to the elastic inversion of the surface dataset, the proposed method has a computational cost lower by two orders of magnitude.

ISBN: 9798569985418Subjects--Topical Terms:

535228
Geophysics.
Subjects--Index Terms:

Full-waveform

Target-Oriented Elastic Full-Waveform Inversion.
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006 m o d
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020 $a 9798569985418
035 $a (MiAaPQ)AAI28392138
035 $a (MiAaPQ)STANFORDzs076hc8844
035 $a AAI28392138
040 $a MiAaPQ $c MiAaPQ
100 1 $a Biondi, Ettore. $3 3685465
245 1 0 $a Target-Oriented Elastic Full-Waveform Inversion.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2021
300 $a 135 p.
500 $a Source: Dissertations Abstracts International, Volume: 82-08, Section: B.
500 $a Advisor: Biondi, Biondo;Dunham, Eric; Zebker, Howard A.
502 $a Thesis (Ph.D.)--Stanford University, 2021.
506 $a This item must not be sold to any third party vendors.
520 $a Wave-equation-based parameter estimation techniques can retrieve accurate and high-resolution subsurface physical properties from seismic data acquired close to the surface of the Earth. In fact, multiple acoustic full-waveform inversion methods have been proposed over the years to retrieve the P-wave velocity of the subsurface. Moreover, researchers have extended full-waveform inversion approaches to estimate anisotropic and absorption parameters as well. Nowadays, some applications of elastic full-waveform inversion can also be found. However, given its prohibitive computational cost compared to the acoustic counterpart, elastic wave-equation inversion workflows still have limited applicability within seismic exploration datasets. To tackle this challenge, I propose a novel wave-equation-based elastic parameter estimation workflow based on wave-equation operators. I refer to the entire approach as target-oriented elastic full-waveform inversion. The method is composed of two steps. In the first one, I apply an extended linearized waveform inversion to the surface data. The obtained subsurface image is then employed to synthesize data as if they were acquired close to a target area. Finally, this dataset is inverted using an elastic full-waveform inversion workflow to estimate the subsurface elastic parameters. I demonstrate its efficacy on a 2D synthetic test and an ocean-bottom-node dataset acquired in the Gulf of Mexico, showing its ability to retrieve the elastic parameters of potential subsurface prospects. Compared to the elastic inversion of the surface dataset, the proposed method has a computational cost lower by two orders of magnitude.
590 $a School code: 0212.
650 4 $a Geophysics. $3 535228
650 4 $a Physics. $3 516296
653 $a Full-waveform
653 $a Wave-equation-based parameter
653 $a P-wave
690 $a 0605
690 $a 0373
710 2 $a Stanford University. $3 754827
773 0 $t Dissertations Abstracts International $g 82-08B.
790 $a 0212
791 $a Ph.D.
792 $a 2021
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28392138