Effective Elliptic Models for Efficient Wavefield Extrapolation in Anisotropic Media

Handle URI:
http://hdl.handle.net/10754/333063
Title:
Effective Elliptic Models for Efficient Wavefield Extrapolation in Anisotropic Media
Authors:
Waheed, Umair bin ( 0000-0002-5189-0694 ) ; Alkhalifah, Tariq Ali ( 0000-0002-9363-9799 )
Abstract:
Wavefield extrapolation operator for elliptically anisotropic media offers significant cost reduction compared to that of transversely isotropic media (TI), especially when the medium exhibits tilt in the symmetry axis (TTI). However, elliptical anisotropy does not provide accurate focusing for TI media. Therefore, we develop effective elliptically anisotropic models that correctly capture the kinematic behavior of the TTI wavefield. Specifically, we use an iterative elliptically anisotropic eikonal solver that provides the accurate traveltimes for a TI model. The resultant coefficients of the elliptical eikonal provide the effective models. These effective models allow us to use the cheaper wavefield extrapolation operator for elliptic media to obtain approximate wavefield solutions for TTI media. Despite the fact that the effective elliptic models are obtained by kinematic matching using high-frequency asymptotic, the resulting wavefield contains most of the critical wavefield components, including the frequency dependency and caustics, if present, with reasonable accuracy. The methodology developed here offers a much better cost versus accuracy tradeoff for wavefield computations in TTI media, considering the cost prohibitive nature of the problem. We demonstrate the applicability of the proposed approach on the BP TTI model.
KAUST Department:
King Abdullah University of Science & Technology
Publisher:
European Association of Geoscientists & Engineers
Journal:
76th EAGE Conference & Exhibition, Expanded Abstracts
Conference/Event name:
76th EAGE Conference & Exhibition 2014
Issue Date:
May-2014
DOI:
10.3997/2214-4609.20140813
Type:
Conference Paper
Appears in Collections:
Conference Papers

Full metadata record

DC FieldValue Language
dc.contributor.authorWaheed, Umair binen
dc.contributor.authorAlkhalifah, Tariq Alien
dc.date.accessioned2014-10-22T06:28:54Z-
dc.date.available2014-10-22T06:28:54Z-
dc.date.issued2014-05en
dc.identifier.doi10.3997/2214-4609.20140813en
dc.identifier.urihttp://hdl.handle.net/10754/333063en
dc.description.abstractWavefield extrapolation operator for elliptically anisotropic media offers significant cost reduction compared to that of transversely isotropic media (TI), especially when the medium exhibits tilt in the symmetry axis (TTI). However, elliptical anisotropy does not provide accurate focusing for TI media. Therefore, we develop effective elliptically anisotropic models that correctly capture the kinematic behavior of the TTI wavefield. Specifically, we use an iterative elliptically anisotropic eikonal solver that provides the accurate traveltimes for a TI model. The resultant coefficients of the elliptical eikonal provide the effective models. These effective models allow us to use the cheaper wavefield extrapolation operator for elliptic media to obtain approximate wavefield solutions for TTI media. Despite the fact that the effective elliptic models are obtained by kinematic matching using high-frequency asymptotic, the resulting wavefield contains most of the critical wavefield components, including the frequency dependency and caustics, if present, with reasonable accuracy. The methodology developed here offers a much better cost versus accuracy tradeoff for wavefield computations in TTI media, considering the cost prohibitive nature of the problem. We demonstrate the applicability of the proposed approach on the BP TTI model.en
dc.language.isoenen
dc.publisherEuropean Association of Geoscientists & Engineersen
dc.subjectanisotropyen
dc.subjectanisotropic wavefield extrapolationen
dc.titleEffective Elliptic Models for Efficient Wavefield Extrapolation in Anisotropic Mediaen
dc.typeConference Paperen
dc.contributor.departmentKing Abdullah University of Science & Technologyen
dc.identifier.journal76th EAGE Conference & Exhibition, Expanded Abstractsen
dc.conference.date16–19 June 2014en
dc.conference.name76th EAGE Conference & Exhibition 2014en
dc.conference.locationAmsterdam, Netherlandsen
dc.eprint.versionPre-printen
kaust.authorWaheed, Umair binen
kaust.authorAlkhalifah, Tariq Alien
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.