Efficient anisotropic wavefield extrapolation using effective isotropic models

Handle URI:
http://hdl.handle.net/10754/577106
Title:
Efficient anisotropic wavefield extrapolation using effective isotropic models
Authors:
Alkhalifah, Tariq Ali ( 0000-0002-9363-9799 ) ; Ma, X.; Waheed, Umair bin ( 0000-0002-5189-0694 ) ; Zuberi, M.
Abstract:
Isotropic wavefield extrapolation is more efficient than anisotropic extrapolation, and this is especially true when the anisotropy of the medium is tilted (from the vertical). We use the kinematics of the wavefield, appropriately represented in the high-frequency asymptotic approximation by the eikonal equation, to develop effective isotropic models, which are used to efficiently and approximately extrapolate anisotropic wavefields using the isotropic, relatively cheaper, operators. These effective velocity models are source dependent and tend to embed the anisotropy in the inhomogeneity. Though this isotropically generated wavefield theoretically shares the same kinematic behavior as that of the first arrival anisotropic wavefield, it also has the ability to include all the arrivals resulting from a complex wavefield propagation. In fact, the effective models reduce to the original isotropic model in the limit of isotropy, and thus, the difference between the effective model and, for example, the vertical velocity depends on the strength of anisotropy. For reverse time migration (RTM), effective models are developed for the source and receiver fields by computing the traveltime for a plane wave source stretching along our source and receiver lines in a delayed shot migration implementation. Applications to the BP TTI model demonstrates the effectiveness of the approach.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Environmental Science and Engineering Program
Publisher:
EAGE Publications
Journal:
London 2013, 75th eage conference en exhibition incorporating SPE Europec
Issue Date:
10-Jun-2013
DOI:
10.3997/2214-4609.20130359
Type:
Conference Paper
ISBN:
9781629937915
Appears in Collections:
Conference Papers; Environmental Science and Engineering Program; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorAlkhalifah, Tariq Alien
dc.contributor.authorMa, X.en
dc.contributor.authorWaheed, Umair binen
dc.contributor.authorZuberi, M.en
dc.date.accessioned2015-09-10T14:18:23Zen
dc.date.available2015-09-10T14:18:23Zen
dc.date.issued2013-06-10en
dc.identifier.isbn9781629937915en
dc.identifier.doi10.3997/2214-4609.20130359en
dc.identifier.urihttp://hdl.handle.net/10754/577106en
dc.description.abstractIsotropic wavefield extrapolation is more efficient than anisotropic extrapolation, and this is especially true when the anisotropy of the medium is tilted (from the vertical). We use the kinematics of the wavefield, appropriately represented in the high-frequency asymptotic approximation by the eikonal equation, to develop effective isotropic models, which are used to efficiently and approximately extrapolate anisotropic wavefields using the isotropic, relatively cheaper, operators. These effective velocity models are source dependent and tend to embed the anisotropy in the inhomogeneity. Though this isotropically generated wavefield theoretically shares the same kinematic behavior as that of the first arrival anisotropic wavefield, it also has the ability to include all the arrivals resulting from a complex wavefield propagation. In fact, the effective models reduce to the original isotropic model in the limit of isotropy, and thus, the difference between the effective model and, for example, the vertical velocity depends on the strength of anisotropy. For reverse time migration (RTM), effective models are developed for the source and receiver fields by computing the traveltime for a plane wave source stretching along our source and receiver lines in a delayed shot migration implementation. Applications to the BP TTI model demonstrates the effectiveness of the approach.en
dc.publisherEAGE Publicationsen
dc.titleEfficient anisotropic wavefield extrapolation using effective isotropic modelsen
dc.typeConference Paperen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentEnvironmental Science and Engineering Programen
dc.identifier.journalLondon 2013, 75th eage conference en exhibition incorporating SPE Europecen
kaust.authorAlkhalifah, Tariq Alien
kaust.authorMa, X.en
kaust.authorWaheed, Umair binen
kaust.authorZuberi, M.en
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