Wavefield extrapolation in pseudo-depth domain

Handle URI:
http://hdl.handle.net/10754/575763
Title:
Wavefield extrapolation in pseudo-depth domain
Authors:
Ma, Xuxin; Alkhalifah, Tariq Ali ( 0000-0002-9363-9799 )
Abstract:
Extrapolating seismic waves in Cartesian coordinate is prone to uneven spatial sampling, because the seismic wavelength tends to grow with depth, as velocity increase. We transform the vertical depth axis to a pseudo one using a velocity weighted mapping, which can effectively mitigate this wavelength variation. We derive acoustic wave equations in this new domain based on the direct transformation of the Laplacian derivatives, which admits solutions that are more accurate and stable than those derived from the kinematic transformation. The anisotropic versions of these equations allow us to isolate the vertical velocity influence and reduce its impact on modeling and imaging. The major benefit of extrapolating wavefields in pseudo-depth space is its near uniform wavelength as opposed to the normally dramatic change of wavelength with the conventional approach. Time wavefield extrapolation on a complex velocity shows some of the features of this approach.
KAUST Department:
Earth Sciences and Engineering Program; Physical Sciences and Engineering (PSE) Division; Environmental Science and Engineering Program; Earth Science and Engineering Program
Publisher:
EAGE Publications
Journal:
74th EAGE Conference and Exhibition incorporating EUROPEC 2012
Conference/Event name:
74th EAGE Conference and Exhibition incorporating EUROPEC 2012
Issue Date:
2012
DOI:
10.3997/2214-4609.20148574
Type:
Conference Paper
ISBN:
9781629937908; 9781617829666
Appears in Collections:
Conference Papers; Environmental Science and Engineering Program; Environmental Science and Engineering Program; Physical Sciences and Engineering (PSE) Division; Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program; Earth Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorMa, Xuxinen
dc.contributor.authorAlkhalifah, Tariq Alien
dc.date.accessioned2015-08-24T09:25:32Zen
dc.date.available2015-08-24T09:25:32Zen
dc.date.issued2012en
dc.identifier.isbn9781629937908en
dc.identifier.isbn9781617829666en
dc.identifier.doi10.3997/2214-4609.20148574en
dc.identifier.urihttp://hdl.handle.net/10754/575763en
dc.description.abstractExtrapolating seismic waves in Cartesian coordinate is prone to uneven spatial sampling, because the seismic wavelength tends to grow with depth, as velocity increase. We transform the vertical depth axis to a pseudo one using a velocity weighted mapping, which can effectively mitigate this wavelength variation. We derive acoustic wave equations in this new domain based on the direct transformation of the Laplacian derivatives, which admits solutions that are more accurate and stable than those derived from the kinematic transformation. The anisotropic versions of these equations allow us to isolate the vertical velocity influence and reduce its impact on modeling and imaging. The major benefit of extrapolating wavefields in pseudo-depth space is its near uniform wavelength as opposed to the normally dramatic change of wavelength with the conventional approach. Time wavefield extrapolation on a complex velocity shows some of the features of this approach.en
dc.publisherEAGE Publicationsen
dc.titleWavefield extrapolation in pseudo-depth domainen
dc.typeConference Paperen
dc.contributor.departmentEarth Sciences and Engineering Programen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentEnvironmental Science and Engineering Programen
dc.contributor.departmentEarth Science and Engineering Programen
dc.identifier.journal74th EAGE Conference and Exhibition incorporating EUROPEC 2012en
dc.conference.date4-7 June 2012en
dc.conference.name74th EAGE Conference and Exhibition incorporating EUROPEC 2012en
dc.conference.locationCopenhagen, Denmarken
kaust.authorMa, Xuxinen
kaust.authorAlkhalifah, Tariq Alien
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