Angle-domain Migration Velocity Analysis using Wave-equation Reflection Traveltime Inversion

Handle URI:
http://hdl.handle.net/10754/593675
Title:
Angle-domain Migration Velocity Analysis using Wave-equation Reflection Traveltime Inversion
Authors:
Zhang, Sanzong; Schuster, Gerard T. ( 0000-0001-7532-1587 ) ; Luo, Yi
Abstract:
The main difficulty with an iterative waveform inversion is that it tends to get stuck in a local minima associated with the waveform misfit function. This is because the waveform misfit function is highly non-linear with respect to changes in the velocity model. To reduce this nonlinearity, we present a reflection traveltime tomography method based on the wave equation which enjoys a more quasi-linear relationship between the model and the data. A local crosscorrelation of the windowed downgoing direct wave and the upgoing reflection wave at the image point yields the lag time that maximizes the correlation. This lag time represents the reflection traveltime residual that is back-projected into the earth model to update the velocity in the same way as wave-equation transmission traveltime inversion. The residual movemout analysis in the angle-domain common image gathers provides a robust estimate of the depth residual which is converted to the reflection traveltime residual for the velocity inversion. We present numerical examples to demonstrate its efficiency in inverting seismic data for complex velocity model.
KAUST Department:
Earth Science and Engineering Program; Physical Sciences and Engineering (PSE) Division
Publisher:
Society of Exploration Geophysicists
Journal:
SEG Technical Program Expanded Abstracts 2012
Conference/Event name:
SEG Technical Program Expanded Abstracts 2012
Issue Date:
4-Nov-2012
DOI:
10.1190/segam2012-1123.1
Type:
Conference Paper
Additional Links:
http://library.seg.org/doi/abs/10.1190/segam2012-1123.1
Appears in Collections:
Conference Papers; Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorZhang, Sanzongen
dc.contributor.authorSchuster, Gerard T.en
dc.contributor.authorLuo, Yien
dc.date.accessioned2016-01-18T07:51:07Zen
dc.date.available2016-01-18T07:51:07Zen
dc.date.issued2012-11-04en
dc.identifier.doi10.1190/segam2012-1123.1en
dc.identifier.urihttp://hdl.handle.net/10754/593675en
dc.description.abstractThe main difficulty with an iterative waveform inversion is that it tends to get stuck in a local minima associated with the waveform misfit function. This is because the waveform misfit function is highly non-linear with respect to changes in the velocity model. To reduce this nonlinearity, we present a reflection traveltime tomography method based on the wave equation which enjoys a more quasi-linear relationship between the model and the data. A local crosscorrelation of the windowed downgoing direct wave and the upgoing reflection wave at the image point yields the lag time that maximizes the correlation. This lag time represents the reflection traveltime residual that is back-projected into the earth model to update the velocity in the same way as wave-equation transmission traveltime inversion. The residual movemout analysis in the angle-domain common image gathers provides a robust estimate of the depth residual which is converted to the reflection traveltime residual for the velocity inversion. We present numerical examples to demonstrate its efficiency in inverting seismic data for complex velocity model.en
dc.publisherSociety of Exploration Geophysicistsen
dc.relation.urlhttp://library.seg.org/doi/abs/10.1190/segam2012-1123.1en
dc.subjectmigrationen
dc.subjectvelocityen
dc.subjectfull waveform inversionen
dc.subjectreverse-timeen
dc.titleAngle-domain Migration Velocity Analysis using Wave-equation Reflection Traveltime Inversionen
dc.typeConference Paperen
dc.contributor.departmentEarth Science and Engineering Programen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalSEG Technical Program Expanded Abstracts 2012en
dc.conference.dateNovember 4-9, 2012en
dc.conference.nameSEG Technical Program Expanded Abstracts 2012en
dc.conference.locationLas Vegas, Nevadaen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionSaudi Aramcoen
kaust.authorSchuster, Gerard T.en
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