A cross-correlation objective function for least-squares migration and visco-acoustic imaging

Handle URI:
http://hdl.handle.net/10754/593350
Title:
A cross-correlation objective function for least-squares migration and visco-acoustic imaging
Authors:
Dutta, Gaurav ( 0000-0002-2024-1683 ) ; Sinha, Mrinal ( 0000-0002-4992-1084 ) ; Schuster, Gerard T. ( 0000-0001-7532-1587 )
Abstract:
Conventional acoustic least-squares migration inverts for a reflectivity image that best matches the amplitudes of the observed data. However, for field data applications, it is not easy to match the recorded amplitudes because of the visco-elastic nature of the earth and inaccuracies in the estimation of source signature and strength at different shot locations. To relax the requirement for strong amplitude matching of least-squares migration, we use a normalized cross-correlation objective function that is only sensitive to the similarity between the predicted and the observed data. Such a normalized cross-correlation objective function is also equivalent to a time-domain phase inversion method where the main emphasis is only on matching the phase of the data rather than the amplitude. Numerical tests on synthetic and field data show that such an objective function can be used as an alternative to visco-acoustic least-squares reverse time migration (Qp-LSRTM) when there is strong attenuation in the subsurface and the estimation of the attenuation parameter Qp is insufficiently accurate.
KAUST Department:
Earth Science and Engineering Program; Physical Sciences and Engineering (PSE) Division
Citation:
Gaurav Dutta, Mrinal Sinha*, and Gerard T. Schuster (2014) A cross-correlation objective function for least-squares migration and visco-acoustic imaging. SEG Technical Program Expanded Abstracts 2014: pp. 3985-3990. doi: 10.1190/segam2014-1376.1
Publisher:
Society of Exploration Geophysicists
Journal:
SEG Technical Program Expanded Abstracts 2014
Issue Date:
5-Aug-2014
DOI:
10.1190/segam2014-1376.1
Type:
Article
Additional Links:
http://library.seg.org/doi/abs/10.1190/segam2014-1376.1
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorDutta, Gauraven
dc.contributor.authorSinha, Mrinalen
dc.contributor.authorSchuster, Gerard T.en
dc.date.accessioned2016-01-13T09:59:05Zen
dc.date.available2016-01-13T09:59:05Zen
dc.date.issued2014-08-05en
dc.identifier.citationGaurav Dutta, Mrinal Sinha*, and Gerard T. Schuster (2014) A cross-correlation objective function for least-squares migration and visco-acoustic imaging. SEG Technical Program Expanded Abstracts 2014: pp. 3985-3990. doi: 10.1190/segam2014-1376.1en
dc.identifier.doi10.1190/segam2014-1376.1en
dc.identifier.urihttp://hdl.handle.net/10754/593350en
dc.description.abstractConventional acoustic least-squares migration inverts for a reflectivity image that best matches the amplitudes of the observed data. However, for field data applications, it is not easy to match the recorded amplitudes because of the visco-elastic nature of the earth and inaccuracies in the estimation of source signature and strength at different shot locations. To relax the requirement for strong amplitude matching of least-squares migration, we use a normalized cross-correlation objective function that is only sensitive to the similarity between the predicted and the observed data. Such a normalized cross-correlation objective function is also equivalent to a time-domain phase inversion method where the main emphasis is only on matching the phase of the data rather than the amplitude. Numerical tests on synthetic and field data show that such an objective function can be used as an alternative to visco-acoustic least-squares reverse time migration (Qp-LSRTM) when there is strong attenuation in the subsurface and the estimation of the attenuation parameter Qp is insufficiently accurate.en
dc.language.isoenen
dc.publisherSociety of Exploration Geophysicistsen
dc.relation.urlhttp://library.seg.org/doi/abs/10.1190/segam2014-1376.1en
dc.rightsArchived with thanks to SEG Technical Program Expanded Abstracts 2014en
dc.subjectattenuationen
dc.subjectleast squaresen
dc.subjectmigrationen
dc.subjectQen
dc.subjectreverse-timeen
dc.titleA cross-correlation objective function for least-squares migration and visco-acoustic imagingen
dc.typeArticleen
dc.contributor.departmentEarth Science and Engineering Programen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalSEG Technical Program Expanded Abstracts 2014en
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorDutta, Gauraven
kaust.authorSinha, Mrinalen
kaust.authorSchuster, Gerard T.en
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