Frequency-wavenumber domain phase inversion along reflection wavepaths

Handle URI:
http://hdl.handle.net/10754/563884
Title:
Frequency-wavenumber domain phase inversion along reflection wavepaths
Authors:
Yu, Han; Huang, Yunsong
Abstract:
A background velocity model containing the correct low-wavenumber information is desired for both the quality of the migration image and the success of waveform inversion. To achieve this goal, the velocity is updated along the reflection wavepaths, rather than along both the reflection ellipses and transmission wavepaths as in conventional FWI. This method allows for reconstructing the low-wavenumber part of the background velocity model, even in the absence of long offsets and low-frequency component of the data. Moreover, in gradient-based iterative updates, instead of forming the data error conventionally, we propose to exploit the phase mismatch between the observed and the calculated data. The phase mismatch emphasizes a kinematic error and varies quasi-linearly with respect to the velocity error. The phase mismatch is computed (1) in the frequency-wavenumber (f-k) domain replacing the magnitudes of the calculated common shot gather by those of the observed one, and (2) in the temporal-spatial domain to form the difference between the transformed calculated common-shot gather and the observed one. The background velocity model inverted according to the proposed methods can serve as an improved initial velocity model for conventional waveform inversion. Tests with synthetic and field data show both the benefits and limitations of this method.
KAUST Department:
Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program
Publisher:
Elsevier BV
Journal:
Journal of Applied Geophysics
Issue Date:
Dec-2014
DOI:
10.1016/j.jappgeo.2014.09.012
Type:
Article
ISSN:
09269851
Sponsors:
The computation resource for inversion provided by the high performance computing center (HPC) of King Abdullah University of Science and Technology (KAUST) is greatly appreciated. The authors appreciate the professional comments of Prof. Gerard T. Schuster in the development of this paper. We thank generous sponsors for Center of Subsurface Imaging and Fluid Modeling (http://csim.kaust.edu.sa) in the year 2014. We are also grateful for the financial support from Nanjing University of Posts & Telecommunications.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division; Earth Science and Engineering Program

Full metadata record

DC FieldValue Language
dc.contributor.authorYu, Hanen
dc.contributor.authorHuang, Yunsongen
dc.date.accessioned2015-08-03T12:18:17Zen
dc.date.available2015-08-03T12:18:17Zen
dc.date.issued2014-12en
dc.identifier.issn09269851en
dc.identifier.doi10.1016/j.jappgeo.2014.09.012en
dc.identifier.urihttp://hdl.handle.net/10754/563884en
dc.description.abstractA background velocity model containing the correct low-wavenumber information is desired for both the quality of the migration image and the success of waveform inversion. To achieve this goal, the velocity is updated along the reflection wavepaths, rather than along both the reflection ellipses and transmission wavepaths as in conventional FWI. This method allows for reconstructing the low-wavenumber part of the background velocity model, even in the absence of long offsets and low-frequency component of the data. Moreover, in gradient-based iterative updates, instead of forming the data error conventionally, we propose to exploit the phase mismatch between the observed and the calculated data. The phase mismatch emphasizes a kinematic error and varies quasi-linearly with respect to the velocity error. The phase mismatch is computed (1) in the frequency-wavenumber (f-k) domain replacing the magnitudes of the calculated common shot gather by those of the observed one, and (2) in the temporal-spatial domain to form the difference between the transformed calculated common-shot gather and the observed one. The background velocity model inverted according to the proposed methods can serve as an improved initial velocity model for conventional waveform inversion. Tests with synthetic and field data show both the benefits and limitations of this method.en
dc.description.sponsorshipThe computation resource for inversion provided by the high performance computing center (HPC) of King Abdullah University of Science and Technology (KAUST) is greatly appreciated. The authors appreciate the professional comments of Prof. Gerard T. Schuster in the development of this paper. We thank generous sponsors for Center of Subsurface Imaging and Fluid Modeling (http://csim.kaust.edu.sa) in the year 2014. We are also grateful for the financial support from Nanjing University of Posts & Telecommunications.en
dc.publisherElsevier BVen
dc.subjectFrequency-wavenumber domainen
dc.subjectLow-wavenumberen
dc.subjectPhase inversionen
dc.subjectWavepathsen
dc.titleFrequency-wavenumber domain phase inversion along reflection wavepathsen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.contributor.departmentEarth Science and Engineering Programen
dc.identifier.journalJournal of Applied Geophysicsen
dc.contributor.institutionSchool of Computer Science and Technology, Nanjing University of Posts and TelecommunicationsNanjing, Chinaen
kaust.authorHuang, Yunsongen
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