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dc.contributor.authorLi, Yuanyuan
dc.contributor.authorLi, Zhenchun
dc.contributor.authorAlkhalifah, Tariq Ali
dc.contributor.authorGuo, Qiang
dc.date.accessioned2017-08-23T11:54:06Z
dc.date.available2017-08-23T11:54:06Z
dc.date.issued2017-08-17
dc.identifier.citationLi Y, Li Z, Alkhalifah T, Guo Q (2017) Elastic reflection waveform inversion with variable density. SEG Technical Program Expanded Abstracts 2017. Available: http://dx.doi.org/10.1190/segam2017-17723202.1.
dc.identifier.doi10.1190/segam2017-17723202.1
dc.identifier.urihttp://hdl.handle.net/10754/625381
dc.description.abstractElastic full waveform inversion (FWI) provides a better description of the subsurface than those given by the acoustic assumption. However it suffers from a more serious cycle skipping problem compared with the latter. Reflection waveform inversion (RWI) provides a method to build a good background model, which can serve as an initial model for elastic FWI. Therefore, we introduce the concept of RWI for elastic media, and propose elastic RWI with variable density. We apply Born modeling to generate the synthetic reflection data by using optimized perturbations of P- and S-wave velocities and density. The inversion for the perturbations in P- and S-wave velocities and density is similar to elastic least-squares reverse time migration (LSRTM). An incorrect initial model will lead to some misfits at the far offsets of reflections; thus, can be utilized to update the background velocity. We optimize the perturbation and background models in a nested approach. Numerical tests on the Marmousi model demonstrate that our method is able to build reasonably good background models for elastic FWI with absence of low frequencies, and it can deal with the variable density, which is needed in real cases.
dc.description.sponsorshipWe thank KAUST for its support and SWAG for collaborative environment. The authors would like to thank the China Scholarship Council for supporting the study. This research is also sponsored by Fundamental Research Funds for Central Universities (16CX06039A).
dc.publisherSociety of Exploration Geophysicists
dc.relation.urlhttp://library.seg.org/doi/10.1190/segam2017-17723202.1
dc.rightsArchived with thanks to SEG Technical Program Expanded Abstracts 2017
dc.subjectreflection
dc.subjectmultiparameter
dc.subjectfull-waveform inversion
dc.subjectelastic
dc.titleElastic reflection waveform inversion with variable density
dc.typeConference Paper
dc.contributor.departmentEarth Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentSeismic Wave Analysis Group
dc.identifier.journalSEG Technical Program Expanded Abstracts 2017
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionChina University of Petroleum-East China
kaust.personAlkhalifah, Tariq Ali
kaust.personGuo, Qiang
refterms.dateFOA2018-06-13T18:45:59Z
dc.date.published-online2017-08-17
dc.date.published-print2017-08-17


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