Show simple item record

dc.contributor.authorLi, Y.
dc.contributor.authorChoi, Yun Seok
dc.contributor.authorAlkhalifah, Tariq Ali
dc.contributor.authorLi, Z.
dc.date.accessioned2017-06-14T06:39:40Z
dc.date.available2017-06-14T06:39:40Z
dc.date.issued2017-05-26
dc.identifier.citationLi Y, Choi Y, Alkhalifah T, Li Z (2017) Full Waveform Inversion Using Nonlinearly Smoothed Wavefields. 79th EAGE Conference and Exhibition 2017. Available: http://dx.doi.org/10.3997/2214-4609.201701342.
dc.identifier.doi10.3997/2214-4609.201701342
dc.identifier.urihttp://hdl.handle.net/10754/624987
dc.description.abstractThe lack of low frequency information in the acquired data makes full waveform inversion (FWI) conditionally converge to the accurate solution. An initial velocity model that results in data with events within a half cycle of their location in the observed data was required to converge. The multiplication of wavefields with slightly different frequencies generates artificial low frequency components. This can be effectively utilized by multiplying the wavefield with itself, which is nonlinear operation, followed by a smoothing operator to extract the artificially produced low frequency information. We construct the objective function using the nonlinearly smoothed wavefields with a global-correlation norm to properly handle the energy imbalance in the nonlinearly smoothed wavefield. Similar to the multi-scale strategy, we progressively reduce the smoothing width applied to the multiplied wavefield to welcome higher resolution. We calculate the gradient of the objective function using the adjoint-state technique, which is similar to the conventional FWI except for the adjoint source. Examples on the Marmousi 2 model demonstrate the feasibility of the proposed FWI method to mitigate the cycle-skipping problem in the case of a lack of low frequency information.
dc.description.sponsorshipWe thank KAUST for its support and the SWAG for collaborative environment. Author Yuanyuan Li wishes to thank the China Scholarship Council for support to study abroad.
dc.publisherEAGE Publications BV
dc.relation.urlhttp://www.earthdoc.org/publication/publicationdetails/?publication=89057
dc.rightsArchived with thanks to 79th EAGE Conference and Exhibition 2017
dc.titleFull Waveform Inversion Using Nonlinearly Smoothed Wavefields
dc.typeConference Paper
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Division
dc.contributor.departmentEarth Science and Engineering Program
dc.identifier.journal79th EAGE Conference and Exhibition 2017
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionChina University of Petroleum (East China)
kaust.personChoi, Yun Seok
kaust.personAlkhalifah, Tariq Ali
refterms.dateFOA2018-06-13T10:55:16Z


Files in this item

Thumbnail
Name:
We P1 15.pdf
Size:
2.031Mb
Format:
PDF
Description:
Expanded Abstract

This item appears in the following Collection(s)

Show simple item record