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dc.contributor.authorAlkhalifah, Tariq Ali
dc.contributor.authorChoi, Yun Seok
dc.date.accessioned2015-09-10T14:18:43Z
dc.date.available2015-09-10T14:18:43Z
dc.date.issued2013-05-31
dc.identifier.isbn9781629937915
dc.identifier.doi10.3997/2214-4609.20130413
dc.identifier.urihttp://hdl.handle.net/10754/577112
dc.description.abstractReflections in our seismic data induce serious nonlinear behavior in the objective function of full waveform inversion (FWI). Thus, without a good initial velocity model, that can produce the reflections within a cycle of the frequency used in the inversion, convergence to the solution becomes hard. Such velocity models are usually extracted from migration velocity analysis or traveltime tomography, among other means, that are not guaranteed to adhere to the FWI requirements. As such, we promote an objective function based on the misfit in the instantaneous traveltime between the observed and modeled data. This phase based attribute of the wavefield, along with its phase unwrapping features, provide a frequency dependent traveltime function. With strong damping of the of the synthetic, potentially low frequency, data, this attribute admits first arrival traveltime that could be compared with picked ones from the observed data, like in wave equation tomography. As we relax the damping on the synthetic and observed data, the objective function measures the misfit in the phase, however unwrapped in an FWI type inversion. It, thus, provides a single objective function and a natural transition from traveltime tomography to full waveform inversion. A Marmousi example demonstrates the effectiveness of the approach.
dc.publisherEAGE Publications
dc.titleFrom tomography to FWI with a single objective function
dc.typeConference Paper
dc.contributor.departmentEarth Science and Engineering Program
dc.contributor.departmentEnvironmental Science and Engineering Program
dc.contributor.departmentPhysical Science and Engineering (PSE) Division
dc.contributor.departmentSeismic Wave Analysis Group
dc.identifier.journalLondon 2013, 75th eage conference en exhibition incorporating SPE Europec
kaust.personAlkhalifah, Tariq Ali
kaust.personChoi, Yun Seok
dc.date.published-online2013-05-31
dc.date.published-print2013


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