Application of weighted early-arrival waveform inversion to shallow land data

Handle URI:
http://hdl.handle.net/10754/563414
Title:
Application of weighted early-arrival waveform inversion to shallow land data
Authors:
Yu, Han; Zhang, Dongliang; Wang, Xin
Abstract:
Seismic imaging of deep land targets is usually difficult since the near-surface velocities are not accurately estimated. Recent studies have shown that inverting traces weighted by the energy of the early-arrivals can improve the accuracy of estimating shallow velocities. In this work, it is explained by showing that the associated misfit gradient function tends to be sensitive to the kinetics of wave propagation and insensitive to the dynamics. A synthetic example verifies the theoretical predictions and shows that the effects of noise and unpredicted amplitude variations in the inversion are reduced using this weighted early arrival waveform inversion (WEWI). We also apply this method to a 2D land data set for estimating the near-surface velocity distribution. The reverse time migration images suggest that, compared to the tomogram inverted directly from the early arrival waveforms, the WEWI tomogram provides a more convincing velocity model and more focused reflections in the deeper part of the image. © 2014 Elsevier B.V.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Publisher:
Elsevier BV
Journal:
Journal of Applied Geophysics
Issue Date:
Mar-2014
DOI:
10.1016/j.jappgeo.2014.01.003
Type:
Article
ISSN:
09269851
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorYu, Hanen
dc.contributor.authorZhang, Dongliangen
dc.contributor.authorWang, Xinen
dc.date.accessioned2015-08-03T11:47:58Zen
dc.date.available2015-08-03T11:47:58Zen
dc.date.issued2014-03en
dc.identifier.issn09269851en
dc.identifier.doi10.1016/j.jappgeo.2014.01.003en
dc.identifier.urihttp://hdl.handle.net/10754/563414en
dc.description.abstractSeismic imaging of deep land targets is usually difficult since the near-surface velocities are not accurately estimated. Recent studies have shown that inverting traces weighted by the energy of the early-arrivals can improve the accuracy of estimating shallow velocities. In this work, it is explained by showing that the associated misfit gradient function tends to be sensitive to the kinetics of wave propagation and insensitive to the dynamics. A synthetic example verifies the theoretical predictions and shows that the effects of noise and unpredicted amplitude variations in the inversion are reduced using this weighted early arrival waveform inversion (WEWI). We also apply this method to a 2D land data set for estimating the near-surface velocity distribution. The reverse time migration images suggest that, compared to the tomogram inverted directly from the early arrival waveforms, the WEWI tomogram provides a more convincing velocity model and more focused reflections in the deeper part of the image. © 2014 Elsevier B.V.en
dc.publisherElsevier BVen
dc.subjectEarly arrivalen
dc.subjectPhase matchen
dc.subjectWaveform inversionen
dc.subjectWeightingen
dc.titleApplication of weighted early-arrival waveform inversion to shallow land dataen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalJournal of Applied Geophysicsen
kaust.authorYu, Hanen
kaust.authorZhang, Dongliangen
kaust.authorWang, Xinen
All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.