Workflow for near-surface velocity automatic estimation: Source-domain full-traveltime inversion followed by waveform inversion

Handle URI:
http://hdl.handle.net/10754/625397
Title:
Workflow for near-surface velocity automatic estimation: Source-domain full-traveltime inversion followed by waveform inversion
Authors:
Liu, Lu; Fei, Tong; Luo, Yi; Guo, Bowen ( 0000-0001-7485-0866 )
Abstract:
This paper presents a workflow for near-surface velocity automatic estimation using the early arrivals of seismic data. This workflow comprises two methods, source-domain full traveltime inversion (FTI) and early-arrival waveform inversion. Source-domain FTI is capable of automatically generating a background velocity that can kinematically match the reconstructed plane-wave sources of early arrivals with true plane-wave sources. This method does not require picking first arrivals for inversion, which is one of the most challenging aspects of ray-based first-arrival tomographic inversion. Moreover, compared with conventional Born-based methods, source-domain FTI can distinguish between slower or faster initial model errors via providing the correct sign of the model gradient. In addition, this method does not need estimation of the source wavelet, which is a requirement for receiver-domain wave-equation velocity inversion. The model derived from source-domain FTI is then used as input to early-arrival waveform inversion to obtain the short-wavelength velocity components. We have tested the workflow on synthetic and field seismic data sets. The results show source-domain FTI can generate reasonable background velocities for early-arrival waveform inversion even when subsurface velocity reversals are present and the workflow can produce a high-resolution near-surface velocity model.
KAUST Department:
King Abdullah University of Science and Technology (KAUST)
Citation:
Liu L, Fei T, Luo Y, Guo B (2017) Workflow for near-surface velocity automatic estimation: Source-domain full-traveltime inversion followed by waveform inversion. SEG Technical Program Expanded Abstracts 2017. Available: http://dx.doi.org/10.1190/segam2017-17657809.1.
Publisher:
Society of Exploration Geophysicists
Journal:
SEG Technical Program Expanded Abstracts 2017
Issue Date:
17-Aug-2017
DOI:
10.1190/segam2017-17657809.1
Type:
Conference Paper
Sponsors:
The authors would like to thank Saudi Aramco for its support and permission to publish this paper.
Additional Links:
http://library.seg.org/doi/10.1190/segam2017-17657809.1
Appears in Collections:
Conference Papers

Full metadata record

DC FieldValue Language
dc.contributor.authorLiu, Luen
dc.contributor.authorFei, Tongen
dc.contributor.authorLuo, Yien
dc.contributor.authorGuo, Bowenen
dc.date.accessioned2017-08-23T11:54:07Z-
dc.date.available2017-08-23T11:54:07Z-
dc.date.issued2017-08-17en
dc.identifier.citationLiu L, Fei T, Luo Y, Guo B (2017) Workflow for near-surface velocity automatic estimation: Source-domain full-traveltime inversion followed by waveform inversion. SEG Technical Program Expanded Abstracts 2017. Available: http://dx.doi.org/10.1190/segam2017-17657809.1.en
dc.identifier.doi10.1190/segam2017-17657809.1en
dc.identifier.urihttp://hdl.handle.net/10754/625397-
dc.description.abstractThis paper presents a workflow for near-surface velocity automatic estimation using the early arrivals of seismic data. This workflow comprises two methods, source-domain full traveltime inversion (FTI) and early-arrival waveform inversion. Source-domain FTI is capable of automatically generating a background velocity that can kinematically match the reconstructed plane-wave sources of early arrivals with true plane-wave sources. This method does not require picking first arrivals for inversion, which is one of the most challenging aspects of ray-based first-arrival tomographic inversion. Moreover, compared with conventional Born-based methods, source-domain FTI can distinguish between slower or faster initial model errors via providing the correct sign of the model gradient. In addition, this method does not need estimation of the source wavelet, which is a requirement for receiver-domain wave-equation velocity inversion. The model derived from source-domain FTI is then used as input to early-arrival waveform inversion to obtain the short-wavelength velocity components. We have tested the workflow on synthetic and field seismic data sets. The results show source-domain FTI can generate reasonable background velocities for early-arrival waveform inversion even when subsurface velocity reversals are present and the workflow can produce a high-resolution near-surface velocity model.en
dc.description.sponsorshipThe authors would like to thank Saudi Aramco for its support and permission to publish this paper.en
dc.publisherSociety of Exploration Geophysicistsen
dc.relation.urlhttp://library.seg.org/doi/10.1190/segam2017-17657809.1en
dc.rightsArchived with thanks to SEG Technical Program Expanded Abstracts 2017en
dc.subjecttraveltimeen
dc.subjectvelocityen
dc.subjectwave equationen
dc.subjectinversionen
dc.titleWorkflow for near-surface velocity automatic estimation: Source-domain full-traveltime inversion followed by waveform inversionen
dc.typeConference Paperen
dc.contributor.departmentKing Abdullah University of Science and Technology (KAUST)en
dc.identifier.journalSEG Technical Program Expanded Abstracts 2017en
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionSaudi Aramcoen
kaust.authorGuo, Bowenen
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