Shot- and angle-domain wave-equation traveltime inversion of reflection data: Theory

Handle URI:
http://hdl.handle.net/10754/556185
Title:
Shot- and angle-domain wave-equation traveltime inversion of reflection data: Theory
Authors:
Zhang, Sanzong; Luo, Yi; Schuster, Gerard T. ( 0000-0001-7532-1587 )
Abstract:
The main difficulty with iterative waveform inversion is that it tends to get stuck in local minima associated with the waveform misfit function. To mitigate this problem and avoid the need to fit amplitudes in the data, we have developed a wave-equation method that inverts the traveltimes of reflection events, and so it is less prone to the local minima problem. Instead of a waveform misfit function, the penalty function was a crosscorrelation of the downgoing direct wave and the upgoing reflection wave at the trial image point. The time lag, which maximized the crosscorrelation amplitude, represented the reflection-traveltime residual (RTR) that was back projected along the reflection wavepath to update the velocity. Shot- and angle-domain crosscorrelation functions were introduced to estimate the RTR by semblance analysis and scanning. In theory, only the traveltime information was inverted and there was no need to precisely fit the amplitudes or assume a high-frequency approximation. Results with synthetic data and field records revealed the benefits and limitations of wave-equation reflection traveltime inversion.
KAUST Department:
Center for Subsurface Imaging and Fluid Modeling
Citation:
Shot- and angle-domain wave-equation traveltime inversion of reflection data: Theory 2015, 80 (4):U47 GEOPHYSICS
Publisher:
Society of Exploration Geophysicists
Journal:
GEOPHYSICS
Issue Date:
26-May-2015
DOI:
10.1190/geo2014-0178.1
Type:
Article
ISSN:
0016-8033; 1942-2156
Additional Links:
http://library.seg.org/doi/abs/10.1190/geo2014-0178.1
Appears in Collections:
Articles

Full metadata record

DC FieldValue Language
dc.contributor.authorZhang, Sanzongen
dc.contributor.authorLuo, Yien
dc.contributor.authorSchuster, Gerard T.en
dc.date.accessioned2015-06-03T08:31:58Zen
dc.date.available2015-06-03T08:31:58Zen
dc.date.issued2015-05-26en
dc.identifier.citationShot- and angle-domain wave-equation traveltime inversion of reflection data: Theory 2015, 80 (4):U47 GEOPHYSICSen
dc.identifier.issn0016-8033en
dc.identifier.issn1942-2156en
dc.identifier.doi10.1190/geo2014-0178.1en
dc.identifier.urihttp://hdl.handle.net/10754/556185en
dc.description.abstractThe main difficulty with iterative waveform inversion is that it tends to get stuck in local minima associated with the waveform misfit function. To mitigate this problem and avoid the need to fit amplitudes in the data, we have developed a wave-equation method that inverts the traveltimes of reflection events, and so it is less prone to the local minima problem. Instead of a waveform misfit function, the penalty function was a crosscorrelation of the downgoing direct wave and the upgoing reflection wave at the trial image point. The time lag, which maximized the crosscorrelation amplitude, represented the reflection-traveltime residual (RTR) that was back projected along the reflection wavepath to update the velocity. Shot- and angle-domain crosscorrelation functions were introduced to estimate the RTR by semblance analysis and scanning. In theory, only the traveltime information was inverted and there was no need to precisely fit the amplitudes or assume a high-frequency approximation. Results with synthetic data and field records revealed the benefits and limitations of wave-equation reflection traveltime inversion.en
dc.publisherSociety of Exploration Geophysicistsen
dc.relation.urlhttp://library.seg.org/doi/abs/10.1190/geo2014-0178.1en
dc.rightsArchived with thanks to GEOPHYSICSen
dc.subjectcrosscorrelationen
dc.subjectinversionen
dc.subjectwave equationen
dc.subjecttraveltimeen
dc.subjecttomographyen
dc.titleShot- and angle-domain wave-equation traveltime inversion of reflection data: Theoryen
dc.typeArticleen
dc.contributor.departmentCenter for Subsurface Imaging and Fluid Modelingen
dc.identifier.journalGEOPHYSICSen
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionSaudi Aramco, Exploration and Petroleum Engineering Center — Advanced Research Center, Dhahran, Saudi Arabiaen
kaust.authorSchuster, Gerard T.en
kaust.authorZhang, Sanzongen
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