Sparse norm reflection tomography for handling velocity ambiguities

Yonadav Sudman, Dan Kosloff

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

Reflection seismology with the normal range of offsets encountered in seismic surveys is unable to resolve all the wavelength components of the subsurface velocity. One approach for overcoming this difficulty has been to drive the velocity determination towards models which make Geological sense. The assumption behind this study is that the velocities within subsurface layers tend to be smooth, excluding isolated areas where they can vary discontinuously. For accommodating this assumption we use a tomographic velocity determination method which is based on a Cauchy sparse norm and a representation of the parameters in the wavelet transform domain. The sparse tomography method is compared to conventional tomography in a synthetic example and a field data example. In general the sparse inversion produced superior results. In a second field data example, the new method is used for resolving artifacts caused by irregularities in the near surface as a result of permafrost.

Original languageEnglish
Title of host publicationSociety of Exploration Geophysicists - 75th SEG International Exposition and Annual Meeting, SEG 2005
PublisherSociety of Exploration Geophysicists
Pages2554-2557
Number of pages4
ISBN (Print)9781604236101
DOIs
StatePublished - 2005
Event75th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2005 - Houston, United States
Duration: 6 Nov 200511 Nov 2005

Publication series

NameSEG Technical Program Expanded Abstracts
ISSN (Print)1052-3812
ISSN (Electronic)1949-4645

Conference

Conference75th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2005
Country/TerritoryUnited States
CityHouston
Period6/11/0511/11/05

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