TY - GEN
T1 - Sparse norm reflection tomography for handling velocity ambiguities
AU - Sudman, Yonadav
AU - Kosloff, Dan
N1 - Publisher Copyright:
© Society of Exploration Geophysicists - 75th SEG International Exposition and Annual Meeting, SEG 2005. All rights reserved.
PY - 2005
Y1 - 2005
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85055883511&partnerID=8YFLogxK
U2 - 10.1190/1.2148244
DO - 10.1190/1.2148244
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AN - SCOPUS:85055883511
SN - 9781604236101
T3 - SEG Technical Program Expanded Abstracts
SP - 2554
EP - 2557
BT - Society of Exploration Geophysicists - 75th SEG International Exposition and Annual Meeting, SEG 2005
PB - Society of Exploration Geophysicists
T2 - 75th Society of Exploration Geophysicists International Exposition and Annual Meeting, SEG 2005
Y2 - 6 November 2005 through 11 November 2005
ER -