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Wave equation migration velocity analysis by differential semblance optimization

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dc.contributor.advisor Symes, William W.
dc.creator Shen, Peng
dc.date.accessioned 2009-06-04T08:31:42Z
dc.date.available 2009-06-04T08:31:42Z
dc.date.issued 2005
dc.identifier.uri http://hdl.handle.net/1911/18816
dc.description.abstract Differential semblance measures the deviation from flatness or focus of image gathers. The differential semblance objective function posed on the sub-surface offset domain responds smoothly to velocity changes. Therefore gradient descent methods are uniquely attractive for velocity updating by differential semblance optimization. Because of their kinematic fidelity, wave equation (depth extrapolation) migration methods are natural platforms for velocity analysis in complex structures. The gradient of the objective function with respect to velocity is fomulated through the adjoint of differential migration. Limited memory BFGS algorithm is used for the velocity optimization. The method for wave equation velocity analysis developed in this thesis study is applied to both synthetic and real data examples.
dc.format.extent 187 p.
dc.format.mimetype application/pdf
dc.language.iso eng
dc.subject Geophysics
Computer Science
Physics, Acoustics
dc.title Wave equation migration velocity analysis by differential semblance optimization
dc.type.genre Thesis
dc.type.material Text
thesis.degree.department Earth Science
thesis.degree.discipline Natural Sciences
thesis.degree.grantor Rice University
thesis.degree.level Doctoral
thesis.degree.name Doctor of Philosophy
dc.identifier.citation Shen, Peng. (2005) "Wave equation migration velocity analysis by differential semblance optimization." Doctoral Thesis, Rice University. http://hdl.handle.net/1911/18816.

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