Wave equation migration velocity analysis by differential semblance optimization

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dc.contributor.advisorSymes, William W.en_US
dc.creatorShen, Pengen_US
dc.date.accessioned2009-06-04T08:31:42Zen_US
dc.date.available2009-06-04T08:31:42Zen_US
dc.date.issued2005en_US
dc.description.abstractDifferential 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.en_US
dc.format.extent187 p.en_US
dc.format.mimetypeapplication/pdfen_US
dc.identifier.callnoTHESIS GEOL. 2005 SHENen_US
dc.identifier.citationShen, Peng. "Wave equation migration velocity analysis by differential semblance optimization." (2005) Diss., Rice University. <a href="https://hdl.handle.net/1911/18816">https://hdl.handle.net/1911/18816</a>.en_US
dc.identifier.urihttps://hdl.handle.net/1911/18816en_US
dc.language.isoengen_US
dc.rightsCopyright is held by the author, unless otherwise indicated. Permission to reuse, publish, or reproduce the work beyond the bounds of fair use or other exemptions to copyright law must be obtained from the copyright holder.en_US
dc.subjectGeophysicsen_US
dc.subjectComputer scienceen_US
dc.subjectAcousticsen_US
dc.titleWave equation migration velocity analysis by differential semblance optimizationen_US
dc.typeThesisen_US
dc.type.materialTexten_US
thesis.degree.departmentEarth Scienceen_US
thesis.degree.disciplineNatural Sciencesen_US
thesis.degree.grantorRice Universityen_US
thesis.degree.levelDoctoralen_US
thesis.degree.nameDoctor of Philosophyen_US
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