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dc.contributor.advisorCastagna, John P.
dc.creatorDe Abreu, Elita Selmara 1984-
dc.date.accessioned2018-11-30T15:59:33Z
dc.date.available2018-11-30T15:59:33Z
dc.date.created2018-05
dc.date.issuedMay 2018
dc.date.submittedMay 2018
dc.identifier.urihttp://hdl.handle.net/10657/3446
dc.description.abstractEvaluating the quality of seismic data based on the amplitude spectrum alone can be misleading, especially when comparing independently acquired and processed datasets. Spectral decomposition and frequency-dependent coherence can be combined to compare stratigraphic and structural details as a function of frequency. When this approach is applied to two 3D seismic datasets (2011 Legacy and 2015 Broadband) from the Chinook Field in the Gulf of Mexico, although the legacy and the broadband data have the same peak frequency and high-frequency cutoff, iso-frequency volumes from the Continuous Wavelet Transform and frequency-dependent coherence attributes indicate that the broadband data has better geological interpretability at high frequency. When phase decomposition is applied to pre-stack attributes on a 2D line across a thin 8-meter thick, gas-saturated reservoir in eastern Alberta, Canada, amplitude variation with angle is magnified on the -90o phase component, showing a stronger amplitude-versus-angle effect. The -90o far-offset component allows better mapping of the lateral extent of the reservoir. This amplification is also seen on the -90o phase component of the gradient attribute. The results are corroborated by seismic modeling which shows the same phase component relationships for near and far angle stacks and the gradient attribute.
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.subjectspectral decomposition, phase component
dc.titleSpectral and Phase Decomposition Case Studies
dc.date.updated2018-11-30T15:59:33Z
dc.type.genreThesis
thesis.degree.nameDoctor of Philosophy
thesis.degree.levelDoctoral
thesis.degree.disciplineGeophysics
thesis.degree.grantorUniversity of Houston
thesis.degree.departmentEarth and Atmospheric Sciences, Department of
dc.contributor.committeeMemberChesnokov, Evgeni M.
dc.contributor.committeeMemberZheng, Yingcai
dc.contributor.committeeMemberLira, José Eduardo M.
local.embargo.terms2020-05-01
local.embargo.lift2020-05-01
dcterms.accessRightsThe full text of this item is not available at this time because the student has placed this item under an embargo for a period of time. The Libraries are not authorized to provide a copy of this work during the embargo period.
dc.type.dcmiText
dc.format.digitalOriginborn digital
dc.description.departmentEarth and Atmospheric Sciences, Department of
thesis.degree.collegeCollege of Natural Sciences and Mathematics


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