Improving Seismic-to-well Ties

atmire.migration.oldid3894
dc.contributor.advisorMargrave, Gary
dc.contributor.authorCui, Tianci
dc.contributor.committeememberLines, Laurence
dc.contributor.committeememberRios, Cristian
dc.date.accessioned2015-12-07T20:55:15Z
dc.date.available2015-12-07T20:55:15Z
dc.date.issued2015-12-07
dc.date.submitted2015en
dc.description.abstractSeismic-to-well ties are important for seismic interpretation and impedance inversion. Reflectivity can be calculated directly from well logs while its estimation from seismic data requires the determination of the seismic wavelet and the removal of the same. In the presence of anelastic attenuation, the constant-Q theory predicts that the seismic wavelet evolves with amplitude decay and minimum-phase dispersion. Stationary deconvolution estimates and eliminates a single wavelet from the nonstationary trace, resulting in large nonstationary amplitude and phase errors. Gabor deconvolution accurately estimates and eliminates the amplitude spectra of the propagating wavelets, but only corrects the phase to the seismic Nyquist frequency. A phase correction operator is developed to correct the phase to the well logging frequency. Both synthetic and real data examples show seismic-to-well ties can be improved by correcting their time shifts via smooth dynamic time warping and addressing slowly time-variant nonstationarity in a sliding Gaussian window.en_US
dc.identifier.citationCui, T. (2015). Improving Seismic-to-well Ties (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/26495en_US
dc.identifier.doihttp://dx.doi.org/10.11575/PRISM/26495
dc.identifier.urihttp://hdl.handle.net/11023/2664
dc.language.isoeng
dc.publisher.facultyGraduate Studies
dc.publisher.institutionUniversity of Calgaryen
dc.publisher.placeCalgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.
dc.subjectGeophysics
dc.subjectMathematics
dc.subjectComputer Science
dc.subject.classificationseismic-to-well tiesen_US
dc.subject.classificationDynamic Time Warpingen_US
dc.subject.classificationanelastic attentuationen_US
dc.subject.classificationGabor deconvolutionen_US
dc.titleImproving Seismic-to-well Ties
dc.typemaster thesis
thesis.degree.disciplineGeology and Geophysics
thesis.degree.grantorUniversity of Calgary
thesis.degree.nameMaster of Science (MSc)
ucalgary.item.requestcopytrue
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