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dc.contributor.advisorDavis, Thomas L. (Thomas Leonard), 1947-
dc.contributor.authorAvila Vizuett, Karla Cecilia
dc.contributor.committeememberTrainor-Guitton, Whitney
dc.contributor.committeememberSarg, J. F. (J. Frederick)
dc.contributor.committeememberRonquillo Jarillo, Gerardo
dc.date.accessioned2017-02-22T17:13:43Z
dc.date.available2017-02-22T17:13:43Z
dc.date.issued2017
dc.descriptionIncludes bibliographical references.
dc.description2017 Spring.
dc.description.abstractFracture characterization of a reservoir is very important because the presence of fractures determines the flow of hydrocarbons during production. Accurate modeling of the fracture network can help in optimizing the production of the reservoir. Fractures affect the amplitudes of the seismic waves, therefore, seismic attenuation is used to determine their characteristics. Here, I use a new technique called QVOA which involves the evaluation of the seismic attenuation and its variation with offset (O), and azimuth (A). Variation of seismic attenuation from QVOA methodologies can help in determining fracture characteristics where conventional methods fail. The QVOA method is a two step process where seismic attenuation is computed first and then its variation is determined with respect to offset and azimuth. I compute seismic attenuation using four different techniques based on the spectral ratio and frequency-shift methods. The variation with respect to offset and azimuth is determined using approximate method of sectors (ASM) and approximate truncate method (ATM). Orientation and the B-gradient of the fracture characteristics are obtained using this QVOA technique. I apply this QVOA technique to 3D seismic data acquired over the Gulf of Mexico region where the target is a naturally fractured carbonate reservoir. Fracture orientation in the reservoir region obtained using the QVOA technique are verified with well log data. Finally, a comparative analysis of different techniques of seismic attenuation computation is provided, where the frequency-shift methods perform better than the spectral ratio method, and are more stable in the presence of noise. Variation of the B-gradient versus the azimuth suggests the presence of attenuation anisotropy in this reservoir.
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.identifierT 8217
dc.identifier.urihttp://hdl.handle.net/11124/170674
dc.languageEnglish
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.relation.ispartof2017 - Mines Theses & Dissertations
dc.rightsCopyright of the original work is retained by the author.
dc.subjectimplementation and application
dc.subjectoffset and azimuth
dc.subjectseismic quality factor
dc.subjectnaturally fractured reservoirs
dc.subjectfracture characterization
dc.subjectseismic attenuation
dc.titleApplication of the seismic quality factor versus offset and azimuth (QVOA) for fractured reservoir characterization
dc.typeText
thesis.degree.disciplineGeophysics
thesis.degree.grantorColorado School of Mines
thesis.degree.levelMasters
thesis.degree.nameMaster of Science (M.S.)


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