Fracture Characterization at the Dickman Field, KS: Integrating Well Log and Prestack Seismic Analyses

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dc.contributor.advisorLiner, Christopher L.
dc.contributor.committeeMemberVan Wijk, Jolante W.
dc.contributor.committeeMemberBodmann, Bernhard G.
dc.creatorBrown, Timothy 1985-
dc.date.accessioned2014-03-13T19:56:03Z
dc.date.available2014-03-13T19:56:03Z
dc.date.createdAugust 2012
dc.date.issued2012-08
dc.date.updated2014-03-13T19:56:09Z
dc.description.abstractDickman Field, located in Ness County, Kansas, has produced 1.7 million barrels of oil since 1962 and is presently being evaluated by the University of Houston as a potential CO2 sequestration locality. The primary injection target is a porous, brine-saturated, Mississippian carbonate unit set approximately -2000 ft (-610 m) subsea. The objective of this study is to characterize sub-vertical fracture networks that potentially favor mobility of free-state CO2 within the reservoir. The 6 Hz results from a narrow-band decomposition of the Dickman 3D broadband volume show NW and NE striking lineaments in the reservoir interval. These spectral anomalies were originally assumed to be evidence of sub-resolution fracturing. Testing the validity of these features was accomplished by analyzing two kinds of data: 1) digital well logs from nearby wells and 2) available prestack seismic data from the Dickman 3D survey. A fuzzy inference system was used to obtain ground-truth fracture information from conventional well logs. Results show probable indicators of crosscutting fractures in the Mississippian section. Prestack analysis was used to detect azimuthal variations in the reflectivity gradient using amplitudes picked from the Gilmore City horizon. Azimuthal anisotropy orientations agree with the 6 Hz features as well as with lineament orientations found in previous seismic attribute studies. The 6 Hz anomalies, although supported by geological and geophysical evidence in terms of orientation, are most-likely products of low-frequency noise found in the upper 0.2 seconds of the Dickman 3D.
dc.description.departmentEarth and Atmospheric Sciences, Department of
dc.format.digitalOriginborn digital
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/10657/537
dc.language.isoeng
dc.rightsThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).
dc.subjectCO2 sequestration
dc.subjectKansas
dc.subjectFracture behavior
dc.subjectWell logs
dc.subjectFuzzy logic
dc.subjectAzimuthal AVO
dc.subjectSeismic attributes
dc.subject.lcshGeophysics
dc.titleFracture Characterization at the Dickman Field, KS: Integrating Well Log and Prestack Seismic Analyses
dc.type.dcmiText
dc.type.genreThesis
thesis.degree.collegeCollege of Natural Sciences and Mathematics
thesis.degree.departmentEarth and Atmospheric Sciences, Department of
thesis.degree.disciplineGeophysics
thesis.degree.grantorUniversity of Houston
thesis.degree.levelMasters
thesis.degree.nameMaster of Science

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