Geophone Array Optimization for Monitoring Geologic Carbon Sequestration using Double-Difference Tomography

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dc.contributor.authorFahrman, Benjamin Paulen
dc.contributor.committeechairWestman, Erik C.en
dc.contributor.committeememberLuxbacher, Kramer Davisen
dc.contributor.committeememberKarfakis, Mario G.en
dc.contributor.departmentMining and Minerals Engineeringen
dc.date.accessioned2014-03-14T20:50:27Zen
dc.date.adate2012-01-13en
dc.date.available2014-03-14T20:50:27Zen
dc.date.issued2011-12-05en
dc.date.rdate2012-01-13en
dc.date.sdate2011-12-19en
dc.description.abstractAnalysis of synthetic data was performed to determine the most cost-effective tomographic monitoring system for a geologic carbon sequestration injection site. Artificial velocity models were created that accounted for the expected velocity decrease due to the existence of a CO₂ plume after underground injection into a depleted petroleum reservoir. Seismic events were created to represent induced seismicity from injection, and five different geophone arrays were created to monitor this artificial seismicity. Double-difference tomographic inversion was performed on 125 synthetic data sets: five stages of CO₂ plume growth, five seismic event regions, and five geophone arrays. Each resulting velocity model from tomoDD—the double-difference tomography program used for inversion—was compared quantitatively to its respective synthetic velocity model to determine an accuracy value. The quantitative results were examined in an attempt to determine a relationship between cost and accuracy in monitoring, verification, and accounting applications using double-difference tomography. While all scenarios resulted in little error, no such relationship could be found. The lack of a relationship between cost and error is most likely due to error inherent to the travel time calculation algorithm used.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-12192011-153230en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-12192011-153230/en
dc.identifier.urihttp://hdl.handle.net/10919/36315en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartFahrman_BP_T_2011.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectPassive Seismic Double-Difference Tomographyen
dc.subjectGeologic Carbon Sequestrationen
dc.subjectSynthetic Dataen
dc.titleGeophone Array Optimization for Monitoring Geologic Carbon Sequestration using Double-Difference Tomographyen
dc.typeThesisen
thesis.degree.disciplineMining and Minerals Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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