Crosswell seismic and electromagnetic monitoring of CO2sequestration

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The quantitative estimation of changes in water saturation (S{sub W}) and effective pressure (P), in terms of changes in compressional and shear impedance, is becoming routine in the interpretations of time-lapse surface seismic data. However, when the number of reservoir constituents increases to include in situ gas and injected CO{sub 2}, there are too many parameters to be determined from seismic velocities or impedances alone. In such situations, the incorporation of electromagnetic (EM) images showing the change in electrical conductivity ({sigma}) provides essential independent information. The purpose of this study was to demonstrate a methodology for jointly interpreting crosswell seismic ... continued below

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Hoversten, G. Michael; Gritto, Roland; Daley, Thomas M.; Majer,Ernest L. & Myer, Larry R. July 30, 2002.

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Description

The quantitative estimation of changes in water saturation (S{sub W}) and effective pressure (P), in terms of changes in compressional and shear impedance, is becoming routine in the interpretations of time-lapse surface seismic data. However, when the number of reservoir constituents increases to include in situ gas and injected CO{sub 2}, there are too many parameters to be determined from seismic velocities or impedances alone. In such situations, the incorporation of electromagnetic (EM) images showing the change in electrical conductivity ({sigma}) provides essential independent information. The purpose of this study was to demonstrate a methodology for jointly interpreting crosswell seismic and EM data, in conjunction with detailed constitutive relations between geophysical and reservoir parameters, to quantitatively predict changes in P, S{sub W}, CO{sub 2} gas saturation (S{sub CO2}), CO{sub 2} gas/oil ratio (R{sub CO{sub 2}}), hydrocarbon gas saturation (S{sub g}), and hydrocarbon gas/oil ration (R{sub g}) in a reservoir undergoing CO{sub 2} flood.

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  • GHGT-6, Kyoto, Japan,10/1-4/2002

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  • Report No.: LBNL--51281-Ext.-Abs.
  • Grant Number: DE-AC02-05CH11231
  • Office of Scientific & Technical Information Report Number: 900639
  • Archival Resource Key: ark:/67531/metadc887584

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • July 30, 2002

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  • Sept. 22, 2016, 2:13 a.m.

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  • Sept. 30, 2016, 2:21 p.m.

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Hoversten, G. Michael; Gritto, Roland; Daley, Thomas M.; Majer,Ernest L. & Myer, Larry R. Crosswell seismic and electromagnetic monitoring of CO2sequestration, article, July 30, 2002; Berkeley, California. (digital.library.unt.edu/ark:/67531/metadc887584/: accessed October 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.