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    Monitoring and volumetric estimation of injected CO 2 using 4D seismic, petrophysical data, core measurements and well logging: A case study at Ketzin, Germany

    Access Status
    Open access via publisher
    Authors
    Ivanova, A.
    Kashubin, A.
    Juhojuntti, N.
    Kummerow, J.
    Henninges, J.
    Juhlin, Christopher
    Lüth, S.
    Ivandic, M.
    Date
    2012
    Type
    Journal Article
    
    Metadata
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    Citation
    Ivanova, A. and Kashubin, A. and Juhojuntti, N. and Kummerow, J. and Henninges, J. and Juhlin, C. and Lüth, S. et al. 2012. Monitoring and volumetric estimation of injected CO 2 using 4D seismic, petrophysical data, core measurements and well logging: A case study at Ketzin, Germany. Geophysical Prospecting. 60 (5): pp. 957-973.
    Source Title
    Geophysical Prospecting
    DOI
    10.1111/j.1365-2478.2012.01045.x
    ISSN
    0016-8025
    School
    Department of Exploration Geophysics
    URI
    http://hdl.handle.net/20.500.11937/10638
    Collection
    • Curtin Research Publications
    Abstract

    More than 50 000 tons of CO 2 have been injected at Ketzin into the Stuttgart Formation, a saline aquifer, at approximately 620 m depth, as of summer 2011. We present here results from the 1 st repeat 3D seismic survey that was performed at the site in autumn 2009, after about 22 000 tons of CO 2 had been injected. We show here that rather complex time-lapse signatures of this CO 2 can be clearly observed within a radius of about 300 m from the injection well. The highly irregular amplitude response within this radius is attributed to the heterogeneity of the injection reservoir. Time delays to a reflection below the injection level are also observed. Petrophysical measurements on core samples and geophysical logging of CO 2 saturation levels allow an estimate of the total amount of CO 2 visible in the seismic data to be made. These estimates are somewhat lower than the actual amount of CO 2 injected at the time of the survey and they are dependent upon the choice of a number of parameters. In spite of some uncertainty, the close agreement between the amount injected and the amount observed is encouraging for quantitative monitoring of a CO 2 storage site using seismic methods. © 2012 European Association of Geoscientists & Engineers.

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