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    Combination of seismic reflection and constrained resistivity inversion with an application to 4D imaging of the CO2 storage site, Ketzin, Germany

    Access Status
    Fulltext not available
    Authors
    Bergmann, P.
    Ivandic, M.
    Norden, B.
    Rücker, C.
    Kiessling, D.
    Lüth, S.
    Schmidt-Hattenberger, C.
    Juhlin, Christopher
    Date
    2013
    Type
    Journal Article
    
    Metadata
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    Citation
    Bergmann, P. and Ivandic, M. and Norden, B. and Rücker, C. and Kiessling, D. and Lüth, S. and Schmidt-Hattenberger, C. et al. 2013. Combination of seismic reflection and constrained resistivity inversion with an application to 4D imaging of the CO2 storage site, Ketzin, Germany. Geophysics. 79 (2): pp. B37-B50.
    Source Title
    Geophysics
    DOI
    10.1190/GEO2013-0131.1
    ISSN
    0016-8033
    School
    Department of Exploration Geophysics
    URI
    http://hdl.handle.net/20.500.11937/46703
    Collection
    • Curtin Research Publications
    Abstract

    A combination of seismic and geoelectric processing was studied by means of a structurally constrained inversion approach. Structural constraints were interpreted from the seismic data and integrated into the geoelectric inversion through a local regularization, which allowed inverted resistivities to behave discontinuously across defined boundaries. This arranged seismic processing and constrained resistivity inversion in a sequential workflow, making the generic assumption that the petrophysical parameters of both methods change across common lithostructural boundaries. We evaluated the approach using a numerical example and a real data example from the Ketzin CO2 pilot storage site, Germany. The latter demonstrated the efficiency of this approach for combining 4D seismic and surface-downhole geoelectric data. In consistence with the synthetic example, the constrained resistivity inversions produced clearer delineated images along the boundary between caprock and reservoir formation. Near the CO2-flooded reservoir, the seismic and geoelectric time-lapse anomalies correlated well. At some distance to the downhole electrodes, however, the geoelectric images conveyed a notably lower resolution in comparison to the corresponding seismic images. Both methods confirm a northwesterly trend for the CO2 migration at the Ketzin site, although a rather northerly direction was initially expected. The results demonstrate the relevance of the presented approach for the combination of both methods for integrated geophysical CO2 storage monitoring.

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