1887

Abstract

Summary

A combination of seismic and geoelectric processing is presented using a structurally constrained inversion approach. Structural constraints are interpreted from seismic data and inserted into the geoelectric inversion through a local regularisation, which allows inverted resistivities to behave also discontinuously across these a priori constraints. This sequential arrangement of seismic processing and constrained resistivity inversion makes the generic assumption that the petrophysical parameters of both methods change across common lithostructural boundaries. We evaluate the approach using a numerical example and a real 4D data example from the CO2 pilot storage site, Ketzin, Germany. The real data case shows that the time-lapse anomalies, which have independently been imaged by surface seismic and surface-downhole geoelectric methods, correlate well at the CO2-flooded reservoir. However, at some distance to the downhole electrodes the geoelectric images provide a notably lower resolution in comparison to the corresponding seismic images. The results demonstrate the relevance of the presented approach for the combination of both methods in geophysical CO2 storage monitoring operations.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609.20141000
2014-06-16
2024-04-16
Loading full text...

Full text loading...

References

  1. Bergmann, P., Schmidt-Hattenberger, C., Kiessling, D., Rücker, C., Labitzke, T., Henninges, J., Baumann, G. and Schütt, H.
    [2012]. Surface-downhole electrical resistivity tomography applied to monitoring of CO2 storage at Ketzin, Germany. Geophysics, 77, B253–B267.
    [Google Scholar]
  2. Bergmann, P., Ivandic, M., Norden, B., Rücker, C., Kiessling, D., Lüth, S., Schmidt-Hattenberger, C. and Juhlin, C.
    [2014]. Combination of seismic reflection and constrained resistivity inversion with an application to 4D imaging of the CO2 storage site, Ketzin, Germany, Geophysics. 97(2), B37–B50.
    [Google Scholar]
  3. Günther, T. and Rücker, C.
    [2006]. A general approach for introducing information into inversion and examples from DC resistivity inversion. EAGE Near Surface Geophysics Workshop, 4–6 September 2006, Helsinki, Finland, Extended Abstract.
    [Google Scholar]
  4. Ivanova, A., Kashubin, A., Juhojuntti, N., Kummerow, J., Henninges, J., Juhlin, C., Lüth, S. and Ivandic, M.
    [2012]. Monitoring and volumetric estimation of injected CO2 using 4D seismic, petrophysical data, core measurements and well logging: A case study at Ketzin, Germany. Geophysical Prospecting, 60, 957–973.
    [Google Scholar]
  5. Juhlin, C., Giese, R., Zinck-Jørgensen, K., Cosma, C., Kazemeini, H., Juhojuntti, N., Lüth, S., NordenB. and Förster, A.
    [2007]. 3D baseline seismics at Ketzin, Germany: The CO2SINK project. Geophysics, 72, B121–B132.
    [Google Scholar]
  6. Kummerow, J. and SpangenbergE.
    [2011]. Experimental evaluation of the impact of the interactions of CO2-SO2, brine, and reservoir rock on petrophysical properties: A case study from the Ketzin test site, Germany. Geochemistry Geophysics Geosystems, 12, Q05010.
    [Google Scholar]
http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609.20141000
Loading
/content/papers/10.3997/2214-4609.20141000
Loading

Data & Media loading...

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error