The permanently installed vertical electrical resistivity array (VERA) as part of the multi-disciplinary surveillance concept of the Ketzin pilot site represents an interesting object for long-term monitoring and verification studies. A practical workflow has been established to qualify the acquired data considering site specific, operational and technical circumstances. An independently performed electrode test was carried out in order to investigate the behaviour of the individual borehole electrodes. In the present stage, consolidated data sets are available from which preliminary CO2 saturation maps have been derived.


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