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An inverse modelling approach for assessing CO2 - exposure experiments on Ketzin sandstone

Authors
/persons/resource/delucia

De Lucia,  Marco
5.3 Hydrogeology, 5.0 Earth Surface Processes, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/fischer

Fischer,  Sebastian
CGS Centre for Geological Storage, Geoengineering Centres, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/alieb

Liebscher,  Axel
CGS Centre for Geological Storage, Geoengineering Centres, GFZ Publication Database, Deutsches GeoForschungsZentrum;

/persons/resource/mkuehn

Kühn,  Michael
5.3 Hydrogeology, 5.0 Earth Surface Processes, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;

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Citation

De Lucia, M., Fischer, S., Liebscher, A., Kühn, M. (2013): An inverse modelling approach for assessing CO2 - exposure experiments on Ketzin sandstone. - Mineralogical Magazine - Goldschmidt Conference Abstracts, 77, 5, 968-968.
https://doi.org/10.1180/minmag.2013.077.5.4


https://gfzpublic.gfz-potsdam.de/pubman/item/item_247761
Abstract
For 24 months, reservoir sandstone samples from the Stuttgart Formation at the Ketzin pilot CO2 storage site in Germany were exposed to synthetic brine and pure CO2 at 55 bar and 40 °C [1]. Only minor mineralogical changes were directly observed after the experiments, making it difficult to discriminate natural variability of the samples from CO2-induced alterations. During the progress of the experiments fluid samples were taken from the autoclaves in order to track the reactivity of the rock samples as reflected by changes in brine composition. Even these results show high variability and at times qualitatively opposite concentration trends for some dissolved species.