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Monitoring of underground CAES sites by geophysical methods

Said Attia al Hagrey1, Daniel Köhn1, Wolfgang Rabbel1
1 Institut für Geowissenschaften, Universität Kiel

P 11.6 in Wärme-, Energie- und Kohlenstoffspeicherung im Untergrund

 

Mitigation of anthropogenic green house gas GHG, including CO2 emissions in the atmosphere demand developments of renewable energy resources. However, most renewable energy sources are fluctuating and therefore need energy storage to match power supply and public demand. One possible solution is energy geostorage by injecting pressurized air in sealed underground structures.   

 

 

 

The ANGUS+ project is aimed at the development of combined modeling and inversion techniques to monitor the propagation of gas within the storage site and detect possible leakages. The aimed resolution for this monitoring task is challenging. One of our tasks within ANGUS+ deals with the application of a 2D elastic time-lapse seismic full waveform inversion (FWI), combined with electrical and gravimetric methods, to different synthetic modeling scenarios.

 

 

 

The resolution of the geophysical methods is demonstrated by an almost realistic virtual storage site in the North German basin.

 

The geophysical methods are able to recover the shape of the CAES-plume, as well as changes of the elastic and electrical parameters inside the plume. The gas saturations can be derived from both resulting seismic and electric models of constrained inversions using adequate petrophysical relationships (e.g. Gassman, Archie).

 

 

 

Acknowledgments:

This study has been carried out within the framework of ANGUS+ research project funded by the German Federal Ministry of Education and Research (BMBF). We thank project partners for efficient collaborations.

Letzte Änderung 01.11.2013