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2.5D Inversion and Joint Interpretation of Marine EM Data at Sleipner CO2 StorageNormal access

Authors: J. Park, G. Sauvin, M. Vöge and M. Vanneste
Event name: Near Surface Geoscience 2016 - Second Applied Shallow Marine Geophysics Conference
Session: Environmental Applications and Non-seismic Methods II
Publication date: 04 September 2016
DOI: 10.3997/2214-4609.201602173
Organisations: EAGE
Language: English
Info: Extended abstract, PDF ( 741.36Kb )
Price: € 20

We present a new 2.5D inversion result of the Sleipner CSEM data that was acquired in 2008 for the purpose of monitoring the injected CO2. The new result shows more details of the CO2 plume in comparison to previous inversion results. In addition, we can identify accumulation of potential free gas in the region. According to the result, 1) there seems no indication of the injected CO2 leaking through the cap rock and overburden, and 2) all the mass of the injected CO2 is within the CO2 plume body detected by the CSEM inversion. The study also confirms that the marine CSEM can be an important and essential tool for offshore CO2 storage monitoring, yet when combined together with seismic and gravity. This study also demonstrates that CSEM can work, even when data interferes with infra-structures e.g. seabed pipeline.

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