WP-leader:

Harald Johansen

Institute of Energy Technology 

E-mail:  harald.johansen(at)ife.no 

Field of expertise: Geology, Environmental geology, Geochemistry, CO2 storage, Hydrogeology, SUCCESS-CEER

The WP3 Seal activity is focused on two levels:

On the large scale focus has been on the “Seal Sequence Concept”, which has involved identification of all important seal objects, their position in the sedimentary basin, their interdependence on each other, and their function with respect to CO2 retention capacity together with evaluation of the cementation of fractures by carbonates.

On the small scale of individual objects, the focus is on material properties, and specifically on their predicted dynamic behaviour as a response to the stress introduced by CO2 injection. Two particular objects/materials are in focus : microfractures and clay minerals, that represent an important component of caprocks and overburden sediments. A theoretical concept for porosity waves (e.g. dynamic changes in porosity and permeability due to stress variation) has also been initiated.

The activities in Work Package 3 are:

3.1 Seal sequence concept / basis for experimental work

3.2 Review of geochemical reactions in faults and fractures

3.3 Experimental data on individual seal elements (caprock, well materials)

3.4 Modeling of seal elements (caprock, well materials)

3.5 Coupled flow model

3.6 Quantification of leakage

3.7. Integrated concepts for seal sequence