Imaging Techniques for Rock Characterization and EOR Processes 16. October 2012 Jarand Gauteplass Department of Physics and Technology University of Bergen

MRI-experiment CT-experiment

Experimental procedure: MRI-experiment

Experimental procedure: CT-experiment

Ambient temperature, 1200 psi CHP_CO2_2

SCA

Ambient temperature and pressure

Outcrop from Portland quarry in Ålborg, DK Similar to chalk reservoir rock in the North sea Effective porosity: 42 – 48% Abs permeability: 2 – 6 mD 99% calcite, 1% quartz

Results: Rock characterization using CT 40 x 40 x 42 microns resolution 1.5“ Rørdal chalk

Results: Rock characterization using CT 40 x 40 x 42 microns resolution 1.5“ Rørdal chalk

Results: Rock characterization using CT 40 x 40 x 42 microns resolution 1.5“ Rørdal chalk

Results: Rock characterization using CT 40 x 40 x 42 microns resolution 1.5“ Rørdal chalk

Ambient temperature, 1200 psi CHP_CO2_8

Results: CO 2 injection One SWW Rørdal chalk core (IAH=1.0) Liquid CO 2 conditions First contact miscible displacement Imaged using industrial CT

0 PV CO 2

0.01 PV

0.04 PV

0.07 PV

0.10 PV

0.12 PV

0.15 PV

0.18 PV

0.21 PV

0.24 PV

0.27 PV

0.30 PV

0.33 PV

0.36 PV

0.38 PV

0.41 PV

0.44 PV

0.48 PV

0.53 PV

0.59 PV

0.65 PV

0.88 PV

1.06 PV

Conclusions Shear bands identified Small heterogeneties have a large impact on core floods