Measurements of the capillary trapping of super-critical carbon dioxide in Berea sandstone

Details Measurements of the capillary trapping of super-critical carbon dioxide in Berea sandstone Measurements of the capillary trapping of super-critical carbon dioxide in Berea sandstone

Mar 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011georl..3806401p&link_type=abstract

Geophysical Research Letters, Volume 38, Issue 6, CiteID L06401

Physics

4

Hydrology: Groundwater Transport, Physical Properties Of Rocks: Transport Properties

Scientific paper

We measure primary drainage capillary pressure and the relationship between initial and residual non-wetting phase saturation for a supercritical carbon dioxide (CO2)-brine system in Berea sandstone. We use the semi-permeable disk (porous-plate) coreflood method. Brine and CO2 were equilibrated prior to injection to ensure immiscible displacement. A maximum CO2 saturation of 85% was measured for an applied capillary pressure of 296 kPa. After injection of brine the CO2 saturation dropped to 35%; this is less than the maximum trapped saturation of 48% measured in an equivalent n-decane (oil)-brine experiment. The dimensionless capillary pressure is the same to within experimental error for supercritical CO2-brine, n-decane-brine and a mercury-air system. CO2 is the non-wetting phase and significant quantities can be trapped by capillary forces. We discuss the implications for CO2 storage.

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