Coupled physical and chemical processes occur along the injected CO2 pathway in a reservoir (in CCS or CO2-based EOR) and may have consequences on the reservoir petrophysical properties.

The work is based on the study of two carbonate rocks, all measurements were done using steady state method in the core flooding system. Petrophysical studies were performed on the two samples. The streaming potential coupling coefficient is basically defined as a sensitivity coefficient between the electrical potential and the variation of capillary pressure. In unsaturated porous medium this streaming potential coupling coefficient is controlled by CO2/N2-brine saturation and can be related to the CO2-brine relative permeability.


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