On the Use of Contact Angle Measurements to Determine the Wetting Properties of CO2

This work presents new findings on the interaction of CO2-brine at reservoir conditions using the drop shape analysis method to determine contact angle and interfacial tension. Water-wet behaviour was observed at subcritical and supercritical conditions on a representative selection of real reservoir minerals. This study addresses fundamental physical properties of rock-fluid interactions pertaining to fluid flow and trapping at the pore-level.