Relative permeability and trapping of CO 2 and water in sandstone rocks at reservoir conditions

We report the results of an experimental investigation into the multiphase flow properties of CO 2 and water in four distinct sandstone rocks: a Berea sandstone and three reservoir rocks from formations into which CO 2 injection is either currently taking place or is planned. Drainage relative permeability and residual gas saturations were measured at 50°C and 9 MPa pore pressure using the steady state method in a horizontal core flooding apparatus with fluid distributions observed using x‐ray computed tomography. Absolute permeability, capillary pressure curves, and petrological studies were performed on each sample. Relative permeability in the four samples is consistent with general characteristics of…