Pore scale processes in mixed-wet systems with application to low salinity waterflooding

In this study, we focused on describing the types and time scales of displacement occurring in mixed-wet systems and compared them to data from water-wet systems. Additionally, the alteration of wettability when changing brine salinity was explored, including factors influencing the process, relevant time scales, and possibilities for oil mobilization. To investigate these topics, we visualized the pore space with micro-models and X-ray microtomography in combination with in-house-built equipment. These techniques allowed the 2D and 3D in-situ observation of multiphase flow.