An autonomous inflow control device includes a body defining a cavity. An inlet is in fluid communication with the cavity. The inlet receives well fluids. A deflection surface within the cavity deflects the well fluids at an angle based on a predetermined fluid property range of the well fluids. An influx outlet is in fluid communication with the cavity. An actuation device is disposed in the cavity and based on the angle the well fluids deflect off the deflection surface, the actuation device moves between an open position and a closed position. In the closed position, the actuation device covers the influx outlet. In the open position, the actuation device exposes the influx outlet to direct a volume of water from the well fluids out of the cavity. An outlet is in fluid communication with the cavity to direct the well fluids out of the cavity.