Treatment equipment for compound flooding oil extraction liquid of offshore oilfield

The utility model discloses treatment equipment for compound flooding oil extraction liquid of an offshore oilfield. The equipment comprises a heater, an ultrasonic treatment device, a sedimentation device, and an electric dehydration device, wherein the heater is connected to a production well; the ultrasonic treatment device contains the heated compound flooding oil extraction liquid, and carries out ultrasonic treatment on the compound flooding oil extraction liquid; the sedimentation device is connected to the ultrasonic treatment device, contains the compound flooding oil extraction liquid after ultrasonic treatment, carries out heat sedimentation on the compound flooding oil extraction liquid to dewater, and separates out the oil; and the electric dehydration device is connected to the sedimentation device, contains the compound flooding oil extraction liquid after sedimentation treatment, and carries out electric field treatment on the compound flooding oil extraction liquid to further dewater. The treatment equipment disclosed by the utility model can be achieved by a compact design scheme, is suitable for application of an offshore platform with a narrow space, and can carry out efficient and reliable treatment on binary compound flooding oil extraction liquid within a short period of time.