Device and method for metering produced liquid

The invention relates to the technical field of oil and gas field exploitation, in particular to a produced liquid metering device and method. The produced liquid metering device comprises a pressure sensor, a receiving container, a produced liquid collecting container, a balance and a computer; the produced liquid collecting container is arranged on the balance and is connected with the bottom of the receiving container through a pipeline, and the other side of the bottom of the receiving container is connected with the pressure sensor; the pressure sensor and the balance are respectively connected with the computer. The volume of the produced liquid is determined through mass and pressure analysis by utilizing the polarity and density differences of different liquids and based on the principle that the total volume of the liquid in the container is constant, and then the oil-water volume, the water content and the recovery degree are determined. The problem that the volume of the produced liquid is difficul