METHOD AND INSTALLATION FOR MEASURING FLOW RATE OF OIL WELL Russian patent published in 2021 - IPC E21B47/10 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil and gas industry and can be used to measure the flow rate of the liquid and gaseous phases of the formation fluid produced from oil wells. According to the method, the valve for the gas-oil-gas mixture inlet and the valve for the gas-oil-gas mixture outlet are opened, the valve for separating the gas-oil mixture is left closed. The pressure of the gas-oil mixture is measured. At least a part of the gas phase is separated from the gas-oil-gas mixture and a homogeneous water-oil mixture with small gas residues is created, which is treated with ultrasonic emitters, producing a complete separation of the gas from the water-oil mixture. Gas flow rate and oil-water mixture flow rate are measured. The volume fraction of water in the water-oil mixture is measured and the water flow rate and oil flow rate are calculated automatically. Visual monitoring of measured and command parameters is carried out. The processing of information about the parameters of the produced gas-liquid mixture is carried out. The information received by the connecting cables from the pressure sensor, gas flow meter, liquid flow meter and moisture meter and processed by the control controller in the measurement process is transmitted via a modem to a receiving and transmitting device, and then to an electronic computer with appropriate software. If necessary, the frequency of the ultrasound of the emitters is regulated. At the same time, a pressure sensor and an ultrasonic homogenizer with a labyrinth made inside its body in the form of a conical perforated pipe, vortex generator plates, perforated swirlers and a diverter, as well as with ultrasound emitters installed outside its body, are sequentially installed on a section of the system pipeline. The ultrasonic homogenizer is made with separate outlets for liquid and gas in the form of a liquid pipeline and a gas pipeline connected to it, respectively. A gas flow meter is installed on the gas pipeline, and a liquid flow meter and a moisture meter are sequentially installed on the liquid pipeline. The gas pipeline is connected with its other end to the section of the liquid pipeline in the section following the moisture meter. A control station with a data receiving and transmitting device is installed outside the system for measuring costs. Pressure sensor, gas flow meter, liquid flow meter, moisture meter and ultrasonic homogenizer are connected to the control station controller.

EFFECT: invention improves the quality of measuring the flow rate of the liquid and gaseous phases of the formation fluid.

4 cl, 2 dwg