FIELD: oil production. SUBSTANCE: pressure differential is measured in each pipe-line going to injection well with the use of diaphragm and conditional flow rate is calculated per each well. Actual working characteristics of pump in the whole range of productivity are used to calculate discharge coefficient and its dependence on productivity-flow rate characteristic is constructed. Active power consumed by electric motor of pump drive from network as well as pressure at inlet and outlet of pump are measured. Power acting on shaft of pump and pressure differential across pump employed to calculate discharge coefficient are determined. Volume flow rate is found with the aid of flow rate characteristic by found value of discharge coefficient. Correction discharge coefficient is calculated per each injection well by way of division of total flow rate by sum of conditional flow rates and flow rate of each well is found by multiplication of conditional flow rate and correction discharge coefficient. EFFECT: increased measurement accuracy and simplified measurement process. 5 dwg
