This article presents a method for calculating the operating parameters of a liquid-gas ejector using the average integral performance, which simplifies the selection of an ejector when configuring a pump-ejector system. Previous studies have shown that it is possible to generalize the performances of the ejector using dimensionless parameters – relative pressure drop and average integral injection coefficient. However, the method itself with an explanation was not developed and published. To fill this gap, a method for calculating the operating dimensional parameters of the ejector (gas flow rate and developed pressure) using the average integral performance was created and tested. The developed method makes it possible to calculate, with sufficient accuracy for practical purposes, the pumped gas flow rate and outlet pressure in different modes in the range of absolute pressures at the entrance to the ejector receiving chamber from 3 to 10 bar and operating pressures in front of the nozzle from 61 to 121 bar. The technique is applicable not only in bench conditions, but also in field conditions. A comparison of the calculated and actual values of gas consumption showed that the maximum relative deviation of the calculated values from the actual ones does not exceed 5%. The scientific novelty consists in the development of a graphical-analytical method for calculating the operating parameters of a liquid-gas ejector based on the average integral characteristic, which ensures good convergence of calculated and actual data. This will allow increasing oil recovery by introducing the SWAG-technology and reducing annular pressures. Keywords: waterflooding; simultaneous water and gas injection (SWAG-technology); associated petroleum gas; pump-ejector systems; liquid-gas ejectors (or jet devices); average integral injection coefficient.
E. I. Gorelkina (Mon,) studied this question.