The average oil recovery rate (ORR) in Russia is 0.3, which means that the achieved amount of extracted oil is 30% of the geological (lying in the formation). Due to the irrational selection of the enhanced oil recovery method this problem is quite common. There is the trend of growing demand for petroleum products each year, it is necessary to increase the volume and pace of production. Due to the low ORR in Russia, it is necessary to search for new methods that can significantly increase the amount of extracted oil, as well as the productivity of wells and oilfields. The use of pump-ejector systems and injection of water-gas mixture into the reservoir is an excellent solution of this problem. The optimal pump-ejector parameters equipment providing SWAG injection on the formation in conditions of the Megion oil field were calculated in this work. © Published under licence by IOP Publishing Ltd.