Investigation of pump-ejector systems characteristics for water alternating gas injection

In this article, the experiments conducted to increase the efficiency of the use of pumping-ejector systems used for the enhanced oil recovery metod. This method is the water alternating gas injection. Water alternating gas injection implies the injection of alternately water and gas, or a water-gas mixture - simultaneous water alternating gas. The purpose of these experiments is to study the jet apparatus characteristics at high pressures at the ejector’s intake (0-0.3 MPa), as well as to develop a new calculation methodology for the rheometer. Studies were conducted on a laboratory bench, allowing research at various gas flow rates. The article presents new dependencies for the three possible stand designs that allow recalculation of gas flow. The new rheometer calculation methodology can reduce the inaccuracy from 20% to 1.8%. The results of experiments that, the maximum value of the ejector efficiency is equal to 32.5%, and the injection rate varies from 1 - 1.14, under these experiments conditions. © 2021 Taylor & Francis Group, London.