MANNER OF WATER AND GAS TREATMENT OF FORMATION Russian patent published in 2002 - IPC

FIELD: oil industry, water and gas treatment with increased oil output. SUBSTANCE: manner includes pumping of water and gas mixture formed by ejector into injection wells and addition of foam-forming surface active substances to water and gas mixture. Water and gas mixture after ejector is forced by pump and content of free gas in mixture across intake of pump is kept in this case not above critical gas content employed in cavitation-free operation of pump with use of water and gas mixture. Content of free gas in mixture across intake of pump is adjusted by change in supply of gas by ejector. Critical content of gas employed in cavitation-free operation of pump with use of water and gas mixture is controlled by change of foam-forming properties of water and gas mixture and/or by change of pressure across intake of pump thanks to change of pressure of water forced into ejector. EFFECT: expanded application field and potential of treatment of oil field thanks to change of discharge pressure of water and gas mixture. 1 cl, 2 dwg