FIELD: oil production by productive bed flooding.
SUBSTANCE: method involves injecting foaming agent, namely aqueous surfactant substance with gelling additive, in the bed through injection wells, wherein the gelling additive increases foam plug stability; injecting gas in the bed. The gelling additive is sodium silicate taken in amount of 10-11% by volume. The gas is supplied in amount enough to convert foaming solution into foam having nominal expansion ratio of 2-5. After water-tight shield creation gas injection is stopped. Foam plug in bed is cyclically formed by repeated successive injection of foaming solution and gas.
EFFECT: increased range of compositions adapted to create water-tight shields in wells to provide injectivity profile conformance control.
2 cl, 1 ex
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