FIELD: oil industry, particularly to develop oil fields characterized with high oil viscosity, high displacing water-oil mobility ratio, in the case of circle water flooding in poorly-drained formations where oil mobility is decreased.
SUBSTANCE: method involves serially injecting plug including liquid hydrocarbon fraction, which is oil refinery product and contains aromatic hydrocarbon in amount of not less than 15%, aqueous solution of alkaline agent and sweet water through injection well and producing oil through production well. Above liquid hydrocarbon fraction additionally has corrosion inhibitor, namely bactericide. Liquid hydrocarbon fraction plug, alkaline agent and corrosion inhibitor are supplied in the ratio of from 1:1:0.5 to 1:1:1.5. The plug volume is 0.001-0.05 of summary pore volume in formation to be treated. After injection of above agents the process is stopped for a certain time necessary for agent action. Alkaline agent is liquid glass.
EFFECT: increased efficiency of high-viscosity oil displacement in poorly-drained formations.
1 ex, 1 tbl
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RU2255213C1 |
