| 摘要 |
FIELD: oil production industry, particularly to stimulate oil recovery from non-uniform formation by flooding. ^ SUBSTANCE: method involves successively injecting aqueous emulsion-dispersive system spontaneously formed during dosed reagent distribution into fresh water and injecting aqueous sodium silicate solution having 1-10 mPa.c viscosity and pH less or equal to 13.5. The reagent is 25% solution of non-ionic surfactant solved in aromatic series solvent, for instance in toluol. The reagent is dosed in amount of 0.5-1.0 % by weight. ^ EFFECT: increased oil washing-out and water-tight properties. ^ 2 cl, 1 dwg, 2 tbl |
