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
| Title | Year | Author | Number |
|---|---|---|---|
| OIL FIELD DEVELOPMENT METHOD | 2001 |
|
RU2266399C2 |
| METHOD OF OIL PRODUCTION | 2001 |
|
RU2198287C2 |
| METHOD OF DEVELOPMENT OF HIGH-VISCOSITY AND HEAVY OIL DEPOSITS | 1998 |
|
RU2163292C2 |
| METHOD OF INSULATING WASHED HIGH-PERMEABILITY ZONES OF PRODUCTIVE FORMATION | 1998 |
|
RU2136870C1 |
| METHOD OF DEVELOPMENT OF OIL FIELDS | 1998 |
|
RU2136859C1 |
| METHOD FOR INCREASING OIL OUTPUT OF BED | 1997 |
|
RU2125650C1 |
| METHOD FOR OIL-FIELD DEVELOPMENT | 2004 |
|
RU2257463C1 |
| OIL RESERVOIR DEVELOPMENT METHOD | 2003 |
|
RU2302518C2 |
| COMPOSITION FOR ISOLATION OF LOST CIRCULATION ZONES AND SHUTOFF OF FORMATION WATER INFLOWS TO WELL AND METHOD OF COMPOSITION PREPARATION | 1999 |
|
RU2177539C2 |
| METHOD OF OIL DEPOSIT DEVELOPMENT | 2007 |
|
RU2351754C1 |
