FIELD: oil-and-gas industry.
SUBSTANCE: proposed method comprises cyclic pumping blocking composition into formation. Said composition is base on liquid-phase polymer solution in fluid not causing swelling. Then pumping is interrupted. At the beginning of every cycle, water is slugged in amount of 5 to 20% of the blocking composition volume, composition is pumped at pressure 1.1 to 2.1 times higher that formation pressure. At the end of every cycle, pressure is reduced to formation pressure and soaking is carried out for period equal to preset blocking composition gellation time in formation conditions.
EFFECT: higher efficiency of formation absorption isolation in both terrigenous and carbonate reservoirs and leveling injection capacity.
2 tbl
| Title | Year | Author | Number |
|---|---|---|---|
| COMPOSITION TO BLOCK WATER PRODUCING FORMATION | 2007 |
|
RU2391487C2 |
| METHOD OF ISOLATION OF WATER-ENCROACHED OIL RESERVOIRS | 1999 |
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| USING TITANIUM COAGULANT FOR TREATMENT OF WATER-FLOODED OIL RESERVOIR | 2015 |
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| METHOD OF OIL POOL DEVELOPMENT | 2001 |
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| METHOD OF EQUALIZATION OF INJECTIVITY PROFILE IN INJECTION WELLS AND RESTRICTION OF WATER INFLOWS TO PRODUCING WELLS | 2000 |
|
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| METHOD OF OIL DEPOSIT DEVELOPMENT | 2001 |
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| INSULATION METHOD OF FORMATION WATER INFLOW AND LINING METHOD OF BOTTOM-HOLE FORMATION ZONE | 2013 |
|
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| METHOD FOR UNIFORM EXTRACTION STRATIFIED RESERVOIR | 2015 |
|
RU2597596C1 |
| WATER SURROUNDED PETROLEUM COLLECTORS ISOLATION METHOD | 2002 |
|
RU2224101C2 |
| METHOD FOR DOING REPAIR-ISOLATION WORKS UNDER CONDITIONS OF INTENSE ABSORPTION | 2009 |
|
RU2405926C1 |
