FIELD: mining.
SUBSTANCE: invention can be applied at development of oil deposits at late stage of development an also for increased oil withdrawal of formations at development of deposits with high level of watering. The method of applying modified polymer compositions to increase oil withdrawal of formations consists in pumping water solution of polyacrylamide and chromium acetate into the formation; the said solution is prepared on formation water with addition of caustic soda to pH=8.0 and additional with acidic sodium carbonate at amount of 2.48 wt % and dosing of polyacrylamide at amount of 1.33 wt % and chromium acetate at amount of 0.47 wt %.
EFFECT: increased hardness of gel, reduced time for gel forming.
5 tbl
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| METHOD OF CONTROLLING PROFILE LOG OF INJECTION WELL AND RESTRICTING WATER INFLUX IN PRODUCTION WELL | 2007 |
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| METHOD FOR DEVELOPMENT OF FLOODED OIL RESERVOIR WITH NON-UNIFORM PERMEABILITY | 2019 |
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| METHOD OF SELECTIVE WATER SHUT-OFF WITHIN PRODUCING OIL WELLS | 2007 |
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RU2348792C1 |
| THERMOTROPIC GEL-FORMING COMPOSITION | 2009 |
|
RU2406746C1 |
