FIELD: oil and gas well building, particularly to perform isolation works in cased wells.
SUBSTANCE: method involves depositing sand column, which closes perforation interval; injecting plugging composition above sand column. The plugging composition comprises aqueous dispersion including fresh water and water-swelling polymeric powder based on water-absorbing polymer. The polymeric powder is taken in amount of 1.5 parts by weight per 100 parts of fresh water. Gel aggregates of water-swelling polymer are added in amount of not more than 5% by fresh water weight.
EFFECT: improved technology of bridge creation.
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RU2286448C2 |
