FIELD: oil production, particularly methods or devices for cementing, for plugging holes, crevices, or the like.
SUBSTANCE: method involves injecting composition containing polyacrylmide, sodium silicate and water in reservoir through well. Solid polyacrylmide is previously treated with 0.3-10 Mrad dose of accelerated electrons. The composition contains 5-15% of polyacrylmide suspended in aqueous sodium silicate solution having density of 1.2-1.5 g/cm3. After above suspension injection water composition is additionally injected in reservoir. The water composition contains soluble calcium or magnesium or aluminum or ammonium salt taken in amount of 3-30% by weight, above polyacrylmide taken in amount of 0.2-2% by weight, remainder is water.
EFFECT: EFFECT: increased water and behind-the-casing flow isolation time.
3 ex
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