FIELD: oil industry.
SUBSTANCE: group of inventions relates to oil industry, in particular to a method and system of downhole water shutoff. To this end, a method is used, comprising steps of: preparing an insulating composition in an amount greater than internal volume of well from bottom to top of perforated interval. Filling pipe string is lowered into well. Insulating compound is poured into well at least to upper boundary of perforation interval with flushing to formation. Filling pipe string is removed from well. Insulating compound is left to harden. After hardening insulating compound, insulating compound is drilled and formation is opened by sparing well perforation in roof part of formation. Volume of insulating compound is determined using a given mathematical expression.
EFFECT: technical result is high efficiency and reliability of water shutoff in well.
31 cl, 3 dwg
| Title | Year | Author | Number |
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|
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RU2772069C1 |
