BLOCKING COMPOSITION FOR KILLING WELLS, METHOD OF ITS PREPARATION AND METHOD OF KILLING WELLS USING BLOCKING COMPOSITION Russian patent published in 2024 - IPC C09K8/588 E21B43/12 

FIELD: oil and gas production.

SUBSTANCE: invention relates namely to the technology of killing wells in fields, including those complicated by abnormally low reservoir pressures, as well as other development objects, and can be used for well repairs. A composition for killing wells, represented by a self-destructive polymer of a three-dimensional structure, obtained by mixing a mechanical properties modifier, a monomer, a crosslinker and an initiator in water, and subsequent drying, characterized by a swelling coefficient in water (α) of at least 4 on the first day at a temperature of 40°C and more. The invention also relates to a method for preparing a composition for killing wells and to using a composition for killing wells, in which an inert carrier with a composition for killing wells is pumped into the well.

EFFECT: simplifying the well repair process and increasing the efficiency of well killing in various fields in a wide range of reservoir temperatures (from 40 to 105°C) and various time intervals (depending on the type of well repair) while ensuring high productivity of the process of removing the blocking composition after well repair and reducing the time to bring the well into operation.

34 cl, 2 tbl, 8 ex