METHOD FOR LIMITING SAND PRODUCTION IN PRODUCTION WELLS Russian patent published in 2022 - IPC E21B43/04 E21B43/24 E21B36/04 C09K8/575 

FIELD: oil and gas production.

SUBSTANCE: invention relates to the field of oil and gas production. In a method for limiting sand production in production wells, which includes pumping a suspension of solid material granules in a liquid into the bottomhole zone of the well and heating the bottomhole formation zone, as the specified suspension, at a temperature below 60°C, a suspension of granules of a fraction of 0.2-5.0 mm of a thermoplastic polymer with a melting point higher than the formation temperature by at least 30°C are pumped. After that, the bottomhole zone is heated to a temperature not exceeding the melting temperature of thermoplastic polymer granules with a water-based coolant or an electric heater and this temperature is maintained for 0.1-2 hours. A copolymer of polyethylene terephthalate and ethylene glycol, or polyethylene, or polyurethane is used as a thermoplastic polymer. with densities less than the density of the water used. one

EFFECT: creation of reliable polymer filters that effectively limit the flow of sand into the well.

1 cl, 1 dwg, 1 tbl