GEL-FORMING COMPOSITION FOR LIMITATION OF WATER INFLUX IN PRODUCTION WELL, ON WHICH STEAM-THERMAL EFFECT IS PERFORMED Russian patent published in 2019 - IPC E21B33/138 C09K8/514 E21B43/22 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to development of oil deposits and can be used in development of oil deposit with non-uniform permeability water-filled formations for limitation of water influx in production well, where steam-thermal action is performed. Gel-forming composition for limitation of water influx in production well, on which steam-thermal action is carried out, including dispersion in water of polyacrylamide and guar, complex cross-linking consisting of chromium acetate and magnesium oxide. Total concentration of polyacrylamide and guar in water is 1 %, with the following ratio of components, wt%: polyacrylamide 0.2–0.49, guar 0.51–0.8, chrome acetate 0.02–0.039, magnesium oxide 0.0167–0.0199, water – the rest.

EFFECT: reduction of water content of extracted product, increase of oil inflow to the well, reduction of load on pump equipment and reduction of power consumption at oil production due to increase of thermal stability and shearing strength of the specified composition.

1 cl, 1 tbl, 2 dwg