METHOD OF LIMITING WATER INFLUX INTO PRODUCTIVE WELL Russian patent published in 2024 - IPC E21B33/138 E21B43/32 C09K8/508 

FIELD: oil industry.

SUBSTANCE: invention relates to oil industry and can be used to increase oil production in heterogeneous formations by creating insulating screens in flooded zones of high-permeability porous and fractured-porous terrigenous and carbonate reservoirs of injection wells. Method of limiting water influx into a productive well involves pumping a gel-forming polymer-disperse composition into the formation. Composition contains 0.3-1.0 wt.% polyacrylamide, 0.2-0.3 wt.% deflocculant, 3.0-10.0 wt.% inorganic natural fine-fibre magnesium hydrosilicate 3MgO⋅2SiO₂⋅2H₂O, 0.03–0.1 wt.% chromium acetate, water – the rest.

EFFECT: increased efficiency of water influx limitation, expansion of technological capabilities of development of non-uniform oil formations.

1 cl, 2 tbl