FIELD: isolating jobs; applicable for increase of formation oil recovery in operation of oil wells under conditions of waterflooding. SUBSTANCE: method includes injection into formation of portions of plugging material in the form of gel-forming compositions with different rheological characteristics. Gel-forming compositions are based on polymer - polyacrylamide absorbed by formation rocks, dispersions of colmatage compositions with different sizes of disperse phase particles with subsequent, after plugging, treatment of bottom-hole formation zone with decolmatage composition. Colmatage compositions are used with sizes of particles of disperse phase not filtering through relatively low-permeability porous part of treated formation and are included into the first portion of gel-forming compositions and decolmatage composition includes agents dissolving polymer, gel and colmatant. EFFECT: higher oil recovery from formation due to increased coverage of formations by waterflooding. 4 ex
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