FIELD: oil and gas industry.
SUBSTANCE: method for reinforcement of a bottom-hole zone and prevention of sand carry-over from a well involves pumping to the well of polyurethane pre-polymer. Before polyurethane pre-polymer is pumped to the well, isopropyl alcohol is pumped, and after pre-polymer is pumped, buffer marketable Devonian oil is pumped and forced-through with water with density of 1000-1200 kg/m3. At that, forcing-through is performed at maximum allowable speed for formation of a polymer film fixing sand grains of the bottom-hole zone.
EFFECT: invention allows increasing the time of absence of polyurethane pre-polymer contact with water, which allows providing the required treatment radius of the formation bottom-hole zone, increasing sand fixing ability of the compound at maintaining permeability and productivity of the oil formation.
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