FIELD: oil, gas and coke-chemical industries.
SUBSTANCE: invention relates to oil and gas industry, namely to technologies of redistribution of filtration flows in bottom-hole zone of injection well. Essence of the invention consists in that the method involves pumping a blocking agent into the bottom-hole formation zone as an emulsion system with nanoparticles of silicon dioxide containing the following, vol. %: diesel fuel or prepared oil from point of preparation and pumping oil - 5–12, emulsifier - 2–3, colloidal nanoparticles of silicon dioxide - 0.25–1.0, water solution of calcium chloride or potassium chloride is balance. Emulsifier used is a composition containing, vol. %: esters of higher unsaturated fatty acids and resin acids - 40–42, amine oxide - 0.7–1, high-molecular organic heat stabilizer - 0.5–1, diesel fuel is the rest. Colloidal nanoparticles of silicon dioxide used are a composition containing the following, vol. %: silicon dioxide - 30–32 in monomethyl ether of propylene glycol - 67–68, water is the rest, or silicon dioxide - 29–31 in isopropanol - 67–69 and methyl alcohol is the rest, or silicon dioxide - 29–31 in ethylene glycol is the rest.
EFFECT: technical result of the invention is increase of technological efficiency of operation of wells, expansion of applicability of a composition in oil-gas-bearing strata, simplification of implementation of the method in conditions of an oil-and-gas producing field, reduction of harmful influence on environment.
1 cl, 5 dwg
