FIELD: oil and gas industry.
SUBSTANCE: invention relates to gas industry. Essence of the invention consists in the fact that a screening pack is pumped to the bottomhole formation zone, in form of an emulsion-suspension system with colloidal nanoparticles of silicon dioxide containing (vol%): diesel fuel or prepared oil from the point of oil preparation and pumping – 5–12, emulsifier – 2–3, colloidal nanoparticles of silicon dioxide – 1.0–1.5, an aqueous solution of calcium chloride or potassium chloride – the rest. Emulsifier used is a composition containing (vol%): ethers 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 – the rest. Colloidal nanoparticles of silicon dioxide used are a composition containing (vol%): silicon dioxide – 31–32.5 in propylene glycol monomethyl ether – 67–68, water – the rest, or silicon dioxide – 30–31 in isopropanol – 67–68, and methyl alcohol – the rest, or silicon dioxide – 29–31 in ethylene glycol – the rest.
EFFECT: reduction of water content of well product, reduction of harmful effect on environment due to reversibility of blocking effect of screening pack, simplification of method implementation due to single-step technology, possibility to control rheological parameters of screening pack, reduction of labor costs and increase of technological efficiency of gas, gas condensate or gas hydrate wells operation.
1 cl, 5 dwg, 21 ex
