Method for preventing stratal water from breaking through into bottom holes of wells

A method for preventing stratal water from breaking into bottom holes of gas, gas-condensate, or gas-hydrate wells, comprising:

• performing an injection of a shielding agent into a bottomhole formation zone to create a shield impermeable for stratal water filtering into a near-wellbore zone of a productive formation, for which an emulsion-suspension system (ESS) containing colloidal nanoparticles of silicon dioxide is used, the system comprising:
• 5-12 vol % diesel fuel,
• 2-3 vol % emulsifier,
• 1.0-1.5 vol % colloidal nanoparticles of silicon dioxide,
• and the rest of the emulsion-suspension system being an aqueous solution of calcium chloride or potassium chloride,
• wherein the emulsifier comprises:
• 40-42 vol % esters of linoleic or oleic acids,
• 0.7-1 vol % amine oxide,
• 0.5-1 vol % lime-in-diesel fuel suspension or bentonite-in-diesel fuel suspension, and the rest being diesel fuel, and
• wherein the colloidal nanoparticles of silicon dioxide comprise:
• 31-32.5 vol % silicon dioxide in 67-68 vol % propylene glycol monomethyl ether, and the rest being water, or
• 30-31 vol % silicon dioxide in 67-68 vol % isopropanol and the rest being methyl alcohol, or
• 29-31 vol % silicon dioxide in ethylene glycol, and the rest being ethylene glycol.