FIELD: oil and gas industry.
SUBSTANCE: invention relates to oil industry. Essence of the invention consists in the fact that the method involves sequentially injecting into the bottomhole formation zone of the active pack and the drilling fluid. As an active pack, an emulsion system containing (v/v%) is used: diesel fuel or prepared oil from the point of preparation and pumping of oil – 15–30, emulsifier – 2–3, a colloidal solution of hydrophobic silica nanoparticles – 0.5–1, an aqueous solution of calcium chloride or potassium chloride – the rest. In this case, a colloidal solution of hydrophobic nanoparticles of silica can contain, v/v: amorphous silica – 30–32.5, propylene glycol monomethyl ether – 67–69, water is the rest. As a drilling fluid, an aqueous solution of calcium chloride or potassium chloride is used with the addition of a water-repellent agent of the mark "IVV-1" or "HR-M" of 1–2 vol.%. As an emulsifier, a composition of the following composition (v/v%) can be used: esters of higher unsaturated fatty acids (linoleic, oleic, linolenic) and resin acids – 40–42, amine oxide 0.7–1, high molecular weight organic heat stabilizer – 0.5–1, diesel fuel (summer or winter) – the rest.
EFFECT: increasing the effectiveness of geological and technical measures to suppress oil and gas wells, high thermal stability and aggregative stability of the emulsion system for damping wells, as well as the ability to regulate the surface-active properties and viscosity of the emulsion system, depending on the filtration-capacitive and geological-physical characteristics of the bottomhole formation zone.
1 cl, 11 ex, 5 dwg
