FIELD: oil-and-gas production.
SUBSTANCE: group of inventions related to wells completion in underground formation, which provide stimulation and the following insulation of zones stimulated with hydro jets. Essence of invention: in one of the cases it consists of the following stages: (a) perforation of the first zone in underground formation by pumping pressurised fluid medium through out hydro jet device into underground formation in order to generate one of several perforated canals, at the same time hydro jet device to be rotated and/or moved along the well to cut strait or spiral groove in the firs zone of underground formation; (b) pumping disruptive fluid medium into one or several perforation canals in order to create at least one rupture along every perforation canal; (c) blocking at least partly, one or several ruptures in the first zone with a sealing fluid medium; (d) repetition of stages (a) and (b) in the second zone of underground formation. All the other options are modification of the described above.
EFFECT: efficiency increase because of minimising fluid medium losses during the following washing and stimulation of the well.
47 cl, 22 dwg
