METHOD FOR EFFICIENCY IMPROVEMENT IN INJECTION AND INTENSIFICATION OF OIL AND GAS PRODUCTION Russian patent published in 2015 - IPC E21B43/116 E21B43/263 

FIELD: oil and gas industry.

SUBSTANCE: well perforation method consists in loading of reactive shaped charge to the case, at that reactive shaped charge includes reactive barrel with components selected of metals and metal oxides; running down of the case with charge to the wellbore and placement close to underground stratum; explosion of shaped charge in order to initiate the first and second explosions, at that the first explosion creates a perforated tunnel in the adjoining stratum, and this perforated stratum has breakage zone placed along its walls while the second explosion is initiated by the first explosion and created by exothermal intermetallic reaction between the reactive components of the shaped charge barrel. The second explosion expels fragmentary material from the breakage zone inside the perforated tunnel to the wellbore and leads to at least one fracturing at the end of perforated tunnel, and at least one fracturing includes fracturing of the stratum containing hydrocarbons and is connected to inner part of the perforated tunnel; and injection of fluid containing propping agent to the perforated tunnel under pressure sufficient for penetration of injected fluid to at least one fracturing at the end of the perforated tunnel so that propping agent is introduced there and at least one fracturing of the stratum is maintained open in order to increase yield of hydrocarbons.

EFFECT: increased injection efficiency and intensification of oil and gas production from underground stratum.

8 cl, 20 dwg, 1 tbl