METHOD FOR WELL DEVELOPMENT Russian patent published in 2012 - IPC E21B43/25 E21B43/18 

FIELD: oil and gas industry.

SUBSTANCE: tubing string is installed in a well with arrangement of its bottom below a producing bed by 1-2 m. The well is flushed. An assembly is formed from the tubing string, a sub with a process hole and a hollow-carrier perforator, the assembly is lowered with arrangement of the perforator in the producing bed interval, perforation is carried out, the tubing string is lowered to match the sub process hole with the perforation interval foot. Using the tubing string, 10-20% solution of hydrochloric acid containing 3.5-5% of a surfactant is delivered to the well bottomhole. A pipe valve is opened at the wellhead, and pressure is increased in the tubing string for 1-3 min. until the value is not more than 6 MPa. The pipe valve is closed. The tube valve is opened, and pressure is discharged via the tubular space. Cycles of pressure rising in the tubing string are repeated for 1-3 min, and pressure is discharged via the tubular space until the time interval to achieve the pressure of 6 MPa increases over 3 min. The fluid from the tubing string is squeezed into the bed, and from the tubular space - to the well bottomhole area. The well is put in operation.

EFFECT: increased efficiency of deposits development.

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