WELL OPERATION INTENSIFICATION METHOD Russian patent published in 2014 - IPC E21B43/26 E21B29/10 

FIELD: oil and gas industry.

SUBSTANCE: method comprises test forcing of fracturing fluid and pile of fracturing fluid with proppant, correcting the fracturing project and performing of the main fracturing process. At that the well in the defect area of the production string is equipped with a fly cutter unsupported down the whole and the production string and cemented, the production string is perforated in the stratum interval by the cumulative system with density of 20-30 openings per a running metre at diameter of the perforated openings of at least 20 mm, the flow string with diameter of 89 mm is run in together with the packer and liner with diameter of 89 mm. The packer is set in the production string per 8-30 m above the fly cutter; the liner bottom is placed per 10-30 m above the stratum roof. When hydraulic fracturing is made components are pumped through the flow string and sandy-liquid slurry is pumped in concentration that does not exceed 500 kg/m³, with liquid flow rate from 1.8 up to 2.6 m³/min.

EFFECT: performance of hydraulic fracturing in the well with worn out production string.

2 cl, 1 dwg