METHOD OF IMPROVING HYDRO-DYNAMIC CONNECTION OF BOREHOLE WITH PAY-OUT BED Russian patent published in 2009 - IPC E21B43/16 E21B43/26 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to oil extracting industry and can be implemented for improving hydro-dynamic connection of borehole with payout bed. The object of the invention is intensification of oil extraction due to increased radius of payout bed drainage, and to increased filtration surface and drainage area of a payout bed. The essence of the invention is as follows: the method consists in hydraulic breakdown of the payout bed by means of installing a packer above the top of the perforated payout bed, in pumping hydraulic breakdown fluid into the under packer zone, in creating pressure of hydraulic breakdown in the under packer zone and in forcing hydraulic breakdown fluid through into a created fracture. According to the invention at first packing of annulus space of the borehole in interval of perforation of the payout bed is performed. Further two or more stretched radial perforated channels in different vertical planes with changes of azimuth at 180° are bored in the payout bed. Also the perforated channels are distanced ones from others at a minimal distance determined by capability of packer installation. Hydraulic breakdown is performed in each perforated channel.

EFFECT: intensification of oil extraction due to increased radius of payout bed drainage, and to increased filtration surface and drainage area of payout bed.

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