METHOD FOR HYDRAULIC RESERVOIR FRACTURING Russian patent published in 2007 - IPC E21B43/26 

FIELD: oil and gas industry, particularly hydraulic reservoir fracturing.

SUBSTANCE: method involves penetrating reservoir with vertical or inclined well; installing hydraulic monitor device provided with jet nozzle set in well within predetermined interval; injecting working liquid through jet nozzle set of the device in reservoir for cavern creation in reservoir and for following reservoir fracturing from caverns by pressure caused by jet braking inside caverns. Hydraulic monitor device provided with jet nozzles grouped in two rows spaced 180° apart is used. Jet nozzle pitch in each row is not more than two casing pipe diameters. Hydraulic monitor device is turned through predetermined angle to change direction of next fissure propagation. Fissures are created under casing pipe pressure less than side rock pressure. The working liquid is allied to reservoir fluid.

EFFECT: increased producing ability of wells due to creation of a number of crossing fissures in well bore, provision of predetermined azimuth fissure direction and minimized of fissure surface plastering.

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