METHOD FOR HYDRAULIC FRACTURING OF RESERVOIR IN GAS WELL Russian patent published in 2007 - IPC E21B43/26 

FIELD: oil and gas industry, particularly to stimulate hydrocarbon influx in gas and gas condensate wells.

SUBSTANCE: method involves killing well, remanifolding well head; removing production tubing from well; lowering pipe string provided with high-pressure packer in well; remanifolding well head; setting packer; performing hydraulic fracturing of reservoir; remanifolding well head; detaching and removing high-pressure packer; lowering production string in well; remanifolding well head and developing well. Pipe string is additionally provided with circulation valve arranged over packer and is suspended to pendant pipe fastened over preventer plant. Reservoir fracturing is performed when preventer plant is arranged at well head. After hydraulic fracturing of reservoir before packer detachment and removal plugging liquid is injected in productive reservoir interval, circulation valve is removed and hole clearance is filled with killing liquid having necessary density. Then at least of two liquid circulation cycles are carried out.

EFFECT: decreased assemblage work time before hydraulic reservoir fracturing and after the fracturing, liquidation of secondary bottomhole reservoir zone contamination and increased safety of high-pressure packer removal from well.

2 dwg