METHOD OF GAS WELL CONTROL Russian patent published in 2009 - IPC E21B43/12 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to gas-and-oil producing industry, specifically to packer gas well control prior to well workover operation in abnormal low pressure ALP conditions and high in-place permeability. Method of gas well control involves perforation interval suppression by feeding suppressive composition to well bottom and well bore zone through producing string column that is followed by well injection of kill fluids. After suppressive composition is pumped down to well bore zone in behind-the-packer annulus, kill fluids are injected with well left for processing proving and rest-rotation grazing of gas cap at well bottom. Suppressive composition is a solution containing, wt %: sodium chloride 10.0-20.0, polymer Robus G 1.0-1.5, water - the rest. Kill fluids are represented with a solution of density smaller than that of suppressive composition, thus containing, wt %: sodium chloride 6.0-20.0, "ПКР" 6, water - the rest.

EFFECT: higher reliability of packer gas well control in ALP conditions and high in-place permeability.

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