PROCEDURE FOR WELL KILLING Russian patent published in 2011 - IPC E21B43/12 

Abstract RU 2431736 C1

FIELD: oil and gas production.

SUBSTANCE: procedure consists in pumping gas-liquid mixture into borehole of well, also, mixture is prepared with usage of process water, water-soluble surface active substance and nitrogen, and in pressurising gas-liquid mixture from well borehole completely into bottomhole zone of reservoir with fluid compensating reservoir pressure. Degree of dispersion of gas-liquid mixture and time for conditioning in the bottomhole zone of the reservoir are determined from the condition of formation of structured viscous-elastic spacer zone impermeable for oil and gas between reservoir fluid and the borehole of the well.

EFFECT: raised efficiency and processability of the well killing procedure due to replacement of gas and oil front into depth of bottomhole zone of reservoir and due to gradual self-adaptation and conversion of well to operation mode after repair.

2 cl, 6 ex

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RU 2 431 736 C1

Authors

Erilin Sergej Aleksandrovich

Repin Dmitrij Nikolaevich

Tuktamyshev Damir Khazikarimovich

Dates

2011-10-20Published

2010-04-13Filed