TREATMENT METHOD FOR WELL BOTTOM ZONE HAVING INJECTIVITY CLOSE TO ZERO Russian patent published in 2006 - IPC E21B43/27 

Abstract RU 2268361 C1

FIELD: oil industry, particularly enhanced recovery methods for obtaining hydrocarbons.

SUBSTANCE: method involves determining rate, at which well is able to take medium, wherein the rate determination is performed when pressure is below formation bursting pressure; injecting portion of processing medium, namely hydrochloric acid solution, in the well at above rate; increasing the rate and reducing pressure to minimal pressure value, which maintains well ability to take medium and injecting the remainder portion of processing medium.

EFFECT: increased well output due to provision of processing medium injection in well bottom zone.

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RU 2 268 361 C1

Authors

Ibragimov Nail' Gabdulbarievich

Sharikov Gennadij Nesterovich

Kormishin Evgenij Grigor'Evich

Isakov Vladimir Sergeevich

Dates

2006-01-20Published

2004-11-30Filed