METHOD FOR HIGH-VISCOUS OIL OR BITUMEN FIELD DEVELOPMENT Russian patent published in 2006 - IPC E21B43/24 

FIELD: oil production, particularly to produce oil with the use of heat.

SUBSTANCE: method involves perforating productive bed interval in upper and lower parts thereof; lowering two parallel flow strings with one packer in well; arranging end of the first flow string opposite upper productive bed part; arranging end of the second flow string provided with packer opposite lower part of productive bed; installing packer in interval between perforations of lower and upper productive bed parts. The working agent is steam and hydrocarbon solvent plugs. Working agent injection and product extraction is performed in cycles including injecting working agent through the first flow string in upper productive bed part along with closing the second flow string without product production; extracting product through the second flow string from lower productive bed part along with closing the first flow string without working agent injection. Above cycles are repeated.

EFFECT: increased oil output.

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