METHOD OF BITUMEN PRODUCTION FROM UNDERGROUND DEPOSIT Russian patent published in 2008 - IPC E21B43/24 

FIELD: mining.

SUBSTANCE: method involves drilling and commissioning injection well ending with a horizontal site in the deposit, and production well with horizontal site ending in the deposit at the level lower than the injection well, creating permeable area between injection and production wells, injecting heat carrier to the injection well and simultaneous withdrawal of hydrocarbon via the production well. According to the invention, horizontal site of the injection well is oriented towards the production well, its length comprising 95-99% of the distance between the wells. Horizontal site of the production well is oriented towards the injection well and its length comprises 95-99% of the distance between the wells. Then, horizontal sites of each well are consecutively underreamed with a jet nozzle over the whole length, and permeable zone is created between the horizontal sites of injection and production wells by sequential fracturing and injecting horizontal propping agent layer in each horizontal site before the beginning of well operation.

EFFECT: streamlined process and improved deposit production efficiency due to expanded coverage area of underground bitumen deposit.

2 dwg