DEVELOPMENT METHOD OF HIGH-VISCOSITY OIL AND BITUMEN DEPOSIT Russian patent published in 2012 - IPC E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: development method of high-viscosity oil and bitumen deposit involves construction of production well with opened-up horizontal section in productive formation and injection well with the profile parallel and similar to that of production well but located above it in the same productive formation, pumping of heat carrier to injection well and extraction of the formation product from production well. Similar and parallel pair of horizontal wells is drilled in productive formation at the distance of 180-200 m. Two lower production wells with horizontal sections parallel to horizontal sections of production wells are uniformly located between production horizontal wells and one upper production well with horizontal section parallel to horizontal sections of injection wells is located between injection wells. Then, all wells are used for pumping of heat carrier in the form of superheated steam till steam-gas chamber is created above injection wells; after that, lower and upper production wells are converted to extraction of the heated product.

EFFECT: increasing production degree of high-viscosity oil reserves, increasing recovery rate of high-viscosity oil due to arrangement of horizontal wells, uniform warm-up of formation by supplying the heat carrier to injection horizontal wells simultaneously with heat carrier supply and horizontal production wells.

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