THERMOSHAFT METHOD OF DEVELOPMENT OF FRACTURED DEPOSIT OF HIGH-VISCOSITY OIL Russian patent published in 2014 - IPC E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the field of oil-field development and in particular to thermoshaft methods of production of high-viscosity oil. The concept of the invention is as follows: the method includes the penetration through the drilling gallery in the bottom part or below the oil formation, injection of heat carrier and oil withdrawal through underground gently dipping, near-vertical and vertical wells, injection of displacement agent after the formation heating up to the optimum temperature. Meanwhile the gently dipping wells with side tracks alternate with gently dipping wells without side tracks. In the initial period the heat carrier is injected through gently dipping wells without side tracks, and oil withdrawal is performed through the gently dipping wells with side tracks. After heating of the formation up to the optimum temperature the displacement agent is injected through the gently dipping wells with side tracks, and oil withdrawal is performed through the gently dipping wells without side tracks.

EFFECT: decrease of expenses for penetration through mine workings and improvement of the temperature mode in the mine workings is provided.

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