METHOD OF HIGH-VISCOSITY OIL AND BITUMEN DEPOSITS DEVELOPMENT Russian patent published in 2016 - IPC E21B43/247 E21B7/04 

FIELD: oil industry.

SUBSTANCE: invention relates to oil and gas industry and is intended for development of high-viscosity oil and bitumen deposits by heating. Technical result is increase of efficiency of deposit heating, increased coverage of deposit heating, higher volumes of extraction of oil and bitumen, reliability of the method. Method of high-viscosity oil and bitumen deposit development includes drilling of two process wells and one production well with horizontal shafts, installation of electrodes in horizontal shafts of process wells, connection of electrodes to electric substation at wellhead, placing of electric centrifugal pump in the horizontal shaft of production well, heating of the deposit with electric current with the help of electrodes installed in horizontal shafts of process wells, extraction of heated oil and bitumen from deposit by electric centrifugal pump from horizontal shaft of production well. Initially at least one production well and one heating well with horizontal shafts are drilled arranged in parallel to each other at distance of 15 m. Then in the upper horizontal shaft of the heating well hydraulic fracturing is performed with formation of longitudinal cracks and attachment of current-conducting material. Then, perpendicular to the initial section of horizontal shaft of heating well first process well with horizontal shaft is drilled, and perpendicular to the end section of horizontal shaft of the heating well second process well with horizontal shaft is drilled, wherein, horizontal shafts of process wells are placed within the limits of cracks of hydraulic fracturing of formation. Then between process wells parallel to their vertical shafts and perpendicular to their horizontal shafts of heating and production wells two additional production wells are drilled. Horizontal shafts of additional production wells are arranged in parallel and between the upper and lower horizontal shafts of heating and production wells. Pump string rods are used as electrodes. Lower horizontal shaft of production well and horizontal shafts of the additional production wells are equiped with electric-centrifugal pumps. Deposit is heated by means of upper horizontal shaft of heating well, and heated oil and bitumen are extracted by electric centrifugal pumps through the lower horizontal shaft of production well and horizontal shafts of additional production wells.

EFFECT: proposed method of development increases efficiency of heating of high-viscosity oil and bitumen, simplifies technological process of method implementation, increases coverage of deposit heating, increases volume of heated oil and bitumen extraction, reliability of method implementation.

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