DEVELOPMENT METHOD OF HIGH-VISCOSITY OIL AND BITUMEN DEPOSIT Russian patent published in 2013 - IPC E21B43/24 E21B33/138 

FIELD: oil and gas industry.

SUBSTANCE: in the method involving horizontal injection and production wells located one above another the heat carrier is pumped to upper injection well and the formation product is extracted from production well. A section with maximum water saturation degree is pre-determined in the formation, through which a part of horizontal injection well shaft is passed. Then, cyclic extraction of formation fluid and pumping of heat carrier with technological exposure is performed from injection well prior to extraction before warming-up of the deposit, which allows implementing the formation product extraction through production well; at that, injection well is changed over to constant pumping of heat carrier. After the formation product in production well is watered out above allowable value, section with maximum water saturation is isolated by pumping of colmataging hydrophylic composition. After the technological exposure sufficient for curing of colmataging composition, heat carrier pumping is continued through injection well under constant conditions.

EFFECT: shortening of the formation warming-up time, excluding the necessity of heat carrier pumping at high pressure due to passage of horizontal section of injection horizontal well through water-saturated section; reduction of probable breakage of the tubing and casing string.

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