DEVELOPMENT METHOD OF SUPER-VISCOUS OIL DEPOSIT Russian patent published in 2019 - IPC E21B43/24 E21B7/04 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to the oil-producing industry. Method for development of high-viscosity oil deposit includes construction within one formation of parallel horizontal wells and separate well located at approximately equal design distance from bottomholes of parallel wells, excluding breakthrough of heat carrier, but allowing to create hydrodynamic connection with all wells, pumping of heat carrier to all wells with formation heating and formation of hydrodynamic connection between parallel wells and separate well, pumping of heat carrier into parallel wells and extraction of products from production well. Separate well is constructed above parallel wells at distance 50±15 m in plan to their faces. Said separate well is equipped with column with couplings arranged at points of intersections in plan with lower horizontal wells. Diameter of couplings is selected proceeding from requirements of steam injection for lower horizontal wells. After the formation is heated and the hydrodynamic connection is created, the parallel wells are transferred to producers for extraction of the product, and the separate well is transferred to the pressure well for pumping of the heat carrier. Pumping of heat carrier is performed at all stages at pressure excluding disturbance of formation rock integrity.

EFFECT: reduction of heat losses due to reduced area of heating and construction of wells considering their hydrodynamic capabilities, increased efficiency of the deposit.

1 cl, 2 dwg, 1 ex