METHOD OF DEVELOPMENT OF BITUMINOUS OIL DEPOSIT BY THERMAL ACTION ON FORMATION Russian patent published in 2019 - IPC E21B43/24 E21B7/04 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry. Method of development of deposit of bituminous oil by thermal action on formation includes drilling of injection well with placing in horizontal plane of thermo-injection section in lower part of productive formation and vertical production well. Producing well is located near bottomhole of injection well at distance excluding steam breakthrough. Casing string of the injection well is opened from the roof of the productive stratum to the bottomhole. Horizontal borehole is equipped with process string with outlet at the distance of not less than ¼ of length of horizontal shaft from working face and packer, which isolates annular space of horizontal shaft from annular space of inclined and vertical sections of injection well. Pumping of steam is performed through thermo-injection section – horizontal bore of injection well by pumping steam through process string. Displacement of formation product from inclined and / or vertical sections of injection well is performed by pumping hot water along annular space. Product is extracted by pump from production well. When the product is heated in the production well to the temperature of a possible steam breakthrough, the output of the process string is removed from the bottomhole of the horizontal shaft at a distance which excludes steam breakthrough into the production well. Process string and the packer can be connected by means of a sliding fit with the possibility of shifting the output of the process string in the horizontal shaft of the production well without extracting the packer. As the production of the formation from the production well increases, the separated water produced with the product is used as hot water for displacement from the inclined and / or vertical sections of the injection well.

EFFECT: intensification of oil withdrawal, reduction of time for heating of inter-well space of formation, fast elimination of heat carrier breakthroughs to production well with simultaneous simplification and cost reduction of method implementation.

3 cl, 1 dwg, 1 ex