METHOD FOR EXTRACTING HIGH-VISCOSITY OIL FROM FORMATIONS WITH THE PRESENCE OF BOTTOM WATER Russian patent published in 2023 - IPC E21B43/16 

FIELD: high-viscosity oil production.

SUBSTANCE: invention can be used in the oil industry. A method for producing high-viscosity oil from formations with bottom water involves cyclic operation of a well, using it as an injection well for injection of carbon dioxide and as a production well for oil extraction. Carbon dioxide is pumped under injection mode of the well into the bottomhole zone below the water-oil contact, carbon dioxide is moistened when it comes into contact with bottom water, the overlying oil formation is saturated with moistened carbon dioxide, then the supply of carbon dioxide is cut off, the formation is maintained and the well is transferred to the reservoir oil production mode. The direction of movement of reservoir oil is constant from the reservoir to the bottom of the well.

EFFECT: increasing the efficiency of the impact of carbon dioxide introduced into an oil-bearing formation on the production of high-viscosity oil, eliminating the factor of drying out the bottom-hole zone of the well, increasing the productivity and efficiency of its operation.

4 cl, 4 dwg, 5 ex