METHOD FOR DEVELOPING DEPOSITS OF EXTRA-HEAVY OIL OR NATURAL BITUMEN Russian patent published in 2021 - IPC E21B43/24 

FIELD: oil industry.

SUBSTANCE: invention relates to the oil industry, in particular to steam-thermal methods for the production of high-viscosity oil and natural bitumen. The method includes drilling a horizontal production well near the bottom of the formation, drilling a horizontal injection well above a horizontal production well parallel to it in a vertical plane at a minimum distance from the roof of the formation, pumping steam into the injection well and taking liquid from the production well. To create a hydrodynamic connection between the producing and injection wells, steam-cyclic well treatments are carried out. When steam is injected into the upper well, liquid is taken from the lower well, and when liquid is taken from the upper well, steam is injected into the lower well, the moment of establishing a hydrodynamic connection between the injection and production wells is fixed, and steam is continuously pumped into the upper injection well and products are taken from the lower production well until the end of the period of production of the displacement element.

EFFECT: oil production increases, the amount of produced water decreases, the steam-oil ratio decreases during the development of deposits, the rate of production of deposits increases.

4 cl, 3 dwg