DEVELOPMENT METHOD OF HIGH-VISCOSITY OIL DEPOSIT Russian patent published in 2020 - IPC E21B43/24 E21B7/04 E21B47/06 

FIELD: oil, gas and coke-chemical industries.

SUBSTANCE: invention relates to the oil-producing industry. In method of development of high-viscous oil deposit, pressure wells are built horizontal and located above horizontal production wells at the distance excluding heat carrier breakthrough. Pumping of working agent is performed to production wells through one at the initial stage taking into account pressure in other production wells and temperature in pumping injection wells. At pressure increase in nearby production wells by 0.25 MPa and more and temperature in the injection well located above the corresponding production well, pumping to this production well is stopped for the period of energy redistribution. After reduction of pressure in nearby production wells to initial formation steam injection in production well is resumed. After the temperature in the corresponding injection well is increased by 10 °C or more, steam is injected into the injection well and the production well is taken for product extraction. At the same time nearby production wells are transferred for steam injection by control in nearby producers and injection wells, except for transferred pair of wells for injection and extraction, similar to described above until complete injection of all injection wells for steam injection.

EFFECT: technical result is providing uniform warm-up of the deposit, saving energy spent on warming up the deposit, increasing production of high-viscosity oil or bitumen in the deposit.

1 cl, 1 dwg, 1 ex