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Currently, thermal methods of enhanced oil recovery (EOR) based on the use of steam-thermal effects, steam cyclic treatment of the bottom-hole zone, hot water injection, steam, and in-situ combustion are the most effective in the development of high-viscous oil fields. Steam injection becomes impossible for the fields that are located deeper than 1200-1300 m with a pressure higher than 10 MPa due to the phase state of water-steam, therefore, thermal treatment is carried out by hot water. The present study was cond...