FIELD: oil production, particularly enhanced recovery methods for obtaining hydrocarbons, namely using heat for viscous oil and bitumen production.
SUBSTANCE: method involves chemically and thermally treating deposit to be developed by obtaining vapor, oil and non-condensed gas mixture in tanks at well head. The mixture has pressure of 30-70 MPa. The mixture includes oil with viscosity not exceeding that of deposit to be developed. Non-condensed gases are nitrogen and carbon dioxide. The obtained mixture is left as it is for mixture cooling up to 147.13°C or lower temperature along with gas-oil mixture dilution. The mixture is injected in deposit to be developed via well in liquid state under gas saturation pressure, which is less or equal to deposit pressure.
EFFECT: increased deposit recovery due to oil viscosity reduction and reservoir energy increase due to dissolved gas drive provision in deposit.
1 dwg
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