METHOD OF THERMAL GAS FORMATION TREATMENT Russian patent published in 2011 - IPC E21B43/243 

FIELD: oil and gas production.

SUBSTANCE: method includes oxidant injection into a formation through a producing well, cooling fluid injection followed by oil withdrawal. According to the invention, an injected amount of the cooling fluid is specified for being within limits of maximum bottom-hole temperature 100-180°C in oil withdrawal. The cooling fluid is injected immediately after or before a required amount of the oxidant is injected. The cooling fluid injection process starts with injection of a chemical agent decomposed when it is heated with inert gas generation.

EFFECT: more effective and safe thermal gas formation treatment ensured by more efficient use of heat supplied to the formation, reduced total length of treatment, enhanced and improved reliability of the range of products for oil production.

5 cl, 5 ex, 6 dwg