METHOD OF SUBSURFACE FORMATION TREATMENT (VERSIONS) AND MOTOR FUEL PRODUCED BY THIS METHOD Russian patent published in 2013 - IPC E21B43/243 

FIELD: oil and gas industry.

SUBSTANCE: heat is supplied to the first part of subsurface formation, at that at least two heaters are located in heating wells in the above first part; fluids are extracted from one or more production wells in the second part of the formation, at that this part adjoins at least partially the above first part; heat supply is reduced or stopped to the first part when the preset time is over; then oxidising fluid is fed through one or more heating wells in the first part; heat is supplied to the first and second parts in result of oxidisation of at least some amount of hydrocarbons in the first part and movement of fluids heated in result of such oxidisation from the first part to the second one; fluids are withdrawn from at least one production well in the second part, at that produced fluids contain at least some quantity of oxidised hydrocarbons formed in the first part meanwhile high pressure is maintained in the heated part of the formation: at which the added formation fluid has minimum number of compounds with carbon number value more than 8 to provide conditions of pyrolysis of polynuclear hydrocarbon compounds and their quality control as well as prevention of formation falling in the course of its thermal treatment.

EFFECT: increasing efficiency of hydrocarbon production from subsurface formations.

41 cl, 10 dwg