METHOD OF EXTRACTION OF HIGH-MOLECULAR RAW MATERIAL OF OIL AND GAS CONDENSATE FIELD Russian patent published in 2014 - IPC E21B43/295 

FIELD: oil and gas industry.

SUBSTANCE: method involves fire action on a field through system of surface wells by ignition of raw hydrocarbons at their opened bottomhole, injection of high-pressure air into deposit, creation of raw hydrocarbon combustion zones in it and active heating of the high-molecular raw material deposit, and consequently, reduction of its viscosity and extraction availability through production wells. According to the invention, a deposit of high-molecular raw material is drilled with vertical wells on the surface, which central one is equipped for ignition of raw hydrocarbon and offset ones removed from the central well to the preselected distance are equipped for high-pressure air injection. At that, on account of reverse-flow forward combustion from the central production well to offsite injection wells, artificial reservoirs of increased drainage capacity are formed. Composition of mixture extracted from the central production well is monitored, and in case if free oxygen found in it is in the amount of over 1%, a source of its occurrence is detected by successive disconnection of the offside vertical injection wells. Consumption of injected air in well - a source of oxygen penetration - is reduced.

EFFECT: creation of fire process of action on heavy hydrocarbons deposit for making reservoirs of increased drainage capacity.

4 cl, 1 ex, 2 dwg