HYDROCARBON EXTRACTION METHOD Russian patent published in 2010 - IPC E21B43/243 

FIELD: oil and gas industry.

SUBSTANCE: hydraulic jet perforation is performed in production well, disengaging gear - packer and check valves are installed, oxidiser is pumped and heat treatment of bottomhole zone of the formation in which the formation fluid is extracted prior to the work beginning is performed. There determined is temperature of the beginning of liquid-phase oxidation and temperature of coke formation, there opened is productive formation and installed is hydrodynamic connection to the formation by means of hydraulic jet perforation in two intervals of productive formation - lower and upper one. Disengaging gear is installed between holes of lower and upper intervals of hydraulic jet perforation. Lower check valve opening to the outside is arranged in flow column below the disengaging gear, and upper check valve opening to the inside of cavity of tubing - above disengaging gear. After that lower part of bottomhole formation zone is heated up to temperature of the beginning of liquid-phase oxidation of hydrocarbons of formation fluid and together with it and/or after it there supplied is oxidiser to lower part of bottomhole formation zone along flow column through lower check valve and lower holes of hydraulic jet perforation. Hydrocarbons of formation fluid are heated up to temperature of coke formation, and development of the well and extraction of products from it after oxidation reactions are completed in the formation is performed through upper holes of hydraulic jet perforation, upper check valve and cavity of flow column.

EFFECT: increasing the efficiency of the extraction process of hydrocarbons from the well.