METHOD FOR TREATMENT OF RESERVOIR WITH HIGH-VISCOUS OIL BY COMBUSTIBLE AND OXIDISING COMPOSITION Russian patent published in 2015 - IPC E21B43/263 E21B36/02 

FIELD: oil and gas industry.

SUBSTANCE: invention may be used for treatment of reservoir with high-viscous oil by heated gas generated at combustion of liquid combustible and oxidising composition (COC). The method includes running in tubing to the well, injecting combustible and oxidising composition (COC) to the tubing, running in ignition source at a cable to the tubing to COC interval, delivering control signal to the cable and igniting COC. At the wellhead the tubing string is equipped at the bottom with combustion chamber, burner, the first thermal couple with extension cord and above the combustion chamber the tubing string is equipped with a thermal packer and the second thermal couple, the string is run in to the well, at the well mouth the extension cord is connected to the device measuring temperature of both thermal couples, and the thermal packer is set to the well. Through the tubing string an ignition source represented by an electrical flame igniter is run in at a cable to the burner, COC is injected from the wellhead by means of a pump to the tubing with permanent flow rate; when COC reached the burner of the combustion chamber the flame igniter is actuated by delivery of control signal to the cable, COC is flamed in the burner of the combustion chamber and the cable is removed from the tubing. Combustion temperature is controlled within the reservoir treatment interval by the first thermal couple while temperature in annular space over the thermal packer is controlled by the second thermal couple. When combustion temperature increases within treated reservoir interval and/or in annular space above the permitted temperature value within treated reservoir interval and/or temperature destructing the well casing then COC delivery is decreased; when combustion temperature decreases within treated reservoir interval below the permitted temperature value COC delivery is increased on condition that temperature in annular space does not exceed permitted temperature at which the well casing is destructed.

EFFECT: improved reliability of the method implementation.

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