PROCEDURE FOR INITIATING HEAT SOURCE IN OIL RESERVOIR Russian patent published in 2011 - IPC E21B43/243 

FIELD: oil and gas production.

SUBSTANCE: procedure consists in preliminary heating bottomhole zone of well with steam and in supply combustible material and air. According to the invention steam and air with oxygen are supplied simultaneously. Conditioning lasts for 24-96 h. Supply and conditioning are repeated several times till there is achieved an intake capacity of the well, which ensures combustible material pumping down at pressure below pressure of reservoir fracture. Successively, combustible material is supplied and heated with steam to temperature of self-ignition and simultaneously there is supplied air till a steady heat source is created. A liquid fraction of pyrolysis of tyres or furnace oil fuel at amount of 1-10 m³ per 1 m of oil saturated thickness of the reservoir are used as combustible material.

EFFECT: reduced negative effect of steam to borehole of well, elimination of fissures withdrawing pumped material into water saturated reservoir.

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