ENERGY-GAS-FORMING COMPOSITION AND PROCESSING TECHNOLOGY OF BOTTOM-HOLE ZONE OF PRODUCTIVE STRATUM Russian patent published in 2017 - IPC E21B43/24 

FIELD: oil and gas industry.

SUBSTANCE: treatment method of bottom-hole zone of productive stratum comprises separate injection of binary mixture components - energy-gas-forming composition and the combustion initiator - through various channels of double-row lift of pump-compressor tubing joint column and initiation of the heat and gas emission process, energy-gas-forming composition is an aqueous solution containing ammonium salts of strong mineral acids, alkali metal nitrite, a stabiliser for maintaining neutral or alkaline medium - ammonia water, or alkali, or soda ash, or pyridine. Energy-gas-forming composition is pumped by an inner row of pipes, where a fire safety device is mounted above the mixing zone of energy-gas-forming composition and combustion initiator. Energy-gas-forming composition is injected in portions of 0,5-1,5 m³, which are alternated with portions of 0,2-0,5 m³ of 15-20% aqueous urea solution to prevent excessive temperature rise in the reaction zone, formalin or acid are used as the combustion initiator.

EFFECT: removal of paraffin deposits, tar and mud solution residues from the bottom-hole zone of the stratum, increased mobility of oil in the bottom-hole zone, ensuring of failure-free operation.

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