COMBUSTIBLE OXIDIZING COMPOSITION FOR THERMOCHEMICAL TREATMENT OF OIL FORMATION Russian patent published in 2002 - IPC

FIELD: oil producing industry. SUBSTANCE: combustible-oxidizing composition includes saltpeter and product of reaction of nitric acid and organic compound. Organic compound is used in the form of at least one compound of the following group: alkanolamine, alkylamine, alkylpolyamine with 2-6 carbon atoms. Reaction production has pH of medium equal to 5.0-8.0. Combustible-oxidizing composition has the following ratio of components, mas.%: saltpeter, 2.0-35.0; reaction production, the balance. Composition has saltpeter in the form of ammonium nitrate, potassium nitrate, sodium nitrate or calcium nitrate, preferably, ammonium nitrate, and also ethanolamine and/or ethylamine with 2-3 carbon atoms, 2, preferably. Alkylpolyamine has at least 2 amino groups, 3, preferably. Organic compound is used in the from of aqueous solution containing at least 80% of main substance. Composition may additionally have special-purpose additive selected from a group including potassium permanganate, isopropylmetacarboran, acetic acid in amount not more 3% of initial component weight. Said composition may be used for activation or restoration of oil well operation whose productivity is reduced due to paraffin-hydrate and asphalt-resinous accumulations clogging filtration channels and distributing communication of well with fluid-carrying formation. Technical result consists in higher fire and explosion safety in operation of said composition under any weather conditions, increased formation oil recovery, reduced degree of disturbance of casing and tubing strings, provision of controlled pressure in treatment of wells of any depth and complexity. EFFECT: higher efficiency. 10 cl, 1 tbl