METHOD OF FORMATION FRACTURING BY PRESSURE Russian patent published in 2002 - IPC

FIELD: oil producing industry, particularly, methods of formation fracturing by pressure of combustion gaseous products in well stimulation. SUBSTANCE: method includes location of self-ignition pair in region of well perforation. Self-ignition pair consists of oxidizing composition containing aqueous solution of ammonium nitrate and fuel enclosed in sealed container located in volume occupied by oxidizing composition. Contact between oxidizing composition and fuel is provided by rupture of container shell resulting in burning of pair. Fuel is used in the form of lithium and/or sodium aluminohydride or its mixture with lithium and/or sodium boron hydride. Container with fuel is located in well center. Concentration of ammonium nitrate in said solution amounts up to 50-70 wt. %. Container is used in the form of chain of sealed shells. EFFECT: higher explosion proofness in operations involved in formation fracturing by pressure of gaseous combustion products. 2 cl, 1 tbl, 4 ex