METHOD FOR CONVERTING PRODUCING WELL INTO INJECTION WELL Russian patent published in 1999 - IPC

FIELD: oil production industry. SUBSTANCE: according to method, determined is permeability in sections of productive interval. Internal space of well above pump is filled with solvent of asphalt-resin-paraffin depositions. Then, technological pause is undertaken. Well is washed with plugging liquid. Pumping equipment is lifted. Perforation of well and implosive treatment are carried out in sections with low permeability with creation of up to 10 openings per linear meter of perforation interval. Depth of perforation openings is not less than 500 mm. Perforation of well and implosive treatment are performed in sections of high permeability with creation of up to 5 openings per linear meter of perforation interval with depth of perforation openings being not less than 500 mm. Performed after that is thermoimplosive treatment within perforation interval. Application of aforesaid method prevents destruction of casing string and of cement stone in hole clearance. It also ensures levelling of injection profile together with increasing production rate of well. EFFECT: higher efficiency.