METHOD FOR WELL TREATMENT Russian patent published in 1995 - IPC

FIELD: mining industry. SUBSTANCE: method for well treatment includes disintegration and dissolving of mud fill due to heating of process solutions and heating of formation in colmatage zone. First, process solution is injected in form of aqueous solution of salt of strong acid of 1.5% concentration at temperature of 70-85 C in volume of pore space; then, in 25-30 min, injected into filter zone is process solution in volume of pore space of treated zone containing sodium poliphosphate, salts of strong acid and water at 70-85 C, and solution is reciprocated in treated zone for 6 h, held in this zone for 8-12 h. EFFECT: higher efficiency. 4 tbl