METHOD OF BUTTOMHOLE ZONE TREATMENT Russian patent published in 2003 - IPC

FIELD: oil producing industry; applicable in bottomhole zone treatment. SUBSTANCE: method includes supply of acid solution to perforation and forcing into bottomhole zone of acid solution heated by combustion of powder charge. Acid solution is supplied to perforation interval by killing fluid with density equal to or somewhat less than density of acid solution. Forcing into bottomhole zone of heated acid solution is effected also by killing fluid equal to or somewhat less than density of acid solution. Killing fluid is based on salts of used acid. EFFECT: higher efficiency of bottomhole zone treatment due to preservation of acid solution activity. 2 cl, 2 ex