FIELD: oil industry, particularly methods for stimulating production with the use of eroding chemicals.
SUBSTANCE: method involves injecting acid solution in well bottom zone intervals beginning from remote interval to nearest vertical well bore through flow string. During particular interval treatment flow string end is moved towards interval to be treated. Acid solution and aqueous emulsifier solution are injected in each interval to be treated at rate of 24-35 m3/day and under flow string head pressure of 0.8-1.5 MPa. Then 3 hour technological time-delay is carried out and swabbing operation is performed to reach differential pressure drawdown at well bottom of not less than 3 MPa.
EFFECT: increased efficiency of acid well bottom zone treatment.
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Authors
Dates
2006-06-27—Published
2005-07-18—Filed