TREATMENT METHOD FOR BOTTOMHOLE ZONE OF INJECTION WELL Russian patent published in 2005 - IPC

FIELD: oil production, particularly methods or apparatus for obtaining products from wells.

SUBSTANCE: method involves displacing working agent under elevated pressure and performing curing thereof. For bottomhole zone treatment bath for working agent having 4-6 m³ volume is provided in perforation interval and curing time is up to 9 hours. Working agent is displaced by discharge water in impulse draining mode including pressure increase at well head up to 11-13 MPa and pressure drop operations, wherein number of impulses is 30-50. Then 20-40 m³ of 3-8% hydrochloric acid solution is displaced, curing is performed for not more than 4 hours and discharge water is injected in amount of 20-40 m³.

EFFECT: increased intake capacity of well.

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