METHOD FOR PREVENTING CORROSION CAUSED BY SULFATE-RESTORING BACTERIA Russian patent published in 2004 - IPC

FIELD: oil extraction industry.

SUBSTANCE: method includes determination of area of active biocoenosis of sulfate-restoring bacteria along the well, determination of bactericide solution amount needed for suppression of sulfate-restoring bacteria vital functions, feeding of bactericide solution into bed through the well and its stopping for duration needed for full suppression of sulfate-restoring bacteria vital functions, launch of stopped well into operation. Feeding of bactericide solution prepared in water of high denseness is performed through operational oil extracting well, on exit of which pipes corrosion caused by sulfate-restoring bacteria is detected, by its feeding at atmospheric pressure into behind-pip space of well in specified amount. While well operation is stopped, used solution of bactericide is additionally fed into behind-pipe space, for saturation of sulfate-restoring bacteria active bioceonosis area in pit-face adjacent area of well. Saturated pit-face adjacent area of well is used as reservoir for keeping and using bactericide in output line during operation of said well, then behind-pipe space is covered.

EFFECT: protection from corrosion in oil collecting and processing systems.

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