METHOD FOR SELECTIVE BOTTOMHOLE ZONE PROCESSING OF INHOMOGENEOUS STRATIFIED PRODUCTIVE FORMATION Russian patent published in 2016 - IPC E21B43/22 E21B43/27 

FIELD: oil industry.

SUBSTANCE: invention relates to oil production. Method for selective BZP of inhomogeneous stratified productive formation includes the following steps when: geophysical survey in the well is performed; the decision is taken upon the necessity of selective BZP to be performed; in case of positive decision on necessity of selective BZP the number of intervals to be processed (interlayers) is determined; an assembly of at least two packers on a pipe string is lowered into the processed interval; the required interval to be processed and containing an interlayer is isolated by means of two adjacent packers; selective BZP of the required interval is performed; the dual-packers assembly is moved to process the next interval; the processing is stopped when all required intervals to be processed are done; herewith at the stage of making the decision upon the necessity of selective BZP to be performed the maximum tolerable pressure on productive strata is to be determined, between two adjacent packers a filter is installed with a circulation valve, and below the lower of the two adjacent packers a perforated connection pipe and a plug are mounted, so that two processing intervals are done simultaneously.

EFFECT: technical result is the increase of efficiency and success of performing the bottomhole zone processing.

6 cl, 7 dwg