METHOD ON INFLOW ISOLATION OF BOTTOM WATER IN WELL Russian patent published in 2015 - IPC E21B43/32 E21B33/138 

FIELD: oil and gas industry.

SUBSTANCE: method on inflow isolation of bottom water in production well, which bottomhole is located near the oil-water contact, includes drilling from the main bore of the radial branches along radius of the necessary length, injection under pressure to these branches of the backfill composition based on Microdur with formation of the water isolation screen, making-up of the injected packing composition by the cement bridge installed in the main bore below level of the radial branches, at that buildup of the cement bridge is ensured after solidification of the packing composition (Microdur), well leaving for the period of cement solidification expectation, and after its solidification additional perforation of the production string of the main bore above the cement bridge, at that for the cement bridge material the packing cement reinforced by the propylene fibres.

EFFECT: increased radius of water isolation screen, and time delay of well water cut.

1 dwg, 2 tbl