BOTTOM WATER ISOLATION METHOD Russian patent published in 2015 - IPC E21B33/13 E21B43/32 C09K8/42 E21B43/27 

FIELD: oil and gas industry.

SUBSTANCE: invention is related to oil and gas producing industry, and namely to isolation of brine water inflow and oriented towards improved efficiency of bottom water isolation at development of oil and gas deposits. The bottom water isolation method includes perforation of production casing within interval of flooded formation, injection of hydrocarbon fluid in order to remove water from bottom-hole zone, hydrochloride acid treatment of the bottom-hole zone in order to increase permeability, flushing of water shutoff compound in order to set a water shutoff screen, reinforcement of the screen with MICRODUR RU solution with sulphacell, setting of a cement plug in the watered interval, testing its strength and hermeticity, washing of the well and development of the formation.

EFFECT: improving bottom water insulation, providing the reduction of water content of wells during development of oil and gas deposits.