METHOD FOR SELECTIVE ISOLATION OF FLOODED INTERVALS OF BED IN WELL

摘要

FIELD: oil and gas production industry. SUBSTANCE: method is used for isolation of highly permeable intervals of bed in wells. In accordance with method, injected into well is solution of polymer which is kept there for certain period of time. Then inorganic acid is delivered into well in amount of 1-1.5 cu.m. Before and after injection of water solution of polymer into well, buffer liquid is delivered into well. Used in function of water solution of polymer is latex, and used in function of buffer liquid is fresh water. Application of method allows for uniform recovery of product from flooded beds which are anisotropic as to permeability. EFFECT: higher efficiency. 3 ex