METHOD OF FORMATION PERMEABILITY CONTROL Russian patent published in 2000 - IPC

FIELD: oil-producing industry, particularly, method of restriction of water inflow into oil and gas wells and equalization of injectivity profile. SUBSTANCE: method includes injection into formation through injection or producing well of emulsion- and gel-forming solutions. In so doing, emulsifying fringe is injected before and after introduction of gel-forming solution with volume ratio from 1:1:1 to 1:2:1. Emulsifying fringe is formed from solution of surfactant in oil. Used as gel-forming solution is mixture of zeolite dissolved in alumochloride and aqueous solution of hydrochloric acid. EFFECT: reduced permeability of flooded highly permeable reservoir and higher profitability of oil production due to use of cheap reagents and simplified process of composition preparation. 3 cl, 2 cl