METHOD SETTING PROFILES OF ACCEPTANCE OF INJECTION WELLS Russian patent published in 2001 - IPC

FIELD: oil production industry. SUBSTANCE: invention specifically refers to change of filtration characteristics, to increase of oil recovery and to reduction of water content of production wells. Method setting profiles of acceptance of injection wells includes injection of solutions of sodium silicate and calcium chloride with formation of compounds of various consistency into pool in two stages. Solutions of sodium silicate and calcium chloride are injected separately, first solution of sodium silicate which includes filling agent is injected at first stage, it additionally includes polyacrylamide at second stage. Wood flour, lignin, bentonite are utilized as filling agent in agreement with method. EFFECT: increased efficiency of action on highly penetrable inhomogeneous and jointing collectors with exception of mud injection into face zone of well. 1 cl, 1 tbl