METHOD OF RESTRICTION OF WATER INFLUX TO WELL

摘要

methods of restriction of water inflow to oil producing wells; applicable in regulation of injectivity profile of water injection wells. SUBSTANCE: method includes successive injection of mixture of 1-3% solution of hydrochloric acid with 1-1.5% solution of sodium silicate at pH of mixture from 1.5 to 2. After injection of said mixture, 30-50% solution of sodium silicate is injected in amount sufficient for increase of mixture pH to 5-8. EFFECT: higher efficiency of method due to formation under formation conditions of gel-forming fringe with high structural and mechanical properties. 2 cl, 1 dwg, 2 tbl, 1 ex