METHOD FOR STIMULATING OIL BED HAVING NON-UNIFORM RESERVOIRS

摘要

FIELD: oil production industry. SUBSTANCE: according to method, injected through water injection well is clay suspension with density of 1.02-1.08 g/cm containing 0.05-0.1 mass% of sodium hydrate. After that, injected is water solution of polydimethyldialilammonium and water solution of lignosulfonate. Injection of reagents is effected in fringes of 30-250 m each until injectivity of water injection well is reduced by value not over 50%. Application of aforesaid method results in increasing oil recovery due to additional extraction of oil from washed zones and redistribution of flows at any temperature conditions of oil bed. EFFECT: higher efficiency. 2 cl, 3 tblt