METHOD FOR RESTORING TIGHTNESS OF PRODUCTION STRINGS

摘要

FIELD: oil and gas production industry. SUBSTANCE: this is aimed at increasing efficiency of oil and gas recovery and reducing periods of repair and insulation operations in reservoirs which are made up of water-bearing sandstone. According to method, injected into untight interval of connecting production strings are soluble glass and water solution of calcium chloride. Injection of aforesaid reagents is performed simultaneously or separately. After that, limiting fringe is built up by injecting appropriate product with subsequent final fixing by injecting cement slurry. EFFECT: higher efficiency. 1 clm