COMPOUND FOR ISOLATION OF WATER-BEARING BEDS Russian patent published in 1999 - IPC

FIELD: oil and gas production industry. SUBSTANCE: this can be used for isolation or limiting of water inflow to wells and for isolation or limiting of absorbing zones both in terrigenous and in carbonate reservoirs, and also for levelling profile of injectivity in injection wells. Isolating compound has such components as water-soluble polymer of acrylic line, gel-formation regulator, water glass, filler, and water. Used as filler is preliminarily dewatered wood sawdust impregnated with water glass and sawdust impregnated with chloride of trivalent metal such as iron, cobalt, nickel, aluminium, chrome, or of their mixtures. Used for impregnation of sawdust are concentrated solutions of water glass and of chlorides of trivalent metals. Impregnating procedure is carried out immediately after dewatering process that is after drying of sawdust. Application of aforesaid compound improves efficiency in isolation of water inflow to oil and gas wells. EFFECT: higher efficiency. 3 cl