FIELD: oil and gas extracting industry. SUBSTANCE: method includes wells examination and later supplying water-sealing compounds into layer, said compounds having selective penetrative capabilities. On basis of wells examination amount of cracks in extraction area and amount of space behind column which is free of hydrated cement are determined. Then, amount of cement mortar sufficient for filling said spaces and cracks in the layer is supplied into the well. Water-sealing compounds are supplied after mortar solidification and perforation of watered layer portions. After supplying water-sealing compounds for their reinforcement cement mortar is pumped again. Well is placed in operation after repetitive punching of productive layer portions. Mortar may also include plasticizers and water discharge lessening compounds. EFFECT: increased effectiveness of isolating water influx in extracting wells and cracked collectors. 2 cl
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