FIELD: gas extracting industry. SUBSTANCE: method includes geophysical research, string perforation and pumping of sealing compound, at a temperature of 80-90 centigrade, containing bentonitic clay powder, and additionally containing emulsifier-phosphatide concentrate at following ratio of components in percents of mass: bentonitic clay powder - 50, emulsifier-phosphatide concentrate - 50, under pressure through perforated openings into zone of gas cross-flow. EFFECT: increased stability duration, increased heat resistance and increased adhesion of sealing compound with surfaces of pores, cracks and so on and, due to that, increased period between maintenance of gas underground storage wells.
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