Аннотация: The cement stone in the conditions of hydrosulphuric aggression can be completely destroyed within a year that can lead to emergence of a number of heavy complications and accidents during the drilling and operation of wells. As a result development of grouting solutions (mixes) permanent to hydrosulphuric aggression, undoubtedly, is a relevant task. Results of theoretical and laboratory researches on an assessment of corrosion resistance of a cement stone in the conditions of hydrosulphuric aggression are presented in article. It is shown that decrease in permeability of a cement stone promotes reduction of intensity of its corrosion by hostile environment. Laboratory researches of sulfate-resistant cement with use of the modern domestic additives reducing water - and gas permeability of a cement stone are conducted. Coefficients of corrosion resistance of a cement stone in the reservoir water containing H2S.