INDENTIFICATION OF THE PATTERN FOLLOWED BY THE DESTRUCTIVE PROCESSES CAUSED BY THE FLUID'S CORROSION ACTIVITY WITHIN THE BOREHOLE CEMENT SHEATH
Today, the highest concentration of hydrocarbons is in the oil and gas fields with a considerable amount of hydrogen disulfide, e.g. they are Kashagan with up to 19 per cent, Astrakhan gas-condensate field with up to 22 per cent. Hydrogen disulfide is a corrosion active agent relative to all borehole materials, including the cement sheath. That is why it is crucial to improve die corrosion resistance of oil and gas borehole grouting mixtures.