FIELD: mining.
SUBSTANCE: invention relates to compositions for use in cementing underground wells containing water, inorganic cement and one or more particulate materials which swell when in contact with a water-immiscible fluid. Cements can additionally contain a water-immiscible fluid. Such cements are intended for sealing micro-gaps caused by presence of water-immiscible fluids on surfaces of casing string, surfaces of borehole walls, or in both cases. In addition, the invention also relates to a method of cementing underground wells.
EFFECT: technical result is higher quality of cementing and productivity of well.
20 cl, 2 dwg, 2 tbl, 4 ex
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