CEMENT SLURRY COMPOSITION FOR CEMENTING WELLS TRAVERSING SALT FORMATIONS, AND CORRESPONDING CEMENTING METHOD

摘要

The invention is characterized by a specific combination of additives in a salt-laden cement slurry, said additives basically consisting of terpolymers, particularly sulfonated terpolymers, a substance such as NaF, a silicate and a naphthalenesulfonate. The salt-saturated slurry thus obtained is only moderately delayed and affords good fluid loss control. Its rheology and its mechanical properties are not affected.