This paper presents the concept of the Storable Slag Slurry, a zonal isolation system which can be prepared in advance, stored and transported to the rigsite at anytime, without setting time concerns.

The compositions contain blast furnace slag to be used in water-based fluids as the hydraulic material, in the absence of set inhibitors. The slurry can be stored in liquid state from 3 days up to several months, at room temperature, depending on its composition.

There are two basic methods of preparing the Storable Slag Slurry. In both it is possible to avoid using the single batch (a so-called batch-mixer) saving money and to maintain good homogeneity of the slurry, and consequently, the uniform physical properties (density, compressive strength, etc.) in all its volume.

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