Designed Cements represent Halliburton's continuous advancements in cementing technology driven by more than 90 years of experience with increasingly challenging wellbore conditions. Wellbore conditions vary and the slurry design must account for well depth, bottomhole circulating and static temperature, the type and hydrostatic pressure of the drilling fluid, the potential for lost circulation and/or gas migration among many other influential variables. Designed cements are part of the Designed Cementing Solutions™ systems that provide families of slurries designed for major wellbore-condition challenges facing the industry. Since no single slurry, or family of slurries, is ideal for every well condition, choices allow the optimal solution for each combination of conditions and needs. Cement slurries designed for a given well environment can provide optimal zonal-isolation performance. Good zonal isolation is essential to prevent loss of production, control gas migration, provide protection from corrosive formation waters, reduce water production, and improve confinement of stimulation treatments.