ABSTRACT
The effect of the borehole temperature recovery process affects (disturbed by drilling operations) the technology of the casing cementing operations. The design of cement slurries becomes more critical when a casing liner is used because the performance requirements should be simultaneously satisfi ed at the top and at the bottom of the liner. For these reasons it is logical to assume that the bottom-hole shut-in temperature should be considered as parameter in the cement slurry design. In deep wells the actual downhole temperature during cement setting may signifi cantly differ from the mud circulating or from the formation (undisturbed) temperatures. In this chapter we suggest two methods (an empirical equation and the equivalent “API Wellbore” method). An early developed relationship can be used to determine the shut-in temperatures. A fi eld example is presented to demonstrate the calculation procedure.
