Paper: Prevention of Strength Retrogression In High Temperature Well Cements

The decrease of cement strength with increased temperature and age was first reported by oil field related researchers in the early 1950's as a result of the growing trend toward deep well completions. This phenomenon is generally known as "Strength retrogression" and has been an increasingly important problem to consider ever since. Several methods have been employed by service companies to counteract strength retrogression and each will be discussed here in detail.