Use of Non-API Cements for Critical Oil Well Applications

Numerical simulation of the thermomechanical behavior of cement sheath in wells subjected to steam injection

“…The slurry was formulated using standard design practices required to avoid cement strength retrogression. In this case, 40% silica was added to the mixture (Eilers and Root, 1976;Herianto and Fathaddin, 2005;Rogers et al, 2006;Anjos et al, 2011). The effects of three cement slurry formulations on the thermomechanical response are investigated: A standard slurry (SS) formulation, and two others (LS1 and LS2) with the addition of latex.…”

Cement Slurries of Oil Wells Under High Temperature and Pressure: The Effects of the Use of Ceramic Waste and Silica Flour

“…Nevertheless, studies (Anjos et al, 2011;Eilers and Root, 1976;Herianto and Fathaddin, 2005;Rogers et al, 2006) show that cement strength retrogression can be avoided by adding 30-40% of silica based-materials to the mixture. This quantity of silica is sufficient to consume large amounts of calcium hydroxide and reduce the Ca/Si ratio of C-S-H phases from 1.5 to 1.0.…”