Hydration kinetics of oil well cement in the temperature range between 5 and 30°C

Abstract

Modeling the hydration kinetics of oil well cement as a function of temperature is critical for offshore cementing projects related to natural gas hydrates. During this study, the heat release of oil well cement hydration in the temperature range between 5 and 30°C was monitored by isothermal calorimetry. The influence of the source of cement, water-to-cement (w/c) ratio, and CaCl2 on hydration kinetics was evaluated in great detail. Results indicated the temperature effect on cement hydration kinetics can be modeled by a scale factor derived from the apparent activation energy (Ea) of the cement reaction. Ea showed moderate dependence on the cement source and relatively little dependence on the w/c ratio and CaCl2 addition. By combining with previous experimental data, a function correlating Ea and temperature in a wide temperature range (5–87°C) was obtained.

Portland/Sulfoaluminate Cement Blends for the Control of Early Age Hydration and Yield Stress

“…After cement mixing, an induction period occurred, during which its consistency remained constant. Induction time was determined by the intercept of two tangent lines obtained from the heat rate data: one during the induction period and the other during the early stage of the acceleration period [16]. The induction periods of the three cement pastes, P100/0, P0/100, and P93/7 differ (5 h, 2 h, and 1 h, respectively).…”