Effect of high metakaolin content on compressive and shear-bond strengths of oil well cement at 80 °C

This paper reports the effect of high metakaolin content on compressive and shear bond strengths of oil well cement cured at 80 °C. X-ray diffraction (XRD), and thermo gravimetric-differential scanning calorimetry (TG-DSC) used to study cement phases. Both compressive and shear bond strengths increased with hydration age. The binary system with 20% metakaolin displayed better compressive strength relative to the neat oil well cement samples. It increased by 17 and 20% at 3 and 28 days of hydration, respectively. The shear bond strength equally increased by 145 and 56% at 3 and 28 days, respectively. The results of this study, therefore, point to a feasible cement system for the long life of the oil and gas wells.