Autor(a/res): Mostafa Aboelkheir, Celeste Y. S. Siqueira, Fernando G. Souza Jr., Romildo D. Toledo Filho

Resumo: Flexible cement sheath can eliminate the formation of cracks caused by the thermal recovery in the EOR methods. SBR-modified slurries were fabricated by adding Styrene-Butadiene Rubber (SBR) in latex to the cement matrix. In this article, the influence of this latex on the hydration kinetics of the cement slurry was investigated. SBR (≈83% of Styrene) was added by 6%, 10%, and 13% (V/V) to prepare the slurries and the kinetics in both fresh and hardened states were accompanied by UCA and isothermal calorimetry. The results indicated that in the very early ages of hydration, Ca(OH)2 was consumed by SBR (demulsification phenomenon). A retarding effect was observed and the percolation threshold values were increased by 18.05%, 19.44%, and 27.77% for the SBR-modified slurries, whereas an overall higher accumulated heat could be observed in the isothermal calorimetry curves when compared to the reference slurry.

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