Monday, May 18, 2020

Can the Fly Ash, Metakaolin and Silica Flour in Light-Wellbore Cement Slurries Prevent Alkali-Silica Reactivity of Glass Microspheres?

Cementing is a required process for drilling and completing any types of wellbores, those producing geo-fluids, or used for injection of waste fluids. The cementing process is completed by pumping the cement down through a casing string, then back up between the formation and casing where the cement forms bonds between the two and seals off fluid flow in this area. The hydrated cement slurries used in the wellbore construction are expected to maintain their integrity throughout the life span of the well, often at high temperatures and pressures as well as being exposed to geochemically aggressive fluids. Loss in cement integrity can lead to fluid migration through the cement, as well as structural issues that result in costly workovers during service life of the well, and would increase complexity of permanent plugging and abandonment of the well as well. 

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