In various formulations, microsilica cement slurries are finding increasing utility in oilfield cementing applications. In the course of these applications, many microsilica slurries are being used in environments which subject the set cement to bottom hole static temperatures in excess of 230°F.

While 35% fine silica by weight of cement (BWOC) has been extensively researched and accepted as a high temperature cement stabilizer, very little if any research has been published on the effectiveness of microsilica in this application. The results of this study reveal that microsilica displays promise as a viable alternative stabilizing material, with the added benefit of medium to low slurry density.

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