Cement slurry compositions comprising pozzolanic cement additives and methods for improving development of compressive strengths in the cement slurry compositions

A method for cementing a subterranean well comprising of a borehole, the method comprising:

• preparing a pumpable cement slurry composition comprising:
• at least one cement component comprising cement particles;
• water present at a concentration of at least about 200% by weight of the cement component;
• an aluminosilicate additive component consisting of:
• a first aluminosilicate additive comprising metakaolin and having an amorphous phase of greater than about 50% and a silica to aluminum ratio (Si/Al ratio) of about 1.0 to about 2.5;
• a second aluminosilicate additive comprising rice husk ash;
• and
• at least one cement additive selected from one or more dispersants, at least one antifoam, one or more retarders, one or more accelerators, silica, or at least one combination thereof;
• wherein the first and second aluminosilicate additives are each present at a concentration of about 10% to about 15% by weight of the at least one cement component and comprise a weight ratio of silica to aluminum oxide (Si/Al weight ratio) of about 1.0 to about 2.5, and
• wherein the pumpable cement slurry composition comprises a density of about 10 ppg to about 11.5 ppg and a solid volume fraction of less than about 40%;
• pumping the pumpable cement slurry composition into the subterranean well such that the pumpable cement slurry composition is disposed at or in a zone of the subterranean well;
• and
• allowing the pumpable cement slurry composition to set and form a solid mass in the zone.