LABORATORY INVESTIGATION ON PERFORMANCE OF CEMENT USING DIFFERENT ADDITIVE SCHEMES

The oil/gas well cement quality should be maintained during cementing job in order
to prevent compressive strength retrogression. The previous research indicates that
rheology and compressive strength of the cement slurry is affected by high
temperature high pressure (HPHT) in the wellbore. So, in order to achieve the high
early age compressive strength during the cementing job, different additives such as
silica fame, dispersant and fluid loss control with different concentrations, i.e. silica
fume % BWOC (15, 17, 19 and 21), dispersant Wt% (0.21, 0.26 and 0.31) and 1 Wt%
fluid loss control were used to improve the performance ofthe cement slurry.