Investigation of Performance of Nano Silica Cement Additive on Sulphate Attack In Geothermal Wells

Purpose: This research was intended to evaluate Nano silica as an additive improve the sulphate resistance of cement used in geothermal wells.
 Design/ Methodology/ Approach: Sulphate determined by measuring longitudinal change cube specimens that were cured sodium solution for 21 days. Cube with varied concentrations (0%, 0.3%, 0.6%, 0.9% and 1.2%) study. Five separate solutions maintained at 23℃, 40℃, 65℃, 70℃ 80℃ Final length measurements taken compared a percentage initial measurements.
 Findings: Beyond improved each concentration replacement. Control 0% had most inferior performance all temperatures. Higher 1.2% 0.6% replacement gave between 23℃ 65℃. A lower 0.3% proved more suitable 65℃ 80℃.
 Research limitation: The results experiment indicate low-temperature Practical implications: application this can durability strength cement, reducing potential degradation due exposure sulphates. lead longer lifespan well, maintenance costs increasing its overall efficiency.
 Social Improved designs create longer-lasting sheaths be developed from research, thereby fostering energy development. option replace certain volumes contributes reduction carbon footprint minimising demand for, therefore production cement. 
 Originality/ Value/ Novelty: Previous tested high temperatures analysed mechanical resistance. examined