Improving the Rheological and Mechanical Properties of Oil Well Cement Slurries Using Multiple Chemical Admixtures for Enhancing Zonal Isolation: A Laboratory Evaluation

Abstract

The study uses chemical and mineral admixtures to understand the critical processes affecting the cement slurry characteristics, including rheological properties, free water, compressive strength, and thickening time. Using alternate mineral admixtures to replace cement slurry partially has environmental and economic benefits. The mechanisms behind the effects of chemical admixtures on the parameters of cement slurry were investigated at different temperatures using cutting-edge experimental equipment. The binder's compatibility and reactions with chemical admixtures were examined. When temperature and chemical admixtures are combined, it has a major effect on the flow characteristics of slurries. The results suggested that present technical data for chemical admixtures must be confirmed for use in oil well cementing; admixtures that are efficient at raised temperatures in conventional cementing work may become ineffective at elevated temperatures in oil well cementing. Finally, the new mixture can be employed in the desired oil field due to this new material generation (4200–6900 feet and pressure and temperature range of 4100–4800psi and 140–170 °F, respectively). Because this mixture enhances the rheological properties of cement slurry, the end product will be better than the current version. After all, the plastic viscosity, apparent viscosity, and yield stress diagrams of mixture #3*-A are lower than the desired oil field. The other mixtures in this study lead to a decrease in cement slurry viscosity and have the highest compressive strength. Finally, mixture #3*-A was the optimal blend.