Investigating the Impact of Saudi Kaolinite Particles on Ilmenite-Based Cement

Cementing plays a critical role in maintaining the structural integrity of oil and gas wells by securing the casing to the surrounding formation and preventing fluid migration. The cement slurry is injected into the annular space between the casing and the wellbore, providing support and sealing against formation pressures. Various additives are incorporated to tailor the cement's properties to specific well conditions. This study experimentally investigates the impact of Saudi kaolinite on ilmenite-based heavy-weight oil-well cement, comparing samples with and without kaolinite to assess its effects on viscosity, tensile strength, Young's modulus, and sedimentation. The inclusion of kaolinite reduced viscosity by 56% compared to the baseline cement, enhancing pumpability. Tensile strength increased by 9%, strengthening wellbore stability, while Young's modulus decreased by 20%, improving the cement's flexibility under stress. It also minimized density variation from 2.3% to 0.17%, reducing particle sedimentation. These results highlight kaolinite's ability to enhance the performance of ilmenite-based cement, improving workability, mechanical properties, and long-term durability in demanding wellbore environments.