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Sustainable Cementing Solution by Optimizing Ilmenite-Based Cement with Tire Waste for HPHT Environments
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DOI：10.1016/j.petlm.2026.05.009.png)
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Abstract
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Cementing is essential for maintaining wellbore integrity, but high-pressure, high-temperature (HPHT) reservoirs can compromise the stability of conventional cement formulations. Ilmenite is commonly used as a weighting material to increase cement density for HPHT applications. However, it can cause particle settling and affect other slurry and hardened-cement properties. This study evaluated the effect of tire-waste powder on ilmenite-based cement, with emphasis on rheology, compressive and tensile strength, dynamic Young’s modulus, dynamic Poisson’s ratio, porosity, and particle settling assessed through density variation and computed tomography (CT) scans. Results showed that a low dosage of tire-waste powder improved both fresh and hardened properties of high-density ilmenite-based cement. After screening 0-4% tire waste by weight of cement (BWOC) for rheological performance, 2% BWOC was selected for detailed characterization. At this dosage, slurry fluidity improved, with plastic viscosity decreasing by 59%, yield point increasing by 28%, and 10-second gel strength increasing by 124%. The 2% dosage also increased compressive strength by 58% and tensile strength by 9%, indicating a more durable cement sheath. Ultrasonic measurements showed a 17.5% reduction in dynamic Young’s modulus and a 32% increase in dynamic Poisson’s ratio, suggesting improved wellbore stability. Porosity decreased by 4%, indicating enhanced sealing performance. Density-variation testing and CT-based analysis further confirmed a more homogeneous density distribution, with a low density variation of 0.5%. These findings support the use of tire waste as a performance-enhancing additive for heavy-weight HPHT cementing systems while valorizing an end-of-life waste stream.
Keywords:
Oil well cement
tire waste
ilmenite
HPHT
cement properties
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