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Published online by Cambridge University Press: 17 October 2025
Zeta potential plays a crucial role in determining the wettability and stability of clay particles in porous media, impacting their behavior when interacting with fluids. The present study aimed to address the problem of accurate estimation of zeta potential values for diverse clay particles within various brine samples using advanced machine learning techniques. Methods including decision tree, random forest, adaptive boosting, K-nearest neighbors, convolutional neural networks, and ensemble learning were employed to predict zeta potential based on input parameters such as clay type (kaolinite, chlorite, illite, and smectite), total dissolved solids, pH, and ionic strength. The leverage method was used to identify outliers within the dataset, while a sensitivity analysis quantified the influence of input factors. The training process employed k-fold cross-validation to minimize overfitting. Results revealed adaptive boosting as the most effective approach, achieving high prediction accuracy and minimal error values. Sensitivity analysis identified pH as the dominant factor reducing zeta potential magnitude, while ionic strength and total dissolved solids enhanced zeta potential. The findings contribute significantly to understanding clay–fluid interactions and provide a robust computational framework for industrial applications.