1. Unsupervised outlier detection techniques for well logs and geophysical data2. Unsupervised clustering methods for noninvasive characterization of fracture-induced geomechanical alterations3. Shallow neural networks and classification methods for approximating the subsurface in situ fluid-filled pore size distribution4. Stacked neural network architecture to model themultifrequency conductivity/permittivity responses of subsurface shale formations5. Robust geomechanical characterization by analyzing the performance of shallow-learning regression methods using unsupervised clustering methods6. Index construction, dimensionality reduction, and clustering techniques for the identification of flow units in shale formations suitable for enhanced oil recovery using light-hydrocarbon injection7. Deep neural network architectures to approximate the fluid-filled pore size distributions of subsurface geological formations8. Comparative study of shallow and deep machine learning models for synthesizing in situ NMR T2 distributions9. Noninvasive fracture characterization based on the classification of sonic wave travel times10. Machine learning assisted segmentation of scanning electron microscopy images of organic-rich shales with feature extraction and feature ranking11. Generalization of machine learning assisted segmentation of scanning electron microscopy images of organic-rich shales12. Characterization of subsurface hydrocarbon/water saturation by processing subsurface electromagnetic logs using a modified Levenberg-Marquardt algorithm13. Characterization of subsurface hydrocarbon/water saturation using Markov-chain Monte Carlo stochastic inversion of broadband electromagnetic logs