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Study the elastic properties and the anisotropy of rocks using different machine learning methods


Tuan Nguyen-Sy, Quy-Dong To, Minh-Ngoc Vu, The-Duong Nguyen, Thoi-Trung Nguyen

Source title: 
Geophysical Prospecting, 2020 (ISI)
Academic year of acceptance: 

This paper aims to demonstrate that the elastic stiffnesses and the anisotropic parameters of rocks can be accurately predicted from geophysical features such as the porosity, the density, the compression stress, the pore pressure and the burial depth using relevant machine learning methods. It also suggests that the extreme gradient boosting method is the best method for this purpose. It is more accurate, extremely faster to train and more robust than the artificial neural networks and the support vector machine methods. Very high R-squared scores was obtained for the predicted elastic stiffnesses of a relevant dataset that is available in the literature. This dataset contains different types of rocks, and the values of the features are in large ranges. An optimal set of parameters was obtained by considering an appropriate sensitivity analysis. The optimized model is very easy to implement in Python for practical applications.