A Comprehensive Review of Machine Learning Techniques for Facies Classification in Oil and Gas Exploration: Methods, Challenges, and Future Directions. Nigerian Journal of Operations Research, [S. l.], v. 3, n. 2, p. 145–160, 2026. DOI: 10.67868/cq8pt142. Disponível em: https://nijor.org.ng/index.php/nijor/article/view/18. Acesso em: 1 sep. 2026.