Determination of hydrocarbon boundaries based on changes in field strength at two frequenciesViktar Yanushkevich, Yury Grozberg, Iryna Burachonak, Aliaksandr Adamovich and Natallia FedarovichE3S Web Conf., 627 (2025) 01003DOI: https://doi.org/10.1051/e3sconf/202562701003