Approximation method for the potential composition of petroleum fractions Larisa Tugashova, Ruslan Bazhenov, Saida Beknazarova, Olga Chuyko and Aleksandr Dimitriev E3S Web Conf., 471 (2024) 03003 Published online: 04 January 2024 DOI: 10.1051/e3sconf/202447103003