Thermal maturity and gas generation in Upper Cretaceous formations of the Beni Suef Basin, Egypt: insights from stable carbon isotopes and geochemical analysis of the Azhar-E1X well - Farouk, Sherif; Saada, Saada Ahmed; Arafat, Mohamed; Al-Kahtany, Khaled; Gentzis, Thomas; Zaky, Amr Said; Jovane, Luigi (Frontiers in Earth Science (Lausane), 2025)