The sale involves 2.8% of Eni's (E) shares and is being conducted through an accelerated book building process.
ExxonMobil (XOM) will retain a 60% working interest in the Masry and Cairo concessions, while QatarEnergy will hold a 40% stake in the agreement.
Lower realized prices for oil-equivalent production hurt W&T Offshore's (WTI) earnings in Q1.