Italian oil firm Eni today announced a major discovery off Angola.
The Agogo discovery is thought to hold 450-650 million barrels of oil.
The well was drilled by the Poseidon drillship.
Agogo follows other commercial discoveries at Kalimba and Afoxé.
Eni operates the block with a 36.8% stake.
Its partners are Sonangol and SSI Fifteen.