This has been expanded to cover an additional 400 sq km (154 sq mi) on the west side.
Following theKalimba 1 discovery on the concession in June, Eni decided to accelerate the exploration program and a new four-well campaign is under way.
If this leads to further commercial finds they will be fasttracked for development through the existing infrastructure.
Over the coming months Eni expects cumulative output from the various fields across the block to rise by up to 50,000 boe/d, peaking at 170,000 boe/d early next year.
Block 15/06 is 350 km (217 mi) northwest of Luanda and 130 km (81 mi) west of Soyo in water depths ranging from 200-1,800 m (656-5,905 ft).
The developed fields Sangos, Cinguvu, Mpungi, Ochigufu e Cabaça S.E. are tied back to the FPSOsNgoma and Olombendo, with an overall oil treatment capacity of 200,000 b/d.