The Christophe de Margerie-led company is selling its 15% interest in Block 15/06 to state oil giant Sonangol for $750 million.
Upstream reported in May that Total was in talks to shop the stake, with Sonangol the likely buyer.
Total said the sale is "is in line with (its) global strategy to actively manage its portfolio and focus its investment capability on core assets in which it has more material interests".
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