With Anadarko’s board approving the firm’s $57bn sale to Oxy on 9 May, an $8.8bn side deal for the sale of Anadarko’s African assets to Total enters effect. These include operators’ stakes in two of Algeria’s biggest oil fields.

Two years ago Total’s Algeria production was low and falling. The company’s only stake was 35% of the aging Tin Fouye Tabankort (TFT) wet gas field where output has fallen from a peak of 680mn cfd in 2011 to just 400mn cfd...