Woodside Petroleum will pay a cut-price sum of $US45 million ($60.6 million) for an additional stake of almost 14 per cent in its $US4.2 billion oil project in Senegal, in a deal that will bring to an end a fractious partnership with cash-strapped explorer FAR Ltd.

The West Australian player's stake in the Sangomar project will rise to 82 per cent as a result of its decision to pre-empt the purchase of FAR's stake by India's ONGC. The deal comes less than four months after Woodside similarly pre-empted a more expensive investment into the project proposed by Russia's Lukoil, which has been targeted by US sanctions.