State petroleum firm Saudi Aramco and France’s Total are firming up their plans for an expansion of their Satorp joint venture refinery and integration of the plant with a petrochemicals complex.

Total chief executive Patrick Pouyanné told his firm’s 2017 earnings call on 8 February that the two firms hope to formally announce the project “in the coming months.”

Mr Pouyanné says the two companies “have the same strategy” of seeking...