Total SA is positioning itself as Angola’s top foreign operator in the country’s efforts to revive oil production from the lowest level in more than a decade. The French energy giant could one day operate about 40% of the nation’s production, and is considering an additional investment of as much as $10 billion, according to Chief Executive Officer Patrick Pouyanne. That gives the company a decisive role in what’s become a major issue in Angola’s domestic politics as President Joao Lourenco vows to reverse economic problems caused by the industry’s decline. “Angola is one of the most import...