Wall Street Journal | OPEC-US Oil Tussle Takes Toll on Nigeria Wall Street Journal LONDON—The escalating duel surrounding U.S. and OPEC oil production has ensnared Nigeria's energy sector, highlighting a challenge for the petroleum cartel ahead of its meeting Friday. The West African nation, a member of the Organization of the ... 4 reasons oil will stay this cheap for years UPDATE 8-Oil drops on high OPEC output, firmer dollar Saudi Arabia's war in Yemen could change OPEC's entire strategy |