*The headquarters of the Organisation of Petroleum exporting Countries, OPEC, Vienna, Austria. 27 April 2017, Sweetcrude, Vienna, Austria — The price...

*OPEC headquarters, Vienna, Austria. 26 April 2017, Sweetcrude, Vienna, Austria — The price of OPEC basket of thirteen crudes stood at $49.21 a barrel...

*The Organization of the Petroleum Exporting Countries, OPEC, headquarters in Vienna, Austria. REUTERS/Heinz-Peter Bader. 24 April 2017, Sweetcrude, Vienna,...

,Headquarters of the Organisation of Petroleum exporting Countries, OPEC, Vienna, Austria. 20 April 2017, Sweetcrude, Vienna, Austria — The price...

*The Organization of the Petroleum Exporting Countries, OPEC, headquarters in Vienna, Austria. REUTERS/Heinz-Peter Bader. 20 April 2017, Sweetcrude, Vienna,...

*The Organization of Petroleum Exporting Countries, OPEC, headquarters in Vienna, Austria. REUTERS/Heinz-Peter Bader. 18 April 2017, Sweetcrude, Vienna,...

*The headquarters of the Organisation of Petroleum Exporting Countries, OPEC, Vienna, Austria. 12 April 2017, Sweetcrude, Vienna, Austria — The price...

*The Organization of the Petroleum Exporting Countries, OPEC, headquarters, Vienna, Austria. REUTERS/Heinz-Peter Bader. 11 April 2017, Sweetcrude, Vienna,...

*The Organization of the Petroleum Exporting Countries, OPEC, headquarters, Vienna, Austria. REUTERS/Heinz-Peter Bader. 10 April 2017, Sweetcrude, Vienna,...

*The Organization of the Petroleum Exporting Countries, OPEC, headquarters, Vienna, Austria. REUTERS/Heinz-Peter Bader. 07 April 2017, Sweetcrude, Vienna,...