OPEC members arrive in Vienna

The Organization of the Petroleum Exporting Countries (OPEC) 's 6th International seminar was held at Hofburg Palace in Vienna on June 3, 2015, prior to Friday's OPEC meeting.
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OPEC Secretary-General Abdalla Salem El-Badri, Saudi Arabia's oil minister Ali al-Naimi (R) and Qatar's Minister of Energy and Industry Mohammed Bin Saleh al-Sada (C) attend the Organization of the Petroleum Exporting Countries (OPEC) 's 6th International seminar at Hofburg Place on June 3, 2015 in Vienna, prior to Friday's OPEC meeting. (AFP/Getty Images)
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Saudi Arabia's oil minister Ali al-Naimi (R) and Qatar's Minister of Energy and Industry Mohammed bin Saleh Al-Sada attend Organization of the Petroleum Exporting Countries (OPEC) 's 6th International seminar at Hofburg Place on June 3, 2015 in Vienna, prior to Friday's OPEC meeting. (AFP/Getty Images)
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Saudi Arabia's oil minister Ali al-Naimi (R) and Qatar's Minister of Energy and Industry Mohammed bin Saleh Al-Sada attend Organization of the Petroleum Exporting Countries (OPEC) 's 6th International seminar at Hofburg Place on June 3, 2015 in Vienna, prior to Friday's OPEC meeting. (AFP/Getty Images)
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Saudi Arabia's oil minister Ali al-Naimi attends Organization of the Petroleum Exporting Countries (OPEC)'s 6th International seminar at Hofburg Place on June 3, 2015 in Vienna, prior to Friday's OPEC meeting. (AFP/Getty Images)
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(L-R) British energy giant BP CEO Bob Dudley, Executive Director of the International Energy Agency, Dutch Maria van der Hoeven, Saudi Arabia's oil minister Ali al-Naimi, OPEC Secretary-General Abdalla Salem El-Badri and Exxon Mobil Chairman and CEO Rex Tillerson attend the Organization of the Petroleum Exporting Countries (OPEC)’s 6th International seminar at Hofburg Place on June 3, 2015 in Vienna, prior to Friday's OPEC meeting. (AFP/Getty Images)
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OPEC's chairperson Qatar's Minister of Energy and Industry Mohammed Bin Saleh al-Sada opens the Organization of the Petroleum Exporting Countries (OPEC)’s 6th International seminar at Hofburg Place on June 3, 2015 in Vienna, prior to Friday's OPEC meeting. (AFP/Getty Images)
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Saudi Arabia's oil minister Ali al-Naimi speaks during the Organization of the Petroleum Exporting Countries (OPEC)’s 6th International seminar at Hofburg Place on June 3, 2015 in Vienna, prior to Friday's OPEC meeting. (AFP/Getty Images)