In pictures: 23rd World Energy Congress in Istanbul

World Energy Congress in Istanbul brings together players across the energy sector to discuss a transformation of the sector.
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United Arab Emirates Energy Minister Suhail bin Mohamed al-Mazroui arrives to attend a press conference during the 23rd World Energy Congress on October 12, 2016 in Istanbul. OPEC has issued an invitation to Russia and other key non-members of the oil cartel to attend a meeting later this month aimed at rebalancing crude prices after historic lows, the Qatari energy minister said on October 12. (Ozan Kose/AFP/Getty Images)
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Amin al-Nasser, president of state oil giant Saudi Aramco, delivers a speech on October 11, 2016 during the 23rd World Energy Congress in Istanbul. World Energy Congress in Istanbul brings together players across the energy sector to discuss a transformation of the sector. Saudi Arabia said on October 10 it was 'not unthinkable' that the price of crude oil could surge to $60 a barrel by the end of the year but warned against drastic production cuts that might shock markets. (Ozan Kose/AFP/Getty Images)
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Mohammed bin Saleh al-Sada, President of the Organization of Petroleum Exporting Countries (OPEC) and Qatar's Energy Minister attends a press conference during the 23rd World Energy Congress on October 12, 2016 in Istanbul. OPEC has issued an invitation to Russia and other key non-members of the oil cartel to attend a meeting later this month aimed at rebalancing crude prices after historic lows, the Qatari energy minister said. (Ozan Kose/AFP/Getty Images)
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Bob Dudley, BP Chief Executive of BP delivers a speech on October 11, 2016 during the 23rd World Energy Congress in Istanbul. World Energy Congress in Istanbul brings together players across the energy sector to discuss a transformation of the sector. (Ozan Kose/AFP/Getty Images)
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Turkish President Recep Tayyip Erdogan gives a speech during the 23rd World Energy Congress on October 10, 2016 in Istanbul. Russian President Vladimir Putin visits Turkey on October 10 for talks with counterpart Recep Tayyip Erdogan, pushing forward ambitious joint energy projects as the two sides try to overcome a crisis in ties. (Ozan Kose/AFP/Getty Images)
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Russian President Vladimir Putin gives a speech during the 23rd World Energy Congress on October 10, 2016 in Istanbul. Putin visits Turkey on October 10 for talks with counterpart Recep Tayyip Erdogan, pushing forward ambitious joint energy projects as the two sides try to overcome a crisis in ties. (Ozan Kose/AFP/Getty Images)
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Jean-Bernard Levy, Chairman and CEO of Electricite de France (EDF) delivers a speech during the 23rd World Energy Congress on October 11, 2016 in Istanbul. World Energy Congress in Istanbul brings together players across the energy sector to discuss a transformation of the sector. (Ozan Kose/AFP/Getty Images)
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Secretary General of OPEC, Nigerian Mohammed Barkindo speaks during the 23rd World Energy Congress on October 11, 2016 in Istanbul. A pledge on October 11 by Russian President Vladimir Putin to work with OPEC in imposing output curbs had pushed oil prices up to their highest level for a year. (Ozan Kose/AFP/Getty Images)
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Minister of Petroleum of Venezuela Eulogio Del Pino speaks during the 23rd World Energy Congress on October 11, 2016 in Istanbul. A pledge on October 11 by Russian President Vladimir Putin to work with OPEC in imposing output curbs had pushed oil prices up to their highest level for a year. (Ozan Kose/AFP/Getty Images)
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Chief Executive of Total Patrick Pouyanne speaks during the 23rd World Energy Congress on October 11, 2016 in Istanbul. A pledge on October 11 by Russian President Vladimir Putin to work with OPEC in imposing output curbs had pushed oil prices up to their highest level for a year. (Ozan Kose/AFP/Getty Images)
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Vice President of Russian oil Major Lukoil Leonid Fedun, speaks during the 23rd World Energy Congress on October 11, 2016 in Istanbul. A pledge on October 11 by Russian President Vladimir Putin to work with OPEC in imposing output curbs had pushed oil prices up to their highest level for a year. (Ozan Kose/AFP/Getty Images)
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Dutch oil major Shell's director for Integrated Gas and New Energies Maarten Wetselaar speaks during the 23rd World Energy Congress on October 11, 2016 in Istanbul. A pledge on October 11 by Russian President Vladimir Putin to work with OPEC in imposing output curbs had pushed oil prices up to their highest level for a year. (Ozan Kose/AFP/Getty Images)