• Shell gas station in Tatarstan. File photo
  • Shell gas station in Tatarstan. File photo
  • A picture shows the logo of Anglo-Dutch oil giant Shell
  • Protesters gather at Park Strip to demonstrate against Shell oil August 31, 2015 near the Dena’ina Convention Center, in Anchorage, Alaska.
  • German Chancellor and chairwoman of the German Christian Democrats, CDU, Angela Merkel, points with her fingers during a visit to the convention venue prior to the 27. party convention in Cologne, Germany, Monday, Dec. 8, 2014.
  • A picture shows the logo of Anglo-Dutch oil giant Shell
  • Pipes for the construction of the Nord Stream 2 pipeline
  • Nord Stream gas pipeline launched in Germany
  • Shell logos are pictured outside a Royal Dutch Shell petrol station in Hook, near Basingstoke on January 20, 2016.
  • Shell logos are pictured outside a Royal Dutch Shell petrol station in Hook, near Basingstoke on January 20, 2016.
  • Gazprom Chairman of the Board Alexei Miller visits the ETERNO shop of the Chelyabinsk Pipe-Rolling Plant
  • A sign shows the price of gasoline at a Shell station near downtown Detroit on Thursday, Jan. 1, 2015.
  • Gazprom Chairman of the Board Alexei Miller visits the ETERNO shop of the Chelyabinsk Pipe-Rolling Plant
  • Khaled al Otaiby, an official of the Saudi oil company Aramco watches progress at a rig at the al-Howta oil field.
  • Shell logos are pictured outside a Royal Dutch Shell petrol station in Hook, near Basingstoke on January 20, 2016.
  • Nord Stream gas pipeline launched in Germany
  • A liquefied natural gas (LNG) plant
  • Preparations for opening of St Petersburg International Economic Forum (File)
  • Oil Pump Jack
  • Shell logos are pictured outside a Royal Dutch Shell petrol station in Hook, near Basingstoke on January 20, 2016.