Chokepoints are narrow channels along widely used global sea routes and are critical to global energy security. The inability of oil to transit a major chokepoint, even temporarily, can lead to substantial supply delays and higher shipping costs, resulting in higher world energy prices. According to the EIA (U.S. Energy Information Administration) the Danish Straits and Turkish Straits, together transited by a combined volume of more than 5 million barrels per day (b/d) in 2016, are important chokepoints for Europe’s crude oil and petroleum liquids supply. Nearly 59 million b/d of global petroleum and other liquids production moved on maritime routes in 2015. Although most discussions of maritime chokepoints for oil trade focus on the Strait of Hormuz and the Strait of Malacca, which together were transited by a combined volume of more than 30 million b/d, other chokepoints are significant for specific regions.
The Danish Straits, a series of channels that connect the Baltic Sea to the North Sea, are an important route for Russian seaborne oil exports to Europe. An estimated 3.2 million b/d of crude oil and petroleum products flowed through the Danish Straits in 2016. Russia shifted a significant portion of its crude oil exports to its Baltic ports after opening the port of Primorsk in the Gulf of Finland in 2005.
The Turkish Straits, which include the Bosporus and Dardanelles waterways, divide Asia from Europe. The Bosporus is a 17-mile waterway that connects the Black Sea with the Sea of Marmara, and the Dardanelles is a 40-mile waterway that links the Sea of Marmara with the Aegean and Mediterranean Seas. Both waterways are located in Turkey and supply Western and Southern Europe with oil from Russia and the Caspian Sea region.
Only half a mile wide at the narrowest point, the Turkish Straits are among the world’s most difficult waterways to navigate because of their sinuous geography. About 48,000 vessels transit the Turkish Straits each year, making this area one of the world’s busiest maritime chokepoints. Commercial shipping has the right of free passage through the Turkish Straits in peacetime, although Turkey claims the right to impose regulations for safety and environmental purposes.
An estimated 2.4 million b/d of crude oil and petroleum products flowed through the Turkish Straits in 2016, more than 80% of which was crude oil. These Black Sea ports are among the primary oil export routes for Russia and other Eurasian countries, including Azerbaijan and Kazakhstan. (Source: EIA)