it could cause an oil shock wave globely. if the bosphorus was closed, 7% of the oil of the world would cease to be shipped. disruption of oil supply could throw the world into turmoil. turkey, 2015. a tanker loaded with 150,000 tons of russian crude oil. navigates through the bosporou is which is at its narrowest point 2 rkds 200 feet woods. iran, russia s main competitor, is suspicious with russia s links with the west and oil deals in the caspian sea. a terrorist group plows a boat into the russian tanker.