Natural plunge in Iran's oil output
From the beginning of 2012, even before the European Union and the United States enforced sanctions on Iran's oil sector, the country was forced to halt production at some of its oilfields due to the gradually reduction in the EU's oil imports from Tehran. Europe accounted for 18 per cent of Iran's total oil exports in 2011. Tehran's refining capacity has remained the same since 2012, however, by enforcing sanctions on Iran's oil exports in July 2012, Asian customers were also forced to reduce their oil purchases from Iran step by step. The United States every six month has exempted some countries from the sanctions due to their continuous effort to cut their oil imports from Iran. This factor has forced Iran to accelerate shutting down oil wells at some of its fields. But another factor that has been mainly ignored is the fact that the country faces with natural production decline because about the 80 per cent of Iran's active oil fields are in their second ha