Today, petroleum became much more important. According to the World Energy Statistics Annual the total estimated reserve of the petroleum is 136.5 billion tons, 1006 billion barrels. The OPEC countries hold 104.9 billion tons - ~~2 billion barrels. The raw petroleum reserve in Turkey is 39.199.000 tons (1993 data) Turkey’s annual petroleum consumption is 27 million tons. Turkey produces only 4 million tons of petroleum. Turkey imports 22-23 tons of petroleum every year.