Thrace Basin basement, comprises interbedded fine to coarse grained clastics from a variety of depositional environments, turbidite, muddy carbonates with local reef developments, river channels and tuffs. More than 400 wells were drilled till 2008; 14 gas and 3 oil fields were discovered and all of them are producing. Main gas productions zones are between Eocene- Oligocene deposits; Hamitabat (turbiditic sandstones), Ceylan (tuffs), Sogucak (reefal limestone), and Osmancik (deltaic sandstone) formations. Shales of Hamitabat and Mezardere formations have good source potentials. Thrace Basin The European side of Turkey is called the Thrace Basin. It is the largest and thickest Cenozoic sedimentary basin
Economy of Turkey 2005. Share of mid and high technology products has increased from 5% in 1980 to 14% in 1990 and 43% in 2005. Turkey is an oil and natural gas producer, but the level of production by the state-owned TPAO isn't large enough to make the country self-sufficient, which makes Turkey a net importer of both oil and gas. However, the recent discovery of new oil and natural gas fields in the country, particularly off the Black Sea coast of northern Anatolia; as well as in Eastern Thrace, the Gulf of İskenderun and in the provinces of the Southeastern Anatolia Region