Greece has 10 million barrels of proved oil reserves as of 1 January 2011. Hellenic Petroleum is the country's largest oil company, followed by Motor Oil Hellas. Greece's oil production stands at 7,946 barrels per day (bbl/d),ranked 90th, while it exports 1,863 bbl/d (57th) and imports 496,600 bbl/d (25th).

The estimated output in Euros of the three deposits is €25 billion over a 15-year period, of which €13–€14 billion will enter state coffers. Greece's dispute with Turkey over the Aegean poses substantial obstacles to oil exploration in the Aegean Sea.

 

In addition to the above, Greece is also to start oil and gas exploration in other locations in the Ionian Sea as well as the Libyan Sea, within the Greek exclusive economic zone, south of Crete.

Coal

Megalopoli Mine is a large lignite and coal mine owned by the Public Power Corporation of Greece. The largest lignite and coal mine in Greece are in the area of Western Macedonia and especially in Ptolemaida.