The Derna oil field is a shale oil field located in Derna,

Bihor County Bihor County () is a county ( județ) in western Romania. With a total area of , Bihor is Romania's 6th largest county geographically and the main county in the historical region of Crișana. Its capital city is Oradea. Toponymy The origin of ...

. It was discovered in 1900 but remained undeveloped. The total

proven reserves Proven reserves (also called measured reserves, 1P, and reserves) is a measure of fossil fuel energy reserves, such as oil reserves, natural gas reserves, and coal reserves. It is defined as the " antity of energy sources estimated with reasonabl ...

of the Derna oil field are around 33.5 million barrels (4.5×10⁶tonnes), and production if started would be centered on .

References

Oil fields in Romania Geography of Bihor County {{Romania-geo-stub