Romania has proven natural gas reserves of 726 billion cubic meters (25.94 trillion cubic feet) and is ranked 30th among countries with proved reserves of natural gas.[1] About 75% of Romania's natural gas resources are located in Transylvania, especially in Mureș and Sibiu counties.[2] The largest natural gas field in Romania is the Deleni gas field discovered in 1912 and located in Băgaciu commune, Mureș County, with proven reserves of 85 billion cubic meters or 3 trillion cubic feet.[3] Other important gas fields include the Filitelnic gas field (40 bcm – 1,430 bcft),[4] the Roman-Secuieni gas field (24 bcm – 850 bcft),[5] the Voitinel gas field (11.8 bcm – 415 bcft),[6] the Ghercești gas field (11 bcm – 400 bcft)[7] and the Sărmașel gas field (10 bcm – 354 bcft)[8] all with reserves larger than 10 billion cubic meters or 350 billion cubic feet. Currently Romania has the second largest natural gas reserves in the European Union just after the Netherlands.[1]