Patos Marinza is an Albanian oil field that was discovered in 1928. It is the biggest on-shore oil field in Europe, and with its 11,854 barrels (1,884.6 m³) every day the biggest oil producing field in Albania. The Patos Marinza oil field is located 10 kilometres (6 mi) east of the city of Fier in south central Albania. Its proven reserves are about 2 billion barrels (320×10^⁶ m³).