In 1918, Italian geologist Leo Madalena drilled the first Albanian oil well near Drashovica (
Vlorë). The well reached a depth of 200 meters and, despite the small amount of oil produced, received positive results. The results attracted the attention of major oil companies, such as Anglo-Persian
APOC Oil Company and American
Standard Oil. Since 1918, more than 5,650 oil and gas wells have been drilled in Albania. 500 natural gas wells have been drilled, with 255 producing natural gas, and five oil fields have 4,728 oil wells. Albania currently has 12 known oil deposits and 5 natural gas deposits.
Patos-Marinëz, an area of 44 thousand hectares, is the largest oil-bearing zone in continental Europe. It is estimated to contain 5.4 billion barrels of crude oil. Albpetrol JSC operates according to the norms and rules of the market economy, with the object: Research and production of the hydrocarbons which included a full cycle of seismic works, geological, engineering, geophysics, research, extraction, processing and petroleum products marketing. In 1974, Albpetrol achieved their maximum oil production, at 250,000 tons of oil/year (or 6,165 tons of oil/day equivalent to 38,408 barrels/day). Albpetrol's highest gas production was in 1982, at 940,000,000 Nm3 gas/year (or 2,575,342 Nm3 gas/day). In the 1970s and 80s, the oil industry was made of 34 enterprises who employed almost 25,000 employees, of which 2,800 where medium or senior specialists. In the latter part of 2013, several oil and gas fields were discovered and put in operation, including three oil and four natural gas fields in sandy layers and nine oil and one gas condensing oil field in limestone. Before 1990, Albpetrol JSC was one of the largest subsidiaries of the Albanian State and one of the largest producers of revenue in the state budget. The transition from communism brought setbacks and reductions of society activity for Albpetrol. In the mid-1990s, a number of international oil companies came to Albania and took, by concession, the oil fields administered by Albpetrol. This changed the role of the company, which today not only produces oil, but serves as a regulatory entity and a controller of related hydrocarbon agreements between the Albanian state and foreign companies. The oil and gas industry will continue to have an important role in the Albanian economy, not only because it employs a significant number of workers, but also for the supplemental revenue the industry supplies the state. ==Geological reserves==