The largest deposits are in the North Sea which belong to the UK and Netherlands. Russia also has very large deposits, but I'm not sure you would include it in Europe. Germany and Denmark have offshore deposits as well. Other countries include Italy, Austria, France, Poland, Hungary, Greece and Spain.
Norway is the largest oil producer and exporter in Western Europe
Austen,Texas would be the answer to; the largest oil deposits in north America
Venezuela has the largest crude oil deposits in the world, with the largest reserves located in the Orinoco Belt.
venezuala
The largest deposit for oil in Europe is located in Russia.
Venezuela has the most oil reserves in the Western Hemisphere and the world.
Western Europe produces more oil than Eastern Europe. The main oil supplier in Western Europe is the North Sea, while it's the Black Sea and the Caucasus in Eastern Europe.
The North Sea
There are many large oil deposits in the world. These include the Piceance and Uinta Basins, the Orinoco Belt, the Alberta Oil Sands, and Ghawar.
The top three oil producers in Western Europe are Norway, the United Kingdom, and Denmark.
Alberta has the world's largest oil sands deposit.
Russia, Iran, USA and Malaysia.