According to my 1960's Atlas.....
All figures are from the year 1960.
Oil production:
World: 1052 million tons
United States: 345 million tons
The Middle East: 267 million tons
out of which
Kuwait: 84 million tons
Saudi Arabia: 61 million tons
Iran: 52 million tons
Iraq: 48 million tons
Others: 22 million tons (Qatar and Bahrain and today's emirates produced oil by then too)
And then comes Venezuela producing: 151 million tons
Soviet Union: 148 million tons
Canada: 26 million tons
Indonesia: 20 million tons
Mexico: 15 million tons
Romania: 12 million tons
Algeria (only in Sahara): 9 million tons, however the exploitation had just started and rose rapidly after a few years
Italy: 2 million tons
France: 2 million tons
The rest of the world: 55 million tons
In the Soviet Union, Baku was still the single most important source of oil, accounting for at least 60-70 % of production. 10-20 percent was extracted in "Ural", as well as in Sakhalin, a third of that in Uchta, less than a tenth in Emba, and some in Samarkhand and Tashkent.
France produced most of it's little oil on the south coast, Italy in Cortemaggiore.
Indonesia produced one third of it's oil on Sumatra, the rest was mostly concentrated on Borneo (I believe Malaysia produced some too).
Australia produced most of it's oil near that large peninsula in the Northern Territories, and on the country's East coast.
Japan produced mostly around Akita.
Canada produced mostly around Edmonton.
Mexico near Yucatán.
Argentina produced it's oil (3 quarters) mostly along the western parts of the country, near the mountains, and some on the east coast of Patagonia.
China produced approximately as much as Japan in the Sichuan province.
Do you intend to use 500000 tons = 1 oil or a million tons = 1 oil, or some other conversion rate? Frankly I don't know how much oil is produced in total in a vanilla game...
If you believe natural gas should count as oil in-game, I can give you similar information for that too.
Anyhow, the figures are not to be confused with 1945, or the 50's, but they may give you an idea of where to place effects for oil events.