Even before 1936 Germany had started commercial level of synthetic oil production and this likely part of the expansion of German oil production in the 1936-40 expansion document.
Thanks for the feedback regarding synthetic oil production. I've edited the original post to clarify that the HoI4 distribution within the game closely reflects 1936 crude oil production by country.
Good thought about the synthetic oil.
But I don't think that the real world synthetic oil production numbers were incorporated into the 1936-1940 expansion document. The synthetic oil production numbers are separate, I believe. I'll attempt to tease apart crude oil vs synthetic oil production in a future posting (unless someone else wishes to do so).
I note that Czech oil is missing from the game.
The available evidence indicates that HoI4 resource numbers are based on 1936 real world production numbers. If that is the case,
Czech crude oil production in 1936 was 127k barrels out of a world production total of 1,791,540k barrels ... or 0.0071% (yes, percent).
0.000071 x 2,022 HoI4 oil units = 0.144 units of HoI4 oil. Doesn't quite make it onto the game board.
Countries could expand their oil production simply by pumping more from existing oil fields, but this can deplete the field faster.
Impressive knowledge of the oil industry. Well done. The Canadian wartime oil pumping experience illustrates this point about depleting their oil field faster.
In 1942, The Canadians reached peak oil during the war when they dropped the pressure in the Turner Oil Fields.
http://history.alberta.ca/energyher...he-turner-valley-gas-plant/opportunities.aspx
After 1942 until the end of the war, Canada produced less and less oil every year (
page 986).
Edit: 10 million barrels in 1942 represented 0.478% of world production (
page 987). A bit of dodgy math here, but if you multiply 0.00478 by 2,022 oil units, that equates to 9.7 HoI4 oil units. This suggests that Canada should get 10 oil (not 36) from its Turner Valley Oil Field national focus.