On oil and gas
Vasilk, a nice source of dat that leugue of nations data. Just remember it is far from complete (Oil for Europe & South America are OK, but US data disagrees with US Bureau of Mines data and China is missing, soviet data is just a guess). Anyway, I had no good sources on some of those south american countries and roumania, so it is quite helpful. Furthermore, add oil from shale to the crude oil production, as shale oil was at that time used as bunker fuel for ships mainly. On natural gas, well that figure can be neglected. Conversion of cubic feet to metric tonnes is about 775 ccf to 1 metric ton. The US, by far the largest user of natural gas, produced about 78.000 ccf which would just be 100 metric tons. With average US crude production figures of 190-210 million metric tons, 100 metric tons more or less are peanuts.
On oil in HOI, I think you can consider oil in HOI as oil used for military transportation purposes, which in war at that time would probably imply 30% of crude oil production (conservative estimate). During the HOI period, world crude production averaged about 300 million metric tons. This would equal 90 million tons of HOI oil in a year. Divide by 360 gives 0.25 million ton HOI oil a day. With 100 tons = 1 HOI oil (according to MathGuy), HOI daily oil production should be around 2500 oil points. Of course, if military use of oil was higher than the 30%, the daily oil figure will rise.
Regarding crude production versus refined products. Many countries did not have crude oil production, but did refine the stuff and vice versa. Where will you locate the oil production in HOI? Personally I believe the producer of the crude should get the oil, while the refining location gets ICs to represent the refining industry there. As a refinery cannot run without the crude, but crude can be produced without refineries present (some crudes hardly needed refining to be suitable for fuel purposes, for instance some Borneo crudes and Maikop crude). So in the cse of Romanian oil being refined in Bulgaria, give romania the production, but have a small convoy of oil from romania to bulgaria to represent that oil flow.