I have seen many articles in Bloomberg and Google Finance claiming that Aramco might be worth up to $3 trillion. I am quite skeptical about this. Rosneft produces about 4.5 million barrels a day, and still its market cap is only around $50 billion. What makes Aramco 100 times more expensive than Rosneft?
Not sure of the figures for each country but quality and ease of production is likely the biggest answer why Saudi Arabia has the greatest advantage and say in oil prices for the world. Russia might have equal oil but its not nearly as cheap to produce so far as I know.
There was a big fuss about them exploring in the artic terrority they apparently control but even if they do that it wont be cheap to get at or transport to customers and so on. Its possible the quality of oil and quantity is great but those are big hurdles to get over.
Its even possible Canada has equal oil but I heard of figures for production going upto 100 dollars a barrel which makes alot of what they have not that usable and again its not popular to extract in that country due to disruption and needed oil pipelines to transport. I cant imagine another country beating Saudi Arabia on all the points of advantage they have, the only major minus is they are located in a volatile area of the world hence the alliance with USA I guess. 3tn might be cheap considering usa debt is 19tn, the contrast of those two securities if we are talking value I'll take the oil performing far superior to treasury debt over its 25yr term or more