Where are you getting the 10 and 20 million barrels per day numbers? Those are roughly the crude oil production and total petroleum product consumption numbers given here[1], but those aren't measuring comparable things because there are products other than crude oil that go into the consumption number. The same source gives 14.2 million barrels per day as the total petroleum product production.

[1] https://www.eia.gov/tools/faqs/faq.php?id=268&t=6