order of 38.2 Billion barrels of oil in 'Proven Reserves' (see linked EIA Report)...and we consume approximately 7.2 Billion barrels per year (search the EIA)...so, some simple arithmetic says that we can stay "Independent" of any foreign sources of oil for another 5.3 years...at which time, pending no new dramatic increases in our reserves, we'll be 'tapped out' and begging for oil.
Now granted, this involves a lot of "estimation", but it by no means paints a picture of "Abundance" when it comes to such a critical resource...just imagine the political implications of having to beg for every drop of oil sometime in the next 10, 20 or 50 years if we don't change our energy mix...given this 'writing on the wall', why would a reasonable person not take action to get off oil and gas ASAP?
Note: the 'ANWR' project is estimated to have between 4 and 11 Billion barrels of oil...not a huge increase in our reserves.
Link: https://www.eia.gov/naturalgas/crudeoilreserves/