The oil that is produced in Texas and in Saudi Arabia ,all part of the pool of oil available for sale and use. in this respect, it is like the grain produced in the Ukraine or Argentina or Kansas. All is pretty close to being fungible,like cash.
Fungible based upon the limits and cost of transportation. There is a reason that essential the same quality oil in North Dakota has sold for ~$10 less than in Cushing, and that has been $10~20 dollars less than the coast.