Notice that the noun, “refineries” is used in the plural. Anyone of them produces between 300 and 500 barrels per day. With oil at $100/barrel that’s about $40,000 bucks per unit. With 50 such units they could easily produce $2,000,000 a day. Few units, fewer dollars.
Crude oil is at $100/barrel, but that's not what refineries produce. The crude oil goes in and gasoline and various other grades of fuel and lubricating oils (worth considerably more than the original crude oil) comes out.
Except we they are talking about 12, not 50 units. Dollars were referenced to these units, not others.
And we have had many reports talking about the large discounts, down to $25 a barrel ISIS has had to go to in order to sell black market oil.
I’m going by the actual reports, not “what if” unsupported guesses.