Yep, because apparently refineries can be built and operated for free.
The theory is that all the movement of crude oil and refined products around the world is the cheapest way to do it. In actual practice, building refineries, pipelines, shipping terminals, etc. tends to lock you in to the situation that prevailed when you built them. So you build on, and do your best to take care of current need whilst planning for whatever the future may bring. Then, of course, the commodities speculators ('scuse me, "traders") get involved. And of course, the allegedly free market ain't actually all that free.
The only thing you really need to know is it's all Trudeau's fault. Just vote him out, and the VERY NEXT DAY gas will be thirty cents a gallon and we'll all have fun, fun, fun (till our daddies take our T-bird away).