People still don't get there is no place to put new oil finds in the world. We need to consume what we have in storage , plus drill for more on the slope to get oil from from 500k barrels to 1.4m barrels in the pipeline. 
The pipeline does not have an unlimited life it wears from the inside out from oil sanding the inside of the pipe.
Replacement will be necessary at some point or tankers to the Arctic will be required if we are going to stay in oil.
Everyone will most likely go for Russia;s oil first as it's cheaper and no sales restrictions overseas.