From memory: A month or so ago, the US inventories were the highest in the 80 years that records have been kept. If my memory is correct, I bet that even after 9.6 million barrels draw down, they are still well above the longer term (10+ years or more) average, but not good at searching, so just ask you to tell what peak stored inventories were -I.e. what fraction is the 9.6 million barrel drop?
It is hard to rapidly slow down production as demand drops. - Why inventories hit the all time high.
On the 6% vs. 15% changes the gap between Brent - WTI has been deceasing for some time, again from memory. I.e. this is more of the same, not much related to Egypt problems, but the rise in price of both is as Egypt controls the Suez Canal, - still important for transport of oil to Eastern Europe, even in the age of supper tankers.
Next day by edit: Here is graph that makes my point. I.e. inventories are still far ABOVE the running 10 year average.