Prior to oil companies spending billions in infrastructure (and drilling) they determine net flow over a 30 year span. When there is room for additional outside product they sell that refinement space--hence the pipeline from Canada. An extra 800,000 barrels has already been plugged into the GOM equation and will not affect any GOM exploration or production. Only enhance the efficiency of the refineries.
What I do see is the construction of a new oil refinery in the current political climate. Which would lead to needing more oil from the GOM and Canada.
So you see it is a big difference.
Now if you are flying a 407 in the GOM then you might have an issue as the majors move exclusively deep water. The shelf properties will slowly be abandoned as the smaller companies can not profit at this price range. And I'd be willing to bet the larger helicopter operators in the GOM to follow to deep water and operate only mediums and heavy aircraft.