Yeah right, in 7 days it will start and it will stop in the next 6 
There will be no war, why should there be any war between those countries in the first place?
All their interest are aligned when it comes to oil, if they go to war between them they both lose so they will simply pump more and more oil as they have the cheapest oil and they are going to look at which of the biggest oil produces are going to crumble first.
Venezueala? Nigeria? Mexico? Rusia?

By the time the US shale runs out of funds like the Canadian oil sands, these counties would have crumbled already.

A war between the oil producers?Nope!
On the other hand, Russia and the URSS defaulted twice during a low price oil and Nigeria isn't that better, you're looking at the wrong map.

And 7 days? Lol..