Dont know much about geo-politics but someone is playing a huge dirty game .... could be OPEC or USA ... it deals with many issues at hand:

1. Strangling Russian economy

2. Straightening out Iran

3. Disrupt Shale Oil production rise

4. Create financial gap between cheap oil and other renewable alternatives ....etc...etc...etc...

It will be very interesting to see what happens in the countries where shale oil production is on rise .... somehow tax payers are going to pay because many shale oil companies may go bankrupt ... that means either you pay higher prices at gas pump & stores (b'cause oil is expensive) or pay for shale oil companies that cant sustain their economies.