It’s actually incredibly finely balanced, off the top of my head even with OPEC (well, Saudi) running with the taps fully open we’ll be back to supply=demand in late 2017/early 2018, only this time we’ll have had ~4 years of no investment which means production will lag behind the curve for a while leading to prices being back where they were fairly quickly.
PITA, as an industry we weren’t so badly hit by the recession, everyone still needs oil and plastic, a lot of projects got delayed or canceled but there was usually enough to keep ticking over. Now there’s nadda, zilch, zip, smeg-all. Less of a double dip recession, more like the ‘recovery’ was just a dead cat bounce for us before we fell of a cliff.