Does US shale mean cheap global oil by 2020?

Does the rise of US shale oil mean fuel buyers c an look forward to a multi-year period of crude price decline? Or is oil destined for new record highs above US$150 a barrel?

The question is dividing energy analysts who are split on whether or not shale and other predominantly North American ”unconventional” supply like Canadian oil sands will be enough to comfortably meet an increase in global fuel demand led by emerging markets to 2020.

via Business feed http://www.scmp.com/business/money/markets-investing/article/1074220/does-us-shale-mean-cheap-global-oil-2020