gloucester sale, page-7

most expensive one and the most vulnerable barrel in an economic crisis. That honor belongs to the tar sands producers of Alberta, where the production cost from existing projects is roughly $40/bbl, from new projects about $65/bbl, and from future projects an estimated $85-$100 per barrel. Tar sand project costs ran up approximately 50% this year even as oil prices fell, putting a double-squeeze on tar sands producers. Companies are now being forced to cut back on financed development and try to fund their expansions out of cash flow.
ital'

Quotation from 'Energy and capital'