Shell Oil Shale Extraction Technology Economically Viable?

FuturePundit: Shell Oil Shale Extraction Technology Economically Viable?:
Sept 5, 2005
"The development of an economically viable way to extract oil from oil shale would put a ceiling on oil prices and would extend the oil era by decades. It would also increase the odds of significant global warming. Well, in light of all that a variety of media outlets are reporting that Shell Oil thinks it can produce oil from oil shale at $30 per barrel using an in situ process where the shale is cooked without first mining it onto the surface."