Companies like Royal Dutch Shell Plc and Exxon Mobil Corp.historically invested tens of billions of dollars over many years to develop huge reserves in isolated areas like northern Alberta, Kazakhstan or in the middle of the ocean. Shale is different. A tight-oil well could be drilled within a year for a few million dollars. As prices fell, more companies jumped in with more investment. Now, shale regions that were barely a blip on world markets a decade ago are expected to pump 7.5 million barrels a day in four years, and output probably won’t peak until after 2025… FULL ARTICLE
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