I agree that US gov and the greenies want to downplay potential and kill fracking. That said, we should leave open the possibility that fracking in flat-lying sedimentary geological formations in the center of the continent may be hugely more productive than the same technology applied to the melange of rocks scraped from the ocean floor and volcanic island arcs pushed onto the continental margin. And the reports refers to the possibility that oil within this formation may have already migrated—meaning we may have sucked some of it up already drilling in the lower Cental Valley.
The same government group is raising the producible reserves in the Bakken and Eagle Ford.