Seeking Alpha | The Crude Crash Has Created Oil's Technological Superpowers OilPrice.com Falling oil prices which started in late 2014 have highlighted an increased emphasis on the cost of producing oil, particularly from shale oil formations in the U.S. With 50 percent of U.S. oil production coming from U.S. shale, analysts initially ... Cash Flow, $50 Oil, And The Oil Price Challenge Going Forward |