Houston,TX-Based Oil & Gas Co Noble Energy Generated 4Q 2017 Net Income of $516 Mil, an Earnings Improvement of $756 Mil From Its 4Q 2016 Net Loss of $240 Mil ....................................................................................... Included in the 4Q 2017 Net Income Was a US Federal Income Tax Benefit of $270 Mil From the Oil and Gas Co Favored US Trump Tax Cuts Act