FILE – In this Dec. 19, 2014 file photo, oil pump jacks work in unison, in Williston, N.D. In the year since the energy industry last gathered in for its big annual confab in Houston, prices for oil and natural gas took a dive that few, if anyone, saw coming. In 2015, natural gas has fallen even further than oil as U.S. drillers have been producing enormous amounts of gas and mild winter weather kept demand relatively low. (AP Photo/Eric Gay, File)