“I think the expo was a great success,” Glenn Vawter, executive director of the National Oil Shale Association said of the energy expo held last week in Meeker. Vawter has spent more than 40 years studying oil shale and set up a booth to share information he has gathered at the annual expo, sponsored by EnCana Oil & Gas (USA) Inc., Enterprise Products, ExxonMobil, Halliburton, Williams and the Meeker Chamber of…