Encana Corp has agreed to sell a more than 6,800 producing gas wells and other portions of its Clearwater assets in southern and central Alberta for about $605 million to Ember Resources Inc. The deal will more than double Ember's land and production holdings in Alberta, which are concentrated on coalbed methane lands in the Horseshoe Canyon area. The Clearwater assets going to Ember include about 485,600 hectares of land and wells that produce the equivalent of 180 million cubic feet of natural gas per day.