The end is fast approaching for a Northwest Territories oilfield Imperial Oil Ltd. first tapped more than a century ago. The Calgary-based company, majority owned by U.S. heavyweight ExxonMobil Corp., announced Friday that it aims to wind down production at Norman Wells by the end of the third quarter of this year. That’s sooner than the … Continue reading ‘Difficult news’ as Imperial announces speedier shutdown of N.W.T. oilfield