CANTERRA ENERGY TO DRILL WELL OFF NOVA SCOTIA <Canterra Energy Ltd> said it will drill an exploratory well on the Scotian shelf, about 280 kilometers east-southeast of Halifax, Nova Scotia. Drilling will begin in late April 1987 in 61 meters of water and will be drilled to a total depth of 3,500 meters, Canterra said. Canterra will operate the well and has a 39 pct interest in it. <Petro-Canada Inc> has 26 pct, <Trillium Exploration Corp> has 20 pct and <Nova Scotia Resources (Ventures) Ltd> has 15 pct.