Australian minnow, Invictus Energy, has moved from citing "encouraging signs of hydrocarbon", in its drilling campaign in Zimbabwe, to formally declaring a hydrocarbon discovery. The company is on the sidetrack to the Mukuyu-2 well, (Mikuyu-2STK), its fourth hole on the Mukuyu prospect, in the Caborra Basa project, onshore Zimbabwe. "We are delighted to declare a…