HARARE- Australian-listed Invictus Energy has started drilling one of two exploration wells for oil and gas in the northern part of Zimbabwe, the company said on Monday. The 3.5-km deep well, situated in the Muzarabani-Mbire area, is part of the Cabora Bassa project in Zimbabwe, which is 80% owned and operated by Invictus through its interest in Geo Associates. Invictus said in a statement that the drilling of the first well, Mukuyu-1, began on Friday and will last between 50 and 60 days. Mukuyu, which will cost