France’s Total said the Tyrihans oil and gas field in the Norwegian Sea started production. This field, in which Total owns a 23.18 percent interest, is the largest field to be brought on stream in Norway in 2009. Development drilling operations will continue over the next two years. Total’s share of production is expected to average around 25,000 barrels of oil equivalent per day over the next decade. Located southeast of the Asgard field in the Norwegian Sea, in about 270 metres water depth, Tyrihans is a complete sub-sea development tied into existing facilities and infrastructure of the Asgard and Kristin fields on Haltenbanken. Total holds a participation interest of 7.68 percent in Asgard unit and 6.00 percent in the Kristin field.