SASKATCHEWAN'S government Jan. 1, 1994, will end a 10 year policy of granting royalty holidays for new oil and gas wells. A royalty of at least 5% will be charged on all new oil and gas production. Incentives will be offered for exploratory gas wells and most oil wells. Under the new system, royalties on a nonheavy oil well producing 30 b/d would fall to 16% from a current 26%. Royalty for a comparable well in Alberta is 8-9%.