Teine Energy Ltd., an oil and natural gas producer majority-owned by Canada Pension Plan Investment Board, is working with banks on an initial public offering and may raise as much C$700 million in the next few weeks, said people familiar with the process. The closely held company, the largest light-oil producer in the Viking formation in southwestern Saskatchewan, hired Canadian Imperial Bank of Commerce and Toronto-Dominion Bank to manage the offering, said the people, who asked not to be identified because the matter is private.