A referendum will be held Sunday in Germany on a proposed bid from Munich. Poland and Slovakia are expected to lodge a joint bid.
The IOC will select the 2022 host city in 2015.
Oslo's bid includes plans to hold the medal ceremonies in the city center and several competitions in venues on the city outskirts. The Alpine events would be held in Lillehammer, about 135 kilometers (85 miles) north of Oslo. The venues for the opening and closing ceremonies have not yet been decided, Olsen said.
In May, the Oslo city council voted in favor of asking for a 34 billion Norwegian kroner ($5.7 billion) financial guarantee from the Norwegian government a precondition for hosting the games. Norwegian lawmakers are expected to decide on that in the second half of 2014, Olsen said.
A popular referendum in Oslo in September backed the bid to host the games.
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Associated Press writer Jan M. Olsen in Copenhagen, Denmark, contributed to this report.