The size of the U.S. release, that came when the oil price was only about $80 a barrel - way off record highs of $147 a barrel touched in 2008 - led some analysts to say it could hit investments in drilling projects, including in the United States, by sending a signal that $80 a barrel is the upper limit for the market.
Granholm said the United States does not control the price of oil and the administration's long-term goal is to move off oil.
"Ultimately, short-term the solution is to increase that supply, so that it meets demand, and long term to be able to invest in clean energy, so that we are not so reliant on volatile sources," Granholm said.