Sen. Marco Rubio (R-Fla.) is pushing for the expansion of U.S. crude oil exports.
Landrieu takes the helm of the Senate Energy and Natural Resources Committee Tuesday.
Wyden and Cantwell want a report on potential impacts of lifting the decades-old ban.
Rep. Peter DeFazio said lifting the ban on crude oil exports could harm public lands.
Sens. Mary Landrieu and Lisa Murkowski say legislation is likely if Obama doesn't act.
A Senate panel will examine the pros and cons of lifting a ban on crude oil exports.
The Alaska Republican asked the president to lift the ban and approve the pipeline.
Refiners say lifting the ban would hurt their booming industry.
Sen. Wyden hopes to hold a hearing on the U.S. crude export ban early this year.
The report will discuss the global effects of steadily growing U.S. energy resources.
"The debate has been centered on natural gas, and she wants to switch it to oil," an aide said.