UPDATE 3-Oil cos shut output in Gulf due to hurricane

* BP, Chevron, Marathon shut production in Gulf of Mexico

* Louisiana Offshore Oil Port stops tanker offloading

* Chevron, Anadarko evacuating workers, no output shut

* Exxon preparing for possible shutdowns (Adds Chevron output shut)

By Erwin Seba and Bruce Nichols

HOUSTON, Nov 8 (Reuters) - U.S. oil companies were shutting production on Sunday as they evacuated workers from the Gulf of Mexico ahead of Hurricane Ida, which is forecast to roar across the offshore oil patch Monday before making landfall on Tuesday.

BP Plc (BP.L: Quote, Profile, Research), one the Gulf's largest oil producers, said on Sunday some of its production was shut and nonessential workers were evacuated from Ida's forecast path. The company does not disclose amounts of shut production.

Chevron Corp (CVX.N: Quote, Profile, Research) said it had also shut some production.

Marathon Oil Corp (MRO.N: Quote, Profile, Research) had shut its Ewing Bank production platform after evacuating workers, a spokeswoman said on Sunday. The Ewing Bank platform can produce 11,700 barrels of oil and 10.5 million cubic feet of natural gas a day.