CALGARY — Imperial Oil says the massive Kearl oilsands expansion is up and running.

The $9-billion mine northeast of Fort McMurray, Alta., is expected to eventually produce 110,000 barrels of crude a day, doubling Kearl's target capacity.

During peak construction, the Kearl expansion had a workforce of more than 5,000 people.

CIBC World Markets analyst Arthur Grayfer says the mine is starting up on budget and about a month earlier than expected.

The first phase of Kearl, also with a targeted 110,000-barrel-a-day production rate, started up more than two years ago.

During the first quarter of this year, the first phase of Kearl averaged output of 95,000 barrels a day.

The initial development cost $12.9 billion — $2 billion more than expected as the company ran into delays transporting huge South Korean-made modules to the mine site.

Kearl is a partnership between Imperial (TSX:IMO) and its U.S. parent, ExxonMobil Corp.