China’s CNOOC Ltd. has started production at the Nanbao 35-2 oil field S1 area in northern China’s central Bohai Bay, the company said Sept. 11.

Peak production of about 1,800 barrels of crude oil per day is expected in 2021.

The major production facility includes one unmanned wellhead platform with plans for a total of three development wells.

CNOOC Ltd. holds 100% interest in the project.