CNOOC Limited announced that it has achieved a major exploration breakthrough in Mesozoic buried hills offshore Bohai Bay. Longkou 7-1 oilfield is located in eastern Bohai Bay, with an average water depth of about 26 meters. The discovery well LK7-1-1 was drilled and completed at a depth of approximately 4,400 meters, which encountered a total of 76 meters oil and gas pay zones.

The well was tested to produce about 210 cubic meters of crude oil and nearly one million cubic meters of natural gas, a new record for gas tested productivity in Bohai Bay.