The wholly-owned subsidiary of Korea National Oil Corporation said that the first production well had been completed and flow tested by Diamond Offshore’s Ocean Nomad.

Another three wells have been drilled and cased to surface casing depth and all four subsea christmas tree valve systems have been installed on the seabed, the explorer said.

The project involves developing the Harris and Barra oilfields situated about 160 kilometres east of the Shetlands, which are estimated to contain recoverable reserves of more than 45 million barrels.

The