The company will complete its initial research in May on the two options, which will be followed by a feasibility study.

Both of the schemes under evaluation by CNOOC Research Institute will engage a floating production, storage and offloading vessel for the field development, said sources.

They suggest that the operator could eventually opt to use the semisub scheme that involves a subsea wellhead system — a development option it is more familiar with and one that has been widely used in the South China Sea.

The