China National Offshore Oil Corporation (CNOOC) has delivered the world's first deep-water semi-submersible production platform with liquids storage facilities, with holding capacity of 30,000 cubic metres.


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The Shen Hai Yi Hao (Deepwater 1), built by China's Offshore Oil Engineering Company (COOEC), is being towed to the South China Sea to develop the Lingshui 17-2 gas field.

CNOOC said the unit is scheduled to arrive at the Lingshui gas play in February for commissioning and first gas is expected in June, confirming an Upstream report on 7 January.

The floater features 11,300 square metres of deck space and carries a total steel weight of 33,000 tonnes. The topsides weigh 8480 tonnes.

The topsides is made of 23 deck blocks, 200 oil and gas processing facilities units and living quarters for up to 120 people.

The platform will be anchored to the seabed via 16 legs, while the project also features a cable mooring system and SCR, as well as a 95-kilometre subsea pipeline.

Lingshui 17-2 is being exploited by an 11-well subsea production system, with one manifold in the west and three in the east of the field, all tied back to the semisub production platform.

CNOOC Ltd pegs Lingshui 17-2’s reserves at about 136 billion cubic metres of recoverable gas, with initial production forecast to be 3.25 Bcm per annum of gas and 1400 cubic metres per day of condensate.