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Built to China Classification Society (CCS) rules, Shen Hai Yi Hao has been deployed by field operator China National Offshore Oil Corporation (CNOOC) – China’s largest producer of offshore crude oil and natural gas. CNOOC estimates the Lingshui 17-2’s reserves at about 136Bn cubic metres (bcm) of recoverable gas.
CCS president Mo Jianhui said building Shen Hai Yi Hao marks a ‘giant step forward’ in China’s offshore development capability as it extends the exploration depth from the previous record of 300 m to 1,500 m ultra-deepwater. Additionally, built by China Offshore Oil Engineering Co (COOEC), Shen Hai Yi Hao is China’s first self-developed deepwater FPSO and built to operate 30 years without drydocking, according to Mr Jianhui.
He said CCS provided statutory survey, classification and third-party certification survey services throughout the design, construction and installation of the FPSO.
“Shen Hai Yi Hao is a world first and we are enormously proud of all the team who have worked so hard on this complex and demanding project with our partners CNOOC and COOEC,” he said.
CNOOC project manager for Shen Hai Yi Hao, You Xuegang said the project achieved three world firsts.
“This is the first FPSO to have condensate oil storage in the four semi-submersible columns with a maximum storage capacity of nearly 20,000 m3; the largest span of the semi-submersible truss-type topside in the world of up to 49.5 m and the first wet in-dock semi-stool assembly technology conducted on land.”
Shen Hai Yi Hao’s topsides are made of 23 deck blocks, 200 oil and gas processing facility units and living quarters for 120. The FPSO is anchored to the seabed in water depths of between 1,220 m and 1,560 m via 16 anchor piles, while the project also features a polyester mooring system and SCR, as well as a 95-km 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 semi-submersible production platform.
According to Mr Jianhui, CCS is providing classification services for offshore facilities such as Liuhua cylindrical FPSO, a 330-m deepwater jacket, an ocean exploration drill ship which will promote development of China’s deepwater technology.
