China National Offshore Oil Corporation recently completed the main body of the world's first 10,000-ton semi-submersible oil storage platform in its Qingdao shipyard in Shandong province, a significant step in China's manufacturing of deep-sea marine engineering equipment.
Weighing about 33,000 tons, the main body is 91.5 meters long, 91,5 meters wide and 59 meters high. Its deck is as large as two standard football pitches.
With a bottom buoyancy tank and four pillars, the maximum displacement of the main body is 110,000 tons, equaling that of three medium-sized aircraft carriers and making it capable of resisting extremely bad offshore weather.
The platform's body has 600,000 meters of welding and more than 800 kilometers of cable.
You Xuegang, general manager of the Lingshui 17-2 offshore gas field development project, said that the main body is a major part of the semi-submersible oil storage platform that will be used in the Lingshui 17-2 offshore oil field, China's first 1,500-meter deep-sea gas field.
It will be the first semi-submersible platform used in the deepest gas exploration in China.
As the platform is being built to high requirements which include the shortest fatigue endurance of 150 years, painting and assembly quality as well as accuracy are strictly controlled.
The Lingshui 17-2 offshore gas field, 150 kilometers away from South China's Hainan Island, was first discovered in 2014. It has been proved that the geological reserve of the field is more than 100 billion cubic meters and goes as deep as 1,500 meters.
The energy resources will be developed by the world's first deep-sea 10,000-ton semi-submersible oil storage and production platform and a 1,500-meter underwater production system.
The exploration is scheduled to start in 2021 and the field is expected to provide 3 billion cubic meters of gas to South China's Guangdong and Hainan provinces and Hong Kong and to meet one-fourth of civil gas consumption needs in the Guangdong-Hong Kong-Macao Greater Bay Area.
(Executive editor: Wang Ruoting)