China’s homegrown deep-water jacket ‘Haiji No 2’ to be installed to help offshore oil, gas exploration

The Haiji-1 deepwater jacket was installed at sea in south China's Guangdong Province. (Photo: the Offshore Oil Engineering Co., Ltd/Xinhua)

China's independently designed and constructed deep-water submarine jacket platform "Haiji No 2", which is believed to the largest of its kind in Asia, has broken multiple Asian records after entering service, China Media Group reported on Tuesday.

Citing the China National Offshore Oil Corp (CNOOC), its developer, the report said the deep-water jacket platform will be loaded onto a ship at the Gaolan Port in Zhuhai, South China's Guangdong Province, and be transported to the Pearl River Mouth Basin for offshore installation.

China is ramping up efforts to build mega infrastructure while improving innovation capabilities in a bid to ensure the country's energy security. With "Haiji No 2" installation, the country's offshore marine engineering is expected to achieve high-level technological self-reliance and improvement.

Acting as a "foundation" supporting fixed offshore oil and gas platform where seabed conditions are challenging, the deep-water jacket can provide support for pipelines, subsea structures of an offshore platform. The jacket is a widely used marine oil and gas development equipment in the world, according to the report.

Notably, it has set a record in terms of the height and weight of steel piles in Asia, with a total height of 338.5 meters and a total weight of 37,000 tons, and represents the first case in China's marine engineering to use domestically produced high-strength steel piles to build large-scale offshore oil and gas equipment.

Meanwhile, the construction of "Haiji No 2" has set records for operating at depth, and construction speed of such equipment in Asia reflects that China has become a top player in the world to build large deep-water jacket platforms, the CNOOC told the CMG.

The platform will be used for the development of the Liuhua 11-1 and Liuhua 4-1 offshore oil fields, in the deep waters of the South China Sea, media reported.

China has fast tracked deep-sea oil and gas exploration in the past decade. Its predecessor, "Haiji No 1" platform, which entered operation in 2022, marked the first time that China exploited offshore oil and gas employing such a model. It turned out to significantly bring down engineering cost and boost oil recovery and economic efficiency.

In 2021, the Shenhai Yihao, the world's first 100,000-ton deep-sea semi-submersible oil production and storage platform, was put into operation, signaling that China's offshore oil and gas exploration capacity had entered an advanced level.