Construction of all platforms for Phase 2 of the world’s largest metamorphic rock oilfield project has been completed

On June 16, with the successful loading of the last platform onto a vessel in Binhai New Area, Tianjin, the onshore construction of all platforms for the Phase 2 development of the Bozhong 26 6 oilfield – the world’s largest metamorphic rock oilfield – was completed, laying a solid foundation for the field to commence production as scheduled.

Located in the central Bohai Sea, the Bozhong 26 6 oilfield has its reservoirs in Archean buried hill metamorphic rocks at depths exceeding 4,500 metres. It is the world’s largest metamorphic rock oilfield, with cumulative proved geological reserves of over 200 million cubic metres of oil and gas. Phase 1 of the project was officially put into production in February last year. Phase 2 will install two new unmanned wellhead platforms offshore, each consisting of a jacket and topsides. The two wellhead platforms just completed are designed for unmanned operation.

During the construction of the platform topsides, the project leveraged the intelligent manufacturing model of CNOOC’s Tianjin Intelligent Manufacturing Base and actively promoted integrated construction. The project introduced welding robots, and through tooling modifications and program optimisation, welding efficiency was increased by 20%.

As a key CO₂ capture and utilisation demonstration project planned by CNOOC in the Bohai oilfields, and a major support for research on geotechnical properties and bearing capacity in the Bohai Sea, the Bozhong 26 6 oilfield carries multiple missions including energy supply security, green transformation and scientific research. It is of great significance for ensuring energy security in the Beijing Tianjin Hebei region and the Bohai Rim area.

At present, the two platforms have set sail for the central Bohai Sea to carry out offshore installation operations.

The extraction of oil and natural gas cannot be achieved without separation equipment.

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