The second phase of the "Deep Sea No.1" project has been completed
On September 26th, it was learned from CNOOC that the second phase of the "Deep Sea No.1" project has passed the mechanical completion acceptance and is about to go into production. This marks the completion of China's first deepwater high-pressure gas field development project, representing a major breakthrough in the country's independent construction capacity for deepwater complex oil and gas projects.
The picture shows the newly-built comprehensive processing platform of the second phase of the "Deep Sea No.1" project. (Photo provided by CNOOC
The maximum operating water depth of the second phase of the "Deep Sea No.1" project is nearly 1,000 meters. It has pioneered a brand-new development model of "underwater production system + shallow water jacket processing platform + deep water semi-submersible platform remote control system". A total of 12 deep water gas Wells have been deployed, and a new comprehensive processing platform weighing over 14,000 tons has been built. Five submarine pipelines with a total length of approximately 250 kilometers, four umbilical cables and one underwater production system.
The development and construction of the second phase of the "Deep Sea No.1" project is confronted with multiple Marine engineering challenges such as deep water, high temperature and high pressure. For this reason, the project team has developed deepwater engineering equipment, tackled the problems of deepwater construction under extreme working conditions, independently built key facilities such as a kilometer-level deepwater manifold, and completed the laying of the longest deepwater oil and gas pipeline in China. And it has repeatedly broken the industry record for deepwater oil and gas development operations.
The second phase of the "Deep Sea No.1" project is approximately 70 kilometers away from the "Deep Sea No.1" energy station. It was discovered through exploration in 2015 that the proven geological reserves of natural gas exceed 50 billion cubic meters, and the peak annual output of natural gas exceeds 1.5 billion cubic meters.