Important breakthrough!, South China Sea Oil and Gas | Pipeline | South China Sea
On June 22nd, the key control project of the second phase of the "Deep Sea One" ultra deep water atmospheric field - the installation of a 20 inch diameter and total length 115.5 kilometers subsea oil and gas long-distance pipeline was completed. This is the longest deepwater oil and gas pipeline in China, marking an important breakthrough in the construction capacity and deepwater equipment technology of China's deepwater long-distance subsea pipelines.
The second phase of the "Deep Sea No.1" project is about 130 kilometers away from Sanya, Hainan. It is China's first deep-water high-pressure gas field, with a maximum operating depth of nearly 1000 meters in the area. The oil and gas extracted from the formation are complex, with high temperature and pressure, and conventional materials of submarine pipes cannot meet production needs. Hou Jing, Chief Engineer of Phase II Project, introduced that this submarine pipeline is specially designed for the mixed transportation of high-temperature, high-pressure, and strongly corrosive oil and gas flow. The pipeline design pressure can reach 38.8 megapascals, capable of transporting oil and gas flow at a high temperature of 120 degrees Celsius, with a maximum wall thickness of 38 millimeters, setting a new record for the wall thickness of China's offshore pipelines.
As of now, China has laid over 9000 kilometers of offshore oil and gas pipelines, which is equivalent to the distance of the Shanghai to Paris route. After years of technological breakthroughs, China has built a pipeline laying vessel equipment represented by the first 3000 meter deepwater pipeline laying crane ship in Asia, "Offshore Oil 201," with operational capabilities ranging from shallow and deep water to ultra deep water. With the successful completion of ultra deep water submarine pipelines represented by "Deep Sea One", China's submarine pipeline engineering equipment and technical capabilities have reached the international advanced level.
It is reported that the proven geological reserves of natural gas in the second phase of the "Deep Sea One" project reach 50 billion cubic meters. After being put into operation, the peak annual production of the "Deep Sea One" atmospheric field can be increased from 3 billion cubic meters to 4.5 billion cubic meters, making it an important gas source to ensure China's energy security.