Lingshui 17-2

Lingshui 17-2 Gas Field Development Profile

Location and Geology

• The Lingshui 17-2 gas field is located in the western part of the northern South China Sea, approximately 150 km off the coast of Sanya, Hainan province, China. It is situated in the northern Qiongdongnan Basin.
• The field is characterized by water depths of up to 1,560 meters, making it the first deep-water independent gas field development in China.

Discovery and Reserves

• The Lingshui 17-2 gas field was discovered in 2014.
• It is estimated to hold in excess of 100 billion cubic meters (bcm) of gas reserves in place.

Development Details

• The development of the Lingshui 17-2 gas field is led by China National Offshore Oil Corporation (CNOOC).
• The project involves 11 development wells, a subsea production system, and a semi-submersible production platform.
• The subsea production system includes 11 horizontal subsea trees, four manifolds, topside and subsea control systems, and a vertical tie-in connection system. The overall length of the static and dynamic umbilicals required for the project exceeds 70 km.
• The field development also includes the installation of subsea flowlines, two 10-inch-diameter steel catenary production risers (SCR), and two 12-inch-diameter production risers for connecting the subsea flowlines to the semi-submersible production platform.

Infrastructure and Export

• The gas output from the platform is exported through a 95 km-long, 18-inch-diameter pipeline.
• The semi-submersible production platform has a condensate storage capacity of approximately 20,000 cubic meters.
• The project is expected to supply more than three billion cubic meters (bcm) of gas per year to Guangdong, Hong Kong, and Hainan.

Contractors and Suppliers

• Aker Solutions: Supplied the subsea production system and umbilicals, with a contract worth more than £158.5 million ($206.3 million) awarded in October 2018. Kongsberg Digital was sub-contracted to provide a production management system (PMS) for the project.
• Offshore Oil Engineering (COOEC): A subsidiary of CNOOC, involved in the development of the semi-submersible production platform. COOEC also contracted Subsea 7 for the transportation and installation of steel catenary risers.
• Subsea 7: Awarded a contract worth up to £112.5 million ($150 million) for the transportation and installation of five steel catenary risers.
• Allseas: Contracted for the installation of the export pipeline, flowlines, monoethylene glycol (MEG) lines, and pipeline end terminations (PLETs). Allseas’ pipelaying vessel Audacia and trenching support vessel Calamity Jane were deployed for the project.
• Tenaris: Supplied approximately 7,200 tons of pipe for the steel catenary risers.
• InterMoor: Contracted to install mooring systems for the Lingshui 17-2 floating production facility in May 2019.
• Oil States: Provided deep-water steel catenary riser FlexJoint™ assembly packages. The project involved coordination across multiple Oil States facilities globally.
• MacGregor: Supplied the on-vessel mooring systems and riser pull-in system for the Lingshui 17-2 deep-water floating production unit.
• Rodelta: Supplied pumps, including API OH2 pumps, API VS6 pumps, and vertical in-line pumps for the project in 2020.

Project Timeline

• Discovery: 2014
• Development well drilling programme: Started in December 2019
• Arrival of semi-submersible production platform: February 2021
• Expected production start: First half of 2021
• Peak production: Achieved in 2022, with the field recovering 10.49% of its total recoverable reserves by that time.

Production Capacity

• The Lingshui 17-2 gas field is expected to produce up to 58,000 barrels of oil equivalent (boe) per day.

This project marks a significant milestone in China's deep-water gas exploration and production capabilities, highlighting the country's growing expertise in ultra-deepwater projects.