Recently, the “Tuna WS 25000” (Haiyang Shiyou 696), China’s first integrated large-scale well stimulation vessel independently designed by Shanghai Ship Design and Research Institute (SDARI) of China State Shipbuilding Corporation for China National Offshore Oil Corporation (CNOOC) Tianjin Branch, successfully completed its sea trials.
This sea trial lasted 17 days, with several core design personnel from SDARI participating in various key testing projects. All of the performance indicators of the vessel met the design requirements, and some key performance indicators exceeded expectations.
Equipped with a full suite of fracturing equipment including fluid supply, blending and sand mixing systems, the vessel features high integration, intelligent operation, large displacement, high power output, substantial storage capacity and enhanced safety.
It is capable of meeting China’s emerging operational demands such as large-scale fracturing operations across all maritime zones as well as batch fracturing operations for multiple offshore wells. Upon delivery, the vessel will be deployed to carry out offshore fracturing stimulation operations for low-permeability reservoirs, providing robust support for CNOOC to make a strong start in the development and implementation of China’s 15th Five-Year Plan.
For years, SDARI has been dedicated to the offshore support vessel sector, continuously enhancing its core brand competitiveness. The company has now developed the Tuna series of vessels, capable of meeting diverse requirements across different sea areas, operations and markets:
- Anchor Handling Tug Supply (AHTS) Vessel Tuna A060/080/100/150/180/200/260 Series
- Platform Supply Vessel (PSV) Tuna P2000/3500/4000/4500/5000 Series
- Survey Vessel Tuna S100/600/1000 Series
- Wind turbine service operation vessel (SOV) Tuna WF60/100 series
- Well Stimulation Vessel Tuna WS25000 series
The Tuna A series is named after the bollard pull of AHTS vessels, the Tuna P series is named after the deadweight tonnage of PSV, the Tuna S series is named after the drilling depth of survey vessels, the Tuna WF series is named after the number of people carried by wind farm service operation vessels, and the Tuna WS series is named after the maximum power of the fracturing pumps on well stimulation vessels.