McDermott has completed the largest and heaviest central platform topside float-over installation offshore Vietnam at the Sao Vang and Dai Nguyet (SVDN) development that is operated by Japan’s Idemitsu Kosan.
McDermott said it has finished the transportation and installation subcontract of the Sao Vang and Dai Nguyet field gas and condensate developments in the Nam Con Son Basin, offshore Vietnam. The central processing platform weighed 14,500 metric tonnes and Vietnam’s largest jacket was launched in water 113 metres deep.
The EPCIC contractor was PetroVietnam Technical Services Corporation Mechanical & Construction (PTSC M&C). The subcontract was awarded to McDermott by PetroVietnam Technical Services Corporation (PTSC).
“SVDN is another great example of our One McDermott Way execution model that utilises best-in-class resources from our offices in Kuala Lumpur, Dubai and Houston for engineering and project management,” said Mahesh Swaminathan, Senior Vice President for Asia Pacific. “A successful and safe completion of the project, particularly during a global pandemic, is an outstanding achievement for the team and the customer.”
Completion of campaign one included a jacket launch using McDermott’s Derrick Barge 30 (DB30) in water depth of approximately 372 feet (113.4 meters). At 12,600 metric tons, it is the heaviest and largest jacket launched in Vietnam at that water depth, said McDermott.
Campaign two included the largest float-over installation of a central processing platform topside in Vietnam, weighing 14,500 metric tons. The installation was achieved through a tight-slot float-over with less than four inches of clearance on either side, added McDermott.
The SVDN development sits in Blocks 05-1b and 05-1c in the Nam Con Son Basin. It is 350km south-east of the Ho Chi Minh City.
The field’s gas output is estimated at 1.5 billion cubic metres (bcm) of gas per year. This is equivalent to about 15% of the total gas output produced by the country.
Japanese petroleum company Idemitsu Kosan operates the Sao Vang-Dai Nguyet field and owns 43.08% stake in it. Other partners include Teikoku Oil (36.92%) and PetroVietnam (20%).