|LOCATION:||Exmouth Sub-Basin, Western Australia|
The Ningaloo Vision Upgrade Project comprises modifications to the Ningaloo Vision Floating Production, Storage and Offloading vessel (FPSO), which is operating on the Van Gogh oilfield, and development of the neighbouring Coniston and Novara oilfields which will be tied into the existing Van Gogh subsea infrastructure.
The Ningaloo Vision is serviced by two 100% capacity fire pumping systems, each system consisting of a lift pump and a pressure pump. The pressure delivered by these pumps is now about 1 bar lower than their original rated pressure at the rated capacity.
Investigations to remedy this drop in pressure have improved performance but have not been able to achieve design capacity.
The fire fighting system is extensive and covers 22 zones; twelve of which are serviced by firewater & foam.
The project required re-modeling of the majority of existing pipework.
The analysis enabled limiting the necessary changes to modifying orifice plates and changing a minimal number of spray nozzles in affected areas.
Working with client Apache Energy (now APA Corporation), DBM Vircon was requested to perform a pipe network analysis, to determine the impact of the lower pressure, for the rate determining case of Zone 14 (Module 1A) plus adjacent modules, foam system and hydrants.
The scope of the report was to:
DBM Vircon was subsequently requested to investigate: