Optimising new oil terminal in Finnmark
The Barents Sea Oil Infrastructure (BSOI) is currently in the concept phase and consists of four four production fields (Goliat, Johan Castberg, Alta/Gotha and Wisting) with four different oil qualities. A dedicated fleet of winterized shuttle tankers will transport oil from the four fields to a new onshore receiving terminal at Veidnes, in Nordkapp municipality in Finnmark. The oil will be stored in tanks at Veidnes awaiting the arrival of export tankers which will transport the oil to the market.
In cooperation with Statoil, Safetec has developed a detailed simulation model that simulates the entire supply chain in order to identify bottlenecks and verify the proposed tank size designs, volumes, number of shuttle tankers and number of jetties.
The simulation model has accounted for a variety of operational concepts, such as weather conditions, oil qualities and sailing conditions:
- Bad weather: This is based on detailed weather observations from the last 30 years enabling detailed modelling of specific weather (waves) windows where offloading to shuttle tankers is possible. These weather windows are modelled both at the offshore locations and (wind limitations) at Veidnes.
- Different oil qualities: The model optimises the export of oil to ensure that only oil within specification is exported to market. For some proposed tank configurations it is not possible to ensure that 100% of the exported oil is within specification, in which case the model provides detailed feedback on how much off-spec oil is exported.
- Sailing durations, tug boats and pilots: The sailing times from Veidnes to each producing field is modelled in detail, giving an overview of the shuttle tanker utilisation. The model also accounts for tug boats required to moor at Veidnes.
The project has supplied Statoil with a simulation tool to assist in proposing the number and sizes of tanks required at Veidnes. Statoil may, without prior knowledge to the software used, freely modify specific parameters and re-run the simulation model to study the impact input parameters have on the results.
Some of the parameters that can be modified are;
- the number of tanks and tank sizes at Veidnes
- pump offloading rate
- updated production rates from offshore fields
- number of tug boats and shuttle tankers in fleet and
- changes in oil quality over field life.
The input parameters, along with the logistics model provide results such as;
- expected number of shutdowns offshore due to late arrival of shuttle tanker,
- jetty occupancy at Veidnes
- shuttle tanker utilisation
- export tanker utilisation
- onshore tank utilisation and
- percentage of off-spec oil export
Safetec’s project manager Torbjørn Lilleheier says; “This has been a challenging and very interesting project where we have worked closely with the client to ensure that all relevant aspects of the logistics chain are captured. This was essential in order to provide the best possible decision basis for construction.”
Safetec delivers simulation and optimisation studies for logistic systems and other technical systems for a variety of industries and applications. Contact Stefan Isaksen, discipline responsible, or visit our webpage at https://www.safetec.no/en/services/reliability-and-availability/system-optimization/.