ABSTRACT

Sigyn Vest is a gas condensate field using multiphase meters measuring gas and liquid flowrates at elevated pressure and temperature. Flowrates must be reported at export conditions. An equation of state based online PVT package is used to convert from meter to export flowrates. The fiscal allocation is based on these rates.

The composition of the produced fluid varies with reservoir pressure. A base fluid is continuously fine-tuned to match the measured gas/condensate ratio at meter conditions.

The gas and condensate flowrates, and densities of the export streams, are calculated using Kfactors representing the topside process.

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