Table 5 Measurement uncertainty and repeatability of key parameters.
Parameter | Measurement method/source | Accuracy (±) | Repeatability |
|---|---|---|---|
Wellhead pressure (Pwh) | Pressure gauge/sensor at wellhead | ± 0.5% of full scale ( ≈ ± 5 bar) | Within ± 2% |
Choke size (D64) | Calibrated choke bean size | ± 0.1 mm | High (fixed orifice) |
Liquid flow rate (QL) | Separator test/calibrated flow meter | ± 2% of reading | ± 3% across repeated runs |
Gas–liquid ratio (GLR) | Calculated from gas and liquid test separators | ± 3% | ± 3–5% |
BS&W content | Standard lab analysis (centrifuge/ASTM method) | ± 0.5 vol% | ± 1 vol% |
