Flow measurement of natural gas at the outlets of separators on an offshore platform 

Engineers on a chinese Offshore platform in the Zhaodong oilfield consulted FLEXIM as they had doubts about the accuracy of the readings from their orifice flow meters installed on the separator's outlet.

On this particlaur Offshore platform, three separators are separating the crude oil-gas mixture coming from the wellheads. The natural gas streams on the outlets of these separators are measured by orifice meters. As the readings of these meters were not matching the process, the platform engineers became suspicious. 

After checking the flow rates of the orifice meters with the portable FLUXUS® G601, their suspicions proved to be true.

The orifice meters readings differed significantely from the measuring values of the FLUXUS G601, which was matching the expected process flow rates. The FLUXUS G601 was able to accurately determine the flow rates at low pressurized gas streams - also thanks to multi-diagnostic tool of the FLUXUS G601, specifying wheter the meter is accurately positioned or not.

Advantages of flow measurement with FLUXUS:

• Accurate monitoring of gas flow rates at low pressure conditions (8 bar)
• Fast and easy set-up and determination of the incorrect orifice meter readings
• FLUXUS could be used as a calibration tool for the orifice meters