Roxar Salinity Measurement System

The Roxar Salinity Measurement System is designed for the sensitive, real-time measurement of saline water in gas production well streams.

Emerson Industrial Automation says that operators can instantly identify changes in the flow stream and the smallest amounts of saline water at high levels of sensitivity. This enables the operator to take immediate remedial action to prevent threats to production, such as scaling, hydrate formation and corrosion. The onset of formation water and its salinity, if not controlled, can lead to well shutdowns and cost producers millions in unplanned shutdown time.

The system, which is a key element of the Roxar Subsea Wetgas Meter and based on microwave (MW) resonance technology, provides quantitative and qualitative real-time salinity measurements in many types of field conditions — particularly in the high gas volume fraction (GVF) and wet gas flows that characterise wet gas fields.

The Roxar Subsea Wetgas Meter provides individual flow rates of gas, condensate/oil and water. The salinity system consists of a salinity sensor mounted flush with the wall of the meter. The MW resonance technology ensures an instant response to changes to conductivity of the flow stream and can measure water conductivity down to ±0.1 S/m and up to 99.99% GVF with a sensitivity in the range of ±0.004 S/m. Small pockets of formation water leaking into the flow can therefore be detected instantaneously.