Red EyeÂ® 2G Water-cut Meter

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Red Eye 2G Water-cut MeterThe Red Eye 2G water-cut meter uses patented optical sensor technologyto accurately measure the full range of water cut (0 to 100%) in acommingled oil and water stream. Very high accuracy across all watercutlevels and easy installation and configuration make this unique metersuitable for numerous applications. The meter can be used in stand alonemode to measure and report instantaneous water cut and in conjunctionwith the Red Eye net oil computer (NOC) to perform timed production welltests, or as part of the Red Eye multiphase metering system (REMMS).How Does It Work?The measurement is based on near-infrared absorption spectroscopywhere oil and water are easily differentiated.The water-cut meter achieves unmatched accuracy at high water-cut levelsas well as lower water-cut measurements by simultaneously measuringmultiple wavelengths that include both water and oil absorption peaks.Absorption Spectroscopy1512Waterabsorption96Oil BOil A3Condensate0800 1000 1200 1400 1600 1800 2000wavelength (nm)The graph shows several bands of infrared wavelengths that are absorbed by thecomponents of the produced fluids.Unmatched Accuracy in Production EnvironmentsThe Red Eye 2G water-cut meter delivers high accuracy performanceunder actual production environments, not just in laboratory conditions.Water-cut measurement uncertainties are less than 2% even withsituations of varying salinity and when entrained gas is present.2 © 2008 Weatherford. All rights reserved.
Red Eye 2G Water-cut MeterGas Volume Fraction (GVF) EffectsThis meter is designed to handle real-world issues such as entrainedgas. By using the technique of multiple wavelength measurements asemployed by the Red Eye water-cut meter, great tolerance to varying gasconditions is possible. GVFs of up to 5% have no effect on unit accuracyand up to 20% have only minimal effect.Emulsion Handling and Salinity EffectsThe Red Eye 2G water-cut meter works with emulsions as well as fluidsthat separate easily. Emulsions tend to cause light scattering in additionto absorption. The scattering is equal at all wavelengths whereas theabsorption is strongly dependent on wavelength. The water-cut meternulls out the scattering effect and measures the absorptions which aredirectly related to the water cut. Salinity has no effect on the measurementsince water absorption is based on the water molecule itself, not thedissolved salts. Accuracy is, therefore, unaffected by different andchanging salinities.A local two-line display provides aninstantaneous water-cut reading, activewell number and instrument statusinformation for user convenience.Collector OpticsProbe AssemblySapphire WindowSapphire WindowNIR Emitter© 2008 Weatherford. All rights reserved.3
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Red EyeÂ® 2G Water-cut Meter

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