Red Eye 2G Water-Cut Meter

Quick Links to Information Below

• Red Eye 2G Water-Cut Overview
• How Does the Red Eye 2G Water-Cut Meter Work?
• Red Eye 2G Water-Cut Meter's Unmatched Accuracy
• Improved Gas Void Fraction (GVF) Handling with the Red Eye 2G Water-Cut Meter
• Simplified Installation and Operation of the 2G Water-Cut Meter

Red Eye 2G Water-Cut Meter Highlights

Unmatched accuracy Insensitive to entrained gas Ignores salinity and dissolved gas Easy installation, calibration, and service

• Red Eye 2G Water-Cut Meter Absorption Spectroscopy
• Red Eye 2G Water-Cut Meter Accuracy Curve
• Net Oil Computer & the Red Eye 2G Water-Cut Meter
• Red Eye 2G Water-Cut Meter Configuration
• Simplified Calibration of the Red Eye 2G Water-Cut Meter
• Red Eye 2G Water-Cut Meter Typical Applications
• Specifications of the Red Eye Water-Cut Meter

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• Red Eye 2G Water-Cut Meter

• Red Eye 2G Water-Cut Meter - Russian Version
• Red Eye 2G Water-Cut Meter - Spanish Version

Red Eye 2G Water-Cut Meter Overview

The Red Eye® 2G Water-Cut Meter uses a patented optical sensor technology to accurately measure the full range (0 to 100%) of oil and water concentration in a commingled stream. Its high accuracy across all water-cut levels and easy installation and configuration make this unique meter suitable for numerous applications. The meter can be used alone to measure and report instantaneous water cut, in conjunction with a companion Net Oil Computer (NOC) to perform timed production well tests, or as part of the Red Eye Multiphase Metering System (REMMS).

How Does the Red Eye 2G Water-Cut Meter Work?

The measurement is based on near-infrared absorption spectroscopy where oil and water are easily differentiated. Its predecessor, the original Red Eye Water-Cut Meter, used a single oil-absorbing wavelength and achieved unmatched accuracy at high water-cut levels.

The Red Eye 2G Water-Cut Meter extends this unparalleled performance to lower water-cut measurements by simultaneously measuring multiple wavelengths that include both water and oil absorbent peaks. Scattering effects caused by emulsions, sand, or gas bubbles have the same effect at all wavelengths and as such can be nullified. Furthermore, changing salinity has no effect on the measurement since the water absorption is based on the water molecule itself, not what is dissolved in the water.

Red Eye 2G Water-Cut Meter's Unmatched Accuracy

The Red Eye 2G Water-Cut Meter delivers the needed performance under actual production conditions, not just ideal laboratory environments. Water-cut measurement uncertainties are less than 2% even during changing salinity. For high water cut measurements, the uncertainty is less than 2% of the water-cut which translates to less than 5% error in the net oil measurement.

Improved Gas Void Fraction (GVF) Handling with the Red Eye 2G Water-Cut Meter

Because of multiple wavelength measurements, the ability of the new Red Eye 2G model to handle GVF is greatly improved. GVF up to 5% has no effect on unit accuracy and GVF levels up to 20% have only minimal effect.

Simplified Installation and Operation of the 2G Water-Cut Meter

The insertion style design reduces installation costs, especially for large line size applications. The electronics are mounted directly to the measurement probe so the only field wiring required is for the power and output signal cables. For NOC applications, the Red Eye 2G Water-Cut Meter offers 4 to 20mA or pulse input connections for flow meter input. Internally the signal is measured and made available as a Modbus™ readable parameter. The companion NOC then needs only a two-wire RS-485 connection to the meter for both water cut and flow-rate information

Red Eye 2G Water-Cut Meter Absorption Spectroscopy

The graph shows several bands of infrared wavelengths
that are absorbed by the components of the produced fluids.

Red Eye 2G Water-Cut Meter Accuracy Curve

Net Oil Computer & the Red Eye 2G Water-Cut Meter

The NOC is used for performing production well tests to determine oil and water flow rates. The NOC receives the instantaneous water cut reading from the Red Eye 2G Water-Cut Meter along with a signal for total liquid flow rate and calculates average production rates for oil and water over the user specified test period.

Flow rate can be brought in as a volumetric rate or a mass rate. The NOC converts the mass rate to a volumetric rate using a liquid density calculated from the water-cut reading which is unaffected by GVF.

The user friendly touchpad display provides a simple and intuitive interface for configuration, operation, and data retrieval. The software supports up to 20 independent wells with individual test and purge times. Well tests can be configured to run one time only or with automatic restart and the last 20 test results are stored for easy retrieval. Communication to a host system, via the RS-485 port or Ethernet port, uses Modbus protocol.

Red Eye 2G Water-Cut Meter Configuration

The Red Eye 2G Water-Cut Meter includes RedLine™ configuration software designed for Pocket PCs. The software allows the user to configure communications, perform one-button fluid calibrations, and check system diagnostics. The connection can be done through either of the meter’s communication ports.

Simplified Calibration of the Red Eye 2G Water-Cut Meter

All that is needed is a small, 50-ml, sample of dry oil at atmospheric conditions. The operator puts dry oil from the well to be tested in the sensor slot and pushes one button to calibrate. That’s it!

Red Eye 2G Water-Cut Meter Typical Applications

Well Testing

The Red Eye 2G Water-Cut Meter is typically used downstream from a two phase test separator in the liquid leg. The meter can be combined with a total liquid flow meter and NOC for individual oil and water flow rates.

Individual Well Monitoring

The Red Eye 2G Water-Cut Meter can be used to monitor individual wells and provide continuous real-time, water-cut data. When streams contain free gas (up to 20% gas void fraction) the meter provides unsurpassed performance in accurate determination of oil and water rates.

Group Production at Centralized Facilities

The Red Eye 2G Water-Cut Meter can be used to monitor group production lines as well as individual test lines. The compact insertion style design is very cost effective even for large line sizes.

Dewatering Monitoring Systems for Crude Oil Tanks

When a Red Eye 2G Water-Cut Meter is installed on the discharge line from a tank, the operator can easily identify the rag layer (interface between the oil and water in the tank). The optical sensors of the meter sense very small amounts of oil in the rag layer as it passes through the pipe allowing the operator to shut off the flow from the tank.

Conductivity-type probes do not match the accuracy of the Red Eye 2G Water-Cut Meter because there is such a small difference between the rag layer and the water that floats it. The Red Eye 2G Water-Cut Meter allows water to be transferred with virtually no oil from the tank.

Specifications of the Red Eye 2G Water-Cut Meter