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3 Phase Flow Meter: Roxar Oil, Gas, and Water Mixed Stream Diagnostics
Quick Answer: A 3 phase flow meter measures oil, gas, and water fractions in one pipe without a test separator. Roxar multiphase meters are common for well testing and production allocation on offshore and onshore fields. Silver Automation Instruments supplies alternative flow measurement devices for mixed stream diagnostics, including Coriolis mass flow meters, electromagnetic flow meters, and ultrasonic meters.
What a 3 Phase Flow Meter Does on a Wellhead
A 3 phase flow meter reports oil flow rate, gas flow rate, and water flow rate at the same time. On a live wellhead, this removes the need to wait for a test separator. The meter handles slug flow, gas volume fraction changes, and water salinity shifts. Typical operating ranges cover pipe sizes from DN50 to DN150, pressures from 10 bar to 345 bar, and temperatures up to 120 °C. Most engineers skip the theory and check whether the meter can hold calibration for at least 30 days. We have seen wells where the gas volume fraction swings from 0.10 to 0.75 within one hour. That is exactly the type of unstable flow a 3 phase flow meter must handle.
Roxar Oil, Gas, and Water Mixed Stream Diagnostics in Practice
Roxar multiphase meters use a venturi for total flow, a gamma densitometer for phase fractions, and impedance sensors for water conductivity. Field diagnostics usually include differential pressure, line temperature, water liquid ratio, and gas volume fraction trends. A customer in Nigeria operated a Roxar 2600 style meter on a DN150 flowline with 90 percent water cut. The diagnostics showed gas volume fraction peaks during slug arrival. That early warning helped the operator adjust choke settings before liquid carryover reached the separator. In that same region, production allocation requires daily well testing. A continuous 3 phase flow meter removes manual sampling and reduces deferred production by about two hours per well.
When You Do Not Need a Full 3 Phase Flow Meter
Not every oil and gas installation needs a multiphase meter. If your flowline splits into liquid and gas streams, separate meters often cost less and are easier to maintain. For liquid only lines, a Coriolis mass flow meter from Silver Automation Instruments measures mass flow and density in one device. It works from 0 to 250,000 kg/h and handles viscosity up to 500 cP. For produced water lines, an electromagnetic flow meter with PTFE liner and 316L electrodes gives reliable readings when conductivity stays above 20 µS/cm. For dry or wet gas lines, a vortex flow meter with built in PT100 temperature sensor handles gas flow from 2 kg/h to 50,000 kg/h. In practice, most small wellhead skids in Australia and Vietnam combine a Coriolis meter for liquid and a vortex meter for gas. That setup gives net oil, net water, and gas flow without the cost of a full multiphase unit.
Alternatives from Silver Automation Instruments
Silver Automation Instruments supplies flow instruments that support oil, gas, and water mixed stream diagnostics. Options include Coriolis mass flow meters from DN15 to DN200, pressure ratings up to 4
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Field Cases from Southeast Asia and Latin America
A gas processing plant in Indonesia needed a meter for a condensate and water line at 55 bar and 40 °C. We supplied a Coriolis mass flow meter with accuracy of 0.2 percent of rate. It measured liquid mass flow from 5,000 kg/h to 45,000 kg/h. A water injection station in Peru used a DN100 electromagnetic flow meter to measure 120 m³/h of produced water at 60 °C. The PTFE liner and 316L electrodes prevented corrosion from saline water. A crude dehydration unit in Australia replaced a test separator with a Coriolis meter for oil and a vortex flow meter for off gas. The operator cut well testing time by two hours per well and started seeing real time water cut trends. Because these sites send data to a central SCADA system, 4 to 20 mA HART output was a key requirement.
How to Request a 3 Phase Flow Meter Recommendation
Send your operating data to Silver Automation Instruments. Include pipe size (DN), pressure (bar), temperature (°C), oil density or API gravity, water cut range, gas volume fraction, salinity in ppm, and flow range in m³/h or kg/h. Our engineers will recommend a full multiphase meter alternative or a set of separate flow meters for your well test or allocation skid. Contact us by Tel: +86-135-1213-1526, WhatsApp: 86-135-12131526, WeChat: +86 13512131526.
FAQ: 3 Phase Flow Meter and Roxar Mixed Stream Diagnostics
What is the difference between a Roxar 3 phase flow meter and a test separator?
A Roxar meter collects oil, gas, and water flow data in real time without separating phases. A test separator needs stable residence time and manual sampling.
Can Silver Automation Instruments supply a Roxar 3 phase flow meter?
We do not manufacture Roxar branded meters. We supply alternative flow instruments for similar applications, including Coriolis, electromagnetic, vortex, and ultrasonic meters.
What is the typical accuracy of a 3 phase flow meter for oil, gas, and water?
Most multiphase meters achieve 2 to 5 percent relative accuracy for each phase, depending on gas volume fraction and water salinity. Liquid phase accuracy can be better when using a Coriolis meter on a test separator.
Which pipe sizes fit a Roxar 3 phase flow meter?
Common sizes are DN50 to DN150 for wellhead installations. Larger sizes up to DN600 exist for high production lines, but installation cost and gamma source licensing affect selection.
How do I get a quotation for a mixed stream flow measurement system?
Send pipe size, pressure, temperature, flow range, and fluid properties to Silver Automation Instruments by phone, WhatsApp, or WeChat. The contact numbers are listed above.
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