DUET MULTIPHASE FLOW METER

2000 ◽  
Vol 40 (1) ◽  
pp. 492
Author(s):  
G.J. Roach ◽  
M.J. Millen ◽  
T.S. Whitaker
Keyword(s):  
Multiphase Flow ◽  
Gas Flow ◽  
Gamma Ray ◽  
Volume Fraction ◽  
New Technology ◽  
Oil Industry ◽  
Flow Meter ◽  
The North ◽  
Test Loop ◽  
Oil Water

CSIRO Minerals has developed a Multiphase Flow Meter (MFM) for measuring oil, water and gas flow rates in offshore topside and sub-sea oil production pipelines. In 1997 Kvaerner Oilfield Products (KOP) signed an exclusive licence agreement with CSIRO Minerals for production and further development of the dual energy gamma-ray transmission (DUET) MFM. This new technology has the potential to save the oil industry many millions of dollars in capital, operating and maintenance costs. Essentially, the MFM consists of two specialised gamma-ray transmission gauges, pressure and temperature sensors, which are mounted on a pipe spool carrying the full flow of the well stream, and processing electronics. Measurements of the intensities of transmitted gamma rays are made to infer the proportions of oil, water and gas, and flow velocities are determined from cross-correlation of gamma-ray signals.Prototype MFM's have completed several Australian and overseas trials, including an extended four-year trial (1994–1998) on Esso's West Kingfish platform in Bass Strait and Texaco's test loop facility in Humble, Texas. During these and other trials the MFM has determined water cut to accuracies of 2–4%, and liquid and gas flow to accuracies of 5–10%, up to a gas volume fraction (G VF) of 95%. Full production versions of the MFM are presently under construction by KOP, and the first installation is due to take place early in 2000 at Texaco's Captain oilfield in the North Sea. CSIRO Minerals is presently consulting with the Australian oil industry to assess interest in the development of a wet gas MFM, capable of operating at GVF's in excess of 95%

TRIALS OF A MULTIPHASE FLOW METER ON PRODUCTION PIPELINES FROM OIL WELLS

1994 ◽  
Vol 34 (1) ◽  
pp. 101
Author(s):  
G.J. Roach ◽  
J.S. Watt ◽  
H.W. Zastawny ◽  
P.E. Hartley ◽  
W.K. Ellis
Keyword(s):  
Multiphase Flow ◽  
Gamma Ray ◽  
Least Squares Regression ◽  
Mean Flow ◽  
Flow Meter ◽  
Horizontal Section ◽  
Oil Processing ◽  
Production Platform ◽  
Oil Water ◽  
Water Cut

This paper describes trials of a new multiphase flow meter (MFM) on the Vicksburg offshore production platform and at the oil processing facilities on Thevenard Island. The flow meter is based on two specialised gamma-ray transmission gauges mounted on a pipe carrying the full flow of oil, water and gas.Two MFMs were used in both trials, one mounted on a vertical (up flow), and the other on a horizontal, section of a pipeline linking the test manifold to the test separator. Measurements were made on flows of oil/water/gas mixtures from each well, and on combined flows of different pairs of wells.The r.m.s. difference between the flow rates determined by the MFM and by the separator output meter was determined by least squares regression. For the Vicksburg trial, the ratio of r.m.s. difference and mean flow rate was 8.9 per cent for oil, 5.6 per cent for water, 5.2 per cent for liquids, and 8.2 per cent for gas for flows in the vertical pipeline and slightly larger for flows in the horizontal pipeline. For the Thevenard Island trial, the preliminary results for flows in the vertical pipeline show the ratio to be 6.8 per cent for oil, 6.0 per cent for water, 3.4 per cent for liquids, and 5.9 per cent for water cut.

Numerical Simulation of Oil- and Water-Sands Multiphase Flow in Gathered Pipes

2012 ◽  
Vol 557-559 ◽  
pp. 2294-2298
Author(s):  
Yi Xin Pan ◽  
Hong Bing Zhang ◽  
Rong Hua Xie ◽  
Xing Bin Liu
Keyword(s):  
Multiphase Flow ◽  
Volume Fraction ◽  
Low Flow ◽  
Governing Equations ◽  
Water Separation ◽  
Nonlinear Growth ◽  
Sediment Volume ◽  
Oil Water Separation ◽  
Oil Water ◽  
Logging Tool

In the oil mining process, we need to hold flow characteristic for oil- and water-sands, with low-middle volume fraction of the particles in gathered pipes, in order to design logging tool and build interpretation methods for the producing profile. We built governing equations and boundary conditions for the oil- and water-sands based on the three-D k-ε-kp model. The simulation results indicate the sand volume fraction affects the sedimentation quantity and rate obviously. Multiphase flow in the gathered pipe is compartmentalized three sections: oil-water separation section, transition section and full mixing section from entrance to exit and multiphase flow meter need to place in the full mixing section. Sediment mainly settles to the bottom of gathered pipes umbrella in the condition of low flow rate and content of sediment, which has little impact on the internal instrument, but need to clear timely. With the increase of sediment volume and reduce of flow race, the time which multiphase flow in the gathered pipe reached a steady state was nonlinear growth.

Multiphase Flow Induced Vibrations at High Pressure: CFD Analysis of Multiphase Forces

2021 ◽  
Author(s):  
Paul Emmerson ◽  
Mike Lewis ◽  
Neil Barton ◽  
Steinar Orre ◽  
Knud Lunde ◽  
...  
Keyword(s):  
High Pressure ◽  
Multiphase Flow ◽  
Gas Flow ◽  
Production Systems ◽  
Pressure Fluctuations ◽  
High Amplitude ◽  
Operating Pressure ◽  
Cfd Analysis ◽  
Cfd Modelling ◽  
Test Loop

Abstract CFD analysis of a high pressure 2” pipe test loop with water-gas flow was undertaken using three different solvers. Multiphase flow induced forces were predicted on the bends at a range of operating pressures between 10 and 80 barg and compared with forces reconstructed from vibration measurements. Overall the three different CFD solvers predicted consistent results. The fluid forces predicted on the bends of the double U-loop test rig have a good range of values compared to the test reconstructed forces. The forces predicted at low pressure were in line with the experimental reconstructed values, whilst at high pressure all three CFD solvers predicted higher forces. The trend of the forces reducing with increased operating pressure, evident in test, was matched by one of the CFD methods, but less well by the other two. At low operating pressure the forces are dominated by the momentum of the liquid in the multiphase flow, whilst at high pressure the pressure fluctuations and turbulent effects will be more important. All three CFD solvers use VOF methods and above about 40 barg it is possible that they struggle to fully resolve the flow behaviour, which will be more influenced by bubble and droplet entrainment and turbulence. Multiphase flow can induce high amplitude vibrations in piping systems, potentially leading to fatigue failures. CFD modelling offers a potentially powerful tool to provide the flow induced forces required for assessing and diagnosing multiphase flow induced pipework vibration problems in hydrocarbon production systems.

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