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US 12,007,263 B2Granted
Method and apparatus for determining WLR and WVF in wet gas and multiphase flows using an electromagnetic sensor
AssigneeSchlumberger Technology Corporation
InventorsCheng-Gang Xie, Massimiliano Fiore
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Abstract
Embodiments described herein provide methods and apparatus to determine water-to-liquid ratio and water volume fraction for high gas-volume-fraction wet-gas flows or multiphase flows.
Claims20
A method, comprising:
- obtaining a plurality of measurements of electromagnetic properties of a multiphase fluid mixture, from which at least one of permittivity or conductivity can be determined, at an electromagnetic sensor location located at or downstream from a mixing device;
- obtaining an average, maximum, and minimum of the plurality of measurements at the electromagnetic sensor location over a time period;
- and
- determining a liquid fraction of the multiphase fluid mixture at the electromagnetic sensor location based on the average, maximum, and minimum of the plurality of measurements at the electromagnetic sensor location over the time period.
1 more element
A method, comprising:
- obtaining a plurality of permittivity and conductivity measurements from a flowing multiphase fluid mixture at an electromagnetic sensor location located at or downstream a mixing device;
- obtaining an average, maximum, and minimum of the plurality of permittivity measurements at the electromagnetic sensor location over a time period and of the plurality of conductivity measurements at the electromagnetic sensor location over the time period;
- determining a liquid fraction of the flowing multiphase fluid mixture at the electromagnetic sensor location based on the average, maximum, and minimum of one or both of the plurality of permittivity measurements at the electromagnetic sensor location over the time period and the plurality of conductivity measurements at the electromagnetic sensor location over the time period;
- and
- determining a water-to-liquid ratio of the flowing multiphase fluid mixture based on the liquid fraction.
2 more elements
A method, comprising:
- repeatedly measuring permittivity and conductivity of a multiphase fluid using an electromagnetic sensor with a sampling rate of at least 1 kHz to obtain at least 100 measurements at an electromagnetic sensor location over a time period;
- obtaining an average, maximum, and minimum of the permittivity measurements and of the conductivity measurements at the electromagnetic sensor location over the time period;
- determining a liquid fraction from the average, maximum, and minimum of one or both of the permittivity measurements and the conductivity measurements at the electromagnetic sensor location over the time period;
- and
- determining a water-to-liquid ratio of the multiphase fluid based on the liquid fraction and based on one or both of the permittivity measurements and the conductivity measurements.
2 more elements
Dependencies are inferred from the claim text.