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US 12,480,792 B2Granted
Carbon dioxide multiphase flow measurement based on dielectric permittivity
AssigneeSchlumberger Technology Corporation
InventorCheng-Gang Xie
Life of this patent
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Abstract
Methods and apparatus for determining mass flow rate of a CO2 rich stream using dielectric permittivity are described. A method herein measures a dielectric permittivity of a CO2 rich stream; determines a density of the CO2 rich stream from the measured dielectric permittivity; determines a viscosity of the CO2 rich stream from the measured dielectric permittivity; measures a pressure drop of the CO2 rich stream flowing through a flow restriction; and determines mass flow rate of the CO2 rich stream using the measured pressure drop, the determined density, and the determined viscosity.
Claims8
A method for a flow measurement device, comprising:
- restricting a flow of a CO2 rich stream flowing in a flow pathway of the flow measurement device using a flow restriction in the flow pathway of the flow measurement device;
- disposing a first microwave transmitter-receiver pair respectively opposing each other across the flow pathway on an interior surface along a first diameter of the flow pathway at an outlet side of the flow restriction in the flow pathway of the flow measurement device;
- disposing a second microwave transmitter-receiver pair respectively opposing each other across the flow pathway on the interior surface of the flow pathway along a second diameter of the flow pathway, the second diameter intersecting the first diameter;
- disposing a differential pressure instrument across the flow restriction in the flow pathway of the flow measurement device;
- measuring, by the first microwave transmitter-receiver pair and the second microwave transmitter-receiver pair, a dielectric permittivity of the CO2 rich stream flowing in the flow pathway of the flow measurement device;
- determining, by the flow measurement device, a density of the CO2 rich stream from the measured dielectric permittivity;
- determining, by the flow measurement device, a viscosity of the CO2 rich stream from the measured dielectric permittivity;
- measuring, by the differential pressure instrument across the flow restriction in the flow pathway, a pressure drop of the CO2 rich stream flowing through the flow restriction;
- and
- determining, by the flow measurement device, a mass flow rate of the CO2 rich stream using the measured pressure drop, the determined density, and the determined viscosity.
7 more elements
A flow measurement device, comprising:
- a flow pathway including an interior surface;
- a flow restriction in the flow pathway, the flow restriction being configured to restrict a flow of a CO2 rich stream flowing in the flow pathway;
- a first microwave transmitter-receiver pair respectively opposing each other across the flow pathway on an interior surface along a first diameter of the flow pathway at an outlet side of the flow restriction in the flow pathway of the flow measurement device, the first microwave transmitter-receiver pair being configured to measure a dielectric permittivity of the CO2 rich stream flowing in the flow pathway;
- a second microwave transmitter-receiver pair respectively opposing each other across the flow pathway on the interior surface of the flow pathway along a second diameter of the flow pathway, the second microwave transmitter-receiver pair being configured to measure the dielectric permittivity of the CO2 rich stream flowing in the flow pathway, the second diameter intersecting the first diameter;
- a differential pressure instrument disposed across the flow restriction in the flow pathway, the differential pressure instrument being configured to measure a pressure drop, across the flow restriction, of the CO2 rich stream flowing through the flow restriction;
- and
- a digital processing system configured to:
- determine a density of the CO2 rich stream from the measured dielectric permittivity;
- determine a viscosity of the CO2 rich stream from the measured dielectric permittivity;
- and
- determine a mass flow rate of the CO2 rich stream using the measured pressure drop, the determined density, and the determined viscosity.
8 more elements
Dependencies are inferred from the claim text.