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US 11,377,949 B2Granted
Multiphase flow metering
AssigneeSchlumberger Technology Corporation
InventorsMustapha Abbad, Dominic Joseph Brady, Patrice Ligneul, Stephen Dyer
Life of this patent
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Abstract
Multiphase flow metering is provided. In one possible implementation, a multiphase flow measurement system includes at least one reference temperature sensor at a first position configured to measure a first temperature of a multiphase flow. The multiphase flow measurement system also includes at least one heated temperature sensor at a second position downstream of the reference temperature sensor configured to excite the multiphase flow and measure a second temperature of the multiphase flow.
Claims18
A multiphase flow measurement system comprising:
- a Venturi nozzle for accepting and mixing a multiphase flow upstream located in a production tubing;
- a differential pressure measurement sensor configured to measure a change of pressure of the multiphase flow from an inlet of the Venturi nozzle to a throat of the Venturi nozzle;
- at least one reference temperature sensor located along the production tubing at a first position that is downstream of the Venturi nozzle and configured to measure a first temperature of the multiphase flow;
- at least one heated temperature sensor located along the production tubing at a second position that is downstream of the reference temperature sensor, the at least one heated temperature sensor configured to excite the multiphase flow and measure a second temperature of the multiphase flow, wherein a cross-sectional shape along a length of the production tubing from the first position to the second position is substantially the same;
- and
- a control system configured to receive the measured first temperature of the multiphase flow, the measured second temperature of the multiphase flow, and the change of pressure of the multiphase flow from the inlet of the Venturi nozzle to a throat of the Venturi nozzle, and to calculate phase flow characteristics of the multiphase flow based on the measured first temperature of the multiphase flow, the measured second temperature of the multiphase flow, and the change of pressure of the multiphase flow, wherein the phase flow characteristics comprise the presence of gas in the multiphase flow, the total flow rate of the multiphase flow, and the individual phase volume fractions within the multiphase flow.
3 more elements
A multiphase flow measurement system comprising:
- production tubing through which a multiphase flow can be directed, the tubing including an intake end for accepting the multiphase flow;
- a Venturi nozzle for accepting the multiphase flow, the Venturi nozzle being between the intake end and a first position in the production tubing;
- a pressure change sensor configured to measure a difference in pressure in the multiphase flow between an intake of the Venturi nozzle and a throat of the Venturi nozzle;
- one or more reference temperature sensors located along the production tubing at the first position downstream of the intake end, the one or more reference temperature sensors being configured to measure a first temperature of the multiphase flow;
- one or more heated temperature sensors located along the production tubing at a second position that is downstream of the first position, the one or more heated temperature sensors being configured to heat up the multiphase flow and measure a second temperature of the multiphase flow, wherein a cross-sectional shape along a length of the production tubing from the first position to the second position is substantially the same;
- and
- a control system configured to receive the measured first temperature of the multiphase flow, the measured second temperature of the multiphase flow, and the change of pressure of the multiphase flow from the inlet of the Venturi nozzle to a throat of the Venturi nozzle, and to calculate phase flow characteristics of the multiphase flow based on the measured first temperature of the multiphase flow, the measured second temperature of the multiphase flow, and the change of pressure of the multiphase flow, wherein the phase flow characteristics comprise the presence of gas in the multiphase flow, the total flow rate of the multiphase flow, and the individual phase volume fractions within the multiphase flow.
4 more elements
A computer-readable tangible medium with instructions stored thereon that, when executed, direct a processor to perform acts comprising:
- receiving first temperature measurements associated with one or more passive resistance temperature detectors measuring a first temperature of a multiphase flow, the one or more passive resistance temperature detectors located along a production tubing at a first position;
- receiving second temperature measurements associated with one or more heated resistance temperature detectors measuring a second temperature of the multiphase flow, the one or more heated resistance temperature detectors located along the production tubing at a second position, wherein a cross-sectional shape along a length of the production tubing from the first position to the second position is substantially the same;
- receiving pressure change information associated with a difference in pressure in the multiphase flow between an intake and a throat of a Venturi nozzle;
- and
- utilizing the first temperature measurements, the second temperature measurements, and the pressure change information to calculate one or more phase flow characteristics of the multiphase flow, wherein the phase flow characteristics comprise the presence of gas in the multiphase flow, the total flow rate of the multiphase flow, and the individual phase volume fractions within the multiphase flow.
2 more elements
Dependencies are inferred from the claim text.