Methods and apparatus for determining downhole fluid parameters
AssigneeSchlumberger Technology Corporation
InventorsAbdur Rahman Adil, Elena Borisova, Tullio Moscato
Life of this patent
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Abstract
Methods for determining downhole fluid parameters include disposing apparatus including a sensor in a fluid in a wellbore. The sensor includes a heater and a temperature sensor, and the fluid is flowing at a velocity of about zero centimeters per second to about ten centimeters per second. The fluid includes particulates, paraffin or asphaltenes. The methods further include obtaining a first measurement via the heater and obtaining a second measurement via the temperature sensor. Based on the first measurement and the second measurement, the velocity of the fluid is determined.
Claims18
A method, comprising:
- disposing a sensor in a fluid in a wellbore, the sensor comprising a heater and a temperature sensor, the fluid flowing at a velocity of about zero centimeters per second to about ten centimeters per second, the fluid comprising at least one of particulates, paraffin and asphaltenes;
- obtaining a first temperature measurement via the heater;
- obtaining a second temperature measurement via the temperature sensor;
- and
- based on the first temperature measurement and the second temperature measurement, determining the velocity of the fluid.
A method, comprising:
- disposing a downhole tool in a fluid in a wellbore, the downhole tool including a sensor comprising a heater and a temperature sensor, the fluid flowing at a velocity less than about ten centimeters per second, the fluid comprising one of particulates, paraffin and asphaltenes;
- determining a thermal property selected from a temperature excursion or a normalized power dissipation between the heater and the fluid via the sensor;
- and
- based on the thermal property, determining the velocity of the fluid.
A method, comprising:
- disposing a downhole tool in a wellbore, the downhole tool including a sensor comprising a heater and a temperature sensor, wherein the sensor is capable of sensing fluid flow having of a velocity of about zero meters per second to about ten meters per second;
- producing fluid comprising at least one of paraffin and asphaltenes from a subterranean formation adjacent the wellbore;
- obtaining a response of the sensor;
- and
- based on the response, determining the velocity of the fluid.
Dependencies are inferred from the claim text.