Use of fiber optics in deviated flows
First Claim
1. A method for determining the cross-sectional distribution of fluids along a deviated wellbore, comprising:
- measuring a temperature profile along at least two levels of a vertical axis of a deviated section of a wellbore using at least one fiber optic line;
deploying a heating element along the at least one fiber optic line;
identifying the orientation of the at least one fiber optic line by activating the heating element; and
comparing the temperature profiles to determine whether different fluids are present in each of the levels.
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Accused Products
Abstract
A system to determine the mixture of fluids in the deviated section of a wellbore comprising at least one distributed temperature sensor adapted to measure the temperature profile along at least two levels of a vertical axis of the deviated section. Each distributed temperature sensor can be a fiber optic line functionally connected to a light source that may utilize optical time domain reflectometry to measure the temperature profile along the length of the fiber line. The temperature profiles at different positions along the vertical axis of the deviated wellbore enables the determination of the cross-sectional distribution of fluids flowing along the deviated section. Together with the fluid velocity of each of the fluids flowing along the deviated section, the cross-sectional fluid distribution enables the calculation of the flow rates of each of the fluids. The system may also be used in conjunction with a pipeline, such as a subsea pipeline, to determine the flow rates of fluids flowing therethrough.
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Citations
40 Claims
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1. A method for determining the cross-sectional distribution of fluids along a deviated wellbore, comprising:
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measuring a temperature profile along at least two levels of a vertical axis of a deviated section of a wellbore using at least one fiber optic line; deploying a heating element along the at least one fiber optic line; identifying the orientation of the at least one fiber optic line by activating the heating element; and comparing the temperature profiles to determine whether different fluids are present in each of the levels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A system for determining the cross-sectional distribution of fluids along a deviated wellbore, comprising:
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at least one fiber optic line adapted to measure a temperature profile along at least two levels of a vertical axis of a deviated section of a wellbore; and a heating element adapted to be deployed into the deviated section wherein the activation of the heating element enables the identification of the orientation of the at least one fiber optic line. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A system for determining the cross-sectional distribution of fluids along a deviated wellbore, comprising:
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at least one fiber optic line adapted to measure a temperature profile along at least two levels of a vertical axis of a deviated section of a wellbore; at least one conduit housing the at least one fiber optic line, the at least one conduit attached to a conveyance device used for deployment into the wellbore; a plurality of additional fiber optic lines intermediate the top area and the bottom area and adapted to measure a temperature profile, each of the additional fiber optic lines being housed in at least one conduit attached to the conveyance device.
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35. A method for identifying the azimuthal location of a thermal event in a subterranean wellbore, comprising:
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measuring a temperature profile along a portion of a wellbore using at least one fiber optic line; establishing the azimuthal location of the at least one fiber optic line by deploying a heating element along the at least one fiber optic line and activating the heating element; and determining an azimuthal location of a thermal event by analyzing the temperature profile. - View Dependent Claims (36, 37, 38, 39, 40)
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Specification