OPTICAL MONITORING OF FLUID FLOW
First Claim
Patent Images
1. A system comprising:
- a fiber optic cable deployed in a wellbore proximate a region of interest;
an optical source to launch an optical pulse into the fiber optic cable;
an optical receiver to receive a backscattered optical signal produced from the fiber optic cable in response to the light pulse; and
a processing system configured to determine a distribution of vibration with respect to location along the fiber optic cable based on the backscattered signal.
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Abstract
A distributed vibration sensor is positioned in a wellbore to measure fluid flow. The output of the sensor is monitored to acquire a distribution of vibration along a region of interest in the wellbore. An indication of the effectiveness of a well treatment to stimulate fluid flow in the wellbore may be provided based on the acquired vibration distribution. In some embodiments, the well treatment may be adjusted based on the indication of effectiveness.
119 Citations
20 Claims
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1. A system comprising:
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a fiber optic cable deployed in a wellbore proximate a region of interest; an optical source to launch an optical pulse into the fiber optic cable; an optical receiver to receive a backscattered optical signal produced from the fiber optic cable in response to the light pulse; and a processing system configured to determine a distribution of vibration with respect to location along the fiber optic cable based on the backscattered signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for monitoring a fluid flow in a wellbore, comprising:
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providing in the wellbore a distributed vibration sensor, wherein the distributed vibration sensor is positioned to sense a distribution of vibration along a section of the well; performing a well treatment involving transporting a material into the well; monitoring output of the distributed vibration sensor for the section of the well; and providing an indication of a level of effectiveness of the well treatment from the output. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method usable in a wellbore, comprising:
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positioning a distributed vibration sensor to measure vibration in a region of interest in a well; acquiring from the distributed vibration sensor a distribution of vibration along the region of interest resulting from a well treatment process; and providing a determination of a level of effectiveness of the well treatment process based on the distribution of vibration. - View Dependent Claims (17, 18, 19, 20)
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Specification