FLOW VELOCITY AND ACOUSTIC VELOCITY MEASUREMENT WITH DISTRIBUTED ACOUSTIC SENSING
First Claim
1. A well flow velocity measurement method, comprising:
- transmitting an acoustic signal through at least one fluid composition in a well;
detecting velocities of the acoustic signal in both opposite directions along an optical waveguide in the well, the optical waveguide being included in a distributed acoustic sensing system; and
determining an acoustic velocity in the fluid composition based on the velocities of the acoustic signal.
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Abstract
A well flow velocity measurement method can include transmitting an acoustic signal through at least one fluid composition in a well, detecting velocities of the acoustic signal in both opposite directions along an optical waveguide in the well, the optical waveguide being included in a distributed acoustic sensing system, and determining an acoustic velocity in the fluid composition based on the velocities of the acoustic signal. Another well flow velocity measurement method can include propagating at least one pressure pulse through at least one fluid composition in a well, detecting a velocity of the pressure pulse along an optical waveguide in the well, the optical waveguide being included in a distributed acoustic sensing system, and determining an acoustic velocity in the fluid composition based on the velocity of the pressure pulse.
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Citations
31 Claims
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1. A well flow velocity measurement method, comprising:
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transmitting an acoustic signal through at least one fluid composition in a well; detecting velocities of the acoustic signal in both opposite directions along an optical waveguide in the well, the optical waveguide being included in a distributed acoustic sensing system; and determining an acoustic velocity in the fluid composition based on the velocities of the acoustic signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A well flow velocity measurement system, comprising:
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a pressure pulse generator which propagates at least one pressure pulse through at least one fluid composition in a well; and a distributed acoustic sensing system which detects coherent Rayleigh backscattering along an optical waveguide in the well, whereby a velocity of the pressure pulse in the well is determined. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A well flow velocity measurement method, comprising:
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propagating at least one pressure pulse through at least one fluid composition in a well; detecting a velocity of the pressure pulse along an optical waveguide in the well, the optical waveguide being included in a distributed acoustic sensing system; and determining an acoustic velocity in the fluid composition based on the velocity of the pressure pulse. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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Specification