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US 11,598,895 B2Granted
Ultrasonic waveform processing using deconvolution in downhole environments
AssigneeHalliburton Energy Services, Inc.
InventorsGlenn Andrew Wilson, Arthur Cheng
Life of this patent
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Abstract
Deconvolution-based processing of ultrasonic waveforms enables robust calculation of two-way travel time for an ultrasonic caliper, particularly in the presence of multiple, proximal reflectors (e.g., mud cake, formation, casing, cement, etc.).
Claims16
A method for processing downhole ultrasonic waveforms, comprising:
- deploying a logging tool along a wellbore wherein the logging tool comprises at least one ultrasonic transducer operating in a pulse-echo mode;
- transmitting a source wavelet from the at least one ultrasonic transducer;
- receiving a second ultrasonic waveform using the at least one ultrasonic transducer;
- processing the source wavelet and second ultrasonic waveforms using a deconvolution technique to generate an impulse response, wherein the deconvolution technique preserves an amplitude of the source wavelet and applies the preserved amplitude to the second ultrasonic waveform to identify a deconvolved amplitude spike of the second ultrasonic waveform, thereby generating the impulse response;
- using the deconvolved amplitude spike to calculate a two-way travel time between the source wavelet and second ultrasonic waveform;
- and
- deriving at least one downhole measurement using at least one of the deconvolved amplitude spike or two-way travel time of the impulse response.
4 more elements
A system for processing downhole ultrasonic waveforms, comprising:
- deploying a logging tool along a wellbore wherein the logging tool comprises at least one ultrasonic transducer operating in a pulse-echo mode;
- and
- processing circuitry communicably coupled to the logging tool to perform an operation comprising:
- transmitting a source wavelet from the at least one ultrasonic transducer;
- receiving a second ultrasonic waveform using the at least one ultrasonic transducer;
- processing the source wavelet and second ultrasonic waveforms via a deconvolution technique to generate an impulse response, wherein the deconvolution technique preserves an amplitude of the source wavelet and applies the preserved amplitude to the second ultrasonic waveform to identify a deconvolved amplitude spike of the second ultrasonic waveform, thereby generating the impulse response;
- using the deconvolved amplitude spike to calculate a two-way travel time between the source wavelet and second ultrasonic waveform;
- and
- deriving at least one downhole measurement using at least one of the deconvolved amplitude spike or two-way travel time of the impulse response.
6 more elements
Dependencies are inferred from the claim text.