Casing thickness measurement using acoustic wave correlation
AssigneeHalliburton Energy Services, Inc.
InventorsTianrun Chen, Yibing Zheng, Tatiana Gilstrap, Arthur Chuen Hon Cheng, Robert Eric Epstein
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Abstract
Systems, methods, and software for determining a thickness of a well casing are described. In some aspects, the thickness of the well casing is determined based on results of comparing a measured waveform and model waveforms. The measured waveform and model waveforms are generated based on operating an acoustic transmitter and an acoustic receiver within a wellbore comprising the well casing.
Claims21
A method comprising:
- disposing a tool in a wellbore;
- directing an acoustic signal towards a well casing in the wellbore, the acoustic signal generated by an acoustic transmitter of the tool;
- accessing a measured waveform associated with an acoustic signal returned via the well casing based on operating an acoustic receiver of the tool within the wellbore comprising the well casing;
- comparing the measured waveform to a plurality of model waveforms, wherein each of the plurality of model waveforms corresponds to a different thickness of the well casing;
- determining, by operation of data processing apparatus, a thickness of the well casing based on results of comparing the measured waveform and the plurality of model waveforms;
- and
- assessing damage to the well casing based on the determined thickness of the well casing.
A non-transitory computer-readable medium encoded with instructions that, when executed by data processing apparatus, cause the data processing apparatus to perform operations comprising:
- accessing a measured waveform associated with an acoustic signal returned via a well casing based on operating an acoustic transmitter and an acoustic receiver of a tool disposed within a wellbore comprising the well casing, the acoustic transmitter generating an acoustic signal directed towards the well casing;
- comparing the measured waveform to a plurality of model waveforms, wherein each of the plurality of model waveforms corresponds to a different thickness of the well casing;
- determining a thickness of the well casing based on results of comparing the measured waveform and the plurality of model waveforms;
- and
- assessing damage to the well casing based on the determined thickness of the well casing.
A system comprising:
- an acoustic transmitter-receiver pair of a tool to be disposed within a wellbore comprising a well casing, the acoustic transmitter generating an acoustic signal and transmitting the acoustic signal towards the well casing;
- and
- a computing system coupled with the acoustic transmitter-receiver pair, the computing system is configured to:
- access a measured waveform associated with an acoustic signal returned via the well casing based on operating the acoustic receiver of the tool within an interior portion of the well casing;
- compare the measured waveform to a plurality of model waveforms, wherein each of the plurality of model waveforms corresponds to a different thickness of the well casing;
- determine a thickness of the well casing based on results of comparing the measured waveform and the plurality of model waveforms;
- and
- assessing damage to the well casing based on the determined thickness of the well casing.
Dependencies are inferred from the claim text.