Detecting operational anomalies for continuous hydraulic fracturing monitoring
AssigneeSeismos, Inc.
InventorsYouli Quan, Daniel Moos, Jerry M. Harris
Life of this patent
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Abstract
A method for detecting operating anomalies during hydraulic fracturing includes inducing tube waves in a well during pumping a hydraulic fracture treatment. At least one of pressure and time derivative of pressure in the well is measured. The measured at least one of pressure and time derivative of pressure is transformed into the cepstrum domain. An operational anomaly is detected by determining a change in cepstral quefrency corresponding to a two-way travel time of the tube waves and resonances in the well.
Claims26
A method for detecting operating anomalies during hydraulic fracturing, comprising:
- inducing tube waves in a well during pumping a hydraulic fracture treatment;
- measuring at least one of pressure and time derivative of pressure in the well;
- transforming the measured at least one of pressure and time derivative of pressure into the cepstrum domain;
- and
- detecting an operational anomaly by determining a change in cepstral quefrency corresponding to a two-way travel time of the tube waves in the well.
A non-transitory computer readable medium comprising logic operable to cause a computer to perform actions comprising:
- accepting as input to the computer, signals resulting from inducing tube waves in a well during pumping a hydraulic fracture treatment and measuring at least one of pressure and time derivative of pressure in the well;
- transforming the measurements of at least one of pressure and time derivative of pressure into the cepstrum domain;
- and
- detecting an operational anomaly by determining a change in cepstral quefrency corresponding to a two-way travel time of the tube waves in the well.
Dependencies are inferred from the claim text.