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US 10,310,127 B2Granted
System and method of detecting well integrity failure
AssigneeChevron U.S.A. Inc.
InventorsGary Michael Hoversten, Thomas M. Daley, Valeri A. Korneev
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Abstract
Embodiments of a method for detecting well integrity failure are disclosed herein. In general, embodiments of the method utilize seismic signals for detection. In particular, embodiments of the method may use recording of passive or active seismic signals. Further details and advantages of various embodiments of the method are described in more detail in the application.
Claims8
A system for non-invasively detecting a change in well integrity, the system comprising:
- a seismic sensor disposed proximate to a wellhead of a wellbore, the seismic sensor configured to record a plurality of measured seismic signals from the wellbore, the plurality of measured seismic signals including acoustic measurements of the well;
- and
- a computer system coupled to the seismic sensor and configured to detect a change in well integrity as determined from the plurality of seismic signals, wherein the computer system is configured to:
- receive the measured seismic signals including the acoustic measurements of the well;
- compare the acoustic measurements of the well to known acoustic measurements from an undamaged well including a bottom well reflection signal;
- and
- based on at least one of (a) noise in the acoustic measurements at least partially obscuring the bottom well reflection signal, or (b) increased low frequency ambient noise in the acoustic measurements, identifying a change in well integrity.
4 more elements
Dependencies are inferred from the claim text.