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Laboratory experiments on ultrasonic logging through casing for barrier integrity validation

Laboratory experiments on ultrasonic logging through casing for barrier integrity validation

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Sammendrag
Verification of annular barriers is essential for well integrity, with ultrasonic methods being central in well integrity testing for many decades. By doing ultrasonic pitch-catch measurements on a bench top laboratory setup developed to replicate an oil well casing, we were able to show that the beam width,-6dB, of the leaky Lamb wave propagating in the pipe widens only from 14 to 20.4 mm after 140mm of propagation in the pipe. This indicates that the excited Lamb wave has beam-like features, with litle spreading perpendicular to the propagation direction, hence, can be used to evaluate a limited area of the pipe. When introducing two pipes in the experimental setup, as an extension of a previously conducted simulation study by Viggen et al. [1], we could observe multiple Lamb wave packets being excited in the pipes. By adjusting the setup to replicate casing eccentricity, the effects of this could be observed in the measurements
Oppdragsgiver
  • Norges forskningsråd / 237887
Språk
Engelsk
Forfatter(e)
Institusjon(er)
  • Norges teknisk-naturvitenskapelige universitet
  • Norges teknisk-naturvitenskapelige universitet
  • SINTEF Digital / Connectivity Technologies and Platforms
  • SINTEF Industri / Petroleum
År
2017
Publisert i
International Conference on Offshore Mechanics and Arctic Engineering (OMAE) [proceedings]
ISSN
1523-651X
Forlag
ASME Press
Bok
ASME 2017 36th International Conference on Ocean, Offshore and Arctic Engineering - Volume 8: Polar and Arctic Sciences and Technology; Petroleum Technology, Trondheim, Norway, June 25–30, 2017
Hefte nr.
8
ISBN
978-0-7918-5776-2