Visualization of Leaky Ultrasonic Lamb Wave Experiments in Multilayer Structures

Klieber, Christoph; Brill, Thilo M.; Catheline, Sebastien; Vincensini, Y.; Mege, F.

doi:10.1016/j.phpro.2015.08.162

Cited by 7 publications

(3 citation statements)

References 3 publications

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“…Zeroug and Froelich (2003) and Viggen et al (2016). The pitch-catch technique has the advantage of the payload signal typically being strong, distinct, and not obscured by another signal; see also Klieber et al (2015). In contrast, the pulseecho technique gives a TIE signal that is relatively weak and must be separated from the FIE signal.…”

Section: Discussionmentioning

confidence: 99%

“…It also compares the difference in TIE arrival times to the predictions of Equation 5 for the eccentered cases and the centered case. Zeroug and Froelich (2003), Klieber et al (2015), and Viggen et al (2016) that there is typically not a significant overlap between the components corresponding to interaction with the inner casing and those corresponding to interaction with the third interface and beyond. This is in contrast to the pulse-echo technique studied here, where the strong FIE and the weaker TIE components overlap, making them more difficult to separate.…”

Section: Methodsmentioning

confidence: 99%

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Analysis of outer-casing echoes in simulations of ultrasonic pulse-echo through-tubing logging

2016

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Cased petroleum wells must be logged to determine the bonding and hydraulic isolation properties of the cement. Ultrasonic logging of single casings has been widely studied and is commercially available. However, ultrasonic logging in multiple-casing geometries is an unexplored topic despite its importance in plug and abandonment operations. Therefore, current logging technologies should be studied in order to evaluate whether they show potential for multiple-casing logging. In this study we used two finite element models of pulse-echo logging. The first model represents logging in the transverse cross-section of a double-casing well. The second model is a copy of the first, but with the outer casing and formation removed, so that the pulse-echo transducer receives only a resonant first interface echo (FIE) from the inner casing. By subtracting the received signals of the second model from those of the first, we can recover the third interface echo (TIE) signal representing the resonant reflection from the outer casing. This signal is used to study what information can in principle be drawn from TIEs in double-casing geometries, with the caveat that TIEs can only approximately be recovered in practical cases. We simulated variations of the material in the annulus beyond the outer casing, of the thickness of the outer casing, and of the eccentering of the outer casing. We found that the first two of these variations have only weak effects on the TIE, but that the eccentering of the outer casing can in principle be found using the TIE arrival time. INTRODUCTIONAs the production life of more and more oil fields are coming to an end, plug and abandonment (P&A) operations are gaining more attention from the industry and regulators. In these operations, the well must be hydraulically sealed in order to permanently avoid leakage. With the increase in the number of P&A operations in the near future, the associated time and cost expenditures are set to increase dramatically. It is therefore very important to look into more efficient P&A methods that still safely ensure permanent sealing.To avoid the time-consuming and expensive job of removing casings

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Analysis of outer-casing echoes in simulations of ultrasonic pulse-echo through-tubing logging

2016

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“…One aim with the laboratory is to develop technology to evaluate cement bonding on the interface outside of the second pipe -a capability that is important for cost-effective plug and abandonment of oil wells. While complete realisations of this capability have not yet been shown, the literature covers various experimental studies [5,20,21], limited theoretical methods [22][23][24][25], and a practical heuristic method giving estimates via machine learning [26]. The laboratory also allows measuring the sound field outside of the concentric pipes.…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Well Integrity Logging Using Phased Array Technology

Johansen,

Buschmann,

Røsberg

et al. 2023

Volume 9: Offshore Geotechnics; Petroleum Technology

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Ultrasonic well integrity logging is an important and common procedure for well completion and plug-and-abandonment operations. Typical logging tools employ single-element ultrasound transducers. In medical ultrasound imaging, however, more flexible phased arrays are the standard. This paper presents a first set of experimental results obtained with up to two linear 32-element phased arrays that are specifically designed for plug-and-abandonment operations in terms of their centre frequency. The experiments encompass pulse-echo and pitch-catch studies for different incidence angles and aperture sizes on plates and pipes with wall thickness as encountered in the offshore industry. The pulse-echo experiment is backed up by simulations, and shows that effect of the incidence angle on the pipe resonance’s frequency and strength is weak and more strong, respectively, and that the effect depends on the frequency response and directivity of the transducer. The pitch-catch experiment demonstrates the importance of carefully choosing the right angle of incidence to excite the intended wave modes.

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Reflection and mode-conversion of ultrasonic leaky Lamb waves at inaccessible discontinuities in layered structures

Brill

Klieber

2016

2016 IEEE International Ultrasonics Symposium (IUS)

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Visualization of Leaky Ultrasonic Lamb Wave Experiments in Multilayer Structures

Cited by 7 publications

References 3 publications

Analysis of outer-casing echoes in simulations of ultrasonic pulse-echo through-tubing logging

Analysis of outer-casing echoes in simulations of ultrasonic pulse-echo through-tubing logging

Ultrasonic Well Integrity Logging Using Phased Array Technology

Reflection and mode-conversion of ultrasonic leaky Lamb waves at inaccessible discontinuities in layered structures

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