Transient Electromagnetic Flaw Detection and Casing Wall Thickness Measurements in Multi-String Wells
| Autor: | G. I. Golovatskaya, A. P. Potapov, A. V. Shumilov |
|---|---|
| Jazyk: | English<br />Russian |
| Rok vydání: | 2023 |
| Předmět: | |
| Zdroj: | Vestnik Permskogo Universiteta: Seriâ Geologiâ, Vol 22, Iss 3, Pp 238-242 (2023) |
| Druh dokumentu: | article |
| ISSN: | 1994-3601 2313-4798 |
| DOI: | 10.17072/psu.geol.22.3.238 |
| Popis: | The transient electromagnetic method is the most effective in the studying of multi-string wells. First, the nonstationary field is measured after the current is turned off (without the primary field) that reduces the coil spacing to zero, i.e. combine the generator and receiver coils. This significantly improves the vertical characteristic of the probe, allows the probe to register small defects. Second, the non-stationary mode allows separating signals from the first, second, third, etc. strings much easier than the harmonic mode. It improves the accuracy of thickness estimation and defect detection. The paper proposes an algorithm for interpreting the measurement results. |
| Databáze: | Directory of Open Access Journals |
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