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| Titel |
A new method for investigating heterogeneities from well logs using the Hilbert-Huang transform |
| VerfasserIn |
Said Gaci, Naima Zaourar, Olga Hachay |
| Konferenz |
EGU General Assembly 2015
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250103568
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| Publikation (Nr.) |
 EGU/EGU2015-15076.pdf |
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| Zusammenfassung |
| Borehole logs exhibit multi-scale properties that cannot be analyzed using the conventional tools. Here, we propose a new method based on Hilbert-Huang transform (HHT), a combination of the empirical mode decomposition (EMD) and Hilbert transform (HT), for estimating a local scaling coefficient from well logs. This parameter measures heterogeneities degree of the layers crossed by the borehole.
The proposed technique has been applied on P- and S-wave seismic velocity logs recorded at the KTB main borehole drilled for the German Continental Deep Drilling program. The calculated depth-dependent scaling parameter highlighted the lithological discontinuities occurred within the logged depth interval, and allowed to measure the complexity of underground heterogeneities.
To conclude, the suggested method presents a new way to explore multi-scale features of the logs data, and may bring additional information to the conventional analysis tools. More datasets are needed to establish a possible relationship between the local scaling parameter and lithology. |
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