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| Titel |
Multiscale characterization of pore spaces using multifractals analysis of scanning electronic microscopy images of carbonates |
| VerfasserIn |
M. S. Jouini, S. Vega, E. A. Mokhtar |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1023-5809
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| Digitales Dokument |
URL |
| Erschienen |
In: Nonlinear Processes in Geophysics ; 18, no. 6 ; Nr. 18, no. 6 (2011-12-14), S.941-953 |
| Datensatznummer |
250014007
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| Publikation (Nr.) |
 copernicus.org/npg-18-941-2011.pdf |
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| Zusammenfassung |
| Pore spaces heterogeneity in carbonates rocks has long been identified as an
important factor impacting reservoir productivity. In this paper, we study
the heterogeneity of carbonate rocks pore spaces based on the image analysis
of scanning electron microscopy (SEM) data acquired at various
magnifications. Sixty images of twelve carbonate samples from a reservoir in
the Middle East were analyzed. First, pore spaces were extracted from SEM
images using a segmentation technique based on watershed algorithm. Pores
geometries revealed a multifractal behavior at various magnifications from
800x to 12 000x. In addition, the singularity spectrum provided quantitative
values that describe the degree of heterogeneity in the carbonates samples.
Moreover, for the majority of the analyzed samples, we found low variations
(around 5%) in the multifractal dimensions for magnifications between
1700x and 12 000x. Finally, these results demonstrate that multifractal
analysis could be an appropriate tool for characterizing quantitatively the
heterogeneity of carbonate pore spaces geometries. However, our findings
show that magnification has an impact on multifractal dimensions, revealing
the limit of applicability of multifractal descriptions for these natural
structures. |
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