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| Home > Publications database > Estimation of sediment texture from spectral induced polarisation data using cluster and principal component analysis |
| Home > Publications database > Estimation of sediment texture from spectral induced polarisation data using cluster and principal component analysis |
| Journal Article | FZJ-2016-06087 |
; ;
2016
EAGE
Houten
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Please use a persistent id in citations: doi:10.3997/1873-0604.2016033
Abstract: Spectral induced polarisation data are usually interpreted with simple models in order to derive petrophysical relationships between electrical and sedimentological properties, such as texture, clay content, and permeability. The aim of this work is to explore the value of spectral induced polarisation in addition to conventional direct-current resistivity measurements for determining textural properties of saturated samples collected from alluvial deposits. For this, an advanced data processing approach that combines cluster and principal component analysis was developed and applied to integral parameters derived from Debye decomposition of spectral induced polarisation data. This data processing procedure allowed identifying groups of samples with a similar spectral induced polarisation response and to derive a characteristic grain-size distribution for each group of samples.The method to estimate the grain-size distribution from spectral induced polarisation data was successfully validated using independent sediment samples. The remaining uncertainty in the estimation of sediment texture from spectral induced polarisation data was attributed to the effect of pore size distribution and mineralogy, which were not considered in the present work but can be added in the future within the same conceptual workflow.
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