Numerical estimation of carbonate properties using a digital rock physics workflow
Fecha
2014-01-01
Autores
Osorno, M.
Uribe, D.
Saenger, E.H.
Madonna, C.
Steeb, H.
Ruiz, O.
Título de la revista
ISSN de la revista
Título del volumen
Editor
EAGE Publishing BV
Resumen
Digital rock physics combines modern imaging with advanced numerical simulations to analyze the physical properties of rocks. In this paper we suggest a special segmentation procedure which is applied to a carbonate rock from Switzerland. Starting point is a CT-scan of a specimen of Hauptmuschelkalk. The first step applied to the raw image data is a non-local mean filter. We then apply different thresholds to identify pores and solid phases. Because we are aware of a non-neglectable amount of unresolved microporosity we also define intermediate phases. Based on this segmentation determine porosity-dependent values for the p-wave velocity and for the permeability. The porosity measured in the laboratory is then used to compare our numerical data with experimental data. We observe a good agreement. Future work includes an analytic validation to the numerical results of the p-wave velocity upper bound, employing different filters for the image segmentation and using data with higher resolution.