Articles | Volume 7, issue 4
Research article
22 Jul 2016
Research article |  | 22 Jul 2016

Porosity and permeability determination of organic-rich Posidonia shales based on 3-D analyses by FIB-SEM microscopy

Georg H. Grathoff, Markus Peltz, Frieder Enzmann, and Stephan Kaufhold

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Cited articles

Bhandari, A. R., Flemings, P. B., Polito, P. J., Cronin, M. B., and Bryant, S. L.: Anisotropy and stress dependence of permeability in the Barnett Shale, Transp. Porous Med,, 2015.
Cardozo, N. and Allmendinger, R. W.: Spherical projections with OSXSteronet, Comput. Geosci., 51, 193–205,, 2013.
Chalmers, G. R., Bustin, R. M., and Power, I. M.: Characterization of gas shale pore systems by porosimetry, porosimetry, surface area and field emission scanning electron microscopy/transmission electron microscopy image analyses: Examples from the Barnett, Woodford, Haynesville, Marcellus and Doig units, APPG Bulletin, 96, 1099–1119,, 2012.
Curtis, M. E., Cardott, B. J., Sondergeld, C. H., and Rai, C. S.: Development of organic porosity in the Woodford Shale with increasing thermal maturity, Int. J. Coal Geol., 103, 26–31,, 2012.
Desbois, G., Urai, J. L., Hemes, S., Schröppel, B., Schwarz, J.-O., Mac, M., and Weiel, D.: Multi-scale analysis of porosity in diagenetically altered reservoir sandstone from the Permian Rotliegend (Germany), J. Petrol. Sci. Eng.,, 2016.
Short summary
This study improves our understanding of the evolution of pores in shales for modelling transport properties. 3-D microscopy on early and postmature Posidonia Shales showed similar porosities and pore size distributions. Large isolated pore clusters are within carbonates and clay minerals. Pores form during maturation in the postmature-matrix-filling organic matter. Modelled permeabilities are lowest perpendicular to bedding. They decrease with increasing maturity and are comparable to experimental data.