-
Natural sciences
- Geology
Traditional pore classification systems in geomaterials rely on subjective 2D descriptions of 3D pore structures. Recent developments in CT and image analysis research allow characterisation of complex pore-networks in 3D from sub-micron to centimetre scale, as encountered in carbonate rocks. The possibility to quantify this 3D porosity urges for the formulation of a new pore classification system, based on the 3D characteristics of pores and calibrated by using standard and more advanced petrophysical analyses. This should finally also contribute to a better porosity –permeability correlation. Additionally, the aspect of the smallest volume, that can be taken as a representation for the entire sample that does not respond to small changes in volume of location, will be addressed since in CT-technology sample size is related to resolution. An upscaling strategy will be set up in which data on porosity acquired at different resolutions (from micro- to macro porosity) and sample sizes are aligned. This will finally help to understand the major controlling factors on pore development
and permeability.