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Fractal Scaling Porosity: An Intriguing Approach
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, First EAGE Rock Physics Workshop in Latin America, Dec 2021, Volume 2021, p.1 - 5
Abstract
The study of the scaling of rock porosity has a great importance as (1) porosity is key in reservoir characterization of hydrocarbons, geothermal resources, and aquifers; (2) porosity measurements are usually made at scales that are different to the one(s) of interest; and (3) scaling porosity in heterogeneous media is still not fully understood. Pore space fractal geometry can be analyzed using different lab techniques and/or processing digital images. Specifically, the fractal scaling porosity seems to be one of the ways to go in this topic. The present work proposes a systematic methodology to study scaling porosity in 3D digital images, acquired with X-rays microtomography. It also applies and compares the fractal scaling porosity at three different scales in an andesite sample. We found that the scaling porosity estimates relatively well the image porosity when using the mean pore size in each image. Whereas the porosity estimation of the physical rock sample seems to be better when using the maximum pore size in each image. Consequently, the results indicate that the scaling porosity has the potential to be used for both, calculating the image porosity and the porosity of the actual rocks, if the right pore size is used.