Open Access

ARTICLE

A Study of Relation Between Permeabilities and Pore Space Based on Dilation Operation

Li Daolun¹, Lu Detang¹, Liu Cong¹

1 Department of Modern Mechanics, Key Laboratory of Software in Computing and Communication of Anhui Province, University of Science and Technology of China, Hefei 230027, China.

Structural Longevity 2013, 10(2), 71-84. https://doi.org/10.3970/sl.2013.010.071

Abstract

CO2 or acidic material injection into oil reservoirs or Alkaline-surfactantpolymer (ASP) flooding induces reactivity between CO2, acid, ASP, pore-waters and minerals, which results in modification of porosities and permeabilities. We use dilation operation to simulate the modification of the porosities and study the variation of permeabilities. Firstly we get digital images from CT experiment of a real rock core. Secondly the pore space of digital cores is expanded by dilation operation which is one of basic mathematical morphologies. Thirdly, the distribution of pore bodies and pore throats are obtained from the pore network modeling extracted by maximal ball method. Finally, the relation between network modeling parameters and permeabilities is analyzed.
The result is that the throat change influences the permeability exponentially and that permeabilities are significantly influenced by the big throats.

---

Keywords

---