Full text loading...
-
Evolution in Physical Properties of Quartz-bearing Rocks with Evolving Degree of Microfissuration
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 80th EAGE Conference and Exhibition 2018, Jun 2018, Volume 2018, p.1 - 5
Abstract
Rocks are complex media that may contain very different geometries of pores. The two extreme families are the spherical pores, making up most of the total porosity, and the thin elongated micro cracks, controlling most of the rock elastic response. While the two families may exist in crustal rocks, they were found to be present in most sandstones. Using a technique to induce a set amount of micro cracks (thermal cracking) in a target rock, the purpose of this work is to investigate the relative effects of the porosity populations on the elastic and transport properties. We will show that, while elastic properties are similarly affected for all studied rocks, a strong effect of the rock initial porosity is observed on the resulting transport property. Moreover, consistently with existing theories, transport properties are additionally affected by the opening of micro cracks, which depends on the temperature of treatment.