Exploring fissure opening and their connectivity in a Cenozoic clay during gas injection

Conference paper (2017)

Authors

Laura Gonzalez-Blanco Universitat Politecnica de Catalunya

Enrique Romero Universitat Politecnica de Catalunya

C. Jommi

Xavier Sillen Belgian Agency for Radioactive Waste and Enriched Fissile Materials

Xiangling Li EIG Euridice

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Published Date

2017

Language

English

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Abstract

Gas transport properties in argillaceous rocks are becoming an important issue within different contexts of energy-related geomechanics (disposal of radioactive waste, production of shale gas, CO₂ sequestration). The present investigation aims at describing the pathways generated on a deep Cenozoic clay during gas injection using different microstructural techniques. Mercury intrusion porosimetry results have allowed detecting fissures after gas injection tests that have not been observed on intact samples. The opening of these pressure-dependent fissures plays a major role on gas permeability. A complementary insight into the connectivity of these fissures has been quantified by micro-computed tomography.

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