Air injection tests in two argillaceous rock formations : experimental results and modelling

Research output: Contribution to report/book/conference proceedingsChapter

Authors

  • Xiang Ling Li
  • Enrique Romero
  • Laura González Blanco
  • Xavier Sillen
  • Paul Marschall
  • Cristina Jommi

Institutes & Expert groups

  • UPC - Universitat Politècnica de Catalunya
  • NIRAS/ONDRAF
  • NAGRA - National Cooperative for the Disposal of Radioactive Waste
  • TUD - Delft University of Technology

Documents & links

DOI

Abstract

Air flow through two argillaceous rock formations is investigated on the basis of laboratory work and its modelling to help in the interpretation of the results. Priority in the experimental program has been given to study the volume change response of these initially water saturated materials along relatively fast and controlled volume rate air injections. These high rates intend to give preference to single-phase air flow mechanisms associated with the opening of stress-dependent pathways. Particular attention has been focused on the changes in the pore network to detect opening of fissures after air injection tests using mercury intrusion porosimetry. Selected experimental results have been simulated using a fully coupled hydromechanical finite element code, which incorporates an embedded fracture permeability model to account for the simulation of the gas flow along preferential pathways.

Details

Original languageEnglish
Title of host publicationEnergy Geotechnics
Subtitle of host publicationChapter 97 - Air injection tests in two argillaceous rock formations: Experimental results and modelling
EditorsFrank Wuttke, Sebastian Bauer, Marcelo Sanchez
PublisherTaylor & Francis (CRC)
Pages715-721
Number of pages8
Edition2016
ISBN (Electronic)978-1-315-31523-2
ISBN (Print)978-1-138-03299-6
DOIs
Publication statusPublished - 1 Jun 2016

Keywords

  • gas transport, deep clay formations, coupled hydro-mechanical response, microstructure analysis, opening of discontinuities, preferential air flow

ID: 2144415