Evolution of Permeability during Fracturing Processes in Rocks under Conditions of Geological Storage of CO₂

• Fujii Takashi

  Institute for Geo-Resources and Environment, National Institute of Advanced Industrial Science and Technology (AIST)

• Funatsu Takahiro

  Western Australian School of Mines, Curtin University

• Oikawa Yasuki

  Institute for Geo-Resources and Environment, National Institute of Advanced Industrial Science and Technology (AIST)

• Sorai Masao

  Institute for Geo-Resources and Environment, National Institute of Advanced Industrial Science and Technology (AIST)

• Lei Xinglin

  Institute for Geo-Resources and Environment, National Institute of Advanced Industrial Science and Technology (AIST)

書誌事項

タイトル別名

• Evolution of Permeability during Fracturing Processes in Rocks under Conditions of Geological Storage of CO₂

抄録

We investigated experimentally the change in permeability in three different types of soft rocks including mudstone, sandstone, and tuff from the Fureoi and Takinoue formations, which are representative of the CCS demonstration site at Tomakomai in Japan, and another type of mudstone from the Besho Fm. (B-M). Permeability during deformation, shear fracturing, and post-failure slipping is estimated from measured flow rate and differential pore pressure. In addition, the morphologies of the shear fracture zones were examined using the X-ray CT scanning technique. All the samples exhibit typical brittle-fracturing behaviors, except for the B-M sample which does not show a major shear fracture. During the fracturing process, the permeability increased by one to three orders of magnitude. Further changes in the post-failure slipping and stress relaxation regimes show strong dependence on the type of rocks. Observed changes in permeability can be interpreted as results of fracturing creation, shear zone smoothing, closure and reactivation of fractures under different stress regimes.

収録刊行物

• MATERIALS TRANSACTIONS

  MATERIALS TRANSACTIONS 56 (5), 679-686, 2015

  公益社団法人 日本金属学会

キーワード

• permeability evolution
• fracturing processes
• mudstone
• sandstone
• tuff
• CO₂ geological storage

詳細情報

• CRID: 1390282679230611584
• NII論文ID: 130005065989
• NII書誌ID: AA1151294X
• DOI: 10.2320/matertrans.m-m2015802
• ISSN: 13475320
• ISSN: 13459678
• NDL書誌ID: 026355497
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I026355497
• Web Site: https://www.jstage.jst.go.jp/article/matertrans/56/5/56_M-M2015802/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
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