Case study: trapping mechanisms at the pilot-scale CO2 injection site, Nagaoka, Japan

Ziqiu Xue, Saeko Mito, Keigo Kitamura, Toshifumi Matsuoka

Research output: Contribution to journalConference articlepeer-review

22 Citations (Scopus)


In this paper, we present the results of geophysical and geochemical observations at the Nagaoka site, where the first Japanese project on CO2 geological storage is currently underway. We collected formation water and rock samples from the reservoir, and conducted laboratory experiments to investigate the seismic wave response and geochemical reactions due to the CO2 injection under simulated in situ conditions. The results of time-lapse crosswell seismic tomography indicate an area of P-wave velocity decrease due to CO2 saturation, and the CO2-bearing zone near the injection well expanded clearly along the formation up dip direction during CO2 injection. The presence of CO2 was also identified by induction, sonic and neutron logging at the observation wells. The results of geochemical reactions demonstrated the potential of reservoir sandstones at the Nagaoka site for the effective solubility, ionic, and mineral trapping of CO2.

Original languageEnglish
Pages (from-to)2057-2062
Number of pages6
JournalEnergy Procedia
Issue number1
Publication statusPublished - Feb 2009
Externally publishedYes
Event9th International Conference on Greenhouse Gas Control Technologies, GHGT-9 - Washington DC, United States
Duration: Nov 16 2008Nov 20 2008

All Science Journal Classification (ASJC) codes

  • Energy(all)


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