Measuring electric resistivity of rock specimens injected with gas, liquid and supercritical CO2

Kyosuke Onishi, Yoshihiko Ishikawa, Yasuhiro Yamada, Toshifumi Matsuoka

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

CO2 sequestration in a deep aquifer is considered one of the most effective method to solve Global warming. We must understand the behavior of injected CO2 to confirm long-term stability and economic efficiency of CO2 sequestration. We tried to monitor the behavior of gas, liquid and supercritical CO2 injected into water-saturated sandstone by measuring the resistivity of rock specimens. CO2 of gas, liquid, and supercritical phases was flushed through the sandstone specimens at three different flow rates. We could monitor the time-lapse behavior of CO2 in water-saturated sandstones. Also, we tried to convert the resistivity data to the CO2 saturation using Archie's equation. The saturations estimated from resistivity becomes nearly equal to the values calculated from actual outflow volumes. This result indicates the high reliability of electric exploration to monitor CO2 saturation.

Original languageEnglish
Pages (from-to)1480-1484
Number of pages5
JournalSEG Technical Program Expanded Abstracts
Volume25
Issue number1
DOIs
Publication statusPublished - Jan 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Geophysics

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