Measurement of Electrical Impedance and P-wave Velocity of a Low Permeable Sandstone Core during the Displacement of Saturated Brine by CO2 Injection

Hiroyuki Honda, Keigo Kitamura, Shinnosuke Takaki, Hiro Ikemi, Yasuhiro Mitani

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

Evaluating and monitoring the CO2 behavior in the reservoir, understanding the mechanism of CO2 flow and distribution in the water-CO2 mixture state is essential. In this study, measurement of the complex electrical impedance (Z) and P-wave velocity (Vp) is conducted during the CO2 injection into the rock core under the reservoir condition. Specimen is low permeable sandstone and injection rate is ultra-low (in the low capillarity number (Cn) area) to high. In addition to measuring Z and Vp, differential pressure on the both sides of the specimen and CO2 saturation (SCO2) of the entire specimen are measured. The change of Z and Vp are observed according to the change of differential pressure and SCO2. After the injection test, SCO2 in cross-section of the specimen is estimated using Archie's law and Gassmann's equation (Patchy saturation model) to the experimental results.

Original languageEnglish
Pages (from-to)4879-4885
Number of pages7
JournalEnergy Procedia
Volume114
DOIs
Publication statusPublished - Jan 1 2017
Event13th International Conference on Greenhouse Gas Control Technologies, GHGT 2016 - Lausanne, Switzerland
Duration: Nov 14 2016Nov 18 2016

All Science Journal Classification (ASJC) codes

  • Energy(all)

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