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.
|Number of pages||7|
|Publication status||Published - 2017|
|Event||13th International Conference on Greenhouse Gas Control Technologies, GHGT 2016 - Lausanne, Switzerland|
Duration: Nov 14 2016 → Nov 18 2016
All Science Journal Classification (ASJC) codes