|
| | Abstract | | With CO2 sequestration, it is thought that flow behavior of injected CO2 changes with type of reservoir rock, and temperature pressure condition. In this research, measurement of resistivity change due to injection of supercritical CO2 was conducted to estimate the difference of CO2 flow behavior in different type of rocks, by using Berea and Tako sandstones. By setting the impression electrode on the both end and the measurement electrode of ring condition on the side of the rock sample, migration of CO2 was detected. From the result, with the Berea sandstone CO2 permeated equally, and the average of replacement ratio of the brine became approximately 50%. With the Tako sandstone, the permeation of CO2 was not equal and replacement ratio became approximately 50% on injection side, and 33% on outflow side. From the comparison of bedding plane of the sample and resistivity change, it is thought that replacement ratio of Tako sandstone changed on injection side and outflow side because of the influence of bedding plane distribution. The permeation of CO2 was controlled by the bedding plane and becomes uneven. From the result of this experiment, possibility of monitoring the difference of the flow behavior with resistivity measurement was shown. |
|
|
|
| |
|