HR: 1340h
AN: H13F-1643    [Abstracts]
TI: A Pilot-box injection experiment for monitoring the fate and migration of CO2 for geological sequestration
AU: * Wang, S
EM: sookyun@pknu.ac.kr
AF: Pukyong National University, 599-1Daeyeon3-Dong, Nam-Gu, Busan, 608-737, Korea, Republic of
AU: Lee, M
EM: heelee@pknu.ac.kr
AF: Pukyong National University, 599-1Daeyeon3-Dong, Nam-Gu, Busan, 608-737, Korea, Republic of
AU: Park, M
EM: mikyung@pknu.ac.kr
AF: Pukyong National University, 599-1Daeyeon3-Dong, Nam-Gu, Busan, 608-737, Korea, Republic of
AU: Kim, H
EM: hejkim@pknu.ac.kr
AF: Pukyong National University, 599-1Daeyeon3-Dong, Nam-Gu, Busan, 608-737, Korea, Republic of
AU: Kang, H
EM: napl1004@empal.com
AF: Pukyong National University, 599-1Daeyeon3-Dong, Nam-Gu, Busan, 608-737, Korea, Republic of
AB: A three-dimensional CO2 injection experiment was conducted to investigate the capability and applicability of geochemical sampling and electrical resistivity measurements in monitoring the fate and migration of various phase of CO2 for geological sequestration. Two types of CO2 – dissolved and gas phases- and a mineral oil, KF- 20, representing a supercritical CO2 in deep brine aquifers were tested in a series of injection experiments in a pilot-scale box filled with 1-mm diameter glass beads. As well as collecting samples of porewater and gas through 40 sampling ports spatially distributed in the box, time-lapse electrical resistivity measurements were made with 120 electrodes positioned on the front, back and top panels. For reconstructing three-dimensional resistivity images, potential differences were measured at 32 potential dipoles on the top surface of the tank due to two current dipoles on the front and back sides. The resultant resistivity images were compared with the discrete distribution of dissolved CO2 or oil concentrations in each case. It was clearly showed that the three- dimensional resistivity images were successfully able to represent the distribution and migration of CO2 injected in various phases in an artificial aquifer. The experimental results also suggested that the electrical resistivity tomography could be an option for monitoring CO2 injected in deep geological formations for sequestration.
DE: 0910 Data processing
DE: 1832 Groundwater transport
DE: 1848 Monitoring networks
DE: 5109 Magnetic and electrical properties (0925)
SC: Hydrology [H]
MN: 2007 Fall Meeting