Japan Geoscience Union Meeting 2018

Presentation information

[JJ] Oral

H (Human Geosciences) » H-SC Social Earth Sciences & Civil/Urban System Sciences

[H-SC05] CCUS (Carbon Dioxide Capture, Utilization, and Storage) for Climate Mitigation

Wed. May 23, 2018 9:00 AM - 10:30 AM 201B (2F International Conference Hall, Makuhari Messe)

convener:Masao Sorai(Institute for Geo-Resources and Environment, National Institute of Advanced Industrial Science and Technology), Ziqiu Xue(Research Institute of Innovative Tech for the Earth), Masaatsu Aichi(東京大学大学院新領域創成科学研究科), Chairperson:Xue Ziqiu(Research Institute of Innovative Technology for the Earth)

10:00 AM - 10:15 AM

[HSC05-05] Numerical analysis on CO2 storage capacity

*Haruki Nishiyama1, Hiroshi Kinoto1, Takaomi Tobase2, Takahiro Nakajima3, Ziqiu Xue3 (1.JP Business Service Corporation., 2.Electric Power Development Co., Ltd., 3.Research Institute of Innovative Technology for the Earth)

Keywords:Carbon dioxide capture and strage, TOUGH2, Reservoir Simulation

CO2 geological storage is expected as a mitigation measure for climate change. The main subject of the storage evaluation on the underground reservoir are (1) evaluation of CO2 storage capacity, and (2) evaluation of injectivity. In this research, we reported a methodology for the evaluation of storage capacity via numerical analysis geological information is generally limited, the approximate CO2 storage capacity at the site selection stage has been evaluated by "Volumetric Method". If detailed geological information such as inclination of reservoir layer, inhomogeneity of physical properties, geomechanical strength of cap rock etc. were obtained at a CO2 storage site, more accurate storage capacity can be evaluated by numerical analyses.
In this research, we adopted a numerical analysis method to evaluate CO2 storage capacity. After a geological model was built, we carried out simulations of CO2 injection. For the simulation for multicomponent / multiphase fluid, TOUGH2-ECO2N code used. Comparing he "Volumetric Method" with the result of the numerical analysis, the latter was estimated to be about 65% of the former.
From the analogy of oil/gas field, the CO2 storage capacity evaluated by the “Volumetric Method” corresponds to "Resources amount" and that evaluated by numerical analysis would be "Reserves". As a result, the difference between the “Volumetric Method” and the result of numerical analysis seems to be generally reasonable.
In addition to the storage capacity evaluation, numerical analysis can give estimation on the pressure build-up in the reservoir and the distribution of the CO2 plume. Hence, it is expected that the design of the location and number of injection wells, injection rate, injection period installation of pressure mitigation wells etc. could be evaluated from the analysis results.