CO2 geological sequestration Nagaoka Project


Classification of Aquifer Storage

In the present project, aquifer storage is classified into two categories. R&D is being promoted with a focus on individual categories and a correlation between them.

Classification of aquifer storage
Division Category A Category B
Storage method Storage in an anticlinal structure Storage in a geological structure with a stratigraphic trapping, etc.
R&D objective
(- FY2007)
To technologically verify that CO2 can be stored safely in Japan's Category A aquifers for the long term. To elucidate the problems related to Category B aquifers in order to expand storage site options and to improve the economic efficiency of geological storage.
Special note Long-term behavior of CO2 is predicted using a simulator which is newly developed from the geological model of the Iwanohara site. It is necessary to clarify the trap mechanism and construct a storage model based on the basic demonstration test.

Typical Category A aquifer

Typical Category B aquifer

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Demonstration Test and Monitoring at the Iwanohara Test Site

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