2017 Fiscal Year Final Research Report
Study on the trapping mechanisms in CO2 geo-sequestration based on pore scale imaging
| Project/Area Number |
25281036
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Partial Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Environmental engineering and reduction of environmental burden
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2017-03-31
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| Keywords | 二酸化炭素 / 地下貯留 / トラップメカニズム / 溶解 / 対流 / 物質輸送 / 空隙スケール |
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| Outline of Final Research Achievements |
One of the major concern of carbon dioxide capture and storage is potential risk of leakage due to buoyancy. In this study, we investigated the trapping mechanisms of CO2 based on microtomography. A physical model of initial gas saturation accompanied with the competition among the interfacial tension, viscous shear force, and buoyancy was proposed, because residual gas saturation depends strongly on the initial saturation. The onset time of the natural convection, which governs the shift to dissolution trapping, is strongly impacted by dispersion, which is apparent diffusion due to complex structure of porous media. Mass transport process from the trapped phase to mobile phase was investigated with the direct numerical simulations for pore scale images.
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| Free Research Field |
複合新領域
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