Development of the method to remedy leakage from geological CO2 reservoir using CO2 reactive grout

开发利用CO2活性灌浆修复CO2地质储层渗漏的方法

• 批准号: 21360442
• 负责人: ITO Takatoshi
• 金额: $ 9.57万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21360442/
• 关键词: 廃棄物地下保存; 処分; 地球温暖化ガス排出削減; 大深度地下; 環境技術

In order to remedy CO_2 leakage through pre-existing and/or induced fractures from storage reservoirs, we studied a concept to use an aqueous solution. The solution will have a sufficiently-low viscosity for passing through even small aperture, and it will not impact formation permeability as long as the solution is left as it is. When the solution encounters dissolved CO_2, precipitation will occur due to chemical reaction. As a result, the permeability will be reduced by filling the pores and fractures in the rocks with the precipitates. We demonstrated first this idea through laboratory experiments simulating subsurface condition at 1000 m deep, i. e. 10 MPa and 40 deg. C. The results show that the present method led to a 99 %permeability reduction in a glass-bead artificial rock even its initially-high permeability of few darcy. Such reduction of permeability was reproduced successfully by the non-isothermal reactive geochemical transport program TOUGHREACT. Based upon these success, the present method was applied by numerical modeling to a 2-D caprock-aquifer system under field physical and chemical conditions. The results show that the precipitates were produced and they filled up pores around outlet of the leakage path so sufficiently that the CO_2 migration was blocked, and the condition was confirmed stable over a long time.

为了补救储层中预先存在的和/或诱发裂缝造成的CO_2 泄漏，我们研究了使用水溶液的概念。该溶液将具有足够低的粘度，即使是很小的孔径也能通过，并且只要溶液保持原样，就不会影响地层渗透率。当溶液遇到溶解的CO_2时，会因化学反应而产生沉淀。结果，沉积物填充岩石中的孔隙和裂缝，从而降低渗透性。我们首先通过模拟 1000 米深的地下条件的实验室实验证明了这个想法。 e. 10 兆帕和 40 度。 C. 结果表明，本方法使玻璃珠人造岩石的渗透率降低了 99%，即使其最初的渗透率高达几个达西。非等温反应地球化学输运程序 TOUGHREACT 成功地再现了这种渗透率的降低。基于这些成功，本方法通过数值模拟应用于现场物理和化学条件下的二维盖层-含水层系统。结果表明,沉淀物产生并充分填充了泄漏路径出口周围的孔隙,从而阻止了CO_2的迁移,并且证实了该条件可以长期稳定。

项目成果

CO2地中貯留層からの原位置反応法による漏洩修復と数値シミュレーションによる検討

CO2 地下水库泄漏原位反应修复及数值模拟研究

• 发表时间: 2010
• 作者: 田中秀宜;伊藤高敏;関根孝太郎;Xu;T.
• 通讯作者: T.

CO2地中貯留層からの漏洩修復法の検討

CO2地下水库渗漏修复方法探讨

• 发表时间: 2009
• 作者: 田中秀宜;櫻井雅徳;関根孝太郎;伊藤高敏
• 通讯作者: 伊藤高敏

Proposed Concept of In-situ Reaction Barrier to Remedy Leakage from Reservoirs of Geological CO2 Storage(招待講演)

提出原位反应屏障修复CO2地质封存储层泄漏的概念（特邀报告）

• 发表时间: 2010
• 作者: H. Asanuma;Y. Mukuhira;H. Niitsuma;M. Haring;伊藤高敏
• 通讯作者: 伊藤高敏

Proposed Concept of In-situReaction Barrier to Remedy Leakagefrom Reservoirs of Geological CO2Storage

提出原位反应屏障修复地质CO2储存库泄漏的概念

• 发表时间: 2010
• 作者: 濱由邦裕;北村充;他;T. Ito
• 通讯作者: T. Ito

CO2貯留層からの漏洩修復法とそのケーススタディー

CO2储库泄漏修复方法及实例

• 发表时间: 2011
• 作者: 谷内雄紀;田中秀宜;伊藤高敏;Xu;T.
• 通讯作者: T.