Study on the universal scaling behavior of residual gas phases using micro-computed tomography

利用微计算机断层扫描研究残余气相的普遍结垢行为

• 批准号: 327231531
• 负责人: Professor Dr. Helmut Geistlinger
• 金额: --
• 依托单位: Institut für Bohrtechnik und Fluidbergbau
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2017
• 资助国家: 德国
• 起止时间: 2016-12-31 至 2021-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/327231531?language=en
• 关键词: Study; universal; scaling; behavior; residual

The capillary trapping of CO2-gas and its subsequent dissolution are two important storage processes of CCS (Carbon Capture Storage) technology, which will be studied in the framework of the applied project.The central objective is an upscaling of pore-scale properties of trapped gas clusters by universal scaling laws predicted by percolation theory. For the first time, an analytical approximation method is used to calculate the effective dissolution rate and tested by comparative macroscale modeling (MIN3P and TOUGH2). Of fundamental interest is the question under which conditions the porous media studied within the project belong to the same universality class, and what is the influence of pore structure, microstructure of the solid surface and heterogeneous wettability on the trapping process.Methodically, the pore structure and the pore space topology will be analyzed and quantified using micro-computed tomography. Based on cluster analysis the geometry and the static distribution of trapped gas clusters will be studied. The dynamics of the trapping behavior will be investigated by optical visualization experiments within glass sphere monolayers. The fluids are selected so that they are proxies for CO2-injection into deep aquifers.The expected results are both of fundamental interest and of great practical relevance, as they improve predictive modeling for CCS-technology and for groundwater remediation (dissolution of residual NAPL (non aqueous phase liquid) or mixed gas phases).

二氧化碳气体的毛细管捕获及其随后的溶解是CCS（碳捕获存储）技术的两个重要存储过程，将在应用项目的框架中研究。中心目标是对被困的孔规范的提升。渗透理论预测的通用缩放定律的气体簇。首次使用分析近似方法来计算有效溶解速率，并通过比较宏观模型（MIN3P和TOUND2）进行测试。基本兴趣是该项目中多孔培养基属于同一普遍性类别的问题，孔结构的影响是什么，固体表面的微观结构和异质性润湿性对诱捕过程的影响。孔结构是孔结构并且将使用微型计算机扫描对孔隙空间拓扑结构进行分析和量化。基于聚类分析，将研究几何形状和静态气体簇的静态分布。捕获行为的动力学将通过玻璃球单层中的光学可视化实验进行研究。选择流体，使其成为将二氧化碳注射到深层含水层中的代理。预期的结果既具有基本的兴趣，又具有很大的实际相关性，因为它们可以改善CCS技术和地下水修复的预测性建模（残留NAPL的溶解（非水相）或混合气相。