The pore pressure behaviour of argillaceous formations subjected to induced shear

诱导剪切作用下泥质地层的孔隙压力行为

• 批准号: 554460-2020
• 负责人: Hendry, MichaelMT
• 金额: $ 7.28万
• 依托单位: University of Alberta
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=748951
• 关键词: pore; pressure; behaviour; argillaceous; formations

It is internationally recognized that the safest and most environmentally friendly location to store high-level and long-lived intermediate-level waste is in deep, stable geological formations. Argillaceous (clay-rich) formations represent the most common sediments on the surface of the earth, comprising between 50 and 70% of the geological material. Countries with argillaceous formations such as Canada, France, Belgium, Japan, Switzerland and the United States have been investigating low-porosity, low permeability argillaceous rocks to assess their potential as caprock (or host rock) for CO2 storage and nuclear waste disposal, which requires knowledge of their hydro-mechanical behaviour.The proposed research program represents an international collaboration between Canada's Nuclear Waste Management Organization, Switzerland's National Cooperative for Disposal of Radioactive Waste, Rocscience and the University of Alberta to develop a predictive numerical model that can help us understand the hydro-mechanical behaviour in argillaceous formations for the safe design of nuclear waste repositories. The primary objective of this work is to establish the relevant geomechanical coupled processes applicable for repository design and construction. This will be supplemented by the analysis of performance-based design (PBD) from other industries to aid in the development of a new PBD methodology applicable to nuclear repositories. In addition to the development of a novel numerical model and PBD methodology for industry, the research outcomes include the training of four Highly Qualified Personnel (HQP) at the University of Alberta, who will be provided with invaluable research opportunities in both laboratory and field settings, aiding to prepare them to be contributing members of Canada's engineering community.

国际公认，储存高放射性和寿命长的中放射性废物的最安全和最环保的地点是在深层、稳定的地质构造中。泥质（富含粘土）地层是地球表面最常见的沉积物，占地质物质的50%至70%。加拿大、法国、比利时、日本、瑞士和美国等拥有泥质地层的国家一直在研究低孔隙度、低渗透率的泥质岩石，以评估其作为盖层的潜力（或主岩）用于CO2储存和核废料处理，这就需要了解他们的水-机械行为。拟议的研究计划代表了加拿大核废物管理组织，瑞士国家放射性废物处置合作组织、Rocscience和阿尔伯塔大学合作开发了一个预测性数值模型，帮助我们了解泥质地层的水力机械特性，以便安全设计核废物处置库。这项工作的主要目标是建立相关的地质力学耦合过程适用于处置库的设计和建设。这将通过分析其他行业的基于性能的设计（PBD）来补充，以帮助开发适用于核处置库的新的PBD方法。除了为工业开发一种新的数值模型和PBD方法外，研究成果还包括在阿尔伯塔大学培训四名高素质人员（HQP），他们将在实验室和现场环境中获得宝贵的研究机会，帮助他们成为加拿大工程界的贡献者。