Theoretical and Experimental Solutions for Dynamic-Hydraulic-Mechanical Processes in Geoenvironmental Engineering

地质环境工程中动态液压机械过程的理论和实验解决方案

• 批准号: RGPIN-2021-03604
• 负责人: AtefiMonfared, Kamelia
• 金额: $ 1.89万
• 依托单位: York University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 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=758051
• 关键词: Theoretical; Experimental; Solutions; Dynamic; Hydraulic

Efficient and sustainable solutions to global geoenvironmental challenges (e.g. water supply, energy generation, and geotechnical infrastructure sustainability) require a fundamental understanding of particle transport in porous media. The precipitation and entrapment of solid particles in porous media are crucial phenomena, resulting in pore blockage during the operation of geothermal, hydrocarbon, and aquifer storage and recovery (ASR) systems; impacting water quality and system competence. Conversely, cementation and pore-filling could have a positive effect on engineering properties of geomaterials; and are key mechanisms behind bio-mediated stabilization of infrastructure. The advanced understanding of physical interactions between mechanical waves and entrapped fine particles in porous media is critical for developing groundbreaking stimulation strategies to: (i) avoid/reduce/treat pore blockage; and (ii) control pore blockage to enhance field-scale bio-mediated soil stabilization. There are many uncertainties regarding fundamental mechanisms involved in particle transport, and wave propagation in saturated media. Furthermore, experimental attempts to establish the link between the aforementioned two phenomena have yielded inconsistent results; and there is currently no coupled theory to explain wave propagation in saturated media containing entrapped fines. The underlying theme of the proposed research program relates to dynamic-hydraulic-mechanical coupling in porous media, and focused on substantially closing these critical scientific gaps. We propose rigorous theoretical modeling and advanced physical experimentation, to achieve three specific goals: 1) develop new microscale theoretical models to enable accurate study of precipitation/mobilization/straining of fine particles. 2) Develop new multiscale theoretical models for wave propagation in saturated media, exploring coupled relations between wave parameters, the microstructure, and the macroscale parameters of the domain. Finally, from the new fundamental understandings, we will develop new theory to explain for the first-time physical interactions between mechanical waves and entrapped fines. 3) Conduct pilot-scale lab tests to verify the developed models, and to evaluate wave effects on formation and rupture of physical/biological clogging. Hence, this research program will add a new dimension to design of energy, water and bio-stabilization processes by integrating vibratory stimulation into injection strategies. The theoretical and experimental models obtained from this research will not only advance the scientific knowledge, but the state of practice in various geoenvironmental operations. The obtained solutions could prevent environmental disasters due to wellbore breakout and contamination of soil and water resources. Developed strategies will also enable large-scale implementation of bio-mediated stabilization techniques, which have been prevented mainly due to clogging.

有效和可持续的解决方案，以全球地质环境的挑战（如供水，能源发电和岩土基础设施的可持续性）需要多孔介质中的颗粒传输的基本理解。固体颗粒在多孔介质中的沉淀和截留是至关重要的现象，导致地热、碳氢化合物和含水层储存和回收（ASR）系统运行期间的孔隙堵塞;影响水质和系统能力。相反，胶结和孔隙填充可能对地质材料的工程特性产生积极影响;并且是生物介导的基础设施稳定化背后的关键机制。深入了解机械波和多孔介质中截留的细颗粒之间的物理相互作用对于开发突破性的增产策略至关重要：（i）避免/减少/处理孔隙堵塞;（ii）控制孔隙堵塞，以增强现场规模的生物介导的土壤稳定。有许多不确定性的基本机制，涉及粒子输运，波在饱和介质中的传播。此外，建立上述两种现象之间的联系的实验尝试产生了不一致的结果，目前还没有耦合理论来解释波在饱和介质中的传播包含截留罚款。拟议研究计划的基本主题涉及多孔介质中的动态-水力-机械耦合，并专注于大幅缩小这些关键的科学差距。我们提出了严格的理论建模和先进的物理实验，以实现三个具体目标：1）开发新的微尺度理论模型，使精细颗粒的沉淀/动员/应变的准确研究。2)开发新的多尺度理论模型，波在饱和介质中的传播，探索波参数，微观结构和宏观参数的域之间的耦合关系。最后，从新的基本认识，我们将发展新的理论来解释第一次机械波和捕获的罚款之间的物理相互作用。3)进行中试规模的实验室测试，以验证开发的模型，并评估波浪对物理/生物堵塞的形成和破裂的影响。因此，这项研究计划将增加一个新的维度，设计的能量，水和生物稳定过程中，将振动刺激注入策略。从这项研究中获得的理论和实验模型不仅将推进科学知识，但在各种地质环境操作的实践状态。所获得的解决方案可以防止由于井眼坍塌和土壤和水资源污染而引起的环境灾害。制定的战略还将使生物介导的稳定技术的大规模实施，这主要是由于堵塞而被阻止。