CAREER: An Integrated Experimental-Theoretical Framework for Understanding the Multiscale Mechanical Response of Rock-Reactive Brine Interactions

职业：用于理解岩石反应盐水相互作用的多尺度机械响应的综合实验理论框架

基本信息

批准号：
2045242
负责人：
Sara Abedi
金额：
$ 50万
依托单位：
Texas A&M Engineering Experiment Station
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2021
资助国家：
美国
起止时间：
2021-02-01 至 2026-01-31
项目状态：
未结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2045242&HistoricalAwards=false
关键词：
CAREER Integrated Experimental Theoretical Framework

项目摘要

This Faculty Early Career Development (CAREER) program will support research to understand and elucidate the evolution of the mechanical properties of rocks when interacting with reactive brine. The interaction between rocks and reactive brine in harsh environments plays an important role in several applications, such as stability of slopes and abandoned underground caves, carbon sequestration, enhanced geothermal systems, reservoir stimulation, and contaminant transport. By understanding how rock-reactive brine interaction affects the mechanical properties of rocks, it will be possible to develop more realistic physical-chemical models that are critical for predicting rock mechanical stability and for quantitatively interpreting geophysical monitoring data. However, the challenge comes from the complex multiscale and heterogeneous nature of rocks and the complexity of rock-reactive brine interactions, making the traditional experimental and modeling techniques ineffective for this problem. This project uses novel multiscale experiments and theory to reveal the origins of how mechanical properties of rocks change when exposed to reactive brine. The outcomes of this project will serve the society by enhancing infrastructure system resiliency, and energy and resource efficiency. This project also has a comprehensive education and outreach plan to broaden the participation of underrepresented minorities in STEM and enhance education in chemistry and mechanics of rock and fluid interaction. This is done through engaging traditionally underrepresented high school students, increasing the general public’s understanding of the impact of rock and fluid interaction, and educating graduate and undergraduate students in collaborative and interdisciplinary research activities. The main activity is recruiting underrepresented undergraduates and engaging high school students via an extended outreach program entitled “Rocks and Fluids.” The objectives of this CAREER program are to (1) Understand the effect of chemo-mechanical rock-reactive brine interaction on the microstructural/morphological texture and compositional properties of rocks; (2) Determine the relationship between chemo-mechanical loading and geomechanical response at multiple scales; and (3) Determine the stress/strain distribution within the rock as a function of its time-evolving microstructure, induced by chemical and mechanical effects, using a physical-chemical pore-scale model. The research approaches include micro-scale chemo-mechanical characterization of individual rock constituents, macro-scale mechanical assessment, and microstructural characterization of rock samples before and after exposure to reactive brine at high temperature and pressure conditions; and development of a pore-scale model to gain insight into time-dependent mechanical and deformational behavior of rocks influenced by chemo-mechanical interactions. Research findings will lead to physics-based interpretation of monitoring data and enhancement of the mechanical stability rocks.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

该教师早期职业发展（职业）计划将支持研究，以了解和阐明与反应性盐水互动时岩石机械性能的演变。岩石和反应性盐水之间在HARMSH环境中的相互作用在几种应用中起着重要作用，例如插槽的稳定性和废弃的地下洞穴，碳固存，增强的地热系统，储层刺激和污染物的运输。通过了解岩石反应性的盐水相互作用如何影响岩石的机械性能，可以开发出更现实的物理化学模型，这些模型对于预测岩石机械稳定性和定量解释地球物理监测数据至关重要。但是，挑战来自岩石的复杂多尺度和异质性质以及岩石反应性盐水相互作用的复杂性，使传统的实验和建模技术无效。该项目使用新颖的多尺度实验和理论来揭示岩石机械性能在暴露于反应性盐水时如何变化的起源。该项目的结果将通过提高基础设施系统的弹性以及能源和资源效率来为社会服务。该项目还制定了全面的教育和外展计划，以扩大代表性不足的少数群体参与STEM和增强岩石和液体互动机械的教育。这是通过传统上代表性不足的高中生吸引的，增加了公众对岩石和流体互动影响的理解，并在协作和跨学科研究活动中对毕业生和本科生进行教育。主要活动是招募人数不足的本科生，并通过题为“岩石和液体”的扩展外展计划吸引高中生。该职业计划的目标是（1）了解化学机械岩石反应性的盐水相互作用对岩石的微结构/形态纹理和组成特性的影响；（2）确定在多个尺度上的化学机械载荷与地质力学反应之间的关系；（3）使用物理化学孔隙尺度模型确定岩石内的应力/应变分布，这是由化学和机械效应引起的，由化学和机械效应引起的函数。研究方法包括在高温和压力条件下暴露于反应性盐水之前和之后，在暴露于反应性盐水之前和之后，对单个岩石构建体的微型化学机械表征以及岩石样品的微结构表征；以及开发孔隙尺度模型，以深入了解受化学机械相互作用影响的岩石的时间依赖性机械和变形行为。研究结果将导致基于物理的监测数据的解释和增强机械稳定性岩石的增强。该奖项反映了NSF的法定任务，并通过使用基金会的知识分子优点和更广泛的影响来评估审查标准，被认为是珍贵的支持。