Development of Unified Experimental and Theoretical Approach to Predict Reactive Transport in Subsurface Porous Media

预测地下多孔介质反应输运的统一实验和理论方法的发展

基本信息

批准号：
EP/L012227/1
负责人：
Branko Bijeljic
金额：
$ 50.28万
依托单位：
Imperial College London
依托单位国家：
英国
项目类别：
Research Grant
财政年份：
2014
资助国家：
英国
起止时间：
2014 至无数据
项目状态：
已结题

来源：
https://gtr.ukri.org/projects?ref=EP%2FL012227%2F1
关键词：
Development Unified Experimental Theoretical Approach

项目摘要

This project aims to reduce the uncertainty and risk associated with key global challenges for the 21st century - securing sustainable access to water, energy and food. The underpinning understanding of natural systems to address this challenge is, in a large part, concerned with storage and extraction from porous rock: this includes safe storage of carbon dioxide to mitigate greenhouse gas emissions, efficient recovery from hydrocarbon reservoirs and groundwater management. Complex geological structures such as carbonate rock contain at least half of the world's conventional oil reserves, and have a significant storage capacity for CO2. The UK strategic energy plans include taking a leading role in enhanced oil recovery and carbon storage in carbonates. The most important UK aquifer is a remarkably pure limestone (calcium carbonate) providing more than half the water supply for drinking and industrial purposes. Transport - a quantitative description of how fluids move - through complex geological structures is absolutely crucial to a rational understanding of these processes in natural systems and yet it is still not fully understood, especially when coupled with chemical reactions. While it is well known that geological systems host physical and chemical processes that span a huge range of spatial and temporal scales, research - to date - has largely focused on understanding the structure of the porous medium, and the macroscopic description of the interplay between flow field, transport and reaction. However the interplay between pore structure, flow field, transport and chemical reaction is unknown.Chemical reaction introduces the next level of complexity that is particularly challenging to quantitatively describe across a hierarchy of length scales. We will address this problem for reactive transport in porous media by combining new experimental Nuclear Magnetic Resonance methods with a novel multiple scale modelling method. This unified approach will have a key advantage in retaining detailed information on localised reactive transport parameters in terms of spatial and temporal distribution functions, rather than only having spatially and/or temporally averaged macroscopic parameters. We will undertake a systematic program of research integrating pore-to-core scale measurements and modelling of reactive transport processes into a unified experimental and theoretical framework aimed at answering the following key questions:* How can we establish a methodology to measure and predict the reactive transport rates within aquifers and reservoirs?* What are relationships between structural, flow, transport and reaction properties governing reactive transport in natural rock?* What are key uncertainties in predicting reactive transport in natural rock in terms of structural, flow, transport and reaction properties?* What impact the transport and reaction physics at the pore scale have on reactive transport at the large scale?

该项目旨在减少与 21 世纪全球主要挑战相关的不确定性和风险 - 确保可持续获取水、能源和食物。对自然系统应对这一挑战的基础理解在很大程度上涉及多孔岩石的储存和提取：这包括安全储存二氧化碳以减少温室气体排放、从碳氢化合物储层中有效回收以及地下水管理。碳酸盐岩等复杂的地质结构蕴藏着世界上至少一半的常规石油储量，并且具有巨大的二氧化碳储存能力。英国战略能源计划包括在提高石油采收率和碳酸盐碳储存方面发挥主导作用。英国最重要的含水层是非常纯净的石灰石（碳酸钙），提供一半以上的饮用水和工业用水。输运——对流体如何在复杂的地质结构中移动的定量描述——对于合理理解自然系统中的这些过程绝对至关重要，但它仍然没有被完全理解，特别是与化学反应相结合时。众所周知，地质系统所发生的物理和化学过程跨越了巨大的时空尺度，但迄今为止的研究主要集中在了解多孔介质的结构以及流动之间相互作用的宏观描述上。场、传输和反应。然而，孔隙结构、流场、传输和化学反应之间的相互作用尚不清楚。化学反应引入了下一个层次的复杂性，这对于跨长度尺度层次结构进行定量描述尤其具有挑战性。我们将通过将新的实验核磁共振方法与新颖的多尺度建模方法相结合来解决多孔介质中的反应输运问题。这种统一方法的一个关键优势在于，在空间和时间分布函数方面保留局部反应输运参数的详细信息，而不是仅具有空间和/或时间平均的宏观参数。我们将开展一项系统的研究计划，将孔隙到岩心尺度的测量和反应输运过程的建模整合到一个统一的实验和理论框架中，旨在回答以下关键问题：*我们如何建立一种方法来测量和预测反应含水层和水库内的传输速率？* 控制天然岩石中反应传输的结构、流动、传输和反应特性之间的关系是什么？* 在结构、流动、传输和反应特性方面预测天然岩石反应传输的关键不确定性是什么?* 什么影响输运和反应物理在孔隙尺度上对大规模反应传输有影响吗？