Low field NMR studies to probe motion and dynamics in rock pore structures

低场核磁共振研究探测岩石孔隙结构的运动和动力学

• 批准号: 2659400
• 金额: --
• 依托单位: University of Manchester
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2659400
• 关键词: Low; field; NMR; studies; probe

NMR hardware has advanced significantly in recent years with compact, bench-top, low-field NMR spectrometers now able to perform spectrally-resolved NMR experiments, including quantitative multi-nuclear spectroscopy as well as pulsed-field gradient (PFG) NMR and relaxometry. This project will take advantage of these advancements and investigate the development of experimental protocols in two main areas of application. Firstly, the aspects of fluid-rock chemical interactions, molecular transport and dynamics in rock systems. The aim is to predict the results of costly and time-consuming core flooding experiments, vital for the selection of the appropriate enhanced oil recovery (EOR) techniques, and hence offer a faster and less energy intensive alternative. EOR techniques can substantially extend the effective production life of oil production assets but selecting the right one is key. In the second part of the project, the study of carbon dioxide (CO2) behaviour in rocks will be studied in order to develop a sound basis for determining the suitability of its geological storage. Studies of NMR diffusion and adsorption will be conducted on CO2 in the presence of hydrocarbons and brines in order to understand how operating conditions (pH, salinity, surfactants) affect the behavior of the system in terms of transport and adsorption in different storage materials.

近年来，NMR硬件有了显著的进步，紧凑的台式低场NMR光谱仪现在能够进行光谱分辨NMR实验，包括定量多核光谱以及脉冲场梯度（PFG）NMR和弛豫法。该项目将利用这些进步，并研究在两个主要应用领域的实验协议的发展。 第一，流体-岩石化学相互作用，岩石系统中的分子输运和动力学方面。其目的是预测昂贵和耗时的岩心驱替实验的结果，这对于选择适当的提高石油采收率（EOR）技术至关重要，因此提供了一种更快，更低能耗的替代方案。EOR技术可以大大延长石油生产资产的有效生产寿命，但选择正确的技术是关键。 在该项目的第二部分，将研究二氧化碳在岩石中的行为，以便为确定其地质储存的适宜性奠定坚实的基础。NMR扩散和吸附的研究将在碳氢化合物和盐水的存在下对CO2进行，以了解操作条件（pH值，盐度，表面活性剂）如何影响系统在不同存储材料中的传输和吸附行为。