Advanced petrophysics for the characterisation of trapping mechanisms for CO2 storage in the subsurface

用于表征地下二氧化碳封存捕集机制的先进岩石物理学

• 批准号: 2293851
• 金额: --
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2293851
• 关键词: Advanced; petrophysics; characterisation; trapping; mechanisms

This project will use the latest in petrophysical and digital rock core technology to improve our understanding of capillary and solubility trapping of CO2 in the subsurface, providing workflows and constitutive laws for a physics based representation of residual and dissolution trapping in field scale simulation. These are essential to enabling reliable modelling and assessment of potential geological CO2 storage sites.Experimental core floods with X-ray imaging at two scales - where pore scale features may be resolved in mm-scale samples in a micro XCT scanner, and where continuum properties are observed over cm-scale rock cores in a medical XCT scanner - will be combined with numerical modelling to meet the following objectives:1. Evaluate the impacts of rock heterogeneity on upscaled residual trapping, including the development of a characterisation workflow,2. Observe rates of mass transfer between CO2 and brine as a function of fluid flow rates, fluid saturations, fluid-fluid interfacial areas, distance from chemical equilibrium of the fluid system and length scale, including the development of a constitutive law to represent these rates in reservoir simulationContinuum numerical models of rock cores will be constructed, based on these observations of residual trapping in heterogeneous rock cores. Initial upscaling from these small size scales will be performed to develop an indication of the parameter space in which small scale heterogeneities must be characterised for accurate predictions of field scale trapping.

该项目将使用最新的岩石物理和数字摇滚核心技术来提高我们对地下二氧化碳捕集的毛细血管和溶解度捕获的理解，从而为基于物理的剩余和溶解陷阱在现场量表模拟中提供了工作流和构造法律。这些对于实现潜在地质二氧化碳存储地点的可靠建模和评估至关重要。实验性核心洪水在两个尺度上进行X射线成像 - 可以在微型XCT扫描仪中的MM尺度样品中解析孔隙尺度的特征，在MM尺度样品中，在CM-Scale Rock Cores conterum cocke cant scanner-nem-nem-nem num num cromist commiate commer commer commer commer commer commer commer commer compersive：comment of Contument scanne consection：comment。评估岩石异质性对高扫描残留捕获的影响，包括发展工作流程的发展，2。观察二氧化碳和盐水之间的质量转移率是流体流量，流体饱和度，流体流体界面区域的函数，与流体系统的化学平衡和长度规模的化学平衡的距离，包括构造法定的构成法律的发展速率，这些速率是基于这些岩石芯的岩石芯的模拟模拟模拟模型的，这些模型将基于这些岩石的构建，这些岩石是基于这些岩石cor的构建的。将对这些小尺寸尺度进行初始升级，以形成参数空间的指示，在该空间中，必须对小尺度异质性进行表征以准确预测场尺度陷阱。