Computational Analysis of Geological Formations on Multiple-Length and Time Scales

多长度和时间尺度上地质构造的计算分析

• 批准号: 2442212
• 金额: --
• 依托单位: Swansea University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2442212
• 关键词: Computational; Analysis; Geological; Formations; Multiple

The main aim of this project is to undertake a multiscale characterisation of geological materials and formations. Geological formations often exhibit structure on several length-scales. For instance, in addition to the material microstructure, pervasive joint sets may exist below/at the resolution of the finite mesh employed in field-scale simulations. Consequently, a multi-level homogenization procedure will be developed to facilitate upscaling from: high definition image scale (< 2mm) -> scale of material heterogeneities (e.g. micro-cracks, small-scale natural fractures) -> geological-scale element size (5-10m). The multiscale nature of the problem is further compounded by the requirement to incorporate the multiple time-scales of the problem, which range from stress redistribution from seismically measurable dynamic fault propagation to the chemically dominated microstructure evolution that occurs on a scale of several million years. This will necessitate use of appropriate time-scales and the formulation of novel time-dependent material models on multiple time-scales.The proposed PhD research work will combine academic knowledge within Swansea University (Prof Peric) and industrial research expertise of industrial collaborator (Dr Crook, TCGA), with an aim to develop coupled geomechanical/flow modelling framework for simulation of field-scale and basin-scale evolution over geological time frames. Multiscale and multiphysics modelling techniques developed within this project will be embedded in a novel computational framework for strongly nonlinear problems, which will target simulations of very large-scale applications of geological processes.

该项目的主要目的是对地质材料和地层进行多尺度表征。地质构造通常在几个长度尺度上表现出结构。例如，除了材料微观结构之外，普遍的接头集可能存在于场尺度模拟中使用的有限网格的分辨率之下/处。因此，将开发一个多层次的均匀化程序，以促进从高清晰度图像尺度（<2 mm）->材料非均匀性尺度（例如微裂纹、小尺度天然裂缝）->地质尺度元素尺寸（5- 10 m）的升级。问题的多尺度性质进一步复杂化的要求，将多个时间尺度的问题，其范围从应力重新分布从地震可测量的动态故障传播的化学主导的微观结构的演变，发生在数百万年的规模。这将需要使用适当的时间尺度和制定新的时间依赖性材料模型在多个时间尺度。拟议的博士研究工作将联合收割机学术知识斯旺西大学（Peric教授）和工业合作者的工业研究专长（克鲁克博士，TCGA），目的是建立耦合地质力学/流动建模框架，用于模拟地质时间框架内的油田规模和盆地规模演变。本项目开发的多尺度和多物理场建模技术将嵌入强非线性问题的新计算框架，目标是模拟地质过程的大规模应用。