Analysis of micro-seismic data to inform the siting, construction and operation of a geological deposal facility in the UK

分析微地震数据，为英国地质处置设施的选址、建设和运营提供信息

• 批准号: 2672954
• 金额: --
• 依托单位: University of Strathclyde
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2672954
• 关键词: Analysis; micro; seismic; data; inform

The project aims to develop a tool for automated analysis of microseismic events to be used as part of the UK siting process for a geological disposal facility (GDF) for nuclear waste. The UK launched its GDF siting programme in 2020 and, to-date, RWM are consulting with two volunteer communities about the potential for hosting a GDF at their locations. One important criterion for deciding on the preferred location for a GDF will be the local geology.Microseismic events can help us understand the locations of geological structures in the ground, without the need to drill large numbers of boreholes. Events occur naturally at construction depths for a GDF (200 m to 1 km below ground) and can also be induced by man-made activities during site investigation and construction. Each event corresponds to a rock fracturing, and hence, provides information on open fracture pathways for groundwater flow.The research challenges in analyzing microseismic data are (1) the difficulty in detecting, locating in 3D, and then analyzing the properties of these very tiny events amongst the background noise and (2) the sheer quantity of data caused by the high sampling frequency (> 500 Hz) which necessitates full automation of all analyses. This project will address these challenges and develop a reliable software tool for use in the site investigation and construction phases of a Geological Disposal Facility (GDF). One further use for such a tool is that the frequency of tiny events at any location is related to the likelihood of larger events, thus the project will support larger earthquake prediction and seismic hazard assessment, feeding back into GDF design.

该项目旨在开发一种自动分析微震事件的工具，作为联合王国核废料地质处置设施选址过程的一部分。英国于2020年推出GDF选址计划，迄今为止，RWM正在与两个志愿者社区就在其所在地举办GDF的可能性进行咨询。决定GDF首选位置的一个重要标准是当地的地质情况。微震事件可以帮助我们了解地下地质结构的位置，而无需钻大量的钻孔。对于GDF，事件在施工深度（地下200 m至1 km）自然发生，也可能由现场调查和施工期间的人为活动引起。每个事件对应于一个岩石破裂，因此，提供了关于地下水流动的开放裂缝路径的信息。分析微震数据的研究挑战是：（1）难以在3D中检测、定位，然后分析背景噪声中这些非常微小的事件的特性，以及（2）由高采样频率引起的数据的绝对量（> 500 Hz），这需要所有分析的完全自动化。该项目将应对这些挑战，并开发一个可靠的软件工具，用于地质处置设施（GDF）的现场调查和施工阶段。这种工具的另一个用途是，任何位置的微小事件的频率都与较大事件的可能性有关，因此该项目将支持较大的地震预测和地震危险性评估，并反馈到GDF设计中。