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Impact of seismic source processes on ground motion variability of induced earthquakes in geothermal reservoirs, mines and laboratory experiments

震源过程对地热库、矿山和室内实验诱发地震地面运动变异的影响

基本信息

批准号：
359163592
负责人：
Dr. Grzegorz Kwiatek, Ph.D.
金额：
--
依托单位：
Sektion 4.2: Geomechanik und Wissenschaftliches Bohren
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2017
资助国家：
德国
起止时间：
2016-12-31 至 2020-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/359163592?language=en
关键词：
Impact seismic source processes ground

项目摘要

The need to refine and further develop reservoir engineering techniques such as stimulation of geothermal reservoirs, exploitation of deep mines and utilizing other geo-reservoirs poses fundamental questions to be addressed such as mitigation of induced seismicity large enough to be felt on the surface. Of special concern in studies of induced seismicity are larger magnitude earthquakes, which might pose an extraordinary threat to engineering structures, raise public-acceptance issues or even cause a life-threat to underground workers in mines.Frequently, distances between induced earthquakes and vulnerable objects (engineering structures, local communities) are very small, often not exceeding a few kilometers. As a consequence, actual processes occurring in seismic source present an important contribution to recorded ground motions and to potential loses and damages. This project aims to investigate the contribution of physical processes occurring in the earthquake source to the observed ground motion variability with a special focus on the seismicity induced by man-made exploitation of georesources. The project also aims at understanding interactions between technological operations (e.g. ore exploitation, fluid injection), geomechanical/geological conditions and obtained high resolution information on processes in earthquake source in order to understand and mitigate the seismic hazard related to earthquakes and occurrence of large magnitude events.

由于需要改进和进一步发展储层工程技术，如地热储层的刺激、深井开采和利用其他地质储层，因此提出了一些需要解决的基本问题，如减轻诱发的地震活动，这些地震活动大到足以在地面上感觉到。诱发地震研究中特别关注的是震级较大的地震，它可能对工程结构造成极大的威胁，引起公众接受问题，甚至对矿井地下工作人员造成生命威胁。通常，诱发地震与脆弱物体（工程结构、当地社区）之间的距离非常小，通常不超过几公里。因此，在震源中发生的实际过程对记录的地面运动和潜在的损失和损害具有重要的贡献。该项目旨在研究震源中发生的物理过程对观测到的地面运动变化的贡献，特别关注人为开发地质资源引起的地震活动。该项目还旨在了解技术作业（如矿石开采、流体注入）、地质力学/地质条件之间的相互作用，并获得关于震源过程的高分辨率信息，以了解和减轻与地震和大规模事件发生有关的地震危险。