Seismological monitoring of the KTB injection project

KTB注水工程地震监测

• 批准号: 5364062
• 负责人: Privatdozent Dr. Günter Asch
• 金额: --
• 依托单位: Helmholtz-Zentrum Potsdam - Deutsches GeoForschungsZentrum (GFZ)
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2002
• 资助国家: 德国
• 起止时间: 2001-12-31 至 2007-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5364062?language=en
• 关键词: Seismological; monitoring; KTB; injection; project

It is proposed to install a temporary seismological network at the KTB site to observe the induced seismicity during the proposed pumping and injection experiments. Precise detection and localization of the induced seismicity will enable investigations on the spatial-temporal evolution of the seismicity and will be a key point to characterize the stress state, fluid transport properties and stability of the rock system around the pumping/injection point. Small aperture arrays will be installed for increasing the signal to noise ratio and lowering the detection threshold. Additional seismometers will be placed in 50m and 500m deep boreholes to further increase the detection level. High precision absolute and relative location methods will be used which exploit the high waveform similarity expected for the induced seismicity. The proposed high-resolution monitoring system will produce 4 GByte on-line data per day which have to be processed in real time during the duration of the whole experiment. It is not possible to setup and operate an adequate system within one year. Hence we suggest a two step procedure to establish a full featured monitoring system and apply within this proposal only for the first part.

建议在 KTB 场地安装临时地震台网，以观测拟进行的抽水和注入实验期间的诱发地震活动。诱发地震活动的精确检测和定位将有助于研究地震活动的时空演化，并将成为表征抽水/注入点周围岩石系统的应力状态、流体传输特性和稳定性的关键点。将安装小孔径阵列以提高信噪比并降低检测阈值。将在50m和500m深的钻孔中放置额外的地震仪，以进一步提高探测水平。将使用高精度绝对和相对定位方法，利用诱发地震活动预期的高波形相似性。拟议的高分辨率监测系统每天将产生 4 GB 的在线数据，这些数据必须在整个实验期间进行实时处理。一年之内不可能建立并运行一个足够的系统。因此，我们建议采用两步程序来建立一个全功能的监控系统，并仅在本提案中应用第一部分。