Blanke, Aglaja and Boese, Carolin M and Dresen, Georg and Bohnhoff, Marco and Kwiatek, Grzegorz (2023) Metre-scale damage zone characterization using S-coda waves from active ultrasonic transmission measurements in the STIMTEC project, URL Reiche Zeche, Germany. Geophysical Journal International, 233 (2). pp. 1339-1355. DOI: https://doi.org/10.1093/gji/ggad003
Full text not available from this repository.Abstract
Studies of controlled hydraulic stimulation experiments with active and passive seismic monitoring conducted in Underground Research Laboratories (URLs) benefit from specific knowledge of hydraulic parameters, close by microseismic monitoring revealing structural details of the rock mass, and detailed evolution of seismicity in response to injection operations. Microseismic monitoring is commonly used to characterize a stimulated reservoir volume, for example, in terms of damage evolution of the rock mass. Since seismic attenuation is affected by damage of the rock volume, active seismic sources covering sizes from the centimetre to decimetre scale may help us to investigate space–time varying attenuation properties in a reservoir. This may allow us to monitor damage evolution of the stimulated rock volume in more detail, also since active seismic sources produce stronger signals leading to a broader frequency range that can be analysed compared to passive seismic signals. Within the STIMTEC project in the URL Reiche Zeche (URL-RZ) in Freiberg (Germany), more than 300 active Ultrasonic Transmission (UT) measurements were performed before and after hydraulic stimulations in two boreholes in the targeted rock volume, an anisotropic metamorphic gneiss. The signal-frequency content ranges between 1 and 60 kHz.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Coda waves, Controlled source seismology, Mirostructures, Seismic attenuation, Spatial analysis, Wave scattering and diffraction |
| Subjects: | Inducing technology > Laboratory experiment Methodology > Other-additional study Region > Germany |
| Project: | Geo-INQUIRE > STIMTEC: Fluid injection experiment |