Installation of microseismic monitoring networks in geothermal fields

• Published in: Gazi Üniversitesi Mühendislik Mimarlık Fakültesi dergisi Vol. 38; no. 3; p. 1307
• Main Authors: Tunc, Suleyman, Selek, Burcu, Koca, Begum, Selek, Unal Salih, Balci, Kadir, Yildirim, Ali, Kaypak, Bulent
• Format: Journal Article
• Language: English
• Published: 2023
• Subjects: Geothermal Systems; Microseismic Monitoring; Noise Analysis; Passive Seismic
• ISSN: 1300-1884; 1304-4915
• DOI: 10.17341/gazimmfd.1050313

Purpose: How the optimum microseismic monitoring network should be installed for induced seismicity studies in selected geothermal area. So, noise analysis results are given in borehole and surface locations using different type of seismometers in selected locations. Theory and Methods: In induced seismicity analysis, high frequency, low energy and small amplitude microseismic events are obtained within continuous passive seismic records. Noise analysis important step of the network installation before the data analysis and determining microseismic events. So, the background noise at the locations are compared from borehole and surface stations in same points. Results: According to compared results, the noise level in the well is very low compared to the surface and this is at suitable level to obtain microseismic events clearly. So, borehole seismic sensors can be preferred in microseismic monitoring networks in induced seismicity studies.Conclusion: Reservoir management is crucial subject for geothermal studies. So, microseismic monitoring method provides continues results about the geothermal reservoir and these results are used in the reservoir management. In fact, microseismic monitoring method is generally standard in abroad but there are no detailed studies in our country. This study is the first study to monitor microseismic activities using borehole seismometers. The study includes network installations and optimum array design also. Noise level must be low level to obtain microseismic events clearly. It can be provided using borehole seismometers in indused seismicity studies.