Temporal Relationship Between Injection Rates and Induced Seismicity

0495328 - ÚSMH 2019 RIV CH eng J - Journal Article
Vlček, Josef - Eisner, Leo - Stabile, T.A. - Telesca, L.
Temporal Relationship Between Injection Rates and Induced Seismicity.
Pure and Applied Geophysics. Roč. 175, č. 8 (2018), s. 2821-2835. ISSN 0033-4553. E-ISSN 1420-9136
Grant - others:AV ČR(CZ) CNR-16-17
Program: Bilaterální spolupráce
Institutional support: RVO:67985891
Keywords : hydraulic stimulation * microseismicity * crosscorrelation * induced seismicity
OECD category: Volcanology
Impact factor: 1.466, year: 2018
https://link.springer.com/article/10.1007/s00024-017-1622-y

Normalized cross-correlation of effective functions was originally developed to differentiate induced and natural seismicity. We apply this methodology to data sets acquired during hydraulic stimulation of shale gas to study temporal relationship between seismicity and the injection. Delays of seismicity induced by hydraulic fracturing are compared with delays of seismicity related to changes of the water level in a dam. A new observation is made, we show that seismicity induced by hydraulic fracturing and measured by the normalized cross-correlation can have very positive to even short negative delay after the injection. We explain this observation by rapid decline of induced seismicity after decrease of injection. On the contrary, we show that the seismicity triggered by water impounding in a dam is characterized by longer delays due to much greater distance between lake and the induced seismicity. We show how it is possible to measure the delay by the cross-correlation methodology despite periodicity of the signals.
Permanent Link: http://hdl.handle.net/11104/0288341