Volume 116, Number 5, December 2016
|Number of page(s)||6|
|Section||Geophysics, Astronomy and Astrophysics|
|Published online||23 January 2017|
Investigating the time clustering of induced microseismicity generated by hydraulic fracturing
1 CNR, Institute of Methodologies for Environmental Analysis - C.da S. Loja, 85050 Tito (PZ), Italy
2 Institute of Rock Structure and Mechanics, Czech Academy of Sciences - V Holešovičkách 94/41, Prague, 18209, Czech Republic
3 Faculty of Science, Charles University - Albertov 6, 12843, Prague, Czech Republic
Received: 31 October 2016
Accepted: 9 January 2017
By using the global and local coefficient of variation and the Allan Factor we investigated the time-clustering properties of the time dynamics of fluid-injection–induced microseismicity. The experiment consists of a microseismic monitoring through a nearly vertical borehole of 12 receivers of a hydraulic fracturing stimulation along a horizontal well separated into more than 20 sections (stages) The main finding of the applied methodology is the discrimination between fault triggering and new fracturing, being the first characterized by a clusterization of the induced microseismic events and the second by a Poissonian behaviour of the generated events.
PACS: 91.30.Dk – Seismicity / 05.45.Tp – Time series analysis / 05.45.Df – Fractals
© EPLA, 2016
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