Scaling relations and spectral characteristics of tensile microseisms: evidence for opening/closing cracks during hydraulic fracturing

Autor:	Brad Birkelo, Jean-Baptiste Tary, David W. Eaton, Mirko van der Baan
Rok vydání:	2014
Předmět:	Geophysics Materials science Hydraulic fracturing Microseism Shear (geology) Geochemistry and Petrology Attenuation Ultimate tensile strength Moment magnitude scale Geometry Scaling Seismology Cutoff frequency
Zdroj:	Geophysical Journal International. 196:1844-1857
ISSN:	1365-246X 0956-540X
DOI:	10.1093/gji/ggt498
Popis:	SUMMARY Using formulae for both tensile and shear sources, we investigate spectral characteristics of microearthquakes induced by hydraulic fracturing, with application to passive-seismic data recorded during a multistage treatment programme in western Canada. For small moment magnitudes (Mw < 0), reliable determination of corner frequency requires accurate knowledge of QP and QS, although spectral estimates of magnitude are relatively unaffected by uncertainty in seismic attenuation. Here, we estimate QP and QS using spectral ratios derived from perforation shots. Of the microseismic events analysed during the hydraulic-fracture treatment, 17 of 20 exhibit an S/P spectral ratio
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cc5e7ac2d48e1b8456b044760782629d https://doi.org/10.1093/gji/ggt498 Zobrazit plný text záznamu