About: Shear and tensile earthquakes caused by fluid injection

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

Attributes	Values
rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
rdfs:seeAlso	http://www.agu.org/pubs/crossref/2011/2010GL045447.shtml
Description	We apply rock mechanics concepts to the seismological observations in order to explain why during hydraulic injection some events display tensile and some shear deformation. The presence of non-shear components depends on the differential stress and the fracture orientation with respect to the s1 direction. Provided the slip vector is parallel to the traction we define four types of earthquakes according to the ratio of the shear and tensile components. Assuming a Griffith failure envelope, hybrid events containing both shear and tensile components can occur for fractures striking within 22.5o of s1. We argue that pure tensile fractures striking parallel to s1 are unlikely in the presence of natural fractures. The low shear traction of tensile events also implies their small stress drops. By applying the analysis to two different data sets, Soultzsous- Forets and Cotton Valley, we show that different orientations of natural fractures and differential stress in the targeted formations made each region favorable for different non-DC components in the injection-induced seismicity. Citation: Fischer, T., and A. Guest (2011), Shear and tensile earthquakes caused by fluid injection, Geophys. Res. Lett., 38, L05307, doi:10.1029/2010GL045447. We apply rock mechanics concepts to the seismological observations in order to explain why during hydraulic injection some events display tensile and some shear deformation. The presence of non-shear components depends on the differential stress and the fracture orientation with respect to the s1 direction. Provided the slip vector is parallel to the traction we define four types of earthquakes according to the ratio of the shear and tensile components. Assuming a Griffith failure envelope, hybrid events containing both shear and tensile components can occur for fractures striking within 22.5o of s1. We argue that pure tensile fractures striking parallel to s1 are unlikely in the presence of natural fractures. The low shear traction of tensile events also implies their small stress drops. By applying the analysis to two different data sets, Soultzsous- Forets and Cotton Valley, we show that different orientations of natural fractures and differential stress in the targeted formations made each region favorable for different non-DC components in the injection-induced seismicity. Citation: Fischer, T., and A. Guest (2011), Shear and tensile earthquakes caused by fluid injection, Geophys. Res. Lett., 38, L05307, doi:10.1029/2010GL045447. (en)
Title	Shear and tensile earthquakes caused by fluid injection Shear and tensile earthquakes caused by fluid injection (en)
skos:prefLabel	Shear and tensile earthquakes caused by fluid injection Shear and tensile earthquakes caused by fluid injection (en)
skos:notation	RIV/00216208:11310/11:10106075!RIV12-AV0-11310___
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(IAA300120905), Z(MSM0021620855)
http://linked.open...iv/cisloPeriodika	11.3. 2011
http://linked.open...vai/riv/dodaniDat	2012
http://linked.open...aciTvurceVysledku	Fischer, Tomáš
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Univerzita Karlova v Praze / Přírodovědecká fakulta
http://linked.open...dnocenehoVysledku	229109
http://linked.open...ai/riv/idVysledku	RIV/00216208:11310/11:10106075
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	site; inversion; texas; Fracture (en)
http://linked.open.../riv/klicoveSlovo	site texas Fracture inversion
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[4D31CD9A4042]
http://linked.open...i/riv/nazevZdroje	Geophysical Research Letteres
http://linked.open...in/vavai/riv/obor	DC
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Dynamics of crustal fluids in the western part of the Bohemian Massif as a probe of the stress changes
http://linked.open...UplatneniVysledku	2011
http://linked.open...v/svazekPeriodika	38
http://linked.open...iv/tvurceVysledku	Fischer, Tomáš Guest, Alice
http://linked.open...ain/vavai/riv/wos	000288327900001
http://linked.open...n/vavai/riv/zamer	Material flow mechanisms in the upper spheres of the Earth
issn	0094-8276
number of pages	4 (xsd:int)
http://bibframe.org/vocab/doi	10.1029/2010GL045447
http://localhost/t...ganizacniJednotka	11310

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