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dc.contributor.author
Wang, Zineng
dc.contributor.author
Huang, Xin
dc.contributor.author
Huang, Zhaoqin
dc.contributor.author
Wang, Xiaoguang
dc.contributor.author
Lei, Qinghua
dc.date.accessioned
2020-12-07T11:04:57Z
dc.date.available
2020-12-06T09:06:53Z
dc.date.available
2020-12-07T11:04:57Z
dc.date.issued
2020-11-11
dc.identifier.issn
1755-1315
dc.identifier.issn
1755-1307
dc.identifier.other
10.1088/1755-1315/570/2/022043
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/454796
dc.identifier.doi
10.3929/ethz-b-000454796
dc.description.abstract
In order to meet the growing energy demand worldwide, the technology of hydraulic fracturing for shale gas extraction has been rapidly developed and applied in recent years. However, man-made fluid injection has also caused several problems of high societal concern such as induced earthquakes. The focus of this paper is on the process of induced fault activation in shale reservoirs caused by hydraulic stimulation activities. We constructed a two-dimensional numerical model representing the horizontal cross-section of a faulted reservoir and simulated important coupled hydro-mechanical processes during fluid injection. We parameterized our model with the site investigation data of an actual shale gas project including in-situ stress, rock properties and injection protocol, etc. We represented the natural fault zone as a geological composite involving a fault core and a damage zone consisting of a set of subsidiary fractures parallel to the fault strike. We coupled the solid deformation and fault displacement with Darcy-type fluid flow based on poroelasticity principles and hydro-mechanical constitutive relationships. The heterogeneous nature of the permeability of the shale formation is mimicked by a random field model governed by a log-normal probability density function and directional correlation lengths, such that we can explore the impact of reservoir heterogeneity on the fault slip behaviour. In addition, we also studied the effects of fault length, dip angle and injection point-to-fault distance on the fault slip. Specifically, we analysed the link between fault slip and fluid flow field, permitting the capture of fluid movement in the heterogeneous faulted reservoir, the temporal and spatial evolution of preferential flow channels and their consequences on induced fault slip. The results of this research have important implications for understanding the triggering processes and mechanisms of fault slip during shale gas exploitation as well as many other injection-related engineering activities.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
Institute of Physics
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/3.0/
dc.title
Impact of reservoir heterogeneity on fluid injection-induced fault slip: insights from numerical simulation
en_US
dc.type
Conference Paper
dc.rights.license
Creative Commons Attribution 3.0 Unported
ethz.journal.title
IOP Conference Series: Earth and Environmental Science
ethz.journal.volume
570
en_US
ethz.pages.start
022043
en_US
ethz.size
10 p.
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.event
China Rock 2020 - 17th CSRME Annual Conference
en_US
ethz.event.location
Beijing, China
en_US
ethz.event.date
October 23-26, 2020
en_US
ethz.identifier.scopus
ethz.publication.place
London
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02704 - Geologisches Institut / Geological Institute::03465 - Löw, Simon / Löw, Simon
en_US
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02330 - Dep. Erdwissenschaften / Dep. of Earth Sciences::02704 - Geologisches Institut / Geological Institute::03465 - Löw, Simon / Löw, Simon
en_US
ethz.date.deposited
2020-12-06T09:07:10Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2020-12-07T11:05:10Z
ethz.rosetta.lastUpdated
2021-02-15T21:29:14Z
ethz.rosetta.versionExported
true
ethz.COinS
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