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TitlePoroelastic modeling of hydraulic fracturing induced earthquake stress field
AuthorLarochelle, S; Liu, Y; Kao, H
SourceGeological Survey of Canada, Open File 8028, 2016, 27 pages,
PublisherNatural Resources Canada
Documentopen file
Mediaon-line; digital
File formatpdf
Subjectsgeophysics; mathematical and computational geology; earthquakes; earthquake mechanisms; fractures; fracture analyses; hydraulic fracturing; models; modelling; fluid migration; fluid flow; pore pressures
Illustrationsgraphs; block diagrams
ProgramShale Gas - seismicity, Environmental Geoscience
Released2016 04 05
Summary(Plain Language Summary, not published)
There is strong evidence to suggest that hydraulic fracturing operations used in shale gas recovery have caused the recent surge of earthquakes in Western Canada. The present report develops a numerical model to investigate how fluid migration from a hydraulic fracturing injection well to a preexisting fault disturbs the fault strength. Reduced fault strength can lead to earthquake generation or stable slip along the fault. This particular study is primarily concerned with integrating mechanical fluid-soil interactions in the model and demonstrating that the code FLAC3D can effectively be used to model this phenomenon. The effects of fluid injection in the vicinity of a fault are monitored during and after the injection and a preliminary value of fault slip is determined. The findings of this preliminary study could help in the development of more advanced models and thus increase our understanding of the mechanisms involved in induced seismicity.