Injection-Induced Aseismic Slip in Tight Fractured Rocks
نویسندگان
چکیده
Abstract We investigate the problem of fluid injection at constant pressure in a 2D Discrete Fracture Network (DFN) with randomly oriented and uniformly distributed frictionally-stable fractures. show that this shares similarities simpler scenario single planar shear fracture, investigated by Bhattacharya Viesca (2019); (2021) whose results are here extended to include closed form solutions for aseismic moment as function injected volume $$V_\mathrm{{inj}}$$ V inj . Notably, we demonstrate hydro-mechanical response fractured rock mass is first order governed dimensionless parameter $$\mathcal {T}$$ T associated favourably fractures: low values (critically stressed conditions) lead fast migration slip from point due elastic stress transfer on critically In case, therefore, there no effect DFN percolation number spatio-temporal evolution slip. On other hand, marginally pressurized conditions ( {T} \gtrsim 1$$ ? 1 ), slipping patch lags behind region hence affects medium. Furthermore, scales $$\propto V_\mathrm{{inj}}^2$$ ? 2 both limiting conditions, similarly case fracture subjected same condition. The factor proportionality, however, depends characteristics while it appears be only mildly dependent properties conditions.
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ژورنال
عنوان ژورنال: Rock Mechanics and Rock Engineering
سال: 2023
ISSN: ['0723-2632', '1434-453X']
DOI: https://doi.org/10.1007/s00603-023-03249-8