Talwani, Pradeep and Acree, Steve (1985) Pore pressure diffusion and the mechanism of reservoir-induced seismicity. Pure and Applied Geophysics, 122 (6). pp. 947-965. DOI: https://doi.org/10.1007/BF00876395
Full text not available from this repository.Abstract
The study of reservoir-induced seismicity offers a controlled setting to understand the physics of the earthquake process. Data from detailed investigations at reservoirs in South Carolina suggested that the mechanism of transmission of stress to hypocentral locations is by a process of diffusion of pore pressure (Pp). These results were compared with available worldwide data. The ‘seismic’ hydraulic diffusivity, α s , was estimated from various seismological observations, and was found to be a good estimate of the material hydraulic diffusivity, α. Application of these results to a dedicated experiment to understand RIS at Monticello Reservoir, S.C., suggested that the diffusing Pp front plays a dual role in the triggering of seismicity. The spatial and temporal pattern of RIS can be explained by the mechanical effect of diffusion of Pp with a characteristic hydraulic diffusivity within an order of magnitude of 5×104 cm2/s, corresponding to permeability values in the millidarcy range. The triggering of seismicity is due to the combined mechanical effect of Pp in reducing the strength and, possibly, the chemical effect in reducing the coefficient of friction between the clays in the pre-existing fractures and the rocks that enclose these fractures.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | Mechanism reservoir, induced seismicity |
| Subjects: | Methodology > Method and procesing > Collective properties of seismicity Methodology > Method and procesing > Technology-seismicity interaction Inducing technology > Reservoir impoundment |
| Project: | IS-EPOS project |