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Full-Text Articles in Geophysics and Seismology
Geomechanical Modeling Of A Fault During Fluid Injection, Charles Kw Hulls
Geomechanical Modeling Of A Fault During Fluid Injection, Charles Kw Hulls
Electronic Thesis and Dissertation Repository
The injection of fluid into rock masses as a part of industrial processes, such as hydraulic fracturing, can lead to an increase in seismic activity. The movement of the injected fluid and resulting stresses can be simulated and analyzed. One aspect of this analysis is the predicted rate of seismic activity, obtained via the Dietrich rate-and-state law and the Coulomb Failure Stress. This work produces simulations for two fracturing scenarios in the Duvernay Shale region. Model parameters, such as layer permeability and timing of fault slip, are varied to determine their impact on the model results. The simulated results show …
Geomechanical Modelling Of Induced Seismicity, Bodi Zhao
Geomechanical Modelling Of Induced Seismicity, Bodi Zhao
Electronic Thesis and Dissertation Repository
In recent years, there has been a dramatic increase in seismicity (earthquakes) due to anthropogenic activities related to the unconventional oil and gas exploration in the Western Canada Sedimentary Basin (WCSB) and the central U.S. There are compelling evidences that hydraulic fracturing and wastewater injection operations in those areas play a key role in induced seismicity. To better understand the physical mechanisms involved, this thesis aims to explore the mechanisms responsible for occurrence of induced earthquakes: mainshock-aftershock triggering mechanism and poroelastic response. In the first approach, the obtained results indicate the relationship between the Coulomb stress changes after 4 moderate …