Fracturing and Porosity Channeling in Fluid Overpressure Zones in the Shallow Earth’s Crust

Figure 2

Setup of the numerical model. (a) Model box with free-slip elastic walls at the bottom and the right- and left-hand side and a stress boundary at the top. The inset shows the lattice for the elastic solid and the fluid, respectively. (b) Simulation setup with the initial configuration followed by an input of fluid pressure, the fluid pressure evolution, the elastic relaxation, the internal failure until the model is relaxed, and the repetition of the time step. (c) Geometry of the source zones where fluid is introduced successively during model runs for the 3 different scenarios modelled. Source zones are shown in pink.

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