Crosswell seismic applications to highly heterogeneous tight gas reservoirs

The Effect of Correlated Permeability on Fluid‐Induced Seismicity

“…β captures the level of spatial correlation in the porosity/permeability field, with β = 0 corresponding to the uncorrelated case. The correlations in most well‐logs are due to spatial fluctuations in the density of grain‐scale fractures (Leary & Walter, 2008). The existence of fractures impacts the porosity/permeability measurements (Bean, 1996), and fractures themselves contribute to $$\frac{1}{{k}^{\beta }}$$ spectra in well‐logs (Dolan et al., 1998; Goff & Holliger, 1999; Holliger, 1996).…”

“…This empirical relation mathematically links grain‐scale fractures to fluid percolation via fracture density (Leary & Al‐Kindy, 2002; Malin et al., 2020). In particular, it allows a simple physical interpretation of how porosity controls permeability through inter‐connectivity of fracture networks that allow fluids to propagate through these networks from cm to Km scale in a heuristically plausible way (Leary & Walter, 2008). McKean et al.…”