The Fault is Breathing: Porosity Waves and What Seismic Cannot Tell You
The Fault is Breathing Porosity Waves and what Seismic cannot tell you. Two phenomena share the word "wave" in subsurface geology. One carries energy. The other carries mass. Confusing them is not a semantic error — it is an interpretive one with multi-million dollar consequences. In a deforming rock matrix, fluid doesn't just "leak"—it propagates as a solitary pulse of high pressure and increased porosity. This is governed by a non-linear advective essence where velocity is coupled to the rock’s permeability. The fault isn't just a surface; it's a time-varying permeability valve. ∂ϕ/∂t + ∂/∂z ( V w · ϕ n ) = 0 Note: V w increases where the rock dilates. Dilation increases local permeability (k ∝ ϕⁿ), creating a self-reinforcing gradient that pulls the wave into the dilatant trishear zone. The Structural Precursor: Dilation Before Flow One of the most nuanced features of our m...
