Influence of fluids on $V_\mathrm{P}/V_\mathrm{S}$ ratio: Increase or decrease?

The evolution of $V_\mathrm{P}/V_\mathrm{S}$ with increasing fluid-saturated porosity is computed for isotropic rocks containing spheroidal pores. $V_\mathrm{P}/V_\mathrm{S}$ is shown to either decrease or increase with increasing porosity, depending on the aspect ratio $α$ of the pores, fluid to so... View More