oa Self-potential Inversion for the Permeability and Streaming Current Coefficient Using the Rock Physical Empirical Law

In this study, we extendedour2D inversion program that estimate the permeability structure from Self-potential (SP) profile to include the equation describing the permeability and streaming current coefficient. The SP is affected by the permeability, streaming current coupling coefficient and resistivity. Recently, the equation that describes the relationship between permeability and streaming current has been proposed and this equation is independent on the kind of soil or rock. We use this equation for our inversion and improve to our scheme. We apply our scheme to the synthetic SP profile and compare the inversion result considered the relationship to one ignored the relationship. Our inversion results show the difference in the inversion image, especially the value of estimated permeability. From this result, consideration of the relationship between permeability and streaming current coefficient is necessary for the accurate analysis of SP profile.