Evidence for correlation of electrical resistivity and seismic velocity in heterogeneous near‐surface materials

Abstract

[1] The electrical resistivity and seismic velocity distributions over a buried hillside have been obtained using non-invasive controlled experiments on coincident profiles and 2D image reconstructions. The optimal images are in structural agreement and allow the deduction of two opposite resistivity-velocity trends in the near-surface materials. For both trends, the resistivity (r) and p-wave velocity (V p ) are related in the form Log 10 r = mLog 10 V p + c with the respective constants m and c having different signs in unconsolidated and consolidated materials.

Characterizing a large shear‐zone with seismic and magnetotelluric methods: The case of the Dead Sea Transform

“…[13] The spatial coincidence of domains of low velocities and resistivities on the western side and higher values at comparable depths on the eastern side suggests a correlation of these different physical parameters as observed in other studies [e.g., Meju et al, 2003]. Figure 2 (right) shows a histogram of velocities (V p ) versus resistivities (log r), having tabulated coincident parameter pairs from the models shown.…”

Controlled-source electromagnetics for reservoir monitoring on land

“…We determined the resistivity of the sediments by (v/1700) 3.88 Ωm, with the velocity v in m/s. The paper of Meju et al (2003) motivated this choice. For air, we used a resistivity of 10 8 Ωm.…”

“…Originally, this model consists of velocity values, designed for simulating seismic wave propagation. To study whether the complexity of model affects the inversion of the EM monitoring problem, we chose to work with this model, replacing velocities by resistivities according to ρ = (v/1700) 3.88 , as suggested by Meju et al (2003). In this 3D model, we selected one part as an artificial reservoir sand that contains oil and water.…”

“…As a starting point for studying the monitoring problem, we modified the Overthrust model (Aminzadeh et al, 1997) to obtain a realistic and complex subsurface resistivity, replacing velocities by resistivities according to ρ = (v/1700) 3.88 , as suggested by Meju et al (2003). Here, v is the velocity in m/s and ρ the resistivity in Ωm.…”

Geophysical modelling of 3D electromagnetic diffusion with multigrid

“…The conductivity of the sediments was determined by σ sed = (v/1700) −3.88 S/m, with the velocity v in m/s. This choice was motivated by [21]. For air, σ was set to 10 −10 S/m.…”