Quantitative analysis of frequency-domain induced polarization soundings over horizontal beds
Following up a recent study of an indirect procedure for the practical determination of the maximum frequency-effect, defined as fe = I - rho/sub infinity//rho/sub dc/ with rho/sub infinity/ the resistivity at infinite frequency, it is shown at first how, through the Laplace transform theory, rho/sub infinity/ can be related to stationary field vectors in the simple form of Ohm's law. Then applying the equation of continuity for stationary currents with a suitable set of boundary conditions, the integral expression of the apparent resistivity at infinite frequency is derived rho/sub infinity,a/ in the case of a horizontally layered earth. Finally, from the definition of the maximum apparent frequency-effect, analytical expressions of fe/sub a/ are obtained for both Schlumberger and dipole arrays placed on the surface of the multi-layered earth section in the most general situation of vertical changes in induced polarization together with dc resistivity variations not at the same interfaces. Direct interpretation procedures are suggested for obtaining the layering parameters directly from the analysis of the sounding curves.
- Research Organization:
- Univ., Bari, Italy
- OSTI ID:
- 6844354
- Journal Information:
- Geophys. Prospect.; (United States), Vol. 24:2; Conference: 37. meeting of the European Association of Exploration Geophysicists, Bergen, Germany, Jun 1975
- Country of Publication:
- United States
- Language:
- English
Similar Records
Interpretation of time-domain electromagnetic soundings in the Calico Hills area, Nevada Test Site, Nye County, Nevada
Interpretation of magnetotelluric resistivity and phase soundings over horizontal layers