Why rock resistivity is used to measure rock resistivity in an electric well?
If the current of the main electrode focuses deeper into the layer, then the information reflected by the measurement contains deeper information, whereas vice versa.
Dual laterolog is a logging method that focuses the current flowing out of the main electrode by setting a shielding electrode
Probing depth of logging in mean axial vertical direction of strata, therefore, refers to the deep lateral resistivity information can reflect relatively far from the borehole, and shallow lateral resistivity information reflected from the wellbore near.
